ORDER NO. KM40506787CE
Telephone Equipment
KX-TG2820LAB
KX-TG2822LAB
KX-TGA243LAB
KX-TGA246LAB
2.4 GHz Digital Cordless Phone
Black Version
(for Latin America)
© 2005 Panasonic Communications Co., Ltd. All
rights reserved. Unauthorized copying and
distribution is a violation of law.
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
Note:
Because CONTENTS 4 is the extract from the Operating Instructions of this model, it is subject to change without notice. You can
download and refer to the original Operating Instructions on TSN Server for further information.
CONTENTS
Page
Page
4
9.3. Signal Flowchart in the Whole System
49
1.1. Suggested PbF Solder
4
10 EXPLANATION OF LINK DATA COMMUNICATION
50
1.2. How to Recognize that Pb Free Solder is Used
5
10.1. Calling
50
2 FOR SERVICE TECHNICIANS
5
10.2. To Terminate Communication
50
3 CAUTION
5
10.3. Ringing
50
4 OPERATING INSTRUCTIONS
6
11 BLOCK DIAGRAM (BASE UNIT_MAIN)
51
4.1. Battery
6
12 BLOCK DIAGRAM (BASE UNIT_RF PART)
52
4.2. Location of Controls
8
13 CIRCUIT OPERATION (BASE UNIT_MAIN)
53
1 ABOUT LEAD FREE SOLDER (PbF: Pb free)
4.3. Displays
10
13.1. DSP (Digital Speech/Signal Processing: IC501)
53
4.4. Settings
11
13.2. EEPROM (IC611)
53
4.5. Troubleshooting
15
13.3. Power Supply Circuit
54
18
13.4. Reset Circuit
56
5.1. Base Unit
18
13.5. Telephone Line Interface
57
5.2. Handset
19
13.6. Parallel Connection Detect Circuit
58
5.3. Charger Unit
20
13.7. Calling Line Identification (Caller ID)
59
6 HOW TO REPLACE THE HANDSET LCD
21
13.8. 2.4GHz Mod/Demod Circuit (Base Unit RF Part)
60
7 TROUBLESHOOTING GUIDE
5 DISASSEMBLY INSTRUCTIONS
22
14 BLOCK DIAGRAM (HANDSET_MAIN)
61
7.1. Check Power
23
15 BLOCK DIAGRAM (HANDSET_RF PART)
62
7.2. Check Battery Charge
24
16 CIRCUIT OPERATION (HANDSET)
63
7.3. Check Link
25
16.1. Construction
63
7.4. Check the RF part
26
16.2. Power Supply Circuit
64
7.5. Check Handset Transmission
33
16.3. Charge Circuit
65
7.6. Check Handset Reception
33
16.4. Ringer and Handset SP-Phone
65
7.7. Check Caller ID
33
16.5. Sending Signal
66
34
16.6. Reception Signal
66
16.7. 2.4GHz Mod/Demod Circuit (Handset RF Part)
67
8 ADJUSTMENT AND TEST MODE
8.1. Test Mode Flow Chart for Base Unit
34
8.2. Test Mode Flow Chart for Handset
38
17 CIRCUIT OPERATION (CHARGER UNIT)
68
8.3. X501 (Base Unit), X201 (Handset) Check
42
18 SIGNAL ROUTE
69
8.4. Adjust Battery Low Detector Voltage (Handset)
42
19 CPU DATA (BASE UNIT)
70
8.5. Base Unit Reference Drawing
43
8.6. Handset Reference Drawing
44
8.7. Frequency Table
45
8.8. How to Clear User Setting (Handset Only)
46
9 DESCRIPTION
19.1. IC501
20 CPU DATA (HANDSET)
20.1. IC201
21 EXPLANATION OF IC TERMINALS (RF PART)
21.1. IC901
47
9.1. Frequency
47
9.2. FHSS (Frequency Hopping Spread Spectrum)
47
22 HOW TO REPLACE A FLAT PACKAGE IC
22.1. PREPARATION
2
70
71
71
72
72
73
73
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
22.2. FLAT PACKAGE IC REMOVAL PROCEDURE
73
22.3. FLAT PACKAGE IC INSTALLATION PROCEDURE
74
22.4. BRIDGE MODIFICATION PROCEDURE
74
89
23 CABINET AND ELECTRICAL PARTS (BASE UNIT)
75
29.2. Handset (SCHEMATIC DIAGRAM (HANDSET_MAIN)) 89
23.1. KX-TG2820LAB
75
29.3. Charger Unit (SCHEMATIC DIAGRAM (CHARGER UNIT))
23.2. KX-TG2822LAB
76
89
29 FOR SCHEMATIC DIAGRAM
89
29.1. Base Unit (SCHEMATIC DIAGRAM (BASE UNIT_MAIN))
24 CABINET AND ELECTRICAL PARTS (HANDSET)
77
30 SCHEMATIC DIAGRAM (BASE UNIT_MAIN)
90
25 CABINET AND ELECTRICAL PARTS (CHARGER UNIT)
78
31 SCHEMATIC DIAGRAM (BASE UNIT_RF PART)
92
26 ACCESSORIES AND PACKING MATERIALS
79
32 SCHEMATIC DIAGRAM (HANDSET_MAIN)
94
26.1. KX-TG2820LAB
79
33 SCHEMATIC DIAGRAM (HANDSET_RF PART)
96
26.2. KX-TG2822LAB
80
34 SCHEMATIC DIAGRAM (CHARGER UNIT)
97
35 CIRCUIT BOARD (BASE UNIT_MAIN)
99
27 TERMINAL GUIDE OF THE ICs, TRANSISTORS AND DIODES
35.1. Component View
81
99
27.1. Base Unit
81
27.2. Handset
81
36 CIRCUIT BOARD (BASE UNIT_RF PART)
101
27.3. Charger Unit
82
37 CIRCUIT BOARD (HANDSET_MAIN)
103
35.2. Flow Solder Side View
100
83
37.1. Component View
103
28.1. Base Unit
83
37.2. Flow Solder Side View
104
28.2. Handset
85
38 CIRCUIT BOARD (HANDSET_RF PART)
105
28.3. Charger Unit
87
39 CIRCUIT BOARD (CHARGER UNIT)
106
28.4. Accessories and Packing Materials
87
39.1. Component View
106
28.5. Fixtures and Tools
87
39.2. Flow Solder Side View
106
28 REPLACEMENT PARTS LIST
3
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
1 ABOUT LEAD FREE SOLDER (PbF: Pb free)
Note:
In the information below, Pb, the symbol for lead in the periodic table of elements, will refer to standard solder or solder that
contains lead.
We will use PbF solder when discussing the lead free solder used in our manufacturing process which is made from Tin (Sn),
Silver (Ag), and Copper (Cu).
This model, and others like it, manufactured using lead free solder will have PbF stamped on the PCB. For service and repair
work we suggest using the same type of solder although, with some precautions, standard Pb solder can also be used.
Caution
• PbF solder has a melting point that is 50°F ~ 70° F (30°C ~ 40°C) higher than Pb solder. Please use a soldering iron with
temperature control and adjust it to 700°F ± 20° F (370°C ± 10°C). In case of using high temperature soldering iron, please
be careful not to heat too long.
• PbF solder will tend to splash if it is heated much higher than its melting point, approximately 1100°F (600°C).
• If you must use Pb solder on a PCB manufactured using PbF solder, remove as much of the original PbF solder as possible
and be sure that any remaining is melted prior to applying the Pb solder.
• When applying PbF solder to double layered boards, please check the component side for excess which may flow onto the
opposite side (See the figure below).
1.1.
Suggested PbF Solder
There are several types of PbF solder available commercially. While this product is manufactured using Tin, Silver, and Copper
(Sn+Ag+Cu), you can also use Tin and Copper (Sn+Cu), or Tin, Zinc, and Bismuth (Sn+Zn+Bi). Please check the
manufacturer’s specific instructions for the melting points of their products and any precautions for using their product with other
materials.
The following lead free (PbF) solder wire sizes are recommended for service of this product: 0.3mm, 0.6mm and 1.0mm.
4
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
1.2.
How to Recognize that Pb Free Solder is Used
(Example: Handset P.C.B.)
Marked
VBATT
TX
CHG2
R352
RX
1
IC241
L352
5
R354
C354
C313
L326
R251 R252
75
51
C205
C204
R204
R203
RSSI
PbF
IC381
IC371
1
D326
C381
D327
IC373
C373
IC374
FL901
CA274
C273
D373
Q331
Q221
Q231
RECEIVER
IC249
L332
CN331
R273
Q373
C335
L334
C321
C334
R324
R325
C322
R323
D324
D323 L331
R272
CA271
(Component View)
Note:
The location of the “PbF” mark is subject to change without notice.
2 FOR SERVICE TECHNICIANS
ICs and LSIs are vulnerable to static electricity.
When repairing, the following precautions will help prevent recurring malfunctions.
2. Ground the soldering irons.
3. Use a conductive mat on worktable.
4. Do not grasp IC or LSI pins with bare fingers.
3 CAUTION
1. Danger of explosion if battery is incorrectly replaced.
2. Replace only with the same or equivalent type recommended by the manufacturer.
3. Dispose of used batteries according to the manufacturer´s Instructions.
IC901
C272
R201
1. Cover plastic parts boxes with aluminum foil.
SHIELD
SP_PHONE
L373
5
PQUP11285Z
C227
R227
C372
R331
R332
C332
ANT
C382
C383
C211
L327
50
IC201
C384
1
C316
R317
C314 R314
C317
R312
R234
26
100
R318
C208
R367
C246 R249
1
25
R334
R366
TXO MOE
C336 R340
C201 C215 C212
C305
C333
5
R225
D361
R333
C307
C202
R228
C231C306
C219
C340
C214
R208
R364 R230
C225 RESET
D231 R222 C222
R362
R224
IC221
R232
C224
R231
X201
C221
R363 R361
1
D223 R223
CHG1
C223
Q361
R351
L211
R368
Q363
L351
Q362
R377
R226
C244
C226
R243 C243
C303 C377
C304
C315 R315
C361
C371
R261
R257
R256
D312
C312
C353
R205
76
Q251 RA251Q252 Q253 R258
D313
C311
R376
Q243
R242
C242
VSS VSS
C241 R209
R241
JTAG
C206
C209 RA201
R207
R206 TEST
A
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
4 OPERATING INSTRUCTIONS
4.1.
Battery
4.1.1.
Battery Installation
4.1.2.
Battery Charge
4.1.3.
Recharging the Battery
Note for service:
The battery strength may not be indicated correctly if the battery is disconnected and connected again, even after it is fully
charged. In that case, by recharging the battery as mentioned above, you will get a correct indication of the battery strength.
4.1.4.
Battery Strength
6
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
4.1.5.
Battery Replacement
4.1.6.
Battery Performance
7
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
4.2.
Location of Controls
4.2.1.
Base Unit
4.2.2.
Handset
8
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
4.2.3.
Charger Unit (KX-TG2822LA only)
9
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
4.3.
Displays
4.3.1.
Display Items
4.3.2.
Troubleshooting (Handset LCD)
10
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
4.4.
4.4.1.
Settings
Connections
11
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
12
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
4.4.2.
Guide to Handset Programming
13
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
4.4.3.
Direct Commands
14
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
4.5.
Troubleshooting
If the handset display shows error messages, see “Troubleshooting (Handset LCD) (P.10)” for the Cause & Solution.
15
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
16
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
17
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
5 DISASSEMBLY INSTRUCTIONS
5.1.
Base Unit
Shown in Fig.1
To Remove Cabinet Cover
Main P. C. Board
Remove Screws (2.6 × 12).....(A) × 4
Screws (2.6 × 8).......(B) × 2
Tapes and Solders
Main P. C. Board
18
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
5.2.
Handset
Shown in Fig.2
3
4
To Remove -
Remove Screws (2 × 10).............( C) × 2
Follow the procedure.
Tape and Solders
Screws (2 × 10).............( D) × 3
Charge Terminals
Main P. C. Board
Cabinet Cover
Main P. C. Board
19
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
5.3.
Charger Unit
Shown in Fig.5
To Remove Cabinet Cover
Main P. C. Board
Remove Screws (2.6 × 12).............( E) × 2
Solders
Main P. C. Board
20
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
6 HOW TO REPLACE THE HANDSET LCD
21
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
7 TROUBLESHOOTING GUIDE
Cross Reference:
Check Power (P.23)
Check Battery Charge (P.24)
Check Link (P.25)
Check the RF part (P.26)
Check Handset Transmission (P.33)
Check Handset Reception (P.33)
Check Caller ID (P.33)
22
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
7.1.
Check Power
Cross Reference:
Note:
DSP is IC501.
Power Supply Circuit (P.54)
Reset Circuit (P.56)
23
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
7.2.
Check Battery Charge
Note:
DSP is IC501.
24
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
7.3.
Check Link
Note:
Cross Reference:
DSP is IC501.
Check the RF part (P.26)
(*1) Refer to Finding out the Defective part (P.26).
25
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
7.4.
Check the RF part
7.4.1.
Finding out the Defective part
After All the Checkings or Repairing
1. Re-register the checked Handset to the checked Base Unit, and Regular HS to Regular BU.
Note:
(*1) HS: Handset
(*2) BU: Base Unit
26
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
7.4.1.1.
Re-registering the Handset
27
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
7.4.2.
RF Check Flowchart
Each item (1 ~ 6) of RF Check Flowchart corresponds to Check Table for RF part (P.29).
Please refer to the each item.
28
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
7.4.3.
Check Table for RF part
No.
Item
1 Link Confirmation Normal
HS, BU Mode [Normal Mode]
2
3
4
5
6
Control signal confirmation
BU (Base Unit) Check
1. Register Regular HS to BU (to be checked).
2. Press [Talk] key of the Regular HS to
establish link.
Check DSP interface. (*2)
HS (HandSet) Check
1. Register HS (to be checked) to Regular BU.
2. Press [Talk] key of the HS to establish link.
Check DSP interface. (*2)
HS, BU Mode: [Test Burst Mode] (*1)
X’tal Frequency confirmation (*7)
Check X’tal Frequency.
Check X’tal Frequency.
(13.824000MHz ±100Hz)
(13.824000MHz ±100Hz)
HS, BU Mode: [Adjustment] (*3)
TX Power confirmation
1. Place the Regular HS about 15cm away
1. Place the HS about 15cm away from the
from the BU.
Regular BU.
Regular HS, BU Mode:
2. Confirm that RSSI of the Regular HS is
2. Confirm that RSSI of the Regular BU is
[RX-CW Mode.] (*4)
approximately 2V by Oscilloscope. (*5)
approximately 2V by Oscilloscope. (*6)
HS, BU (to be checked) Mode:
[Test Burst Mode.] (*1)
RX Sensitivity confirmation
1. Place the Regular HS about 15cm away
1. Place the HS about 15cm away from the
from the BU.
Regular BU.
Regular HS, BU Mode:
2. Confirm that RSSI of the BU is
2. Confirm that RSSI of the HS is
[Test Burst Mode.] (*1)
approximately 2V by Oscilloscope. (*5)
approximately 2V by Oscilloscope. (*6)
HS, BU (to be checked) Mode:
[RX-CW Mode.] (*4)
Range Confirmation Normal
1. Register Regular HS to BU (to be checked).
1. Register HS (to be checked) to Regular BU.
HS, BU Mode: [Normal Mode]
2. Press [Talk] key of the Regular HS to
establish link.
3. Compare the range of the BU (being
checked) with that of the Regular BU.
Note:
(*1)(*3)(*4) ADJUSTMENT AND TEST MODE (P.34)
(*2) RF-DSP Interface Signal Wave Form (P.31)
(*5) Base Unit Reference Drawing (P.43)
(*6) Handset Reference Drawing (P.44)
(*7) X501 (Base Unit), X201 (Handset) Check (P.42)
29
2. Press [Talk] key of the HS to establish link.
3. Compare the range of the HS (being
checked) with that of the Regular HS.
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
7.4.4.
TEST RANGE Check
Circuit block which range is defective can be found by the following check.
Item
Range Confirmation TX
TEST
(TX Power check)
HS, BU Mode:
[Test Link Mode] (*1)
Range Confirmation RX
TEST
(RX sensitivity check)
HS, BU Mode:
[Test Link Mode] (*1)
BU (Base Unit) Check
1. Register Regular HS to BU (to be checked).
HS (HandSet) Check
1. Register HS (to be checked) to Regular BU.
2. Set BU to “Test Link mode”.
2. Set Regular BU to “Test Link mode”.
3. Set Regular HS to “Test Link mode”.
3. Set HS to “Test Link mode”.
*Set TX Power and RX Sensitivity of the BU and the
Regular HS by CHART1.
*Set TX Power and RX Sensitivity of the HS and the
Regular BU by CHART1.
* At distance of about 20m between HS and BU,
Link OK = TX Power of the BU is OK.
No Link = TX Power of the BU is NG.
1. Register Regular HS to BU (to be checked).
* At distance of about 20m between HS and BU,
Link OK = TX Power of the HS is OK.
No Link = TX Power of the HS is NG.
1. Register HS (to be checked) to Regular BU.
2. Set BU to “Test Link mode”.
2. Set Regular BU to “Test Link mode”.
3. Set Regular HS to “Test Link mode”.
3. Set HS to “Test Link mode”.
*Set TX Power and RX Sensitivity of the BU and
Regular HS by CHART1.
* Set TX Power and RX Sensitivity of Checking_HS
and Regular_BU by CHART1.
* At distance of about 20m between HS and BU,
Link OK= RX Sensitivity of the BU is OK.
No Link = RX Sensitivity of the BU is NG.
* At distance of about 20m between HS and BU,
Link OK= RX Sensitivity of the HS is OK.
No Link = RX Sensitivity of the HS is NG
CHART1: Setting of TX Power and RX Sensitivity in Range Confirmation TX TEST, RX TEST
BU (Base Unit) TX Power Check
BU (Base Unit) RX Sensitivity Check
BU (to be checked)
TX Power
RX Sens.
High
High
High
High
TX Power
High
Low
HS (Handset) TX Power Check
HS (Handset) RX Sensitivity Check
HS (to be checked)
TX Power
RX Sens.
High
High
High
High
TX Power
High
Low
Note:
(*1) ADJUSTMENT AND TEST MODE (P.34)
30
Regular_HS
RX Sens.
Low
High
Regular_BU
RX Sens.
Low
High
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
7.4.5.
RF-DSP Interface Signal Wave Form
<Test Burst Mode>
31
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
<Test Burst Mode>
32
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
7.5.
Check Handset Transmission
Cross Reference:
SIGNAL ROUTE (P.69).
7.6.
Check Handset Reception
Cross Reference:
SIGNAL ROUTE (P.69).
Note:
When checking the RF part, Refer to Check the RF part
(P.26)
7.7.
Check Caller ID
Cross Reference:
Telephone Line Interface (P.57).
Calling Line Identification (Caller ID) (P.59).
Note:
• Make sure the format of the Caller ID service of the
Telephone company that the customer subscribed to.
• Also we recommend to confirm that the customer is
really a subscriber of the service.
33
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
8 ADJUSTMENT AND TEST MODE
8.1.
8.1.1.
Test Mode Flow Chart for Base Unit
Test Burst Mode
Note:
(*1) When you check test mode, connect to the external Buttons because Base Unit has only LOCATOR key. Refer to “For Test
Mode” in Base Unit Reference Drawing (P.43). -Insert AC adaptor during checking.
(*2) Refer to Check Table for RF part (P.29) and RX-CW Test Mode (P.39) for proper Handset Settings.
(*3) Press LOCATOR1 for KX-TG2822LA.
34
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
8.1.2.
RX-CW TEST Mode
Note:
(*1) When you check test mode, connect to the external Buttons because Base Unit has only LOCATOR key. Refer to “For Test
Mode” in Base Unit Reference Drawing (P.43). -Insert AC adaptor during checking.
(*2) Refer to Check Table for RF part (P.29) and Test Burst Mode (P.38) for proper Handset Settings.
(*3) Press LOCATOR1 for KX-TG2822LA.
35
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
8.1.3.
Test Link Mode
Note:
(*1) When you check test mode, connect to the external Buttons because Base Unit has only LOCATOR key. Refer to “For Test
Mode” in Base Unit Reference Drawing (P.43). -Insert AC adaptor during checking.
(*2) for factory use only
(*3) Refer to Check Table for RF part (P.29) and Test Link Mode (P.40) for proper Handset Settings.
(*4) Press LOCATOR1 for KX-TG2822LA.
36
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
8.1.4.
Adjustment Mode
Cross Reference
Check and Adjust X501 (Base Unit) Frequency (P.42)
Note:
(*1) When you check test mode, connect to the external Buttons because Base Unit has only LOCATOR key. Refer to “For Test
Mode” in Base Unit Reference Drawing (P.43). -Insert AC adaptor during checking.
(*2) Refer to the table below, if using Spectrum Analyzer for checking.
BCK
13.824 MHz
±30 Hz
±100 Hz
→
→
→
TEST MODE Frequency (1 Channel)
2401.618359 MHz
±5.20 kHz
±17.36 kHz
(*3) Press LOCATOR1 for KX-TG2822LA.
37
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
8.2.
8.2.1.
Test Mode Flow Chart for Handset
Test Burst Mode
Note:
(*1) LCD displays the Channel number.
(exception: default/ CH00 = 1ch.)
(*2) Refer to Check Table for RF part (P.29) and RX-CW TEST Mode (P.35) for proper Base Unit Settings.
38
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
8.2.2.
RX-CW Test Mode
Note:
(*1) LCD displays the Channel number.
(exception: default/ CH00 = 1ch.)
(*2) Refer to Check Table for RF part (P.29) and Test Burst Mode (P.34) for proper Base Unit Settings.
39
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
8.2.3.
Test Link Mode
Note:
(*1) LCD displays the Channel number.
(exception: default/ CH00 = 1ch.)
(*2) for factory use only.
(*3) Refer to Check Table for RF part (P.29) and Test Link Mode (P.36) for proper Base Unit Settings.
40
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
8.2.4.
Adjustment Mode
Cross Reference
(*1) Adjust Battery Low Detector Voltage (Handset) (P.42)
Note:
(*2) These are the default values.
(*3) These values may not be fixed depending on the battery strength.
(*4) Refer to the table below, if using Spectrum Analyzer for checking.
BCK
13.824 MHz
±30 Hz
±100 Hz
→
→
→
TEST MODE Frequency (1 Channel)
2401.618359 MHz
±5.20 kHz
±17.36 kHz
41
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
8.3.
X501 (Base Unit), X201 (Handset) Check
Equipment: Frequency counter
Check Point for measurement: BCK
Checking tolerance: 13.824MHz ± 100Hz (Base Unit/Handset)
8.3.1.
Check and Adjust X501 (Base Unit) Frequency
1. Set up Base Unit in TEST mode.
2. Press following keys in order to Adjust Crystal mode. [LOCATOR] (*1), [LOCATOR] (*1), [LOCATOR] (*1), [Button 1] (*2),
[Button 2] (*2), [Button 2] (*2), [Button 1] (*2). Check BCK frequency.
3. If the BCK frequency is out of the checking tolerance (± 100Hz), adjust to Adjustment tolerance (± 30Hz) by pressing [Button
1] (*2) or [Button 2] (*2) key.
Adjustment Tolerance: 13.824MHz ± 30Hz
4. Press [LOCATOR] (*1) key to write the new frequency factor in Memory.
5. Turn the power off. Then this value is available.
Note:
(*1) Press LOCATOR1 for KX-TG2822LA.
(*2) When you check test mode, connect to the external Buttons because Base Unit has only LOCATOR key. Refer to “For Test
Mode” in Base Unit Reference Drawing (P.43). -Insert AC adaptor during checking.
Cross Reference:
Adjustment Mode (P.37)
8.3.2.
Check and Adjust X201 (Handset) Frequency
1. Set DC power supply to 2.6V.
2. Set up Handset in TEST mode (Adjustment flow).
3. Press [1] key to Adjust Crystal mode. (“Clock Adj.” is displayed on LCD). Check BCK frequency.
4. If the BCK frequency is out of the checking tolerance (± 100Hz), adjust to Adjustment tolerance (± 30Hz) by pressing [ ] or [ ]
key.
Adjustment Tolerance: 13.824MHz ± 30Hz
5. Press [TALK] key to write the new frequency factor in EEPROM.
6. Turn the power off. Then this value is available.
Cross Reference:
Adjustment Mode (P.41)
8.4.
Adjust Battery Low Detector Voltage (Handset)
After Handset´s DSP (IC201) or EEPROM (IC241) replacement, Re-writing Battery Low voltage to EEPROM is required.
With following Handset Adjustment Flow, adjust DC power supply and DC voltmeter by the procedure below.
1. Set DC power supply to 2.6V.
2. Set up Handset in TEST mode (Adjustment flow).
3. Press [1] key and [OFF] key to Adjust Batt Low mode. (“Bat Adj.” is displayed on LCD)
4. Change the voltage of the DC power supply to 2.33V accurately. Check the voltage at P.C. board pads because some voltage
drops occur due to the usage of long or thin cables.
5. Press [TALK] key to write voltage value in EEPROM.
6. Turn the power off. Then this value is available.
Note:
Refer to Handset Reference Drawing (P.44) for connection of DC power supply and voltmeter.
Cross Reference:
Adjustment Mode (P.41)
42
Base Unit Reference Drawing
43
IC501
pin100
Oscilloscope
INT_1
W_GND
INT1
C201
R671
R670
1
C611
R593
R668
R612
R594
R669
R611
R687
R686
C612 C685
IC611
C365
C377
C504
C505 C352
R473 R474
C471 C472
31
C660
C512
C120
R134
D133
C515
C516
C513
C174
C172
STB2
CN661
STB4
C179 R178 C178
STB1 STB3
C182 R171 C175
STB_A
GND
TEST_SW
For Test Mode
KIN3 KIN1
KIN2
C176
C173 R175 C551
Q171
C167
C524
C522
R167 R172 R176
C181 C171 C177
C347
C517 C508 C509
R137
D131
R136
R524
C525
R525
R523
R522 Q521
R141
R143
Q131
C132
R133
R132
C141
R157
C101
D142
R156
R111
P101
SA101
SA104
L300
IC901
SHIELD
C121
BMC-CLK
(BCK)
R121
R112
C122
C305
C306
Frequency Counter (*1)
Q111
C111
C112
C113
D113
C122
L102
L101
C142
R113
C102
D101
R145
R142
R131
C165
R151
KIN1
Button1
KIN2
Button2
KIN3
Button3
(*1) is referred to No.3 of Check Table for RF part (P.29)
C202
R203
R204
R205
C503
C680
R680
R591
R592
R114
R533
X501
Q143
R164
R517 R509 C521 R521
C514
C518
C342
C184
C183
R183
C166
R166
L401
L901
C379
C381
C301
DCM
C380
ANT
D301
C303
PbF
INT0
IC501
50
R421
R206
R422
C422
C343 IC332
1 RDY R601 R602
C421
C601
R675
C677
R423
C603
R677
C423
R679
C501 C675
L501 C679
C341
S662
R163
C163
R165
L402
D472
SA102 SA103
IO1
Q201 R202
R201
Q202
IC201
C663 81
C665
C667
C669
C671
C459
C456 C458 R460
C457 R459
R161
R160
C162
LED677
SP
D471
Oscilloscope
IC301
RA500
C664
C666
C668
C670
C672
RA501
IC601
14
R454
C455
C454
C161
R184
R185
C185
R162
C160
R168
Q141
28
15
C373
C661
J600
J601
C662
L371
S661
Q142
MIM
MIC
C453 R453
Q371
C371
L361
CHG
Q156
Note:
AF
OSC
Q373
R373
R372
R371
R374
R375
LED679
Q372
R361
D371
D361
Q161
MIP
R364
C361
R365
Q361
D362
Q362
8
SP
AC VOLT
METER
IC331
MIC
R342 R343
Q340
R341
R340
DC_VOLT_METER
RSSI (RS)
Oscilloscope
When connecting the Simulator Equipments for checking, please refer to below.
8.5.
A
DCP
DC
DC
9V
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
PQUP11286Z
CN101
Handset Reference Drawing
44
R376
R351
L351
R377
C353
L352
R226
C226
R243 C243
C303 C377
C304
C315 R315
C244
5
TX
RX
VSS VSS
C241 R209
R241
VBATT
R205
76
75
JTAG
C206
C209 RA201
R207
R206 TEST
IC201
R251 R252
51
50
C311
D312
D313
Q221
Q231
Q361
Q363
Q362
Oscilloscope
RSSI
(pin 4)
150
HS_SP
MAIN_SP
Oscilloscope
CN331
PbF
1
C272
CA271
R272
R273
C273
CA274
C227
R227
IC374
C382
C383
C335
L334
C321
C334
R324
R325
C322
R323
D324
D323 L331
Q373
IC373
L373
IC381
C381
C384
Oscilloscope
D373
Q331
C373
C211
C361
L332
R331
R332
C332
C372
IC371
1
C371
8
AF VOLT
METER
SP_PHONE
Frequency
Counter (*1)
BCK
R201
D327
D326
L327
C205
C204
R204
R203
RSSI
L326
L211
R257
R256
R261
SP_PHONE
Q251 RA251Q252 Q253 R258
CI
(pin79)
IC249
C316
R317
C314 R314
C312
C317
R368
R312
R234
26
100
R318
C208
R367
C246 R249
1
25
R334
R366
TXO MOE
C336 R340
C201 C215 C212
C305
C333
5
R225
D361
R333
C307
C202
R228
C231C306
C219
C340
C214
R208
R364 R230
RESET
C225
C222
R222
D231
R362
R224
IC221
R232
C224
R231
X201
C221
R363 R361
1
D223 R223
CHG1
C223
C313
IC241
R354
C354
R242
C242
1
CHG2
VSS1
Oscilloscope
AC VOLT
METER
MONITOR_SP
RECEIVER
Note: (*1) is referred to No.3 of Check Table for RF part (P.29)
47 MICM
MICP
R352
VSS2
Q243
MIC Load
OSC
1.1KHz
47
DC_POWER_SUPPLY
2.6V 2.33V
VBATT2
VBATT1
2.3~2.90V
(Battery)
DC_VOLT_METER
When connecting the Simulator Equipments for checking, please refer to below.
8.6.
ANT
FL901
IC901
PQUP11285Z
A
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
SHIELD
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
8.7.
Channel
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
Frequency Table
TX/RX Frequency
(MHz)
2401.808203
2402.698096
2403.591943
2404.481836
2405.375684
2406.265576
2407.159424
2408.049316
2408.943164
2409.833057
2410.726904
2411.616797
2412.510645
2413.400537
2414.294385
2415.184277
2416.078125
2416.968018
2417.861865
2418.751758
2419.645605
2420.535498
2421.429346
2422.319238
2423.213086
2424.102979
2424.996826
2425.886719
2426.780566
2427.670459
2428.564307
2429.454199
2430.348047
2431.237939
2432.131787
2433.021680
2433.915527
2434.805420
2435.699268
2436.589160
2437.483008
2438.372900
2439.266748
2440.156641
2441.050488
2441.940381
2442.834229
2443.724121
2444.617969
2445.507861
2446.401709
2447.291602
2448.185449
2449.075342
2449.969189
2450.859082
2451.752930
2452.642822
2453.536670
2454.426563
2455.320410
2456.210303
2457.104150
2457.994043
TEST MODE Frequency
(MHz)
2401.618359
2402.508252
2403.402100
2404.291992
2405.185840
2406.075732
2406.969580
2407.859473
2408.753320
2409.643213
2410.537061
2411.426953
2412.320801
2413.210693
2414.104541
2414.994434
2415.888281
2416.778174
2417.672021
2418.561914
2419.455762
2420.345654
2421.239502
2422.129395
2423.023242
2423.913135
2424.806982
2425.696875
2426.590723
2427.480615
2428.374463
2429.264355
2430.158203
2431.048096
2431.941943
2432.831836
2433.725684
2434.615576
2435.509424
2436.399316
2437.293164
2438.183057
2439.076904
2439.966797
2440.860645
2441.750537
2442.644385
2443.534277
2444.428125
2445.318018
2446.211865
2447.101758
2447.995605
2448.885498
2449.779346
2450.669238
2451.563086
2452.452979
2453.346826
2454.236719
2455.130566
2456.020459
2456.914307
2457.804199
Channel
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
45
TX/RX Frequency
(MHz)
2458.887891
2459.777783
2460.671631
2461.561523
2462.455371
2463.345264
2464.239111
2465.129004
2466.022852
2466.912744
2467.806592
2468.696484
2469.590332
2470.480225
2471.374072
2472.263965
2473.157813
2474.047705
2474.941553
2475.831445
2476.725293
2477.615186
2478.509033
2479.398926
2480.292773
2481.182666
TEST MODE Frequency
(MHz)
2458.698047
2459.587939
2460.481787
2461.371680
2462.265527
2463.155420
2464.049268
2464.939160
2465.833008
2466.722900
2467.616748
2468.506641
2469.400488
2470.290381
2471.184229
2472.074121
2472.967969
2473.857861
2474.751709
2475.641602
2476.535449
2477.425342
2478.319189
2479.209082
2480.102930
2480.992822
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
8.8.
How to Clear User Setting (Handset Only)
Units are reset to the Factory settings by this operation (Erase stored Phone numbers, Caller list and etc.).
This operation should not be performed for a usual repair.
Note:
(*1) Be sure to short the battery terminals of the Handset with a lead wire, etc. for 2 seconds for discharge after removing the
battery.
46
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
9 DESCRIPTION
9.1.
Frequency
The frequency range of 2.4GHz-2.48GHz is used. Transmitting and receiving channel between Base Unit and Handset is same
frequency. Refer to Frequency Table (P.45).
9.2.
FHSS (Frequency Hopping Spread Spectrum)
This telephone is using an IC chip which has similar specification to WDCT (World Digital Cordless Telephone) and is the
telephone system that can use multiple portable unit simultaneously. The explanation of this system is mentioned below. This
system uses a Time Division Multiple Access/Time Division Duplex (TDMA/TDD) scheme:
transmitting and receiving frequencies of the Base Unit and Handset are shared in the same frequency. The construction of
RX/TX frequency data is shown below. It consists of 4 slots from the Base Unit to the Handset, and 4 slots from the Handset
to the Base Unit, total 8 slots in 10ms. By this slot system, simultaneous air link and communication between 4 Handsets and
the Base Unit can be realized. One communication between Handset and the Base Unit is done by one slot from the Base Unit
to Handset, and another slot from Handset to the Base Unit.
DSS makes spectrum spread by multiplying carrier signal by PN code. The purpose to make spectrum spread is to reduce
power density per time and per band. On the other hand, FHSS makes spectrum spread by changing channel every 10ms
according to Hopping table. Also the purpose to make spectrum spread is to reduce power density per time and per band.
47
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
9.2.1.
TDD Frame Format
Sync Field (72bit): Preamble 56bit + SyncWord 16bit
Base Unit (Handset) adjusts the timing of reception so that reception of Base Unit (Handset) can correspond to transmission
of Handset (Base Unit).
It is necessary for sync-field that Handset gets synchronization.
A - field (64bit): Each kinds of DATA: ch data, line condition, etc.
B - field (320bit + 80bit): Sound data + parity
Z - field (4bit): Parity Check
9.2.2.
TDMA system
This system is the cycles of 10ms, and has four duplex paths,
so it is possible to perform four duplex communications simultaneously.
In 1 slot 1.25ms, the 10ms of voice data is transmitted.
Each slot makes every frame frequency hop. (100hops/sec.)
Although each slot (UpLink3 and UpLink4) uses different frequency, UpLink3 and DownLink3 use the same frequency.
• Handset Link
Traffic Bearer
A link is established between Base Unit and Handset.
The state where duplex communication is performed.
The hopping pattern of a 3000hops (30 seconds) cycle.
Dummy Bearer
The Base Unit sends Dummy-data to the all stand-by state Handsets.
The Handsets receive that data for keeping synchronization and monitoring request from the Base Unit.
Dummy Bearer doesn´t contain B-field (sound) data.
48
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
9.3.
Signal Flowchart in the Whole System
Reception
CN101 of the Base Unit is connected to the TEL line, and signal is enter through the bridge diode D101. While talking, the relay
(Q141) is turned ON and amplified at the Q171, then led to DSP (IC501). The DSP encodes ADPCM and TDD/TDMA with
FHSS to TX-DATA. The TX-DATA signal is enter to IC901 of RF PART, and modulated to 2.4GHz. The RF signal is fed into
Tx/Rx switch (D904). The RF signal is passed through filter (FL901) and fed to ANTENNA.
As for the Handset, RF signal from the antenna passes through filter (FL901), then is routed by Tx/Rx switch (D904) and led
to IC901. The RF signal is amplified by LNA and down-converted to IF signal in IC901. The IF signal passing through internal
filter is demodulated into RXDATA, then enter to DSP (IC201). The DSP performs TDD/TDMA and ADPCM decoding to convert
the RXDATA into the voice signal, then it is output to the speaker.
Transmission
The voice signal entering from the Handset microphone is led to DSP (IC201). The DSP encodes ADPCM and TDD/TDMA with
FHSS to TX-DATA. The TX-DATA signal enters to IC101 of RF PART, and is modulated to 2.4GHz. The RF signal is fed into
Tx/Rx switch (D904). The RF signal is passed through filter (FL901) and fed to ANTENNA.
As for the Base Unit, RF signal from the antenna passes through filter (FL901), then is routed by Tx/Rx switch (D904) and led
to IC901. The RF signal is amplified by LNA and down-converted to IF signal in IC901. The IF signal passing through internal
filter is demodulated into RXDATA, then enter to DSP (IC501). The DSP performs TDD/TDMA and ADPCM decoding to convert
the RXDATA into the voice signal. The voice signal is amplified at the TX amplifier (Q161), then output to the TEL line CN101
through the relay (Q141) and bridge (D101).
49
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
10 EXPLANATION OF LINK DATA COMMUNICATION
10.1. Calling
10.2. To Terminate Communication
10.3. Ringing
50
RF_PART
VBATT2
OSC_IN
SDIO
SDATA
SCLK
SLE
RX_GAIN
RX_EN
TX_EN
SHCTRL
RF_RESET
RSSI
MOD_EN
RXDATA
TXDATA
OSC
AMP
KEYA, B
51
KEY1
EEPROM
IC611
WP, CLK
DATA
Q521
VCC
X501
13.824MHz
DSP
IC501
INT_1 5
INT_1
ANT
CHG_LED
LOUT
LIN
RLY
RLY
DCIN
BELL
HSMIN
HSMIP
VCC
VRCCR
VCCA
VCCPA
POWER_DOWN
RESET
CHG_CTL
CHG
KEY
IN_USE_LED
11 BLOCK DIAGRAM (BASE UNIT_MAIN)
RECEIVE
AMP
Q171
SIDE TONE
CIRCUIT
Q161
2.7V
RESET
IC332
CHARGE
DETECT
Q361 Q362
BELL
DETECT
Q111
D101
CHARGE
CONTROL
Q371,Q372
-
+
CHARGE_CONTACT
DC TEL JACK
DC-
DC+
Ring
Ti p
CN101
KX-TG2820/2822 BLOCK DIAGRAM (Base Unit_Main)
2.5V
REGULATOR
IC301
3.3V
REGULATOR
IC331
INUSE
DETECT
R131,R132
RLY
Q141
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
ANTENNA
FL901
D903,D904
52
Slicer
TC_CTRL
RSTN
RXEN
RXGAIN
SHCTRL
RF_RESET
RX_EN
RX_GAIN
RX_DATA
RSSI
TX_DATA
TX_EN
OSC_IN
SCLK
SLE
SDATA
SDIO
VBATT2
MOD_EN
DSP
KX-TG2820/2822 BLOCK DIAGRAM (Base Unit_RF Part)
FM
det.
IC901
VCC
2.4GHz Mod/Demod Circuit
2MHz
XIN
Frac-N
PLL
TXEN
2.4GHz
2.4GHz
Serial
Interface
12 BLOCK DIAGRAM (BASE UNIT_RF PART)
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
13 CIRCUIT OPERATION (BASE UNIT_MAIN)
General Description:
(DSP, EEPROM) is a digital speech/signal processing system that implements all the functions of speech compression and
memory management required in a digital telephone.
The DSP system is fully controlled by a host processor DSP. The host processor provides activation and control of all that
functions as follows.
13.1. DSP (Digital Speech/Signal Processing: IC501)
• DTMF Detection/Generator
The DTMF detection is implemented by the DSP system in software. The DTMF detection is performed during Line Monitoring
modes of operation.
When the DTMF data from the Handset is received, the DTMF signal is output.
• Caller ID demodulation
The DSP implements monitor and demodulate the FSK signals that provide CID information from the Central Office.
• Analog Switching
The voice signal from telephone line is transmitted to the speaker or the voice signal from speakerphone microphone is
transmitted to the Telephone line, etc. They are determined by the signal path route operation of voice signal.
• Block Interface Circuit
RF part, LED, Key scan, Telephone line.
13.2. EEPROM (IC611)
Following information data is stored.
• Settings
ex: ID code, Recall Time, Tone/Pulse
53
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
13.3. Power Supply Circuit
Function:
The power supply voltage from AC adaptor is converted to the desired voltage of each block.
Circuit Operation:
• IC301: 2.5V Regulator
• IC331: 3.3V Regulator
54
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
13.3.1. Charge Circuit
The voltage from the AC is supplied to the charge circuits. Main charge (180mA at the Battery) of maximum 6-hours is started
soon after the Handset is placed on the Base Unit. Then it changes to Trickle charge to prevent from overcharging.
Q361 and Q362 detect the ON-HOOK state (Handset is placed on Base Unit).
Q371 and Q372 control the charge current.
55
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
13.4. Reset Circuit
Function:
This circuit is used to initialize the microcomputer when it incorporates an AC adaptor.
Circuit Operation:
When the AC Adaptor is inserted into the unit, then the voltage is shifted by IC331 and power is supplied to the DSP.
The set starts to operate when VCC goes up to 2.7V or more in the circuit voltage diagram.
Note:
(*1) The initializing time of the DSP chip is 26.6ms under normal conditions.
56
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
13.5. Telephone Line Interface
Telephone Line Interface Circuit:
Function
• Bell signal detection
• ON/OFF hook and pulse dial circuit
• Side tone circuit
Bell signal detection and OFF HOOK circuit:
In the idle mode, Q141 is open to cut the DC loop current and decrease the ring load. When ring voltage appears at the Tip (T)
and Ring (R) leads (When the telephone rings), the AC ring voltage is transferred as follows:
T → L101 → R111 → C111 → Q111 → DSP pin 3 [BELL]
When the CPU (DSP) detects a ring signal, Q141 turns on, thus providing an off-hook condition (active DC current flow through
the circuit). Following signal flow is the DC current flow.
T → L101 → D101 → Q141 → Q161 → R163 → D101 → L102 → P101 → R
ON HOOK Circuit:
Q141 is open, Q141 is connected as to cut the DC loop current and to cut the voice signal. The unit is consequently in an onhook condition.
Pulse Dial Circuit:
Pin 4 of DSP turns Q141 ON/OFF to make the pulse dialing.
Side Tone Circuit:
Basically this circuit prevents the TX signal from feeding back to RX signal. As for this unit, TX signal feed back from Q161 is
canceled by the canceller circuit of DSP.
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KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
13.6. Parallel Connection Detect Circuit
Function:
This circuit determines whether the telephone connected in parallel is on hook or off hook by detecting changes in the T/R
voltage.
Circuit Operation:
Parallel connection detection when on hook:
When on hook Q136 is ON, the voltage is monitored pin 35 of IC501. There is no parallel connection if the voltage is 1.65 V
or higher, while a parallel connection is deemed to exist if the voltage is lower.
Parallel connection detection when off hook:
When off hook Q136 is OFF, the voltage is monitored pin 35 of IC501; the presence/absence of a parallel connection is
determined when the voltage changes by 0.2 V or more.
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KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
13.7. Calling Line Identification (Caller ID)
Function:
The caller ID is a chargeable ID which the user of a telephone circuit obtains by entering a contract with the telephone company
to utilize a caller ID service. For this reason, the operation of this circuit assumes that a caller ID service contract has been
entered for the circuit being used.
The Caller-ID data from exchange is supplied to the telephone using either method of FSK or DTMF. The method is chosen
according to the exchange of telephone office. This unit is available to receive the data with both methods and displays the
received data on LCD.
• FSK (Frequency Shift Keying) format
• DTMF format
It is the method to send the telephone number of calling party with DTMF to the telephone. DTMF is sent before the first bell
signal.
The data is sent in turn; first the start code, secondly the telephone number of calling party, lastly end code.
The DTMF is chosen from A (1633Hz and 697Hz), B (1633Hz and 770Hz), C (1633Hz and 852Hz) and D (1633Hz and 941Hz)
as the start code and end code according to the exchange.
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KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
13.8. 2.4GHz Mod/Demod Circuit (Base Unit RF Part)
IC901 incorporates all of the modulation and demodulation functions. TX Digital data (TX_DATA) from DSP is supplied to pin 27
of IC901, and then 2.4GHz TX modulated signal is output from pin1. This TX signal is filtered by BPF (FL901) and supplied to
Antenna. 2.4GHz RX signal from the Antenna is filtered by BPF (FL901) and supplied to pin4 of IC901, then demodulated signal
(RX_DATA) comes out from pin 16. At the same time, RSSI (Received Signal Strength Indicator) outputs from pin 14. Reference
clock (13.824MHz) from DSP block is supplied to pin 11 of IC901. VBATT2 supplies 2.5V regulated voltage.
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KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
14 BLOCK DIAGRAM (HANDSET_MAIN)
IC241
ANT
X201
13.824MHz
EEPROM
Q231
CHG_DET
Q361
Q362, Q363
CHG_CTL
CHARGE
CONTROL
CHARGE
D361
WP, SCL, SDA
CHARGE
DETECT
MOD_EN
SDIO
SDATA
SCLK
SLE
RX_GAIN
RX_EN
TX_EN
SHCTRL
RF_RESET
RSSI
RESET
IC374
POWER DOWN
PDN
IC371
2.6V
REGULATOR
VCC
VCCR
VCCA
VCCPA
VBATT2
IC201
MIC
MIP
MIN
DSP
SP
3.0V
CONVERTOR
LOUTO (SP)
CI
IC381
SPOUTP
SPOUTN
AGPIO0
LCD
KEYIN_1~5
ANT_LIGHT
Monitor SP
KEYSTOROBE_A~F
HSSPOUT
LCD_LIGHT
IC373, Q373
RF part
IC221, Q221
RESET
BATTERY
OSC_IN
TX_DATA
RX_DATA
KEYS
2.5V
REGULATOR
KX-TGA243/246 BLOCK DIAGRAM (Handset)
61
ANTENNA
FL901
D903,D904
XIN
Frac-N
PLL
62
FM
det.
Slicer
TC_CTRL
RSTN
RXEN
RXGAIN
SHCTRL
RF_RESET
RX_EN
RX_GAIN
RX_DATA
RSSI
TX_DATA
TX_EN
OSC_IN
SCLK
SLE
SDATA
SDIO
VBATT2
MOD_EN
DSP
KX-TGA243/246 BLOCK DIAGRAM (Handset_RF Part)
IC901
VCC
2.4GHz Mod/Demod Circuit
2MHz
Serial
Interface
TXEN
2.4GHz
2.4GHz
15 BLOCK DIAGRAM (HANDSET_RF PART)
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
16 CIRCUIT OPERATION (HANDSET)
16.1. Construction
The circuit mainly consists of DSP and RF part as shown in the block diagram.
16.1.1. DSP: IC201
Function
• Battery Low, Power down detect circuit
• Ringer Generation
• Interface circuit
RF part, Speaker, Mic, LED, Key scan, LCD, Headset
Initialize
Note:
(*1) The initializing time of the DSP chip is 20ms under normal conditions.
16.1.2. RF part
Mainly voice signal is modulated to RF, or it goes the other way.
16.1.3. EEPROM: IC241
All setting data is stored.
ex: ID code, user setting (Phonebook, Caller ID data)
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KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
16.2. Power Supply Circuit
Voltage is supplied separately to each block.
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KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
16.3. Charge Circuit
When the Handset is put on the cradle of the Base unit or the optional charger, the power is supplied from CHARGE+ and
CHARGE- terminals to charge the battery via R368 or Q361 and D361. The voltage between CHARGE+ and CHARGE- flows
R231 → Q231 → pin38 of IC201, where the charge is detected. Then IC201 calculates the battery consumption amount from
the previous charge, and it controls Q361/Q362/Q363 by pin80 of IC201 until charging is complete. When charging is complete,
the control pattern is switched to Trickle charging form from Operational charging form.
16.4. Ringer and Handset SP-Phone
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KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
16.5. Sending Signal
The voice signal from the microphone is input to DSP (90, 91). Also the power for the microphone is supplied from DSP (92)
and the power is turned OFF on standby.
16.6. Reception Signal
The voice signal from the Base Unit is output to DSP (98) (HSSPOUT). This signal is led to C335. The signal and the other
signal output from DSP (97) drives the speaker.
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KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
16.7. 2.4GHz Mod/Demod Circuit (Handset RF Part)
IC901 incorporates all of the modulation and demodulation functions. TX Digital data (TX_DATA) from DSP is supplied to pin 27
of IC901, and then 2.4GHz TX modulated signal is output from pin1. This TX signal is filtered by BPF (FL901) and supplied to
Antenna. 2.4GHz RX signal from the Antenna is filtered by BPF (FL901) and supplied to pin4 of IC901, then demodulated signal
(RX_DATA) comes out from pin 16. At the same time, RSSI (Received Signal Strength Indicator) outputs from pin 14. Reference
clock (13.824MHz) from DSP block is supplied to pin 11 of IC901. VBATT2 supplies 2.5V regulated voltage.
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KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
17 CIRCUIT OPERATION (CHARGER UNIT)
The voltage from the AC is supplied to the charge circuits. Main charge (165mA at the Battery) of maximum 6-hours is started
soon after the Handset is placed on the charger unit. Then it changes to Trickle charge (average 10mA at the Battery) to prevent
from overcharging.
Charging form
Q4 detects charging (Handset is placed on the charger unit), then Q5 turns ON and LED1 lights up.
Q2 and Q3 regulate the charge current.
The route for this is as follows: DC+pin of CN1→D1→IC1→D2→CHARGE+pad→Handset→CHARGE-pad→Q2→R4 and R9
and R10→DC-pin of CN1.
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KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
18 SIGNAL ROUTE
Each signal route is as follows.
RF part signal route
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KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
19 CPU DATA (BASE UNIT)
19.1. IC501
PIN
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
Description
LINE_SZ
NOT_RLY
BELL
RLY
AC_DOWN_DET
NC
NC
KEY_STB_ D
KEY_STB_ C
KEY_STB_ B
KEY_STB_ A
CHG_CTR
CHG_DET
VCC
GND
EROM_WP
EROM_DATA
EROM_CLK
KEY_IN_ 3
KEY_IN_ 2
KEY_IN_ 1
NC
SYN_DATA
SYN_LE1
SYN_CLK
SYN_DI
NC
GND
SPOUTP
GNDPA
SPOUTN
VCCPA
HSSPOUT
LOUT0
DCIN0
LIN0
VCCA
GNDA
HSMIP
HSMIN
VREF
MIN
MIP
GNDR
TXMOD
VREFR
RSSI
VCCR
GNDPLL
VCCPLL
XOUT
XIN
GND
Reset
Power Down
I/O
D.O
D.O
D.I
D.O
D.I
D.O
D.O
D.O
D.O
D.O
D.O
D.O
D.I
VCC
GND
D.O
D.I.O
D.O
D.I
D.I
D.I
D.O
D.O
D.O
D.O
D.I
D.O
GND
A.O
GND
A.O
VCC
A.O
A.O
A.I
A.I
VCC
A.I
A.I
A.I
A.O
A.I
A.I
GND
A.O
A.O
A.I
VCC
GND
VCC
A.O
A.I
GND
D.I
D.I
High
On
On Hook
OFF
Off Hook
High
--Active
Active
Active
Active
No Charge
Off Charge
VCC
-WP
High
High
Non
Non
Non
-High
Not
High
High
--
High_Z
-------Not
Not
Not
Not
-----------------
Normal
Normal
---
56
57
58
59
60
61
62
NC
TX_OUT
MOD_EN
NC
NC
NC
NC
D.O
D.O
D.O
D.O
D.O
D.O
D.O
-High
Active
-----
--------
Low
Off
Off Hook
ON
On Hook
Low
------Charge
On Charge
-GND
Write
Low
Low
Key In
Key In
Key In
-Low
Active
Low
Low
--
PIN
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
Description
RXEN
TXEN
RXGAIN
RXI
CHG_LED
INUSE_LED
NC
RF_RST
RADIO_EN
GND
VCC
SHCTRL
NC
TCK
TMS
TDI
TD0
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
UART_TX
UART_RX
INT0
NC
GND
VCC
NC
NC
INT_1
I/O
D.O
D.O
D.O
D.I
D.I.O
D.I.O
D.O
D.O
D.O
GND
VCC
D.O
D.O
D.O
D.I
D.O
D.O
D.O
D.O
D.O
D.O
D.O
D.O
D.O
D.O
D.O
D.O
D.O
D.O
D.O
D.I
D.O
D.O
GND
VCC
D.O
D.O
D.O
High
Active
Active
High
High
---Normal
Active
-VCC
Active
-----------------High
High
---VCC
----
High_Z
----Off
Off
---------------------------------
Low
Off
Off
Low
Low
On
On
-WakeUp
Not
GND
-Not
-----------------Low
Low
--GND
-----
Note:
• Data in the blank columns are omitted because of the
Analog I/O.
Reset
Power
Down
-Low
Not
-----
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KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
20 CPU DATA (HANDSET)
20.1. IC201
PIN
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
Description
GNDPA
SPOUTP
BCLK
RSSI
XIN
XOUT
VDD
VCCIN
GND
GND
DCIN0
DCOUT
RESET
(FLASH _RESET)
(FLASH_SO)
(FLASH_SI)
(FLASH_CS)
NC
SERIAL DI
TX OUT
MOD_EN
NC
NC
RF RESET
NC
SHCTRL
NC
GND
VCC
SERIAL_LE
SERIAL_CLK
SERIAL_DATA
RXEN
TXEN
RXGAIN
RXI
NC
CHARGE_DET
OSC_Buf
EEPROM_DET
NC
NC
NC
DOT_LCD_D7
DOT_LCD_D6
DOT_LCD_D5
DOT_LCD_D4
GND
VCC
DOT_LCD
_RESET
(FLASH_SCK)
NC
LED_BL1
LED_BL2
LED_BL3
DOT_LCD_RS
DOT_LCD
_RW_WR
DOT_LCD _E_RD
DOT_LCD
_POWER_SW
ANT_LED
I/O
High
GND
-A.O
-A.O
-A.I
-A.I
-A.O
-VDD
-VCC
VCC
GND
-GND
-A.I
-A.O
-D.I
Normal
D.O
-D.O
-D.O
High
D.O
-D.O
-D.I
High
D.O
High
D.O
On
D.O
-D.O
-D.O
Normal
D.O
-D.O
On
D.O
-GND
-VCC
VCC
D.O
High
D.O
High
D.I
High
D.O
Active
D.O
Active
D.O
High
D.I
-D.O
-D.I Off Charge
D.O
-D.O
64K
D.O
-D.O
-D.O
-D.O
High
D.O
High
D.O
High
D.O
High
GND
-VCC
VCC
D.O
Normal
High_Z
---------------------------------------------------
Low
GND
-------GND
GND
--Reset
Normal
Normal
Low
Normal
Normal
Low
Low
Off
Normal
Normal
Reset
Normal
Off
Normal
GND
-Low
Low
Low
Off
Off
Low
-Normal
On Charge
-16K
Normal
Normal
Normal
Low
Low
Low
Low
GND
-Reset
D.O
D.O
D.O
D.O
D.O
D.O
D.O
High
-On
On
On
Data
Read
--------
Low
Normal
Off
Off
Off
Instruct
Write
D.O
D.O
Active
On
---
Not
Off
D.O
On
--
Off
PIN
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
71
Description
LIGHTED
NC
KEYSTROBE _E
KEYSTROBE _D
KEYSTROBE _C
KEYSTROBE _B
KEYSTROBE _A
GND
VCC
TEST_CLK
TEST_MODE
_SELECT
TEST_DATA _IN
TEST_DATA
_OUT
KEYIN1
KEYIN2
KEYIN3
KEYIN4
KEYIN5
NC
CHARGE_CNT
EEPROM_CLK
EEPROM _DATA
UART_TX
UART_RX
EEPROM_WP
GND
PDN
Battlow
VREF
MIP
MIN
DCIN2
GNDA
VCCA
Headset _MIC_in
HEADSET_DET
ROUT0
HSSPOUT
VCCPA
SPOUTN
I/O
D.O
D.O
D.O
D.O
D.O
D.O
D.O
GND
VCC
D.I
D.I
High
On
-------VCC
---
High_Z
--Not
Not
Not
Not
Not
-----
Low
Off
Normal
Active
Active
Active
Active
Active
GND
----
D.I
D.O
---
---
---
D.I
D.I
D.I
D.I
D.I
D.O
D.O
D.O
D.I.O
D.O
D.I
D.O
GND
A.I
A.I
A.O
A.I
A.I
A.I
GND
VCC
A.I
A.I
A.O
A.O
VCC
A.O
Non
Non
Non
Non
Non
-Trickle
High
High
High
High
WP
--------VCC
----VCC
--
----------------------------
Key In
Key In
Key In
Key In
Key In
Normal
Normal
Low
Low
Low
Low
Write
GND
------GND
--------
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
21 EXPLANATION OF IC TERMINALS (RF PART)
21.1. IC901
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KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
22 HOW TO REPLACE A FLAT PACKAGE IC
Even if you do not have the special tools (for example, a spot heater) to remove the Flat IC, with some solder (large amount),
a soldering iron and a cutter knife, you can easily remove the ICs that have more than 100 pins.
22.1. PREPARATION
• PbF (: Pb free) Solder
• Soldering Iron
Tip Temperature of 700°F ± 20°F (370°C ± 10°C)
Note: We recommend a 30 to 40 Watt soldering iron. An expert may be able to use a 60 to 80 Watt iron where someone with
less experience could overheat and damage the PCB foil.
• Flux
Recommended Flux: Specific Gravity → 0.82.
Type → RMA (lower residue, non-cleaning type)
Note: See ABOUT LEAD FREE SOLDER (PbF: Pb free) (P.4)
22.2. FLAT PACKAGE IC REMOVAL PROCEDURE
1. Put plenty of solder on the IC pins so that the pins can be completely covered.
Note:
If the IC pins are not soldered enough, you may give pressure to the P.C. board when cutting the pins with a cutter.
2. Make a few cuts into the joint (between the IC and its pins) first and then cut off the pins thoroughly.
3. While the solder melts, remove it together with the IC pins.
When you attach a new IC to the board, remove all solder left on the land with some tools like a soldering wire. If some solder
is left at the joint on the board, the new IC will not be attached properly.
73
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
22.3. FLAT PACKAGE IC INSTALLATION PROCEDURE
1. Temporarily fix the FLAT PACKAGE IC, soldering the two marked pins.
*Check the accuracy of the IC setting with the corresponding soldering
foil.
2. Apply flux to all pins of the FLAT PACKAGE IC.
3. Solder the pins, sliding the soldering iron in the direction of the arrow.
22.4. BRIDGE MODIFICATION PROCEDURE
1. Lightly resolder the bridged portion.
2. Remove the remaining solder along the pins using a soldering iron as shown in the figure below.
74
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
23 CABINET AND ELECTRICAL PARTS (BASE UNIT)
23.1. KX-TG2820LAB
75
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
23.2. KX-TG2822LAB
76
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
24 CABINET AND ELECTRICAL PARTS (HANDSET)
Note:
(*1) Attach the spacer (No. 124) to the exact location described above.
(*2) This cable is fixed by welding. Refer to HOW TO REPLACE THE HANDSET LCD (P.21).
77
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
25 CABINET AND ELECTRICAL PARTS (CHARGER UNIT)
78
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
26 ACCESSORIES AND PACKING MATERIALS
26.1. KX-TG2820LAB
79
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
26.2. KX-TG2822LAB
80
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
27 TERMINAL GUIDE OF THE ICs, TRANSISTORS AND
DIODES
27.1. Base Unit
27.2. Handset
81
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
27.3. Charger Unit
82
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
28 REPLACEMENT PARTS LIST
Note:
Ref.
No.
1. RTL (Retention Time Limited)
Part No.
After the discontinuation of this assembly in production, the
item will continue to be available for a specific period of
time. The retention period of availability depends on the
type of assembly and the laws governing parts and product
retention.
7
8
9
10
11
12
13
14
15
16
At the end of this period, the assembly will no longer be
available.
28.1.1.2. KX-TG2822LAB
The marking (RTL) indicates that the Retention Time is
limited for this item.
2. Important safety notice
PQSA10161Y
PQHR11075Z
PQJT10218Y
PQJT10219Y
PQKE10384Z2
PQKE10385Z2
PQKF10668Z2
PQGT17873Z
PQHA10011Z
PQHA10023Z
Part Name & Description
Ref.
No.
Components identified by the
mark indicates special
characteristics important for safety. When replacing any of
these components, only use specified manufacture´s parts.
3. The S mark means the part is one of some identical parts.
For that reason, it may be different from the installed part.
4. ISO code (Example: ABS-94HB) of the remarks column
shows quality of the material and a flame resisting grade
about plastics.
5. RESISTORS & CAPACITORS
Unless otherwise specified;
All resistors are in ohms (Ω) K=1000Ω, M=1000kΩ
All capacitors are in MICRO FARADS (µF) P=µµF
*Type & Wattage of Resistor
Part No.
1
2
3
4
5
PQGG10274Z4
PQQT22926Z
2AGG10275Z2
2CKM10653Z2
PQHR11076Z
6
PQHR11077Z
7
8
9
10
11
12
13
14
15
16
17
18
PQBC10419Z1
PQBC10420Z1
PQSA10161Y
PQHR11075Z
PQJT10218Y
PQJT10219Y
PQKE10384Z2
PQKE10385Z2
PQKF10651Y2
PQGT17877Z
PQHA10011Z
PQHA10023Z
ANTENNA
CASE, CHARGE TERMINAL
CHARGE TERMINAL (R)
CHARGE TERMINAL (L)
HOLDER, CHARGE TERMINAL (R)
HOLDER, CHARGE TERMINAL (L)
CABINET COVER
NAME PLATE
RUBBER PARTS, FOOT CUSHION
RUBBER PARTS, FOOT CUSHION
Part Name & Description
GRILLE, CRADLE
LABEL, CHARGE
GRILLE, LOCATOR
CABINET BODY
OPTIC CONDUCTIVE PARTS, LED
LENDS (IN USE)
OPTIC CONDUCTIVE PARTS, LED
LENDS (CHARGE)
BUTTON, LOCATOR1
BUTTON, LOCATOR2
ANTENNA
CASE, CHARGE TERMINAL
CHARGE TERMINAL (R)
CHARGE TERMINAL (L)
HOLDER, CHARGE TERMINAL (R)
HOLDER, CHARGE TERMINAL (L)
CABINET COVER
NAME PLATE
RUBBER PARTS, FOOT CUSHION
RUBBER PARTS, FOOT CUSHION
Remarks
PS-HB
POM-HB
POM-HB
PS-HB
Remarks
PC-HB
PS-HB
PS-HB
PS-HB
ABS-HB
ABS-HB
PS-HB
POM-HB
POM-HB
PS-HB
28.1.2. Main P.C. Board Parts
Note:
(*1) When you have replaced IC501 or IC611, adjust X501.
Refer to Check and Adjust X501 (Base Unit) Frequency
(P.42).
28.1. Base Unit
Ref.
No.
PCB1
Part No.
PQWPG2820LAH
PCB1
PQWPG2822LAH
IC301
IC331
IC332
IC501
IC611
IC611
IC901
C0CBAAF00031
C0CBABF00020
C0EBE0000503
C2HBBK000086
PQWIG2820LAH
PQWIG2822LAH
C1CB00001657
Q111
Q131
Q141
Q142
Q161
Q171
Q361
Q362
Q371
Q372
Q521
2SD1819A
2SD1819A
B1ADGP000008
B1BBAP000021
2SD0874AS
2SD1819A
2SB1218A
PQVTDTC144TU
2SD1758Q
2SD1819A
2SC39300CL
28.1.1. Cabinet and Electrical Parts
28.1.1.1. KX-TG2820LAB
Ref.
No.
Part No.
1
2
3
4
PQGG10274Z2
PQQT22926Z
2CKM10653Y2
PQHR11076Z
5
PQHR11077Z
6
PQBC10421Z1
Part Name & Description
GRILLE, CRADLE
LABEL, CHARGE
CABINET BODY
OPTIC CONDUCTIVE PARTS, LED
LENDS (IN USE)
OPTIC CONDUCTIVE PARTS, LED
LENDS (CHARGE)
BUTTON, LOCATOR
Remarks
PC-HB
PS-HB
PS-HB
PS-HB
ABS-HB
83
Part Name & Description
MAIN P.C.BOARD ASS´Y (RTL)
(for KX-TG2820LAB)
MAIN P.C.BOARD ASS´Y (RTL)
(for KX-TG2822LAB)
(ICs)
IC
IC
IC
IC (*1)
IC (for KX-TG2820LAB) (*1)
IC (for KX-TG2822LAB) (*1)
IC
(TRANSISTORS)
TRANSISTOR(SI)
TRANSISTOR(SI)
TRANSISTOR(SI)
TRANSISTOR(SI)
TRANSISTOR(SI)
TRANSISTOR(SI)
TRANSISTOR(SI)
TRANSISTOR(SI)
TRANSISTOR(SI)
TRANSISTOR(SI)
TRANSISTOR(SI)
(DIODES)
Remarks
S
S
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
Ref.
No.
D101
D113
D133
D142
D301
D361
D362
D371
D903
D904
LED677
LED679
Part No.
PQVDMD5S
MA111
MA111
PQVDRLZ20A
B0JCME000035
MA8220
B0ECKM000008
MA8220
B0DCCD000011
B0DCCD000011
PQVDHPY1105W
PSVD111R820R
L101
L102
L300
L361
L371
L501
L901
L902
L903
L904
L905
L909
L911
L913
L990
PQLQXF330K
PQLQXF330K
PQLQXF3R3K
G1C6R8MA0072
G1C6R8MA0072
PQLQR2KA213
MQLPF18NJFB
MQLPF10NJFB
MQLRF3N3DFB
MQLRF22NJFB
MQLRF10NJFB
MQLRF3N9DFB
MQLRF2N7DFB
MQLRF18NJFB
G1C1R0KA0096
RA501
RA901
D1H84724A013
D1H810240004
SA102
SA103
PQVDDSS301L
PQVDDSS301L
R111
R112
R113
R114
R121
R122
R131
R132
R134
R136
R137
R141
R142
R143
R145
R161
R162
R163
R164
R165
R167
R168
R171
R172
R175
R176
R178
R183
R185
R361
R364
R365
R371
R372
R373
R374
R375
R421
ERJ3GEYJ104
ERJ3GEYJ104
ERJ3GEYJ103
ERJ2GEJ473
ERJ3GEYJ394
ERJ3GEYJ394
ERJ3GEYJ106
ERJ3GEYJ395
ERJ2GEJ102
ERJ3GEYJ135
ERJ3GEYJ473
ERJ3GEYJ104
ERJ3GEYJ103
ERJ3GEYJ103
ERJ3GEYJ473
ERJ3GEYJ751
ERJ3GEYJ393
ERJ12YJ330
ERJ3GEYJ470
ERJ3GEYJ431
ERJ2GEJ102
ERJ3GEY0R00
ERJ2GEJ270
ERJ2GEJ104
ERJ2GEJ561
ERJ2GEJ101
ERJ2GEJ102
ERJ2GEJ222
ERJ2GEJ333
ERJ3GEYJ332
ERJ3GEYJ103
ERJ3GEYJ102
ERJ3GEYJ8R2
ERJ3GEYJ120
ERJ3GEYJ150
ERJ3GEYJ101
ERJ3GEYJ391
ERJ2GEJ473
Part Name & Description
DIODE(SI)
DIODE(SI)
DIODE(SI)
DIODE(SI)
DIODE(SI)
DIODE(SI)
DIODE(SI)
DIODE(SI)
DIODE(SI)
DIODE(SI)
LED
LED
(COILS)
COIL
COIL
COIL
COIL
COIL
COIL
COIL
COIL
COIL
COIL
COIL
COIL
COIL
COIL
COIL
(COMPONENTS PARTS)
RESISTOR ARRAY
RESISTOR ARRAY
(VARISTORS)
VARISTOR (SURGE ABSORBER)
VARISTOR (SURGE ABSORBER)
(RESISTORS)
100K
100K
10K
47K
390K
390K
10M
3.9M
1K
1.3M
47K
100K
10K
10K
47K
750
39K
33
47
430
1K
0
27
100K
560
100
1K
2.2K
33K
3.3K
10K
1K
8.2
12
15
100
390
47K
Remarks
S
S
S
S
S
S
S
S
S
S
S
S
84
Ref.
No.
R422
R423
R521
R522
R523
R524
R525
R533
R611
R612
R675
R677
R906
R909
R919
R930
R931
R932
R933
R940
R941
R942
R943
R991
J600
J601
Part No.
ERJ2GEJ102
ERJ2GEJ102
ERJ2GEJ182
ERJ2GEJ151
ERJ2GEJ393X
ERJ2GEJ561
ERJ2GEJ681
ERJ2GEJ472X
ERJ3GEYJ102
ERJ2GEJ103
ERJ2GEJ821
ERJ2GEJ331
ERJ2RKF103X
ERJ2GEJ331
ERJ2GEJ102
ERJ2GEJ102
ERJ2GEJ102
ERJ2GEJ102
ERJ2GEJ331
ERJ2GEJ4R7
ERJ2GEJ100
ERJ2GEJ100
ERJ2GE0R00
ERJ2GEJ102
ERJ2GE0R00
ERJ2GE0R00
C101
C102
C111
C112
C113
C120
C121
C122
C132
C142
C161
C162
C163
C165
C166
C167
C172
C176
C178
C179
C184
C185
C303
C305
C306
C341
C342
C343
C347
C352
C361
C365
C371
C373
C380
C381
C421
C422
C423
C501
C503
C504
C508
C509
C513
C515
ECUV2H681KB
ECUV2H681KB
F1J2A473A024
F1J2A473A024
PQCUV1A684KB
ECUE1E562KBQ
ECUV1H681JCV
ECUV1H681JCV
ECUV1H103KBV
ECUV1H103KBV
EEE1EA100WR
ECUV1H101JCV
ECJ1VB1H472K
ECUV1C473KBV
EEE1CA100SR
ECUV1A224KBV
ECUE1H272KBQ
EEE0JA470SR
ECUV1C473KBV
ECUE1C153KBQ
F1G1A473A032
F1G1C183A081
ECUV1H103KBV
ECUV1H103KBV
EEE1CA101WP
EEE0JA331P
F1G1A1040003
F1G1A1040003
F1G1A1040003
F1G1A1040003
ECUV1H102KBV
ECJ0EB1C103K
ECUV1C104KBV
F3F0J106A057
EEE0GA331WP
F1G1A1040003
F1G1A1040003
F1G1A1040003
F1G1A1040003
F1G1A1040003
F1G1A1040003
F1G1A1040003
ECUE1H020CCQ
ECUE1H020CCQ
F1G1A1040003
F1G0J1050007
Part Name & Description
1K
1K
1.8K
150
39K
560
680
4.7K
1K
10K
820
330
10K
330
1K
1K
1K
1K
330
4.7
10
10
0
1K
0 (for KX-TG2822LAB)
0 (for KX-TG2820LAB)
(CAPACITORS)
680P
680P
0.047
0.047
0.68
0.0056
680P
680P
0.01
0.01
10
100P
0.0047
0.047
10
0.22
0.0027
47
0.047
0.015
0.047
0.018
0.01
0.01
100P
330
0.1
0.1
0.1
0.1
0.001
0.01
0.1
10
330
0.1
0.1
0.1
0.1
0.1
0.1
0.1
2P
2P
0.1
1
Remarks
S
S
S
S
S
S
S
S
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
Ref.
No.
C516
C517
C518
C521
C522
C524
C525
C551
C611
C612
C660
C904
C910
C911
C917
C918
C922
C937
C938
C939
C940
C941
C942
C944
C946
C952
C956
C960
C962
C963
C964
C965
C976
C977
C979
C980
C983
C984
C990
C991
C992
C993
C996
C997
C998
Part No.
F3F0J106A057
F1G1A1040003
F1J0J1060006
ECUE1H3R0CCQ
F1G1A1040003
F1G1A1040003
F1G1A1040003
ECJ0EB1C103K
F1G1A1040003
ECUV1H101JCV
F1G1A1040003
ECUE1H020CCQ
ECUE1H1R5CCQ
ECUE1H470JCQ
ECUE1H100DCQ
ECUE1H5R0CCQ
ECUE1H100DCQ
ECUE1H471KBQ
ECUE1H100DCQ
ECUE1H100DCQ
ECUE1C103KBQ
ECUE1H102KBQ
PQCUV0J475MB
F1G1A1040003
ECUE1H222KBQ
ECUE1H020CCQ
ECUE1H100DCQ
ECUE1H100DCQ
ECUE1H100DCQ
ECUE1H100DCQ
ECUE1H102KBQ
ECJ0EC1H221J
F1G1A1040003
ECUE1H102KBQ
ECUE1H102KBQ
ECUE1C103KBQ
ECUE1H102KBQ
ECUE1H101JCQ
ECUE1H102KBQ
ECUE1H5R0CCQ
F1G1H121A444
F1G1A1040003
F1G1A1040003
ECUE1H0R5CCQ
ECUE1H0R5CCQ
E1
E2
CN101
FL901
P101
S661
S662
PQMC10494Z
PQMC10493Z
PQJJ2H003Z
J0E2457B0008
PFRT002
PQSH1A117Z
PQSH1A117Z
X501
H0J138500003
Part Name & Description
10
0.1
10
3P
0.1
0.1
0.1
0.01
0.1
100P
0.1
2P
1.5P
47P
10P
5P
10P
470P
10P
10P
0.01
0.001
4.7
0.1
0.0022
2P
10P
10P
10P
10P
0.001
220P
0.1
0.001
0.001
0.01
0.001
100P
0.001
5P
120P
0.1
0.1
0.5P
0.5P
(OTHERS)
MAGNETIC SHIELD, FRAME
MAGNETIC SHIELD, COVER
JACK
LCR FILTER
THERMISTOR (POSISTOR)
SWITCH, TACT
SWITCH, TACT (for KXTG2822LAB only)
CRYSTAL OSCILLATOR
Remarks
S
S
S
S
S
S
S
S
S
S
S
S
PQGP10280Z2
2AKM10672Z2
102
2BKM10672Z2
103
104
105
106
107
107
PQHS10658Z
L0AD02A00023
PQHR11106Z
PQHS10652Z
PQGT17874Z
PQGT17878Z
Part Name & Description
PANEL, LCD
CABINET BODY (for KXTGA243LAB)
CABINET BODY (for KXTGA246LAB)
SPACER, RECEIVER
RECEIVER
GUIDE, RECEIVER
SPACER, LCD CUSHION
NAME PLATE (for KX-TGA243LAB)
NAME PLATE (for KX-TGA246LAB)
Part Name & Description
1ABC10422Z1
PQSX10280R
PQSA10162Z
PQWE10036Z
PQJT10216Z
PQJT10217Z
PQHR10778Z
PQHG10689Z
L0AD02A00026
PQHS10622Z
PQKF10664Z2
PQKE10394Z5
BUTTON, NAVI KEY
KEYBOARD SWITCH
ANTENNA
BATTERY TERMINAL
CHARGE TERMINAL (R)
CHARGE TERMINAL (L)
GUIDE, SP HOLDER
SPACER, SPEAKER
SPEAKER
SPACER, SPEAKER
CABINET COVER
COVER, LED CAP
120
PQHR11080Z
121
122
PQHR11081Z
PQHX11294X
123
124
125
HHR-P105A
PQHS10681Y
PQKK10586Z2
OPTIC CONDUCTIVE PARTS, LED
LENS
GUIDE, LED CAP
PLASTIC PARTS, BATTERY COVER
SHEET
BATTERY
SPACER, BATTERY
LID, BATTERY COVER
Remarks
ABS-HB
ABS-HB
ABS-HB
ABS-HB
PC+ABSHB
PMMA-HB
ABS-HB
ABS-HB
Note:
S
S
S
S
S
S
S
(*1) When you have replaced IC201 or IC241, adjust X201.
Refer to Check and Adjust X201 (Handset) Frequency
(P.42) and Adjust Battery Low Detector Voltage
(Handset) (P.42).
(*2) When replacing the Handset LCD, see HOW TO
REPLACE THE HANDSET LCD (P.21)
S
S
S
S
S
S
S
S
S
S
28.2.1. Cabinet and Electrical Parts
Part No.
Part No.
28.2.2. Main P.C. Board Parts
28.2. Handset
Ref.
No.
101
102
Ref.
No.
108
109
110
111
112
113
114
115
116
117
118
119
Remarks
AS-HB
ABS-HB
ABS-HB
ABS-HB
85
Ref.
No.
PCB100
Part No.
PQWPG2820LAR
IC201
IC221
IC241
C2HBBK000090
PQVIC61CC22N
PQWIG2820LAR
IC371
IC373
IC374
IC381
IC901
C0CBCAD00071
C0DBAGZ00053
PQVIC61CC20N
C0CBCAD00070
C1CB00001657
Q221
Q231
Q243
Q251
Q252
Q253
Q361
Q362
Q363
Q373
2SD1819A
UN521
UNR521500L
PSVTUMG11NTR
PSVTUMG11NTR
UN521
2SB1197KQ
2SD1819A
PQVTDTC143E
PQVTXP151A13
D223
D361
D373
D903
D904
LED256
LED257
LED258
LED261
MA111
B0JCMD000010
MA21D3400L
B0DCCD000011
B0DCCD000011
B3ACB0000115
B3ACB0000115
B3ACB0000115
B3ACB0000134
L326
L327
L373
L901
L902
G1CR47J00005
G1CR47J00005
G1C470MA0176
MQLPF18NJFB
MQLPF10NJFB
Part Name & Description
MAIN P.C.BOARD ASS´Y (RTL)
(ICs)
IC (*1)
IC
IC (for KX-TGA243LAB) (for
KX-TGA246LAB)(*1)
IC
IC
IC
IC
IC
(TRANSISTORS)
TRANSISTOR(SI)
TRANSISTOR(SI)
TRANSISTOR(SI)
TRANSISTOR(SI)
TRANSISTOR(SI)
TRANSISTOR(SI)
TRANSISTOR(SI)
TRANSISTOR(SI)
TRANSISTOR(SI)
TRANSISTOR(SI)
(DIODES)
DIODE(SI)
DIODE(SI)
DIODE(SI)
DIODE(SI)
DIODE(SI)
LED
LED
LED
LED
(COILS)
COIL
COIL
COIL
COIL
COIL
Remarks
S
S
S
S
S
S
S
S
S
S
S
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
Ref.
No.
L903
L904
L905
L909
L911
L913
L990
Part No.
MQLRF3N3DFB
MQLRF22NJFB
MQLRF10NJFB
MQLRF3N9DFB
MQLRF2N7DFB
MQLRF18NJFB
G1C1R0KA0096
RA201
RA901
CA271
CA274
EXRV8V472JV
D1H810240004
F5A424740002
F5A841040004
R203
R208
R209
R222
R223
R225
R226
R227
R231
R234
R241
R242
R243
R252
R256
R257
R258
R261
R272
R273
R312
R314
R315
R317
R318
R323
R325
R332
R340
R361
R362
R363
R368
R376
R377
R401
R402
R906
R909
R919
R930
R931
R932
R933
R940
R941
R942
R943
R991
ERJ2GEJ104
ERJ2GEJ100
ERJ2GEJ104
ERJ2GEJ223
ERJ2GEJ224
ERJ2GEJ102
ERJ2GEJ273X
ERJ2GEJ224
ERJ2GEJ223
ERJ2GEJ103
ERJ2GEJ103
ERJ2GEJ102
ERJ2GEJ274
ERJ2GEJ103
ERJ2GEJ121
ERJ2GEJ121
ERJ2GEJ121
ERJ2GEJ101
D1BB4303A055
D1BB8203A055
ERJ2GEJ222
ERJ2GEJ222
ERJ2GEJ222
ERJ2GEJ101
ERJ2GEJ222
ERJ2GEJ180
ERJ2GEJ180
ERJ2GEJ103
ERJ2GE0R00
ERJ2GEJ473
ERJ2GEJ561
ERJ2GEJ473
ERJ3GEYJ102
ERJ2GEJ225
ERJ3GEYJ106
ERJ2GEJ101
ERJ2GEJ182
ERJ2RKF103X
ERJ2GEJ331
ERJ2GEJ102
ERJ2GEJ102
ERJ2GEJ102
ERJ2GEJ102
ERJ2GEJ331
ERJ2GEJ4R7
ERJ2GEJ100
ERJ2GEJ100
ERJ2GE0R00
ERJ2GEJ102
C201
C202
C204
C206
C208
C211
C212
C214
C215
C221
F1G1H6R0A445
F1G1H6R0A445
F1G1A1040003
F1G1A1040003
F1J0J1060006
EEEFK0J331P
ECJ0EB1C103K
F1J0J1060006
F1G1A1040003
ECJ0EB1C103K
Part Name & Description
COIL
COIL
COIL
COIL
COIL
COIL
COIL
(COMPONENTS PARTS)
RESISTOR ARRAY
RESISTOR ARRAY
CAPACITOR ARRAY
CAPACITOR ARRAY
(RESISTORS)
100K
10
100K
22K
220K
1K
27K
220K
22K
10K
10K
1K
270K
10K
120
120
120
100
430K
820K
2.2K
2.2K
2.2K
100
2.2K
18
18
10K
0
47K
560
47K
1K
2.2M
10M
100
1.8K
10K
330
1K
1K
1K
1K
330
4.7
10
10
0
1K
(CAPACITORS)
6P
6P
0.1
0.1
10
330P
0.01
10
0.1
0.01
Remarks
S
S
86
Ref.
No.
C222
C224
C225
C226
C227
C231
C241
C242
C246
C272
C273
C303
C305
C306
C314
C315
C317
C321
C340
C353
C371
C372
C373
C377
C381
C382
C384
C904
C910
C911
C917
C918
C922
C937
C938
C939
C940
C941
C942
C944
C946
C952
C956
C960
C962
C963
C964
C965
C976
C977
C979
C980
C983
C984
C990
C991
C992
C993
C996
C997
C998
Part No.
F1G1A1040003
F1G1A1040003
F1G1A1040003
F1G1A1040003
F1G1A1040003
F1G1A1040003
F1G1A1040003
ECUE1H101JCQ
F1G1A1040003
ECUV1C474KBV
ECUV1C104KBV
F1G0J1050007
ECJ0EB1C103K
F1G1A1040003
F1G1C183A081
F1G1C183A081
ECST0JY226
ECST0JY335
ECJ0EB1C103K
ECUV1H103KBV
ECUV1A105KBV
ECUV1A105KBV
EEEFK0J331P
F1G1A1040003
EEE0JA101SP
ECUV1A105KBV
ECUV1A105KBV
ECUE1H020CCQ
ECUE1H1R5CCQ
ECUE1H470JCQ
ECUE1H100DCQ
ECUE1H5R0CCQ
ECUE1H100DCQ
ECUE1H471KBQ
ECUE1H100DCQ
ECUE1H100DCQ
ECUE1C103KBQ
ECUE1H102KBQ
PQCUV0J475MB
F1G1A1040003
ECUE1H222KBQ
ECUE1H020CCQ
ECUE1H100DCQ
ECUE1H100DCQ
ECUE1H100DCQ
ECUE1H100DCQ
ECUE1H102KBQ
ECJ0EC1H221J
F1G1A1040003
ECUE1H102KBQ
ECUE1H102KBQ
ECUE1C103KBQ
ECUE1H102KBQ
ECUE1H101JCQ
ECUE1H102KBQ
ECUE1H5R0CCQ
F1G1H121A444
F1G1A1040003
F1G1A1040003
ECUE1H0R5CCQ
ECUE1H0R5CCQ
MIC
E101
E102
E103
E104
E105
E106
E107
X201
FL901
L0CBAB000052
L5DCBDC00022
PQHX11327Z
PQHR11065Z
PQHX11292Z
PQHR11078Z
PQMC10494Z
PQMC10493Z
H0J138500003
J0E2457B0008
Part Name & Description
0.1
0.1
0.1
0.1
0.1
0.1
0.1
100P
0.1
0.47
0.1
1
0.01
0.1
0.018
0.018
22
3.3
0.01
0.01
1
1
330
0.1
100P
1
1
2P
1.5P
47P
10P
5P
10P
470P
10P
10P
0.01
0.001
4.7
0.1
0.0022
2P
10P
10P
10P
10P
0.001
220P
0.1
0.001
0.001
0.01
0.001
100P
0.001
5P
120P
0.1
0.1
0.5P
0.5P
(OTHERS)
MICROPHONE
LIQUID CRYSTAL DISPLAY (*2)
COVER, LCD COVER SHEET
TRANSPARENT PLATE, LCD PLATE
PLASTIC PARTS, LCD SHEET
GUIDE, LCD
MAGNETIC SHIELD, FRAME
MAGNETIC SHIELD, COVER
CRYSTAL OSCILLATOR
LCR FILTER
Remarks
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
PMMA-HB
ABS-HB
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
28.3. Charger Unit
Ref.
No.
P1
Part No.
Part Name & Description
XZB21X35A03
P2
XZB10X35A02
P3
P4
P5
PQPK14780Y
PQPD10658Z
PQPD10659Z
PROTECTION COVER (for Base
Unit)
PROTECTION COVER (for
Handset)
GIFT BOX
CUSHION
CUSHION
28.3.1. Cabinet and Electrical Parts
Ref.
No.
200
200-1
200-2
200-3
200-4
200-5
200-6
200-7
200-8
200-9
Part No.
PQLV30029SB
PQKM10667Y3
PQQT22926Z
2AGG10283Z9
PQJT10218Y
PQJT10219Y
PQKE10384Z2
PQKE10385Z2
PQHR11109Z
PQHR11093Z
200-10
200-11
200-12
PQKF10662Y2
PQGT17936Z
PQHA10023Z
Part Name & Description
CHARGER UNIT
CABINET BODY
LABEL, CHARGE
GRILLE
CHARGE TERMINAL (R)
CHARGE TERMINAL (L)
HOLDER, CHARGE TEMINAL (R)
HOLDER, CHARGE TEMINAL (L)
CASE, CHARGE TERMINAL
OPTIC CONDUCTIVE PARTS, LED
LENS
CABINET COVER
NAME PLATE
RUBBER PARTS, FOOT CUSHION
Remarks
ABS-HB
28.4.2. KX-TG2822LAB
PC-HB
Part No.
PQWPTGA246CH
IC1
C0CAAEG00007
Q2
Q3
Q4
Q5
2SD21360R
2SD1991A
2SA933
UN4210
D1
D2
LED1
PQVDAK04A
B0EAKP000106
LNJ201LPQJA
L1
L2
PQLQXF4R7K
PQLQXF4R7K
CN1
PQJJ1B4Y
R1
R2
R3
R4
R6
R7
R8
R9
R10
ERDS2TJ821
ERDS2TJ000
ERDS2TJ101
ERDS2TJ8R2
ERDS2TJ681
ERDS2TJ000
ERDS2TJ102
ERDS2TJ120
ERDS2TJ150
C1
C2
ECEA1HKS010
ECEA1HKS010
Part Name & Description
MAIN P.C.BOARD ASS´Y (RTL)
(IC)
IC
(TRANSISTORS)
TRANSISTOR(SI)
TRANSISTOR(SI)
TRANSISTOR(SI)
TRANSISTOR(SI)
(DIODES)
DIODE(SI)
DIODE(SI)
LED
(COILS)
COIL
COIL
(JACK)
JACK
(RESISTORS)
820
0
100
8.2
680
0
1K
12
15
(CAPACITORS)
1
1
A4
PQQW14772Z
PQQW14772Z
XZB21X35A03
P2
XZB10X35A02
P3
XZB15X25A04
P4
P5
P6
P7
PQPK14782Y
PQPN11722Y
PQPD10660Z
PQPD10661Z
AC ADAPTOR
CORD, TELEPHONE
STAND, WALL MOUNT
PS-HB
INSTRUCTION BOOK (for
Spanish) (*1)
QUICK GUIDE (for Portuguese)
PROTECTION COVER (for Base
Unit)
PROTECTION COVER (for
Handset)
PROTECTION COVER (for Charger
Unit)
GIFT BOX
ACCESSORY BOX
CUSHION
CUSHION
When replacing the Handset LCD, see HOW TO REPLACE
THE HANDSET LCD (P.21).
S
Part No.
PQZZ430PIR
PQZZ430PRB
S
S
S
S
28.4.1. KX-TG2820LAB
PQLV19Y
PQJA10075Z
PQQX14729Y
A5
P1
Remarks
Note:
(*1) You can download and refer to the Operating
Instructions (Instruction book) on TSN Server.
Part Name & Description
PQLV19Y
PQJA10075Z
PQKL10067Z2
PQQX14729Y
Part Name & Description
28.5. Fixtures and Tools
S
S
Note:
Part No.
Part No.
Remarks
28.4. Accessories and Packing
Materials
Ref.
No.
A1
A2
A3
Ref.
No.
A1
A2
A3
A4
PS-HB
28.3.2. Main P.C. Board Parts
Ref.
No.
PCB200
Remarks
Remarks
AC ADAPTOR
CORD, TELEPHONE
INSTRUCTION BOOK (for
Spanish) (*1)
QUICK GUIDE (for Portuguese)
87
Part Name & Description
TIP OF SOLDERING IRON
RUBBER OF SOLDERING IRON
Remarks
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
Memo
88
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
29 FOR SCHEMATIC DIAGRAM
29.1. Base Unit (SCHEMATIC DIAGRAM (BASE UNIT_MAIN))
Notes:
1. DC voltage measurements are taken with voltmeter from the negative voltage line.
2. This schematic diagram may be modified at any time with the development of new technology.
29.2. Handset (SCHEMATIC DIAGRAM (HANDSET_MAIN))
Notes:
1. DC voltage measurements are taken with an oscilloscope or a tester with a ground.
2. The schematic diagrams and circuit board may be modified at any time with the development of new technology.
29.3. Charger Unit (SCHEMATIC DIAGRAM (CHARGER UNIT))
Notes:
1. DC voltage measurements are taken with voltmeter from the negative voltage line.
2. This schematic diagram may be modified at any time with the development of new technology.
89
J600
J601
J600
J601
NC
0
(for KX-TG2820)
STB1 STB2 STB3 STB4
0
NC
(for KX-TG2822)
NC: No Components
90
GND
S662
NC 4
3
2
1
4
S661
3
2
1
KIN1
KIN2
KIN3
6
C612 J100
SPM
D133
C454
NC
C505 NC
TX 940mVp-p
NC
NC
R474
R473
NC
C457
NC
R460
NC
C458
NC
NC
NC
NC
C453
26.6ms
C120
L402
SP PAD
R453
NC
R454 NC
R459
NC
NC
NC
K0.1
C347
VCCA 3.3V
C456
C455
NC
Analog
SPP
C518 10uF
47K
1K
C421
K0.1
C379 NC
330u/4.0V
C380
K0.1
C381
2.5V
NC
C517 K0.1
C459
RSSI
R421
R423
2
D472
C514
NC
C513
C181
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
NC
NC
K0.015
K0.1
1K
150
R522
R525 680
SCLK
NC
VCCPLL
GNDPLL
VCCR
RSSI
VREFR
TXMOD
GNDR
MIP
MIN
VREF
HSMIN
HSMIP
GNDA
VCCA
LIN0
DCIN
LOUT0
HSSP
VCCPA
SPN
R517
C512
NC
C179
R509
C423
C2P
C508
R422
560
K0.1
C522
SDATA
D471
IC501
C2P
X501
13.824MHz
C509
TXO
NC
K0.1
RF_RESET
NC
NC
NC
R521 1.8K
C471
R594
R593
C521 C3P
C472
C422
SHCTRL
R524
C524 K0.1
SDIO
K0.1
C352
K0.1
NC
NC
R592
MOD_EN
TX_DATA
PDN
K0.01
C503 K0.1
RX_DATA
RX_GAIN
TX_EN
RX_EN
OSC_IN
C377
100
RF_RESET
RSSI
C365
SDATA
SLE
SCLK
SDIO
INT1
SEG11
SEG10
SEG9
SEG8
SEG7
SEG6
SEG5
SEG4
SEG3
COM2
COM1
UART_TX
UARTRX
INT0
DGPIO0/CD0
GND
VCC
MSG_LED
FL_CLK
INT1
C687 NC
URX
RXD
NC
4.7K
Q521
C661
W_GND
L501 2KA213
RX_DATA
KEY3
KEY2
KEY1
INT0
8
6
4
2
K0.1
TX_EN
K0.1
RX_EN
C525
RX_GAIN
SHCTRL
R523 39K
C686 NC
C685 NC
NC
C504 K0.1
6
C501
JG
JO
JI
JS
JC
TX_DATA
NC
80
79
78
77
76
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
C551 K0.01
SLE
C662
KEYD
KEYC
KEYB
KEYA
1
3
5
7
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
SEG12
TDO
TDI
TMS
TCL
ANT0
SHCTRL
VCC
GND
RADIOEN
RF_RST
ANS_LED
INUSE_LED
CHG_LED
RXI
RXGAIN
TXEN
RXEN
BGPIO6
FL_CS
FL_SI
FL_SO
MOD_EN
TXDATA
FL_RST
PDN
RSTN
GND
XIN
XOUT
5
RLY
BELL
LINE_SZ
RLY
ACDOWN
AGPIO6/CA6
AGPIO7/CA7
KEYS_D
KEYS_C
KEYS_B
KEYS_A
CHG_CTL
CHG_DET
VCC
GND
EROM_WP
EROM_DATA
EROM_CLK
KEYIN3
KEYIN2
KEYIN1
EGPIO10/HDB6
SERIAL_DAT
SERIAL_LE
SERIAL_CLK
SELIAL_DI
EGPIO15/HAD15
GND
SPP
GNDPA
UTX
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
7
7
5
3
1
KEY1
8
KEY2
NC
CN661
GND
KEYIN1 26
ANT
KEYIN2 25
NC
GND
R591
NC
KEY3
RSSI
SEG12
OSC_IN
SEG12 23
RF_RESET
KEYIN3 24
RX_DATA
ANTG1 ANT1
TX_EN
SEG11
RX_EN
SEG10
SHCTRL
SEG11 22
NC
TX_DATA
SEG10 21
C603
RX_GAIN
R533 4.7K
SLE
SEG9
SCLK
SEG9 20
MSG_LED
SDATA
SEG8
to RF PART
SDIO
SEG7
R602 NC
MOD_EN
SEG8 19
SEG6
SEG5
C601 NC
VBATT2
SEG7 18
SEG6 17
6
8
SEG5 16
4 GND
-
SEG4
RA500
+
SEG3
+
NC 13
NC
NC
2
SEG4 15
C663
C664
VCC
SEG3 14
1K
R611
NC
IC201
NC 12
SEG12
SEG11
SEG10
SEG9
SEG8
SEG7
SEG6
SEG5
SEG4
SEG3
COM2
COM1
7
-
COM2
3
COM1
Power ON
2
(Reset)
4
9
NC
NC
R204
1
COM2 11
C665
Q202
NC
COM1 10
8
10K
IC611 16K
R612
NC
R601 NC
KEYD
R205
Q201
NC
KEYC
NC
R203
RDY
KEYS_D
NC
NC
R670
R671
C666
NC
C202
IO1
8
KEYB
NC
NC
NC
R201
RA501
W_VDD
KEYS_C
NC
R669
SDA
7
SCL
VSS
C667
C668
NC
NC
NC
NC
14
13
12
11
10
9
8
7
6
5
4
3
2
1
KEYS_B
A2
KEYA
WP
NC
VCC
A1
R668
A0
6
5
ANS_LED
C669
C670
C671
NC
R202
NC
KEYS_A
ANS_LED
820
C611
R679
CHG_LED
INUSE_LED
4
NC
3
330
2
R677
1
R675
C672
R206
SO
SI
BCLK
CS
NC
NC
NC
GND
VCC
NC
NC
WP
RESET
RDY
4
MSG_LED
CHG_LED
INUSE_LED
ANS_LED
C201
NC
3
2
NC
C680
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
C677
NC
NC
C679
R680
NC
C675
IC601
CHG_LED
1
LED679
LED677
15
16
17
18
19
20
21
22
23
24
25
26
27
28
MSG_LED
2AP_VCC
C660 K0.1
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
30 SCHEMATIC DIAGRAM (BASE UNIT_MAIN)
VBATT2
MOD_EN
2.5V
IC301
OUT IN
GND
3
1
(1)
VCC
3.3V
(2)
RST
(3)
(DSP,MIC)
(4)
MIP
MIC
MIM
K0.1
C516 10u/6.3V
C515 K1.0
(5)
R178
1K
R134
1K
(6)
(7)
K5600P
(8)
(9)
(10)
SP VCCPA 3.3V
L401
(11)
SP
5
(12)
(13)
(14)
(15)
(16)
(17)
(18)
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
(1)
REFERENCE
1XX : TEL LINE
3XX : POWER, CHARGE,
4XX : RESET,MIC, SP
5XX : DSP,RF I/F
6XX : FLASH, KEY, LCD
7XX : RF(2.4G)
8XX : RF(5.8G)
3.3V
R361
D362
K0.1
C343
Q362
CHARGE PAD
C371
K0.1
6.8uH
CHARGE+
CHRGE-
15
7~10V
DCP
R342
NC
CHG
(4)
2
4
1
L101
D131
NC
L102
C102
680P(3216)
33uH
NC
SA102
DCM
L1T
CN101
1
+6v
2
GND
4
T
3
R
P101 22
L1R
390K C121
K680P(50V)
CIDM
R122
390K C122
K680P(50V)
C111 K0.047 R111 100K
R121
R185 33K
R184
TX
82mVp-p
10K
Tx
-10dBm/600Ω
700mVp-p
R113
C113 K0.68
Rx
(MIC Mute: ON)
-25dBm/600Ω IN
100mVp-p
R114 47K
D113
Q111
C112 K0.047 R112 100K
C183 NC
CIDP
NC
C185 K0.018
C184
NC
C182
(11)
R183 2.2K
K0.047
TEST SIGNAL
FREQUENCY: 1kHz
(8)
(9)
(10)
(12)
(13)
(14)
(15)
(16)
(17)
(18)
33uH
SA101 NC
47K
3
R137
3.9M
R132
D101
Q131
C132 K0.01
R133
R145
Q142
HOOK_DCIN
(6)
(7)
C101
680P(3216)
NC
47K
NC
R157
C161
10u/25V
R163
Q156
NC
SA104 NC
100K
R131
NC
R141
1.3M
R143
C141
R136
10K
10K
R142
C160
10M
20V
K0.01(50V)
C142
D142
NC
NC
NC
R161
R156
NC
R151
750
R160
C163
33(1/2W)
NC
C171
Q141
K4700P(50V)
R171 27
NC
C175
R162 39K
47
1K
C174 NC
(5)
0
C162 J100P
C165 K0.047
R164
Q171
R167
Q143
NC
Q161
R168
C167 K0.22
10u/16V
NC
430
R165
R166
NC
C177
C172
K2700P(50V)
C166
R176
560
NC
R172 100K
C178 K0.047
C176
C173
TX
800mVp-p
RX
11mVp-p
RX
125mVp-p
R175
47u/6.3V
100
CHG_CONT
R341 NC
R343 NC
Q340
NC
R340 NC
C301
R371
R373
D301
C373
Q373
NC
12
8.2
R374 100
Q372
R372
(3)
10u/6.3V
Q371
R375 390
CP
CM
L371
22V
RESET 2.7V
3.3K
Q361
22V
1K
10K
D361
R365
R364
4
D371
5
L361
NC
6.8uH
GND
K0.01
CD
VDD
C303
OUT
C361 K1000P
3
C305 K0.01
2
C342
1
L300 3.3u
1
3.3V
OUT IN
GND
3
C341 330u/6.3V
K0.1
IC332
100u/16V
2
C306
VCC 3.3V
SA103
IC331
(2)
HOOK_RLY
BELL
NC: No Components
KX-TG2820/2822 SCHEMATIC DIAGRAM (Base Unit_Main)
91
C0.5P
C997
ANT
3.9nH
L909
D10P
C0.5P
K0.1
C922
C998
2
4
J47P
FL901
3 C911
C996
1
330
18nH
R909
L913
D904
2.4GHz RX
3.3nH
L903
C918
C5P
C910
2.4GHz RF
D903
L904
C940
K0.01
D10P
C939
L911
2.7nH
D10P
C938
2.4GHz TX
C1.5P
C5P
C991
C990
K1000P
C2P
L901
22nH
TP_TESTN
TP_TESTP
C904
TESTP
TESTN
8
VCC_IF2
6
7
VCC_RF
RX
4
5
GND_RX
GND_TX
TX
3
2
1
J100P
C984
C983
K1000P
C2P
2
C992
J120P
1uH(1005)
L990
4
L905
10nH
IC901
8
7
C952
C941
VCC_PA 32
VCC_IF
9
SYN_OUT 31
10 XOUT
K1000P
SYN_DATA 30
11 XIN
K0.1
12 VCC_BIAS
R906
1
C993
6
RA901 3
1K
SYN_EN 29
5
SYN_CLK 28
13 REXT
C944
K0.1
R991
TXMOD 27
10K(1%)
14 RSSI
L902
D10P
TC_CTRL 17
VCC_DIG 18
VCC_PLL1A 19
VCC_PLL1B 20
TXEN 21
RXEN 22
VCC_PLL2B 23
VCC_PLL2A 24
C943
NC
D10P
C977
1K C937
K470P
RXGAIN 25
16 RX_DATA
C946
PA_RAMP 26
15 RSTN
C917
4.7uF
(2125)
R940
4.7
K1000P
C979
C995
C960
K2200P
C942
K0.1
0
R943
C980
18nH (PF)
330
R933
1K
R931
1K
R930
1K
R919
1K
R932
GND
GND
OSC_IN
RSSI
NC: No Components
RF_RESET
RX_DATA
SHCTRL
TX_EN
RX_EN
RX_GAIN
SDIO
SDATA
SLE
SCLK
TX_DATA
VBATT2
MOD_EN
KX-TG2820/2822 SCHEMATIC DIAGRAM (Base unit_RF Part)
2.5V
10
R942
10
R941
2.5V
K0.01
10nH (PF)
K1000P
C976
NC
C956
C961
C962
C963
C965
C964
K1000P
D10P
NC
D10P
D10P
J220P
NC
92
C966
31 SCHEMATIC DIAGRAM (BASE UNIT_RF PART)
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
Memo
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
93
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
RSSI_
to RF PART
TXO
RXI
MOD_EN
32 SCHEMATIC DIAGRAM (HANDSET_MAIN)
BCK
C246 K0.1
RSSI
(1)
(2)
(3)
TX_DATA
(4)
MOD_EN
(5)
OSC_IN
RX_EN
TX_EN
RX_GAIN
RX_DATA
(6)
(7)
(8)
(9)
(10)
(11)
C219 NC
SHCTRL
RF_RESET
SDATA
SLE
IC249
1
SCLK
2
SDIO
3
VBATT2
4
TA
NC
SO
SI
SCK
GND
RESET
VCC
CS
WP
8
(12)
7
6
R249 NC
5
(13)
(14)
(15)
(16)
(17)
(18)
(19)
(20)
(21)
(22)
FLASH_BOOT
ANT
TG
GND
TEST
BACK
SP
KIN_5
6.3V100
*
7
4
1
MENU
0
8
5
2
UP
SYA
9
6
3
NEXT
HOLD
RIGHT
OFF
MUTE
C204
K0.1
KIN_4
R204 NC
DB7
DB6
DB5
DB4
KIN_3
(25)
(26)
(27)
(28)
(29)
(30)
(31)
KIN_2
KIN_1
(32)
STB_E
STB_D
STB_A
K1.0
C384
STB_C
NC
4
VIN
2.5V REG
(23)
R203 100K
(24)
DOWN
STB_B
CE
TALK
C381
5
VOUT
VSS
C382 K1.0
3
NC
VRF
C383
2
LEFT
2.5V
IC381
1
PAUSE
(33)
(34)
(35)
(36)
(37)
(38)
NC
R251
(41)
DB4
DB5
DB6
B1
DB7
(45)
820K(1%)
NC
CN271
R402 1.8K
VSS 21
RESETB 22
K0.47
CAP1+ 20
3
1
4
2
CAP1- 19
CA271
CAP2- 17
CAP2+ 18
C272
VOUT 16
VR 15
R273
C273
K0.1
V1 13
V2 12
V3 11
V4 10
V0 14
8
6
4
2
7
5
3
1
CA274 K0.1
DB4 8
VDD 9
DB5 7
DB6 6
DB7 5
CSB 4
E_RD 3
RW_WR 2
RA251
NC
RS 1
NC
LED254
LCD
430K(1%)
K0.47
C1
R272
5
7
1
5
3
NC
LED253
LED252
NC
8
2
6
4
100
NC
LED251
(42)
(43)
(44)
1
2
E
3
C2
4
R261
Amber
ANT-Light
LED259
LED258
LED261
120
5
C1
Q251
B1
B2
1
2
R258
120
R257
LED257
NC
120
NC
R256
4
C2
Q252
B2
E
3
2.6V
LED256
LED255
10K
Q253
R252
(39)
(40)
3.0V
(46)
LCD-Light
Amber
(47)
NC: No Components
94
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
IC1
OUT
5
R4
1K
IN
8bit-MPU
Additional small PCB
TEST SIGNAL
FREQUENCY:1KHz
R340
0
R331
2.6V
L331 NC
2
NC
3
R332
NC
C335
C201 C6P
C202 C6P
(12)
10K
NC
R234
NC
R228
UART
R223 220K
C221
D324 NC
NC
NC
NC
D312
C312
C311
NC
NC
C313
2.2K
R312
NC
D327
2
3
Q231
R231
VDD
22K
4
NC
GND
2.2V RESET
S
Q361
K0.1
220K
NC
NC
K0.01
47K
C354
C353
R363
6.3V330
NC
IC374
3
NC
2
VDD
4
CHG2
L352
NC
OUT 1
CHG1
L351
R361 47K
VBAT2
VBAT1
NC
-
4
R227
C227
NC
BATTM
G
Q373
3.0V
R230
R366
R354
5
VDD
ON/OFF VSS
NC
560
EXT
1K
R367
R362
3
VOUT
VSS2
2
VSS1
1
D
C211
C361 NC
6.3V330
K1.0
C372
VIN
CE
VSS
+
IC373
DC/DC
DC/DC_OUT
D361
R368
BATTP
D373
C373
4
3
2
1
NC
VOUT
5
K1.0
C371
C242 J100P
5
6
EEPROM(64K)
SDA
VSS
7
IC371
4
SCL
A2
3
8
VCC
WP
A1
K0.1
D223
C223 NC
K0.1
C224
47uH
2.6V
2
IC241
22K
OUT 1
R232
C209
IC221
R376
2.2M
2.6V REG
A0
NC
CHARGE_DET
Q221
VCC
R241 10K
1
SP phone RX
(MIC Mute: ON)
1.8Vp-p/8
(Vol.MAX)
POWERDOWN
K0.01
NC
RX
TX
L373
C241 K0.1
D326 NC
RESET
L327
2.3~2.9V
R377 10M
C377 K0.1
NC
C243
NC
C244
100
R242 1K
D313
6V22
27K
R226
Power ON
(Reset)
Q363
Q362
R364
NC
GND
2.0V RESET
(47)
NC: No Components
KX-TGA243/246 SCHEMATIC DIAGRAM (Handset_Main)
95
IN
SP phone TX
-43dBm/600 IN
30mVp-p
R243
270K
R401
(45)
2.2K
MICP
Handset TX
-33dBm/600
88mVp-p
L326
R222 C222
Q243
NC
C336
NC
C316
C305 K0.01
24ms
R209 100K
(41)
(46)
2.2K K0.018
SP-Phone
RA201
4.7K
2
4
6
8
NC
NC
NC
MIC
R315 C315
C317
R205
R206
R207
(39)
(40)
(42)
(43)
(44)
MICM
R318
1
3
5
7
C206
K0.1
C306 K0.1
C304
NC
TCK
TMS
TDI
TDO
(34)
(35)
(36)
(37)
(38)
R334
C208 10
C303 1.0
R224
(33)
SPM
Handset RX
(MIC Mute: ON)
590mVp-p/150
(Vol. MAX)
R314 C314
2.2K K0.018
K0.1
(32)
R208 10
100
R317
C226
76.KIN_3
R325 18
R333 NC C333 NC
PDN
50.LCD_RESET
99
98
97
96
95
94
93
92
91
90
89
88
87
86
85
84
83
82
81
80
79
78
77
76
C307 NC
RF_RESET
BGPIO12
BGPIO11
MOD_EN
TXO
SERIAL_DI
BGPIO6
FLASH_CS
FLASH_DI
FLASH_DO
FLASH_RESET
RSTN
DCDCOUT
DCDCIN
DCDCGND
GND
VCCIN
VDD
XOUT
XIN
RSSI
BCLK
SPOUTP
IC201
HANDSET SP
SPP
18
100
KIN_3
KIN_4
KIN_5
(25)
(26)
(27)
(28)
(29)
(30)
(31)
1.GNDPA
NC
R323
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
(24)
25.BGPIO15
SPOUTN
VCCPA
HSSPOUTP
HSSPOUTN
HEADSET_DET
HEADSET_MIN
VCCA
GNDA
MIC_PWR
MIN
MIP
VREF
IBAT
PDN
GND
EEPROM_WP
UART_RX
UART_TX
EEPROM_SDA
EEPROM_SCL
CHG_CTRL
AGPIO0
KIN_5
KIN_4
FLASH_CLK
AGPIO1
TALK_LED
VE_LED
BAT_LED
LCD_CS
LCD_WR
LCD_RD
LCD_POWER_CTRL
ANT_LED
KEY_BL
EGPIO6
STB_E
STB_D
STB_C
STB_B
STB_A
GND
VCC
TCK
TMS
TDI
TDO
KIN_1
KIN_2
(23)
SHCTRL
CGPIO4
GND
VCC
SERIAL_LE
SERIAL_CLK
SERIAL_DATA
RXEN
TXEN
RXGAIN
RXDATA
DGPIO10
CHG_DET
OSC_BUF
EEPROM_DET
DGPIO6
DGPIO5
DGPIO4
LCD_DB7
LCD_DB6
LCD_DB5
LCD_DB4
GND
VCC
SP1
R324 NC
51
52
53
54
55
56
57
58
59
60
61
62
STB_E
63
STB_D
64
STB_C
65
STB_B
66
STB_A
67
68
69
70
71
72
73
KIN_1
74
KIN_2
75
(14)
(15)
(16)
(17)
(18)
(19)
(20)
(21)
(22)
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
SP2
+
-
(13)
C332
NC
C205
C225 K0.1
13.824MHz
R201 NC
5
MIC2
CN331
HEADSET-DET
C334
C21410
C215K0.1
X201
NC
NC
10K
NC
L334
1K
(6)
(7)
(8)
(9)
(10)
(11)
4
R225
MIC1
C322 NC
C212
RST
GND
NC
(5)
1
L332
NC
(4)
Q331
NC
NC
K0.01
L211
NC
R351
C340
K0.01
(1)
(2)
(3)
D231 NC
PB0
6
1K
C321
GND
CLK
R3
6.3V3.3
PB1
1K
C231 K0.1
PB4
R2
R352
4
PB2
7
D323 NC
3
GND
PB3
VCC
8
VCC
NC
2
PB5
C1
K0.1
1
1K
+
R1
RST
C997
ANT
3.9nH
L909
D10P
C0.5P
K0.1
C922
C998
2
4
J47P
FL901
3 C911
C996
1
D903
330
18nH
R909
L913
D904
2.4GHz RX
3.3nH
L903
C918
C5P
C910
2.4GHz RF
C0.5P
2.4GHz TX
C938
L904
C940
K0.01
D10P
C939
L911
2.7nH
D10P
C1.5P
C5P
C991
C990
K1000P
C2P
L901
22nH
TP_TESTN
TP_TESTP
C904
TESTP
TESTN
8
VCC_IF2
6
7
VCC_RF
RX
4
5
GND_RX
GND_TX
TX
J100P
C984
C983
K1000P
3
2
1
L905
10nH
C952
C2P
L990
C992
J120P
1uH(1005)
C941
VCC_PA 32
VCC_IF
9
SYN_OUT 31
L902
IC901
12 VCC_BIAS
8
7
2
SYN_DATA 30
11 XIN
K0.1
10 XOUT
K1000P
4
SYN_CLK 28
13 REXT
1
C993
6
RA901 3
1K
SYN_EN 29
5
R906
C944
K0.1
D10P
1K C937
K470P
TC_CTRL 17
VCC_DIG 18
VCC_PLL1A 19
VCC_PLL1B 20
TXEN 21
RXEN 22
VCC_PLL2B 23
VCC_PLL2A 24
D10P
R940
4.7
K0.1
0
R943
2.5V
10
R942
10
R941
2.5V
C980
18nH (PF)
330
R933
1K
R931
1K
R930
1K
R919
1K
R932
GND
GND
OSC_IN
RSSI
RF_RESET
RX_DATA
SHCTRL
TX_EN
RX_EN
RX_GAIN
SDIO
SDATA
SLE
SCLK
TX_DATA
VBATT2
MOD_EN
NC: No Components
KX-TGA243/246 SCHEMATIC DIAGRAM (Handset_RF Part)
C977
R991
TXMOD 27
14 RSSI
10K(1%)
PA_RAMP 26
15 RSTN
C917
4.7uF
(2125)
K1000P
C979
C995
RXGAIN 25
16 RX_DATA
C946
C943
NC
K0.01
10nH (PF)
K1000P
C960
K2200P
C942
C965
C976
NC
C956
C961
C962
C963
C966
C964
K1000P
D10P
NC
D10P
D10P
J220P
96
NC
33 SCHEMATIC DIAGRAM (HANDSET_RF PART)
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
DC-
DC+
DCM
DCP
CN1
DC JACK
L2
4.7
L1 4.7
D1
C2
1u50V
Vin
6V
GND
IC1
Vout
97
Q3
R1
820
C1
1u50V
34 SCHEMATIC DIAGRAM (CHARGER UNIT)
R6
820
0
R2
R3
0
LED1
R7
R9
12
R10
15
R8 1.0K
CM
CP
CHARGE-
CHARGE+
CHARGE PAD
SCHEMATIC DIAGRAM (Charger Unit)
R4
8.2
100
Q2
Q5
Q4
D2
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
Memo
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
98
99
C503
C680
R680
R591
R592
R114
5 INT_1
W_GND
INT1
C201
IO1
Q201 R202
R201
Q202
R533
R671
R670
1
C611
R593
R668
R612
R594
R669
R611
C505 C352
R473 R474
C471 C472
C660
C512
Analog Vcc D
LED Vcc B
SP Vcc C
R687
R686
C612 C685
IC611
C365
C377
C504
31
C120
R134
D133
C515
C516
C513
C174
C172
STB2
CN661
STB4
C179 R178 C178
STB1 STB3
C182 R171 C175
Q131
C132
R133
C101
C102
Q111
D113
C113
R113
D142
R156
R121
C111
C112
C122
P101
SA101
SA104
L300
IC901
SHIELD
C121
R111
R112
C122
L102
L101
C142
C306
C305
L901
C379
C381
C301
C380
ANT
D301
C303
A
PQUP11286Z
CN101
VBATT2 A
KX-TG2820/2822 CIRCUIT BOARD (Base Unit_Main (Component View))
BCK
(13.824MHz)
KIN3 KIN1
KIN2
C176
C173 R175 C551
Q171
C167
C524
C522
R167 R172 R176
R137
D131
R136
R524
C525
R525
R523
R522 Q521
R141
R143
R132
C141
R157
L401
D101
R145
R142
R151
R131
C165
C166
R166
C181 C171 C177
C347
C517 C508 C509
C514
C518
X501
Q143
R164
C163
R517 R509 C521 R521
C342
C184
C183
R183
R163
R184
R185
C185
R165
SP
L402
PbF
INT0
IC501
50
R421
R206
R422
C422
C343 IC332
1 RDY R601 R602
C421
C601
R675
C677
R423
C603
R677
C423
R679
C501 C675
C341
S662
C161
LED677
SA102 SA103
C202
R203
R204
R205
IC201
C663 81
C665
C667
C669
C671
C459
C456 C458 R460
C457 R459
C661
J600
J601
C662
C162
R161
C160
R162
R160
R168
D472
D471
DC 1
IC301
RA500
C664
C666
C668
C670
C672
RA501
Q371
C371
C453 R453
L501 C679
14
R454
C455
C454
R375
L371
CHG
L361
Q141
Digital Vcc E
IC601
C373
Q373
R373
R372
R371
R374
Q372
LED679
S661
Q142
28
15
D371
D361
Q161
Q156
RESET 4
MIC
R364
C361
R365
R361
Q361
D362
Q362
RSSI (RS)
IC331
Vcc 3
Q340
R341
R340
R342 R343
35.1. Component View
35 CIRCUIT BOARD (BASE UNIT_MAIN)
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
JI
JS
JC
VCC
UTX
JG
100
MIP
MIM
JO
URX
35.2. Flow Solder Side View
CP CM
RXD
TXD
PbF
PQUP11286Z
L1R
DCP
A
KX-TG2820/2822 CIRCUIT BOARD (Base Unit_Main (Flow Solder Side View))
SPP SPM
DCM
L1T
ANT1
ANTG1
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
C911
C997
L909
FL901
L903
D904 C918 L911
C942
D903
C998
L913
L904
C938
C939
C940
C910
C996
C991
C904
C943
C984
C983
L901
C941
C990
C993
R919
KX-TG2820/2822 CIRCUIT BOARD (Base Unit_RF Part (Component View))
SHIELD
C964
C963
C979
C962
C976
C977
C961
C956
C995
R932
R941
R942
R943
R940
R931
R930
R933
C937
R991
IC901
RA901
C992
C944
C952
R909
C922
L990
C960
R906
L902 L905
C917
C946
C966
C965
101
C980
36 CIRCUIT BOARD (BASE UNIT_RF PART)
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
Memo
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
102
R376
L352
103
R351
L351
D313
R226
C226
R243 C243
C303 C377
C304
C315 R315
C244
5
RX
TX
VSS VSS
C241 R209
R241
VBATT
C316
R317
R205
76
75
JTAG
C206
C209 RA201
R207
R206 TEST
IC201
R251 R252
51
50
C204
R204
R203
RSSI
L327
C205
D312
Q221
Q231
Q361
Q363
Q362
BCK
(13.824MHz)
R201
RST
(Reset)
RSSI
(pin 4)
D327
D326
L326
L211
R257
R256
R261
Vcc_DSP
2.6V
Q251 RA251Q252 Q253 R258
CI
(pin 79)
PDN
Power_Down
IC249
C314 R314
C312
C317
R368
R312
R234
26
100
R318
C208
R367
C246 R249
1
25
R334
R366
TXO MOE
C336 R340
C201 C215 C212
C305
C333
5
R225
D361
R333
C307
C202
R228
C231C306
C219
C340
C214
R208
R364 R230
C225 RESET
D231 R222 C222
R362
R224
IC221
R232
C224
R231
X201
C221
R363 R361
1
D223 R223
CHG1
C223
C311
C313
IC241
R354
C354
R242
C242
1
Q243
R377
C353
R352
CHG2
VBATT1
2.3~2.9V
(Battery)
37.1. Component View
37 CIRCUIT BOARD (HANDSET_MAIN)
CN331
PbF
C335
1
ANT
SHIELD
FL901
IC901
PQUP11285Z
A
KX-TGA243/246 CIRCUIT BOARD (Handset_Main (Component View))
C272
CA271
R272
R273
C273
CA274
C227
R227
IC374
C382
C383
L334
C321
C334
R324
R325
C322
R323
D324
D323 L331
Q373
L373
IC381
C381
C384
IC373
D373
Q331
C373
C211
C361
L332
R331
R332
C332
C372
IC371
1
C371
CONVERTOR OUT
3.0V
VRF
2.5V
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
RECEIVER
SP_PHONE
PbF
37.2. Flow Solder Side View
4
5
6
7
8
9
TALK
SP
1
LED252
LED254
LEFT
LED251
LED253
BACK
0
PAUSE
MIC
104
MENU
UP
DOWN
2
CN272
CN271
RIGHT
OFF
NEXT
MUTE
3
#
HOLD
PQUP11285Z
A
KX-TGA243/246 CIRCUIT BOARD (Handset_Main (Flow Solder Side View))
LED259
LED258
R402
R401
LED257
LED256
LED255
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
C997
L909
C911
D904 C918 L911
L903
FL901
C998
C938
L913
L904
C942
D903
C996
C991
C939
C940
C910
C984
C993
C964
C963
C979
C962
C976
C977
C961
C956
KX-TGA243/246 CIRCUIT BOARD (Handset_RF Part (Component View))
C995
R932
R941
R942
R943
R940
R931
R930
R933
C937
R991
IC901
RA901
C960 R919
SHIELD
L990
C990
L901
C941
C904
C943
C983
C992
C944
C952
R909
C922
R906
L902 L905
C917
C946
C966
C965
105
C980
38 CIRCUIT BOARD (HANDSET_RF PART)
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
KX-TG2820LAB / KX-TG2822LAB / KX-TGA243LAB / KX-TGA246LAB
39 CIRCUIT BOARD (CHARGER UNIT)
39.1. Component View
D1
R4
E
L1
CN1
Q5
PbF
R2
R9
PQLV30029
PQUP11326Z
C2
R8
R6
LED1
E
R10
E
Q3
Q2
L2
E
Q4
C1
R3
D2
R7
IC1
R1
IN
A
CIRCUIT BOARD (Charger Unit (Component View))
39.2. Flow Solder Side View
PQUP11326Z
WHITE
CHG
CM
PQLV30029
CP
CHG
DCM
DCP
RED
PbF
A
CIRCUIT BOARD (Charger Unit (Flow Solder Side View))
106
H.M./N
KXTG2820LAB-AK
KXTG2822LAB-AK
KXTGA243LAB-AK
KXTGA246LAB-AK