Internal Use Only
North/Latin America
Europe/Africa
Asia/Oceania
http://aic.lgservice.com
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LED TV
SERVICE MANUAL
CHASSIS : LB35B
MODEL : 32LN51**
32LN51**-T*
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO : MFL67732801 (1302-REV00)
Printed in Korea
CONTENTS
CONTENTS . ............................................................................................. 2
SAFETY PRECAUTIONS ......................................................................... 3
SERVICING PRECAUTIONS..................................................................... 4
SPECIFICATION........................................................................................ 6
ADJUSTMENT INSTRUCTION................................................................. 9
BLOCK DIAGRAM................................................................................... 13
EXPLODED VIEW .................................................................................. 14
SCHEMATIC CIRCUIT DIAGRAM ..............................................................
Copyright ©
LG Electronics. Inc. All rights reserved.
Only for training and service purposes
-2-
LGE Internal Use Only
SAFETY PRECAUTIONS
IMPORTANT SAFETY NOTICE
Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts are identified by
in the
Schematic Diagram and Exploded View.
It is essential that these special safety parts should be replaced with the same components as recommended in this manual to prevent
Shock, Fire, or other Hazards.
Do not modify the original design without permission of manufacturer.
General Guidance
Leakage Current Hot Check (See below Figure)
Plug the AC cord directly into the AC outlet.
An isolation Transformer should always be used during the
servicing of a receiver whose chassis is not isolated from the AC
power line. Use a transformer of adequate power rating as this
protects the technician from accidents resulting in personal injury
from electrical shocks.
It will also protect the receiver and it's components from being
damaged by accidental shorts of the circuitry that may be
inadvertently introduced during the service operation.
If any fuse (or Fusible Resistor) in this TV receiver is blown,
replace it with the specified.
When replacing a high wattage resistor (Oxide Metal Film Resistor,
over 1 W), keep the resistor 10 mm away from PCB.
Keep wires away from high voltage or high temperature parts.
Do not use a line Isolation Transformer during this check.
Connect 1.5 K / 10 watt resistor in parallel with a 0.15 uF capacitor
between a known good earth ground (Water Pipe, Conduit, etc.)
and the exposed metallic parts.
Measure the AC voltage across the resistor using AC voltmeter
with 1000 ohms/volt or more sensitivity.
Reverse plug the AC cord into the AC outlet and repeat AC voltage
measurements for each exposed metallic part. Any voltage
measured must not exceed 0.75 volt RMS which is corresponds to
0.5 mA.
In case any measurement is out of the limits specified, there is
possibility of shock hazard and the set must be checked and
repaired before it is returned to the customer.
Leakage Current Hot Check circuit
Before returning the receiver to the customer,
always perform an AC leakage current check on the exposed
metallic parts of the cabinet, such as antennas, terminals, etc., to
be sure the set is safe to operate without damage of electrical
shock.
Leakage Current Cold Check(Antenna Cold Check)
With the instrument AC plug removed from AC source, connect an
electrical jumper across the two AC plug prongs. Place the AC
switch in the on position, connect one lead of ohm-meter to the AC
plug prongs tied together and touch other ohm-meter lead in turn to
each exposed metallic parts such as antenna terminals, phone
jacks, etc.
If the exposed metallic part has a return path to the chassis, the
measured resistance should be between 1 MΩ and 5.2 MΩ.
When the exposed metal has no return path to the chassis the
reading must be infinite.
An other abnormality exists that must be corrected before the
receiver is returned to the customer.
Copyright ©
LG Electronics. Inc. All rights reserved.
Only for training and service purposes
-3-
LGE Internal Use Only
SERVICING PRECAUTIONS
CAUTION: Before servicing receivers covered by this service
manual and its supplements and addenda, read and follow the
SAFETY PRECAUTIONS on page 3 of this publication.
NOTE: If unforeseen circumstances create conflict between the
following servicing precautions and any of the safety precautions
on page 3 of this publication, always follow the safety precautions. Remember: Safety First.
General Servicing Precautions
1. Always unplug the receiver AC power cord from the AC power
source before;
a. Removing or reinstalling any component, circuit board
module or any other receiver assembly.
b. Disconnecting or reconnecting any receiver electrical plug
or other electrical connection.
c. Connecting a test substitute in parallel with an electrolytic
capacitor in the receiver.
CAUTION: A wrong part substitution or incorrect polarity
installation of electrolytic capacitors may result in an explosion hazard.
2. Test high voltage only by measuring it with an appropriate
high voltage meter or other voltage measuring device (DVM,
FETVOM, etc) equipped with a suitable high voltage probe.
Do not test high voltage by "drawing an arc".
3. Do not spray chemicals on or near this receiver or any of its
assemblies.
4. Unless specified otherwise in this service manual, clean
electrical contacts only by applying the following mixture to the
contacts with a pipe cleaner, cotton-tipped stick or comparable
non-abrasive applicator; 10 % (by volume) Acetone and 90 %
(by volume) isopropyl alcohol (90 % - 99 % strength)
CAUTION: This is a flammable mixture.
Unless specified otherwise in this service manual, lubrication
of contacts in not required.
5. Do not defeat any plug/socket B+ voltage interlocks with which
receivers covered by this service manual might be equipped.
6. Do not apply AC power to this instrument and/or any of its
electrical assemblies unless all solid-state device heat sinks
are correctly installed.
7. Always connect the test receiver ground lead to the receiver
chassis ground before connecting the test receiver positive
lead.
Always remove the test receiver ground lead last.
8. Use with this receiver only the test fixtures specified in this
service manual.
CAUTION: Do not connect the test fixture ground strap to any
heat sink in this receiver.
Electrostatically Sensitive (ES) Devices
Some semiconductor (solid-state) devices can be damaged easily by static electricity. Such components commonly are called
Electrostatically Sensitive (ES) Devices. Examples of typical ES
devices are integrated circuits and some field-effect transistors
and semiconductor “chip” components. The following techniques
should be used to help reduce the incidence of component damage caused by static by static electricity.
1. Immediately before handling any semiconductor component or
semiconductor-equipped assembly, drain off any electrostatic
charge on your body by touching a known earth ground. Alternatively, obtain and wear a commercially available discharging wrist strap device, which should be removed to prevent
potential shock reasons prior to applying power to the unit
under test.
Copyright ©
LG Electronics. Inc. All rights reserved.
Only for training and service purposes
2. After removing an electrical assembly equipped with ES
devices, place the assembly on a conductive surface such as
aluminum foil, to prevent electrostatic charge buildup or exposure of the assembly.
3. Use only a grounded-tip soldering iron to solder or unsolder
ES devices.
4. Use only an anti-static type solder removal device. Some solder removal devices not classified as “anti-static” can generate
electrical charges sufficient to damage ES devices.
5. Do not use freon-propelled chemicals. These can generate
electrical charges sufficient to damage ES devices.
6. Do not remove a replacement ES device from its protective
package until immediately before you are ready to install it.
(Most replacement ES devices are packaged with leads electrically shorted together by conductive foam, aluminum foil or
comparable conductive material).
7. Immediately before removing the protective material from the
leads of a replacement ES device, touch the protective material to the chassis or circuit assembly into which the device will
be installed.
CAUTION: Be sure no power is applied to the chassis or circuit, and observe all other safety precautions.
8. Minimize bodily motions when handling unpackaged replacement ES devices. (Otherwise harmless motion such as the
brushing together of your clothes fabric or the lifting of your
foot from a carpeted floor can generate static electricity sufficient to damage an ES device.)
General Soldering Guidelines
1. Use a grounded-tip, low-wattage soldering iron and appropriate tip size and shape that will maintain tip temperature within
the range or 500 °F to 600 °F.
2. Use an appropriate gauge of RMA resin-core solder composed
of 60 parts tin/40 parts lead.
3. Keep the soldering iron tip clean and well tinned.
4. Thoroughly clean the surfaces to be soldered. Use a mall wirebristle (0.5 inch, or 1.25 cm) brush with a metal handle.
Do not use freon-propelled spray-on cleaners.
5. Use the following unsoldering technique
a. Allow the soldering iron tip to reach normal temperature.
(500 °F to 600 °F)
b. Heat the component lead until the solder melts.
c. Quickly draw the melted solder with an anti-static, suctiontype solder removal device or with solder braid.
CAUTION: Work quickly to avoid overheating the circuit
board printed foil.
6. Use the following soldering technique.
a. Allow the soldering iron tip to reach a normal temperature
(500 °F to 600 °F)
b. First, hold the soldering iron tip and solder the strand
against the component lead until the solder melts.
c. Quickly move the soldering iron tip to the junction of the
component lead and the printed circuit foil, and hold it there
only until the solder flows onto and around both the component lead and the foil.
CAUTION: Work quickly to avoid overheating the circuit
board printed foil.
d. Closely inspect the solder area and remove any excess or
splashed solder with a small wire-bristle brush.
-4-
LGE Internal Use Only
IC Remove/Replacement
Some chassis circuit boards have slotted holes (oblong) through
which the IC leads are inserted and then bent flat against the circuit foil. When holes are the slotted type, the following technique
should be used to remove and replace the IC. When working with
boards using the familiar round hole, use the standard technique
as outlined in paragraphs 5 and 6 above.
Removal
1. Desolder and straighten each IC lead in one operation by
gently prying up on the lead with the soldering iron tip as the
solder melts.
2. Draw away the melted solder with an anti-static suction-type
solder removal device (or with solder braid) before removing
the IC.
Replacement
1. Carefully insert the replacement IC in the circuit board.
2. Carefully bend each IC lead against the circuit foil pad and
solder it.
3. Clean the soldered areas with a small wire-bristle brush.
(It is not necessary to reapply acrylic coating to the areas).
"Small-Signal" Discrete Transistor
Removal/Replacement
1. Remove the defective transistor by clipping its leads as close
as possible to the component body.
2. Bend into a "U" shape the end of each of three leads remaining on the circuit board.
3. Bend into a "U" shape the replacement transistor leads.
4. Connect the replacement transistor leads to the corresponding
leads extending from the circuit board and crimp the "U" with
long nose pliers to insure metal to metal contact then solder
each connection.
Power Output, Transistor Device
Removal/Replacement
1. Heat and remove all solder from around the transistor leads.
2. Remove the heat sink mounting screw (if so equipped).
3. Carefully remove the transistor from the heat sink of the circuit
board.
4. Insert new transistor in the circuit board.
5. Solder each transistor lead, and clip off excess lead.
6. Replace heat sink.
Diode Removal/Replacement
1. Remove defective diode by clipping its leads as close as possible to diode body.
2. Bend the two remaining leads perpendicular y to the circuit
board.
3. Observing diode polarity, wrap each lead of the new diode
around the corresponding lead on the circuit board.
4. Securely crimp each connection and solder it.
5. Inspect (on the circuit board copper side) the solder joints of
the two "original" leads. If they are not shiny, reheat them and
if necessary, apply additional solder.
3. Solder the connections.
CAUTION: Maintain original spacing between the replaced
component and adjacent components and the circuit board to
prevent excessive component temperatures.
Circuit Board Foil Repair
Excessive heat applied to the copper foil of any printed circuit
board will weaken the adhesive that bonds the foil to the circuit
board causing the foil to separate from or "lift-off" the board. The
following guidelines and procedures should be followed whenever this condition is encountered.
At IC Connections
To repair a defective copper pattern at IC connections use the
following procedure to install a jumper wire on the copper pattern
side of the circuit board. (Use this technique only on IC connections).
1. Carefully remove the damaged copper pattern with a sharp
knife. (Remove only as much copper as absolutely necessary).
2. carefully scratch away the solder resist and acrylic coating (if
used) from the end of the remaining copper pattern.
3. Bend a small "U" in one end of a small gauge jumper wire and
carefully crimp it around the IC pin. Solder the IC connection.
4. Route the jumper wire along the path of the out-away copper
pattern and let it overlap the previously scraped end of the
good copper pattern. Solder the overlapped area and clip off
any excess jumper wire.
At Other Connections
Use the following technique to repair the defective copper pattern
at connections other than IC Pins. This technique involves the
installation of a jumper wire on the component side of the circuit
board.
1. Remove the defective copper pattern with a sharp knife.
Remove at least 1/4 inch of copper, to ensure that a hazardous
condition will not exist if the jumper wire opens.
2. Trace along the copper pattern from both sides of the pattern
break and locate the nearest component that is directly connected to the affected copper pattern.
3. Connect insulated 20-gauge jumper wire from the lead of the
nearest component on one side of the pattern break to the
lead of the nearest component on the other side.
Carefully crimp and solder the connections.
CAUTION: Be sure the insulated jumper wire is dressed so the
it does not touch components or sharp edges.
Fuse and Conventional Resistor
Removal/Replacement
1. Clip each fuse or resistor lead at top of the circuit board hollow
stake.
2. Securely crimp the leads of replacement component around
notch at stake top.
Copyright ©
LG Electronics. Inc. All rights reserved.
Only for training and service purposes
-5-
LGE Internal Use Only
SPECIFICATION
NOTE : Specifications and others are subject to change without notice for improvement.
1. Application range
3. Test method
This specification is applied to the LB35B chassis.
1) Performance: LGE TV test method followed
2) Demanded other specification
- Safety : CE, IEC specification
- EMC : CE, IEC
2. Requirement for Test
Each part is tested as below without special appointment.
(1) Temperature: 25 °C ± 5 °C(77 °F ± 9 °F), CST: 40 °C ± 5 °C
(2) Relative Humidity: 65 % ± 10 %
(3) Power Voltage
: Standard input voltage (AC 100-240 V~, 50/60 Hz)
* Standard Voltage of each products is marked by models.
(4) Specification and performance of each parts are followed
each drawing and specification by part number in
accordance with BOM.
(5) The receiver must be operated for about 5 minutes prior to
the adjustment.
4. Model General Specification
* HDMI 1.4 with Deep Color is only apply for FHD Model
No.
Item
Specification
Remarks
1.
Market
NON EU
2.
Broadcasting system
PAL/SECAM B/G/D/K
PAL-I
NTSC-M
3.
Channel Storage
4.
Receiving system
Upper Heterodyne
5.
Video Input
PAL, SECAM, NTSC
Rear (2EA)
6.
Component Input
Y/Cb/Cr, Y/Pb/Pr
Rear (1EA)
7.
USB Input
MP3, JPEG,Movie
Side(1EA)
8.
AV Audio Output
RF/AV/HDMI Audio Output
Rear (1EA)
9.
D-SUB INPUT
S/W Upgrade Only
Rear (1EA)
10.
HDMI Input
HDMI-DTV, Only PCM MODE
Rear (2EA)
11.
Audio Input (1EA)
AV&Component
L/R Input(2EA)
BAND
PAL(BG,I)
NTSC(M)
China(DK)
VHF/UHF
01-C69
2~78
C1~C69
Cable
S1~S47
1~71
S1~S47
Copyright ©
LG Electronics. Inc. All rights reserved.
Only for training and service purposes
-6-
LGE Internal Use Only
5. Component Video Input (Y, PB, PR)
No.
Resolution
H-freq(kHz)
V-freq(Hz)
Pixel clock(MHz)
Proposed
1.
720*480
15.73
59.94
13.500
SDTV, DVD 480I(525I)
2.
720*480
15.75
60.00
13.514
SDTV, DVD 480I(525I)
3.
720*576
15.625
50.00
13.500
SDTV, DVD 576I(625I) 50Hz
4.
720*480
31.47
59.94
27.000
SDTV 480P
5.
720*480
31.50
60.00
27.027
SDTV 480P
6.
720*576
31.25
50.00
27.000
SDTV 576P 50Hz
7.
1280*720
44.96
59.94
74.176
HDTV 720P
8.
1280*720
45.00
60.00
74.250
HDTV 720P
9.
1280*720
37.50
50.00
74.25
HDTV 720P 50Hz
10.
1920*1080
28.125
50.00
74.250
HDTV 1080I 50Hz,
11.
1920*1080
33.72
59.94
74.176
HDTV 1080I
12.
1920*1080
33.75
60.00
74.25
HDTV 1080I
13.
1920*1080
56.25
50
148.5
HDTV 1080P
14.
1920*1080
67.432
59.94
148.350
HDTV 1080P
15.
1920*1080
67.5
60.00
148.5
HDTV 1080P
6. HDMI Input
6.1. PC Mode
* Spec. out but it can be shown the picture at only HDMI/DVI IN 1 via DVI to HDMI Cable
No.
H-freq(kHz)
V-freq.(Hz)
Pixel clock(MHz)
1.
640×480
Resolution
31.469
59.94
25.17
VESA(VGA)
Proposed
2.
800×600
37.879
60.317
40.00
VESA(SVGA)
3.
1024×768
48.363
60.004
65.00
VESA(XGA)
4.
1280×768
47.776
59.87
79.5
VESA(WXGA)
5.
1360×768
47.72
59.799
84.62
VESA(WXGA)
6
1366×768
47.7
60.00
84.62
WXGA
7.
1280×1024
63.595
60.00
108.875
SXGA
8.
1920×1080
66.647
59.988
138.625
WUXGA
Remarks
* Monitor Range Limits
Min Vertical Freq - 58 Hz / Max Vertical Freq - 63 Hz
Min Horiz. Freq - 28 kHz / Max Horiz. Freq - 68 kHz
Pixel Clock - 150 MHz
Copyright ©
LG Electronics. Inc. All rights reserved.
Only for training and service purposes
-7-
LGE Internal Use Only
6.2. DTV Mode
No.
H-freq(kHz)
V-freq.(kHz)
Pixel clock(MHz)
1.
720*480
Resolution
15.73
59.94
13.500
SDTV, DVD 480I(525I)
Proposed
2.
720*480
15.75
60.00
13.514
SDTV, DVD 480I(525I)
3.
720*576
15.625
50.00
13.500
SDTV, DVD 576I(625I) 50Hz
4.
720*480
31.47
59.94
27
SDTV 480P
5.
720*480
31.5
60.00
27.027
SDTV 480P
6.
720*576
31.25
50.00
27
SDTV 576P
7.
1280*720
44.96
59.94
74.176
HDTV 720P
8.
1280*720
45
60.00
74.25
HDTV 720P
9.
1280*720
37.5
50.00
74.25
HDTV 720P
10.
1920*1080
28.125
50.00
74.25
HDTV 1080I
11
1920*1080
33.72
59.94
74.176
HDTV 1080I
12
1920*1080
33.75
60.00
74.25
HDTV 1080I
13
1920*1080
56.25
50.00
148.5
HDTV 1080P
14
1920*1080
67.432
59.94
148.350
HDTV 1080P
15
1920*1080
67.5
60.00
148.5
HDTV 1080P
16
1920*1080
27
24.00
74.25
HDTV 1080P
17
1920*1080
33.75
30.00
74.25
HDTV 1080P
18
1920*1080
26.97
23.97
74.25
HDTV 1080P
19
1920*1080
33.716
29.976
74.25
HDTV 1080P
Copyright ©
LG Electronics. Inc. All rights reserved.
Only for training and service purposes
-8-
Remarks
Spec. out but display.
LGE Internal Use Only
ADJUSTMENT INSTRUCTION
1. Application Range
This specification sheet is applied to all of the LED TV with
LB35B chassis.
3.2. EDID Download
2. Designation
(1) Because this is not a hot chassis, it is not necessary to
use an isolation transformer. However, the use of isolation
transformer will help protect test instrument.
(2) Adjustment must be done in the correct order.
(3) The adjustment must be performed in the circumstance of
25 °C ± 5 °C of temperature and 65 % ± 10 % of relative
humidity if there is no specific designation.
(4) The input voltage of the receiver must keep 100-220 V,
50/60Hz.
(5) The receiver must be operated for over 5 minutes prior to
the adjustment when module is in the circumstance of
above 15 °C.
► In case of keeping module is in the circumstance of 0
°C, it should be placed in the circumstance of above 15
°C for 2 hours.
► In case of keeping module is in the circumstance of
below -20 °C, it should be placed in the circumstance of
above 15 °C for 3 hours.
* Caution
When a still image is displayed for 20 minutes or longer
(especially where W/B scale is strong. Digital pattern 13ch
and/or Cross hatch pattern 09ch), there can some
afterimage in the black level area.
3. MAIN PCBA Adjustments
3.1. ADC Calibration
3.1.1. Using D/L Jig
- An ADC calibration is automatically adjusted from DFT-Jig
- If it needs to adjust manually, refer to appendix.
Item
Enter Adjust
MODE
Adjust
‘Mode In’
ADC adjust
ADC
Adjust
A
A
D
0
1
1
FF
17
49
01
00
88
20
3A
03
22
0C
80
10
F0
18
00
2
FF
01
4B
01
C4
35
54
3F
28
1F
00
35
10
16
71
00
3
FF
03
21
01
8E
00
56
1C
F1
10
10
00
3E
00
1C
00
4
FF
80
08
01
21
BC
0A
44
4F
26
00
BC
96
26
16
00
** HDMI 1 : 256Bytes
5
6
7
8
9
FF FF 00 1E 6D
A0 5A 78 0A F3
00 45 40 01 01
01 01 1D 00 72
00 00 1E 1B 21
77 21 00 00 1C
20 20 20 20 20
0F 00 0A 20 20
84 07 01 16 02
11 07 50 09 7F
80 1E 00 01 1D
88 21 00 00 1E
00 13 8E 21 00
7C 43 00 C4 8E
20 58 2C 25 00
00 00 00 00 00
A
01
30
61
51
50
00
20
20
03
07
00
8C
00
21
C4
00
B
00
A4
40
D0
A0
00
20
20
11
83
80
0A
18
00
8E
00
C
01
54
01
1E
51
00
00
20
12
01
51
D0
8C
00
21
00
D
01
46
01
20
00
FC
00
20
13
00
D0
8A
0A
98
00
00
E
01
96
01
6E
1E
00
00
01
14
00
1C
20
A0
01
00
00
F
01
26
01
28
30
4C
FD
ⓐ
05
68
20
E0
14
1D
9E
ⓐ
5
FF
A0
00
01
00
88
20
0F
90
11
80
88
00
7C
20
00
A
01
B0
61
71
50
00
20
20
03
07
00
8C
00
21
C4
00
B
00
A3
40
38
A0
00
20
20
11
83
80
0A
18
00
8E
00
C
01
57
01
2D
51
00
00
20
12
01
51
D0
8C
00
21
00
D
01
49
01
40
00
FC
00
20
13
00
D0
8A
0A
98
00
00
E
01
9C
81
58
1E
00
00
01
04
00
1C
20
A0
01
00
00
F
01
25
80
2C
30
4C
FD
ⓐ
14
68
20
E0
14
1D
9E
ⓐ
▪ 8BIT FHD MODEL
** HDMI 1 : 256Bytes
0
1
2
3
0 00 FF FF FF
10 01 17 01 03
20 11 49 4B 21
30 01 01 D1 C0
40 45 00 08 44
50 48 88 35 00
60 47 20 54 56
70 00 3A 3F 1C
80 02 03 28 F1
90 05 20 22 1F
A0 03 0C 00 10
B0 40 80 35 00
C0 2D 10 10 3E
D0 51 F0 16 00
E0 80 18 71 1C
F0 00 00 00 00
4
FF
80
08
01
21
BC
0A
44
4F
26
00
BC
96
26
16
00
6
FF
5A
01
02
00
21
20
00
07
07
1E
21
13
43
58
00
EDID C/S data
CMD 1 CMD 2 Data 0
A
0
10
20
30
40
50
60
70
80
90
A0
B0
C0
D0
E0
F0
0
00
01
0F
01
55
48
47
00
02
20
03
40
2D
51
80
00
0
When transfer the ‘Mode In’,
Carry the command.
0
Automatically adjustment
(The use of a internal pattern)
Block 0
Check sum
(Hex)
Block 1
Adjust Sequence
▪ aa 00 00 [Enter Adjust Mode]
▪ xb 00 40 [Component1 Input (480i)]
▪ ad 00 10 [Adjust 480i Comp1]
▪ aa 00 90 End Adjust mode
Copyright ©
LG Electronics. Inc. All rights reserved.
Only for training and service purposes
7
00
78
01
3A
1E
00
20
0A
01
50
00
00
8E
00
2C
00
8
1E
0A
45
80
1B
00
20
20
16
09
01
00
21
C4
25
00
9
6D
D9
40
18
21
1C
20
20
02
7F
1D
1E
00
8E
00
00
a. White Balance Adjustment
* ADC Calibration Protocol (RS232)
NO
▪ HD MODEL
-9-
HD
HDMI
A5
44(HDMI1)
34(HDMI2)
FHD (8Bit)
HDMI
C1
44 (HDMI1)
34 (HDMI2)
LGE Internal Use Only
4. White Balance Adjustment
(2) Adjustment Map
4.1. Overview
Adj. item
4.1.1. W/B adj. Objective & How-it-works
(1) Objective: To reduce each Panel’s W/B deviation
(2) How-it-works: When R/G/B gain in the OSD is at 192, it
means the panel is at its Full Dynamic Range. In order to
prevent saturation of Full Dynamic range and data, one of
R/G/B is fixed at 192, and the other two is lowered to find
the desired value.
(3) Adj. condition: normal temperature
1) Surrounding Temperature: 25 °C ± 5 °C
2) Warm-up time: About 5 Min◦
3) Surrounding Humidity: 20% ~ 80%
4) B efore White balance adjustment, Keep power on
status, don’t power off
Cool
Medium
4.1.2. Adj. condition and cautionary items
(1) Lighting condition in surrounding area surrounding lighting
should be lower 10 lux.
Try to isolate adj. area into dark surrounding.
(2) P
robe location: Color Analyzer(CA-210) probe should be
within 10 cm and perpendicular of the module surface
(80°~ 100°)
(3) Aging time
1) After Aging Start, Keep the Power ON status during 5
Minutes.
2) In case of LCD, Back-light on should be checked using
no signal or Full-white pattern.
Warm
00
00
00
C0
C0
C0
j
j
j
d
e
f
00
00
00
C0
C0
C0
(1) Set TV in ADJ mode using P-Only key(or POWER ON key).
(2) Place optical probe on the center of the display.
- It need to check probe condition of zero calibration before
adjustment.
(3) Connect RS-232C Cable
(4) Select mode in ADJ Program and begin a adjustment.
(5) When WB adjustment is completed with OK message,
check adjustment status of pre-set mode. (Cool, Medium,
Warm)
(6) Remove probe and RS-232C cable.
▪ W/B Adj. must begin as start command “wb 00 00” , and
finish as end command “wb 00 ff”, and Adj. offset if need.
4.5.2. LED White balance table
RS -232C
Co m p ut er
RS -232C
Pat t ern Generat o r
- G-gain should be fixed.
(1) Cool Mode
1) Purpose : Adjust the color temperature to reduce the
deviation of the module color temperature.
2) P rinciple : To adjust the white balance without the
saturation, Fix the G gain to 172 (default data) and
change the others (R/B Gain ).
3) Adjustment mode : mode - Cool
(2) Medium / Warm Mode
1) Purpose : Adjust the color temperature to reduce the
deviation of the module color temperature.
2) P rinciple : To adjust the white balance without the
saturation, Fix the one of R/G/B gain to 192 (default
data) and decrease the others.
3) Adjustment mode : Two modes - Medium / Warm
Signal Source
* If TV internal pattern is used, not needed
4.4. Adjustment Command (Protocol)
(1) RS-232C Command used during auto-adj.
RS-232C COMMAND
a
b
c
4.5.1. Auto WB calibration
Co lo r Analyzer
RS -232C
j
j
j
Default
(Decimal)
4.5. Adjustment method
4.3. Equipment connection
Probe
Data Range
(Hex.)
MIN
MAX
00
C0
00
C0
00
C0
G Cut
4.2. Equipment
(1) Color Analyzer: CA-210 (NCG: CH 9 / WCG: CH12 / LED:
CH14)
(2) A dj. Computer (During auto adj., RS-232C protocol is
needed)
(3) Adjust Remocon
(4) Video Signal Generator MSPG-925F 720p/204-Gray
(Model: 217, Pattern: 49)
* Color Analyzer Matrix should be calibrated using CS-1000.
R Gain
G Gain
B Gain
R Cut
G Cut
B Cut
R Gain
G Gain
B Gain
R Cut
G Cut
B Cut
R Gain
G Gain
B Gain
R Cut
Command
(lower caseASCII)
CMD1
CMD2
j
g
j
h
j
i
Explantion
CMD
DATA
ID
wb
00
00
Begin White Balance adjustment
wb
00
ff
End White Balance adjustment
(internal pattern disappears )
Copyright ©
LG Electronics. Inc. All rights reserved.
Only for training and service purposes
- 10 -
LGE Internal Use Only
4.6. Reference(White Balance Adjustment
coordinate and color temperature)
(1) Luminance: 204 Gray, 80IRE
(2) S tandard color coordinate and temperature using
CS-1000 (over 26 inch)
Mode
Color Temp
Color coordinate
Cool
(C50)
13,000 K
x = 0.269 (±0.002)
y = 0.273 (±0.002)
Medium
(0)
9,300 K
x = 0.285 (±0.002)
y = 0.293 (±0.002)
Warm
(W50)
6,500 K
x = 0.313 (±0.002)
y = 0.329 (±0.002)
(Direct
LED)
x
y
x
y
x
y
276
287
296
315
332
7.3. Checkpoint
■ 42” POLA LED W/B adjust target value (42LS3450 series)
Cool
Medium
Warm
Target
(Direct
LED)
x
y
x
y
x
y
274
280
290
300
318
336
(1) Check the POWER CABLE and SIGNAL CABE insertion
condition
(1) Pallet moves in the station. (POWER CORD / AV CORD is
tightly inserted)
(2) Connect the AV JACK Tester.
(3) Controller (GWS103-4) on.
(4) GND Test (Auto)
- If Test is failed, Buzzer operates.
- If Test is passed, execute next process (Hi-pot test).
(Remove A/V CORD from A/V JACK BOX)
(5) HI-POT test (Auto)
- If Test is failed, Buzzer operates.
- If Test is passed, GOOD Lamp on and move to next
process automatically.
* Test signal
- Inner pattern for
W/B adjust
- External white
pattern
(80IRE, 204gray)
271
7.1. GND & HI-POT auto-check preparation
7.2. GND & HI-POT auto-check
Remark
■ Direct LED & 32” POLA W/B adjust target value
Cool
Medium
Warm
Target
7. GND and HI-POT Test
5. Tool Option setting & Inspection per
countries
(1) Test voltage
- GND: 1.5 KV / min at 100 mA
- SIGNAL: 3 KV / min at 100 mA
(2) TEST time: 1 second
(3) TEST POINT
-G
ND Test = POWER CORD GND and SIGNAL CABLE
GND.
-H
i-pot Test = POWER CORD GND and LIVE &
NEUTRAL.
(4) LEAKAGE CURRENT: At 0.5 mArms
(1) Press 'IN START' key at Factory Service remote control.
(2) Select 'Tool Option 1'.
(3) Punch in the number and press 'OK'. (Each of models has
their number)
(4) Correct 'Tool Option2' ~ 'Tool Option5'.
(5) Completed adjusting Tool option.
6. AUDIO output check
6.1. Audio input condition
(1) RF input: Mono, 1KHz sine wave signal, 100% Modulation
(2) CVBS, Component: 1KHz sine wave signal (0.4Vrms)
(3) RGB PC: 1KHz sine wave signal (0.7Vrms)
6.2. Specification
Item
Min
Typ
Max
Unit
Remark
Audio practical
max Output, L/R
(Distortion=10%
max Output)
4.5
5.0
6.0
W
Vrms
(1) Measurement condition
- EQ/AVL/Clear Voice: Off
(2) Speaker (8Ω Impedance)
Copyright ©
LG Electronics. Inc. All rights reserved.
Only for training and service purposes
- 11 -
LGE Internal Use Only
8. USB S/W Download
9. Optional adjustments
(optional, Service only)
9.1. Manual ADC Calibration
■ Enter ‘EZ ADJUST’ mode by pressing ‘ADJ’ key.
■ Enter Internal ADC calibration mode by pressing ‘’ or ‘OK’
key at ‘7. ADC Calibration’
(1) Put the USB Stick to the USB socket.
(2) Automatically detecting update file in USB Stick.
- If your downloaded program version in USB Stick is lower
than that of TV set, it didn’t work.
Otherwise USB data is automatically detected.
(3) Show the message “Copying files from memory”.
ADC Calibration
EZ ADJUST
0. Tool Option1
NG
ADC Comp 480i
1. Tool Option2
2. Tool Option3
3. Tool Option4
4. Tool Option5
ADC Comp 1080p
NG
ADC RGB
NG
Start
5. Tool Option Commercial
Reset
6. Country Group
7. Area Option
8. ADC Calibration
►
9. White Balance
10. 10 Point WB
11. Test Pattern
12. EDID D/L
13. Sub B/C
14. Ext. Input Adjust
► Caution : U sing ‘P-ONLY’ key of the Factory Service
remote control when turns TV on.
9.2. Manual White balance Adjustment
9.2.1. Adjustment condition and cautionary items
(4) Updating is starting.
(5) Updating Completed, The TV will restart automatically.
(6) If your TV is turned on, check your updated version and
Tool option. (explain the Tool option, next stage)
* If downloading version is more high than your TV have,
TV can lost all channel data. In this case, you have to
channel recover. if all channel data is cleared, you didn't
have a DTV/ATV test on production line.
* After downloading, have to adjust TOOL OPTION again.
1) Push "IN-START" key in service remote control.
2) Select "Tool Option 1" and push "OK" key.
3) Punch in the number. (Each model has their number.)
(1) Lighting condition in surrounding area surrounding lighting
should be lower 10 lux. Try to isolate adj. area into dark
surrounding.
(2) Probe location: Color Analyzer (CA-210) probe should be
within 10cm and perpendicular of the module surface
(80°~ 100°)
(3) Aging time
1) After Aging Start, Keep the Power ON status during 5
Minutes.
2) In case of LCD, Back-light on should be checked using
no signal or Full-white pattern.
9.2.2. Equipment
(1) Color Analyzer: CA-210 (NCG: CH 9 / WCG: CH12 / LED:
CH14)
(2) Adj. Computer(During auto adj., RS-232C protocol is needed)
(3) Adjust Remot control
(4) Video Signal Generator MSPG-925F 720p/216-Gray
(Model: 217, Pattern: 78)
9.2.3. Adjustment
(1) Set TV in Adj. mode using POWER ON.
(2) Zero Calibrate the probe of Color Analyzer, then place it on
the center of LCD module within 10cm of the surface.
(3) Press ADJ key → EZ adjust using adj. R/C → 6. WhiteBalance then press the cursor to the right (Key►). When
Key(►) is pressed 216 Gray internal pattern will be
displayed.
(4) One of R Gain / G Gain / B Gain should be fixed at 192,
and the rest will be lowered to meet the desired value.
(5) Adj. is performed in COOL, MEDIUM, WARM 3 modes of
color temperature.
■ If internal pattern is not available, use RF input. In EZ Adj.
menu 6.White Balance, you can select one of 2 Test-pattern:
ON, OFF. Default is inner(ON). By selecting OFF, you can
adjust using RF signal in 216 Gray pattern.
Copyright ©
LG Electronics. Inc. All rights reserved.
Only for training and service purposes
- 12 -
LGE Internal Use Only
- 13 -
Main_5V
P301
LPF
LPF
40 35
30
21
18
IC301
10 11
38
9
8
7
EEP SCL
Audio_SCL
JK203
JK204
HDMI
SCL/SDA
113 112
9 116 107
41 30 18 100
77 62 54
EEP SDA
SPI_CLK
SPI_DI
SPI_CZ
SPI_DO
84
48
115
50
51
1
RL On
102 105 101
Inv. ON
85
94
95
97
96
Audio_SDA
I2S_MCLK
I2S_WS
I2S_SCK
I2S_SDO
IC711 Main_1.8V
1.8V REG
To USB
Sound AMP
NTP7513
33
32 19
31 20
S_AMP_24V
Q710
Main_3.3V
Main_1.2V
IC701
MP20051
IC709
MP1497
IC503
EEPROM
24C64
IC502
Serial Flash
8Mbytes
Panel_Vcc
Q720
AO3407A
4
P Dim
2
XXX
LVDS
Output
P400
108
Led_PWR
26,33,34 27,35,36
IR/KEY
117 111 110
IR
22,20,24,33,34
IC501
MST6841XP
XXX
P601/602
KEY2
P701
KEY1
13~15
ST_3.5V
38
IF_AGC
10
B+
5
Tuner SDA
Tuner SCL
TUNER
4
3
9
24Mhz
USB_DN
USB_DP
USB_5V
7
11
IF_N
JK101
M_3.3V
OP-AMP
A_OUT_12V
IC302
TU_1.8V
x4 Gain Audio
TU_3.3V
Out
IC401
To USB
37
52
53
45
40
39
43
44
99
98
IR Board
JK202
((
((
3
5
Audio L-Out
9 10
Audio R-Out
Module
Y,Pb,Pr In
Copyright ©
LG Electronics. Inc. All rights reserved.
Only for training and service purposes
Comp. R/L In
P_ST 3.5V
AV1 In
P_12V
AV2 In
IF_P
POWER BOARD
BLOCK DIAGRAM
P_24V
LGE Internal Use Only
EXPLODED VIEW
IMPORTANT SAFETY NOTICE
900
32LN510*/511*/512*/513*
A10
Set + Stand
A9
Stand Base
+
Stand Body
A2
300
301
500
200
122
123
530
LV1
540
120
521
510
910
400
32LN515*
Many electrical and mechanical parts in this chassis have special safety-related characteristics. These
parts are identified by
in the Schematic Diagram and EXPLODED VIEW.
It is essential that these special safety parts should be replaced with the same components as
recommended in this manual to prevent X-RADIATION, Shock, Fire, or other Hazards.
Do not modify the original design without permission of manufacturer.
Copyright ©
LG Electronics. Inc. All rights reserved.
Only for training and service purposes
- 14 -
LGE Internal Use Only
EAX65027101
LB35B/LC35B/LL35B
COMPONENT / AV IN / AV AUDIO OUT
JK101
PPJ239-06
7H
6H
AV2RIN
R117
ZD110
20V
R116
220K
AV2_RIN
10K
R118
12K
C108
470pF
50V
4H
5G
AV2LIN
R114
ZD109
20V
R113
220K
AV2_LIN
10K
R115
12K
C107
470pF
50V
4F
6F
AV2_VIN
AV2_VIN
D101
READY
8F
5E
R112
75
ZD108
SD05
D102
READY
MNTROUT
8E
C106
R111
1K
C105
5600pF
50V
ZD107
20V
C
E
Q103
C
E
B
B
MMBT3904(NXP)
10uF
16V
POP
MNT_ROUT
MUTE_AOUT
NOISE
READY
Q104
MMBT3904(NXP)
5D
MNTLOUT
C104
R110
ZD106
20V
7D
1K
C103
5600pF
50V
C
E
C
B
B
Q101
MNT_LOUT
10uF
16V
MMBT3904(NXP)
E
POP
MUTE_AOUT
NOISE
READY
Q102
MMBT3904(NXP)
7N
6N
R108
COMMONRIN
ZD105
20V
R107
220K
ZD104
20V
R104
220K
10K
COMMON_RIN
R109
12K
C102
470pF
50V
R106
12K
C101
470pF
50V
4N
5M
5L
R105
COMMONLIN
10K
COMMON_LIN
COMP_PR
COMP_PR
8L
D103
READY
ZD102
SD05
R103
75
ZD101
SD05
R102
75
D104
READY
5K
COMP_PB
D105
READY
8K
D106
READY
COMP_PB
V-OUT Buffer(DEBUG)
4J
6J
COMMON_VIN
D107
READY
7J
D108
READY
COMMON_VIN
ZD100
SD05
P_12V
R101
75
DEBUG
AV2_VIN
OPT
TP101
R122
0
C
E
B
MMBT3904(NXP)
Q105
R121
33
DEBUG
MNT_VOUT
DEBUG
R120
75
DEBUG
R123
220
THE
SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE
SYMBOL MARK OF THE SCHEMETIC.
32LN5100
INPUT1
2012/11/15
1
7
INPUT1
Copyright © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only
EAX65027101
LB35B/LC35B/LL35B
HDMI(REAR)
I2C Control
R231
1K
KJA-PH-1-0177
JK201
HDMI1_HPD
With UART IC
C
R230
10K
+3.5V_ST
MMBT3904(NXP)
1
M1
3
M3_DETECT
4
M4
MAX3232CDR
R206
16
1
C1+
R205
0
W/O UART IC
M5_GND
GND
With UART IC
R201
100
R204
0
DOUT1
R202
100
RIN1
15
2
14
3
13
4
V+
C1-
C203
0.1uF
DEBUG
P201
DIN1
12505WS-04A00
DIN2
12
5
11
6
10
7
9
8
D230
BAT54C
HDMI1_DET
READY
ZD230
SHIELD
With UART IC
20
19 HPD
R234
4.7K
18 +5V_POWER
C2+
With UART IC
ROUT1
With UART IC
C202
0.1uF
C
VCC
C201
0.1uF
W/O UART IC
5
0
W/O UART IC
A2
M6
+5V_USB
E
A1
6
Q230
B
IC201
C2-
R232 R233
2.7K 2.7K
READY
ZD231
16 SDA
C204
0.1uF
V-
DOUT2
17 DDC/CEC_GND
With UART IC
R235
10K
READY
ZD232
R236
100
R237
100
15 SCL
14 NC
With UART IC
READY
ZD233
13 CEC
12 CLK-
C205
0.1uF
HDMI1_SDA
HDMI1_SCL
HDMI1_CK-
11 CLK_SHIELD
1
ROUT2
RIN2
10
2
EAN41348201
9
8
3
7
CLK+
HDMI1_CK+
HDMI1_D0-
DATA0DATA0_SHIELD
DATA0+
HDMI1_D0+
HDMI1_D1-
DATA1-
4
6
P202
+3.5V_ST
5
12507WS-04L
VCC
PM_RXD
GND
RM_TXD
5
4
1
DATA1_SHIELD
DATA1+
HDMI1_D1+
HDMI1_D2-
3 DATA2DATA2_SHIELD
2
DATA2+
1
2
HDMI1_D2+
3
JK203
4
DSUB_SCL
DSUB_SDA
5
GND
R242
1K
Q240
B
MMBT3904(NXP)
+5V_USB
A1
E
D240
BAT54C
HDMI2_DET
C
READY
ZD240
A2
HDMI2_HPD
C
R241
10K
SHIELD
20
19 HPD
USB(SIDE)
17 DDC/CEC_GND
Close to SIDE_USB
OPT
C220
10uF
10V
3AU04S-305-ZC-(LG)
JK202
C221
22uF
10V
R245
4.7K
18 +5V_POWER
+5V_USB
L220
16 SDA
120
15 SCL
14 NC
1
13 CEC
12 CLK-
R246
10K
R243 R244
2.7K 2.7K
READY
ZD241
READY
ZD242
R247
100
R248
100
HDMI2_SDA
HDMI2_SCL
READY
ZD243
USB DOWN STREAM
HDMI2_CK-
2
11 CLK_SHIELD
USB_DN
9
READY
ZD221
30V
8
7
DATA0-
DATA0+
6
5
4
HDMI2_CK+
HDMI2_D0-
DATA0_SHIELD
DATA1-
5
4
3
10
USB_DP
READY
ZD220
30V
CLK+
HDMI2_D0+
HDMI2_D1-
DATA1_SHIELD
DATA1+
3 DATA2DATA2_SHIELD
2
DATA2+
1
HDMI2_D1+
HDMI2_D2HDMI2_D2+
JK204
THE
SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE
SYMBOL MARK OF THE SCHEMETIC.
32LN5100
INPUT2
2012/11/15
2
7
INPUT2
Copyright © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only
EAX65027101
LB35B/LC35B/LL35B
SW_RESET
100
SDATA
7
R302
100
WCK
8
PVDD1B
PVDD1A
OUT1A
SPK_L+
L303
10uH
C330
0.1uF
50V
OUT1B
29
PGND1B
28
BST1B
27
VDR1
26
VCC5
25
AGND
24
VDR2
23
BST2A
22
PGND2A
R315
12
4.7K
C329
0.47uF
50V
C326
390pF
50V
30
R322
SPEAKER_L
C331
0.1uF
50V
L304
10uH
R316
12
R323
4.7K
SPK_L-
C315
22000pF
50V
JP304
SPK_L+
SPK_L+
C312
1uF
10V
C313
1uF
10V
3
JP302
SPK_R+
SPK_R+
C311
22000pF
50V
OUT2A
SPK_L-
SPK_L-
C314
1uF
10V
4
JP303
2
JP301
SPK_R-
SPK_R-
1
.
20
19
18
R314
12
C325
390pF
50V
31
32
33
34
PGND1A
RESET
BST1A
35
AD
C317
10uF
35V
R313
12
21
SMAW250-H04R
PVDD2A
+3.3V_M
OUT2B
C306
33pF
50V
PVDD2B
P301
C305
33pF
50V
PGND2B
R309
4.7K
36
10
17
SDA
9
16
BCK
0x54
BST2B
R308
4.7K
CLK_I
NTP7513
SCL
AUAMP_SCL
37
6
100
100
38
DVDD
MONITOR_2
100
IC301
MONITOR_1
R307
5
MONITOR_0
100
4
DGND
FAULT
R306
3
GND
THERMAL
41
11
AUAMP_SDA
DGND_PLL
R301
R303
I2S_SCK
2
15
I2S_WS
VDD_PLL
14
I2S_SDO
1
13
C303
1uF
10V
AGND_PLL
12
C302
0.1uF
16V
GND_IO
C318
0.1uF
50V
VDD_IO
C322
0.1uF
16V
39
C321
10uF
6.3V
40
C301
0.1uF
16V
OPT
+24V_AMP
L301
BLM18PG121SN1D
[EP]GND
+3.3V_M
C319
I2S_MCLK R304
22000pF
50V
C320
1000pF
50V
SPK_R+
+24V_AMP
R317
12
R318
12
L305
10uH
C327
390pF
50V
C309
0.1uF
50V
C308
22000pF
C310
10uF
35V
C328
390pF
50V
R319
12
C334
0.1uF
50V
R324
4.7K
C335
0.1uF
50V
R325
4.7K
C333
0.47uF
50V
SPEAKER_R
L306
10uH
R320
12
50V
SPK_R-
R311
POWER_DET
100
AUDIO_OUT AMP : GAIN X 4
IC302
AS324MTR-E1
P_12V
C350
0.1uF
16V
C
B
Q350
MMBT3904(NXP)
R351
1 OUT1
1K
OUT4 14
E
MNT_LOUT
R350
4.7K
C351
6800pF
50V
R352
C352
10K
33pF 50V
2 INPUT1-
INPUT4- 13
3 INPUT1+
INPUT4+ 12
R353
6.8K
R354
MNT_L_AMP
5.6K
P_12V
4 VCC
GND 11
C353
0.1uF
16V
R355
MNT_R_AMP
C354
5.6K
5 INPUT2+
INPUT3+ 10
6 INPUT2-
INPUT3- 9
33pF 50V
P_12V
R356
10K
R357
6.8K
C355
0.1uF
16V
C
B
Q351
MMBT3904(NXP)
R358
7 OUT2
1K
OUT3 8
E
MNT_ROUT
R359
4.7K
THE
SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE
SYMBOL MARK OF THE SCHEMETIC.
C356
6800pF
50V
32LN5100
AUDIO
2012/11/15
3
7
AUDIO
Copyright © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only
EAX65027101
LB35B/LC35B/LL35B
IR
+3.5V_ST
R422
10K
R421
10K
KEY1
ZD401
SD05
OPT
C421
0.1uF
P421
12507WR-08L
KEY2
ZD402
SD05
OPT
C422
0.1uF
1
2
+3.5V_ST
3
L421
BLM18PG121SN1D
4
IF
C424
1000pF
50V
C423
0.1uF
16V
R423
4.7K
OPT
5
LED
OPT
C425
0.1uF
16V
7
IR
C426
100pF
50V
NTSC
TU402
TDSS-H501F(B)
PAL
TU401
TDSH-G501D(B)
6
8
9
+3.3V_TU
R404
100K
R403
100
1
2
NC
1
RESET
2
TUNER_RESET
C401
0.1uF
16V
NC_1
+3.3V_TU
RESET
R407
2.2K
R408
2.2K
R405
3
4
5
6
7
8
9
10
11
B1
B1
A1
SCL
3
SDA
4
+B1[3.3V]
5
SIF
6
+B2[1.8V]
7
CVBS
8
IF_AGC
9
DIF[P]
10
DIF[N]
A1
11
X
B1
A1
SCL
C402
47pF
50V
SDA
R406
C403
47pF
50V
+B1[3.3V]
A2
A2
B2
12
Near the pin
+3.3V_M
Size change,0929
L401
BLM18PG121SN1D
1/10W
NC_2
C406
100pF
50V
C405
0.1uF
16V
R410
1
C404
22uF
6.3V
C411
0.1uF
16V
1/10W
C412
10uF
6.3V
+B2[1.8]
IC401
AP1117E18G-13
NC_3
1
R411
1
IN
ADJ/GND
3
OUT
2
IF_AGC
DIF[P]
C409
100pF
50V
C407
10uF
6.3V
C408
0.1uF
16V
DIF[N]
R412
100
A1
NTSC
R413-*1
0
R414
10 PAL
SHIELD
+3.3V_TU
TUNER_SDA
33
R409
1
R413
10 PAL
B2
TUNER_SCL
33
C410
0.1uF
16V
IF_AGC
should be guarded by ground
IF_P
IF_N
Close to the tuner
NTSC
R414-*1
0
READY
C430
0.1uF
250V
READY
C431
0.1uF
250V
R401
0
NTSC
THE
SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE
SYMBOL MARK OF THE SCHEMETIC.
32LN5100
TUNER & IR
2012/11/15
4
8
TUNER & IR
Copyright © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only
+3.5V_ST
AUAMP_SCL
PWM_DIM
MSTAR Vcc
+3.3V_M
R535 1K
R536
22
+1.2V_VDDC
1K
VDDC
120-ohm
C501
10uF
6.3V
HW_OPT1
HD
R551
4.7K
TESTPIN
DDCA_CK
DDCA_DA
R537
22
ST 1.26V
L500
R550
4.7K
R534
PWM1/GPIO25
PWM0/GPIO26
R540
1K
GPIO67
R541
100
SAR3/GPIO72
SAR2/GPIO73
SAR1/GPIO74
SAR0/GPIO75
AVDD_DDR_2
GPIO68
GPIO69/I2S_OUT_MCK
GPIO70
IRIN
CEC
HWRESET
GND
HOTPLUG_D
RXCKN_D
RXCKP_D
RX0N_D
RX0P_D
DDCDD_DA
RX1N_D
RX1P_D
R542
100
[EP]
FHD
HIGH
FHD
C549
0.1uF
R545
100
R546
100
R538
4.7K
R543
100
HD
LOW
HW_OPT
DSUB_SCL
R544
100
R518
100
LED R539
4.7K
R519
4.7K
DSUB_SDA
KEY1
KEY2
*H/W OPTION
AVDD_DDR
SW_RESET
AUAMP_SDA
I2S_MCLK
IR
MUTE_AOUT
+3.5V_ST
HW_RESET
HDMI2_HPD
HDMI2_CK+
HDMI2_CK-
HDMI2_D0-
HDMI2_SDA
HDMI2_D0+
LB35B/LC35B/LL35B
HDMI2_D1-
HDMI2_D1+
EAX65027101
DDR 1.8V
R533
L501
0
+1.8V_M
AVDD_DDR
120-ohm
C502
10uF
6.3V
C503
4.7uF
14
85
GPIO6
HSYNC1
19
84
GPIO7
BIN1P
20
83
INT/GPIO65
LVB0M
80
LVB0P
25
78
LVB1P
CVBS1
26
77
AVDD_MOD_3
CVBS0
27
76
LVB2M
VCOM
75
28
CVBSOUT1
AVDD_AU33
R547
10K
R548
POWER_SW
LVB2P
72
32
71
LVB3P
33
70
LVB4M
34
69
LVB4P
35
68
LVA0M
67
LVA0P
37
66
LVA1M
62
63
64
LVA2P
LVA2M
58
LVA3P
61
57
LVA4M
LVACLKM
56
LVA4P
AVDD_MOD_2
55
VDDC_1
60
54
VDDP
59
53
GPIO61
LVA3M
52
GPIO60
LVACLKP
50
51
6
4
5
R569 R577
4.7K 4.7K
SCL
EEP_SCL
R578
22
SDA
C573
22pF
READY
C574
22pF
READY
EEP_SDA
R579
22
VDDC
C547
0.1uF
RXB0RXB0+
SERIAL FLASH(2MB)
RXB0RXB0+
RXB1-
RXB1-
RXB1+
RXB1+
+3.5V_ST
C546
0.1uF
RXB2RXB2+
RXBCK-
RXB3+
RXB2-
IC502
W25Q64FVSSIG
RXB2+
SPI_CZ
RXBCKRXBCK+
SPI_DO
R571
100
CS
R572
DO[IO1]
1
8
2
7
3
6
VCC
C570
0.1uF
16V
%HOLD[IO3]
100
RXB3-
WP[IO2]
R573
FLASH_WP
CLK
R574
100
100
RXB3+
GND
4
5
DI[IO0]
SPI_CLK
R575
SPI_DI
100
36
GPIO58/I2S_OUT_SD
3
C572
0.1uF
16V
WP
EEP_SCL
RXB3-
31
VAG
49
7
100
RXBCK+
LVB3M
48
8
2
VDDC_3.3
AUREF
47
1
+3.5V_ST
VCC
R549
LVBCKP
39
A2
GND
LVBCKM
MNT_R_AMP
A1
R527
10K
73
65
A0
10K
R528
100
74
38
IC503
AT24C64D-SSHM-T
HDMI2_DET
30
R508
100
EEPROM(64K)
HDMI1_DET
29
46
2.2uF
LVB1M
VSYNC1
LINEIN_L1
LINEIN_R1
LINEIN_L3
LINEIN_R3
LINEOUTL3
LINEOUTR3
2.2uF
79
24
45
C517
0.1uF
81
44
C515
0.1uF
22
43
0.047uF
GIN1P
42
C514
VDDC_2
RIN1P
FLASH_WP
100
POWER_DET
82
23
R530
EEP_SDA
21
41
0.047uF
3.3V_DMPLL
HW_OPT1
SOGIN1
40
68
L506
MNT_L_AMP
103
18
AU_3.3V
R510
220K
104
AVDD3P3_ADC
MNT_VOUT
C522
220pF
105
GPIO5
GIN1M
L505
120-ohm
PANEL_ON
GPIO4
R507
C521
GPIO3
86
C511
AU_3.3V
SPI_CLK
87
R503
AVDD33_DEMOD
L504
120-ohm
SPI_DI
17
C508
0.047uF
L503
120-ohm
SPI_DO
16
C512
0.047uF
AV2_RIN
88
15
C548
0.1uF
SPI_CZ
VDD
C550
0.047uF
C520
LGE6841 (ATV_13)
VDDC_3.3
C504
10uF
6.3V
VDDC_3.3
10K
RX2P_A
120-ohm
+3.5V_ST
USB_DN
ARC
COMP_PR
AV2_LIN
106
GPIO2
13
R523
33
2.2uF
107
89
RX2N_A
C509
1000pF
2.2uF
108
GPIO1
12
C506
0.1uF
C518
109
90
DDCDA_DA
VDDC
C519
110
91
GPIO0
IC501
11
DDCDA_CK
COMMON_RIN
111
92
PWM3/GPIO25
PWM2/GPIO24
HDMI1_SCL
COMMON_LIN
112
SPI_CK
93
HDMI1_D2+
C516
10uF
113
94
10
HDMI1_D2-
120-ohm
114
9
HDMI1_SDA
68
115
95
RX1P_A
C513
0.047uF
116
8
SPI_DI
HDMI1_D1+
R506
33
117
SPI_DO
HDMI1_D1-
AV2_VIN
118
96
RX1N_A
R505
33
119
7
AVDD_MOD_1
R504
33
120
SPI_CZ
ST 3.3V
L502
RL_ON
USB_DP
97
VDDC_3.3
C510
0.047uF
99
USB0_DP
98
HDMI1_D0+
R502
33
AVDD_MOD_4
6
RX0P_A
COMMON_VIN
100
5
RX0N_A
COMP_PB
GPIO63
RXCKP_A
HDMI1_D0-
R501
33
101
USB0_DM
HDMI1_CK-
C507
0.1uF
GPIO64
RXCKN_A
HDMI1_CK+
VDDC_3.3
121
4
HDMI1_HPD
C505
0.1uF
THERMAL
129
102
R570
HOTPLUG_A
122
3
HDMI2_D2+
123
RX2P_D
HDMI2_D2-
124
2
125
RX2N_D
126
1
127
DDCDD_CK
HDMI2_SCL
128
INV_ON
R531
10K
LVA1P
RXA0-
RXA0-
RXA0+
RXA0+
RXA1-
RXA1-
RXA1+
RXA1+
C571
0.1uF
16V
READY
H/W RESET
+3.5V_ST
C536
33pF
50V
Close to MSTAR
Close to MSTAR
2
RESET
POWER_DET
RXA2-
RXA2+
GND
C560
0.1uF
RXA2+
R562
470
RXA2-
RXACK-
1
RXACK-
RXACK+
RXA3-
RXA3-
RXA3+
RXA3+
3
C561
4.7uF
10V
C541
22000pF
50V
C537
33pF
L521
100NH
OPT
RXACK+
+3.3V_M
TUNER_SDA
C535
0.1uF
OPT
C551
220pF
50V
R524
0
TUNER_SCL
C534
0.1uF
C531
15pF
AVDD_DDR
R517
10K
24MHz
I2S_SCK
R514
100
TUNER_RESET
R513
100
R521
100
R561
10K
IC504
APX803D29
VCC
R520
100
I2S_SDO
GPIO56
GPIO55/I2S_OUT_WS
VSS
AVDD_DDR
IFAGC
C542
0.1uF
X501
C530
15pF
VIFM
VIFP
AVDD3P3_DADC
C533
0.1uF
AVDD33_DEMOD
I2S_WS
3.3V_DMPLL
GPIO57/I2S_OUT_BCK
C532
0.1uF
R512
1M
AVDD3P3_DMPLL
R511
220K
XTALO
C523
220pF
XTALI
R509
100
IF_AGC
R564
10
C544
0.1uF
C543
0.1uF
C545
0.1uF
C562
4.7uF
10V
R563
62K
HW_RESET
C563
0.1uF
16V
VDDC
IF_N
THE
SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE
SYMBOL MARK OF THE SCHEMETIC.
IF_P
VDDC_3.3
VDDC_3.3
32LN5100
MAIN SOC
2012/11/15
5
7
MAIN SOC
Copyright © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only
EAX65027101
LB35B/LC35B/LL35B
FHD
P602
FI-RE51S-HF-J-R1500
1
2
3
4
5
6
7
8
9
10
11
12
RXA3+
13
RXA3-
14
15
RXACK+
RXACK-
16
RXA2+
17
HD
P601
FF10001-30
RXA2-
18
1
19
RXA1+
2
20
RXA13
21
4
22
RXA0+
5
23
RXA06
24
7
25
8
26
9
27
10
28
29
RXB3+
RXB3-
11
12
30
31
RXBCK+
RXBCK-
13
14
32
33
RXB2+
RXB2-
15
16
34
17
35
36
RXB1+
RXB1-
18
19
37
20
38
RXB0+
39
RXB0-
21
22
40
23
41
24
42
25
43
26
44
27
45
28
46
29
47
PANEL_VCC
48
30
FHD
L602
120
50
[29]
[28]
[27]
[26]
[25]
RXA0RXA0+
[24]
[23]
[22]
RXA1RXA1+
[21]
[20]
[19]
RXA2RXA2+
[18]
[17]
[16]
RXACK-
[15]
RXACK+
[14]
[13]
RXA3RXA3+
[12]
[11]
[10]
[09]
[08]
[07]
[06]
[05]
PANEL_VCC
[04]
[03]
HD
L601
120
[02]
[01]
HD
C603
0.1uF
16V
31
49
[30]
OPT
C602
1000pF
50V
OPT
C601
10uF
16V
.
51
52
THE
SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE
SYMBOL MARK OF THE SCHEMETIC.
FHD
C606
0.1uF
16V
OPT
C605
1000pF
50V
OPT
C604
10uF
16V
32LN5100
LVDS
2012/11/15
6
7
LVDS
Copyright © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only
EAX65027101
LB35B/LC35B/LL35B
** 3.5V_ST -> 1.26V VDDC
+3.5V_ST
V0 = 0.8*(1+(R2/R1))
FROM LIPS & POWER B/D
IN_2
8
C
P701
SMAW200-H18S1
B
E
C740
10uF
6.3V
NC
RL_ON
PWR_ON
C702
0.1uF
16V
ZD702
SD05
120
DRV_ON
3
4
P-DIM
5
6
P-DIM2
7
8
L702
24V
9
10
24V
120
GND
11
12
GND
12V
13
14
12V
L703
12V
15
16
NC
120
GND
17
18
GND
P_12V
R710
100
3
5
4
R742
1
FB
R1
EN
C742
10uF
6.3V
C
1K
R740
2.7K
R2
1%
GND
R741
4.7K
R715
10K
R729
B
PWM_DIM
R716
10K
Q703
GND
C707
0.1uF
50V
C705
0.1uF
16V
3.5V
2
1
GND
+24V_AMP
ZD701
20V
READY
3.5V
6
C741
0.1uF
16V
+3.5V_ST
R714
1K
L701
OUT_2
2
1%
R744
10K
+3.3V_M
+3.5V_ST
9
7
THERMAL
IN_1
OUT_1
1
+3.5V_ST
MMBT3906(NXP)
Q722
+1.2V_VDDC
OUT:1.26V
IC701
MP20051
[EP]GND
E
MMBT3904(NXP)
INV_ON
** 3.3V_M -> 1.8V_M
IC711
AP1117E18G-13
+3.3V_M
IN
3
ADJ/GND
1
C744
0.1uF
16V
C743
10uF
6.3V
+1.8V_M
2
OUT
C745
10uF
6.3V
.
19
** +3.5V_ST -> 3.3V_M
+3.5V_ST
Q710
AO3435
C750
0.1uF
16V
READY
R748
33K
**12V->USB 5V
R749
2.2K
C
NR8040T4R7N
L771
C774
0.1uF
SS
L770
120
Closed IC709
C770
10uF
16V
IN
C772
0.1uF
16V
SW
GND
2
3
FB
8
1
VCC
7
3A
4
E
OUT:5V
R1
R770
43K
C776
22uF
10V
OPT
+5V_USB
C777
10uF
10V
1%
R771
33
R2
R778
47K
R772
8.2K
1%
EN
6
C775
0.1uF
16V
** Switch Panel-Vcc
BST
5
P_12V
R777
100K
+3.3V_M
JP711
JP710
R765
3.3K
OPT
R766
4.7K
C
PANEL_ON
JP709
C761
0.1uF
16V
R762
5.6K
** Jig Point_GND
JP708
C760
4.7uF
16V
G
R761
33K
THE
SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE
SYMBOL MARK OF THE SCHEMETIC.
PANEL_VCC
Q720
AO3407A
L761
120
S
C773
0.1uF
16V
D
P_12V
6.8uH
Closed IC709
Q711
MMBT3904(NXP)
B
POWER_SW
V0 = 0.8*(1+(R1/R2))
IC709
MP1497DJ
+3.3V_M
C754
10uF
6.3V
C752
0.1uF
16V
G
R750
10K
R747
10K
C771
1uF
25V
C753
4.7uF
10V
D
S
L750
BLM18PG121SN1D
B
Q721
E MMBT3904(NXP)
32LN5100
POWER
2012/11/15
7
7
POWER
Copyright © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only
Standard Repair Process
Error
symptom
LCD TV
A. Video error
Established
date
No video/ Normal audio
Revised date
2013. 01 .24
1/14
First of all, Check whether all of cables between board is inserted properly or not.
(Main B/D↔ Power B/D, LVDS Cable,Speaker Cable,IR B/D Cable,,,)
☞A1
No video
Normal audio
Normal
audio
Y
Check Back Light
On with naked eye
N
Move to No
video/No audio
☞A4
Y
On
Check Power Board
24v, 12v,3.5v etc.
N
☞A2
Y
Replace T-con Board
or module
N
Check Power Board 93.2~118.5V v output
Normal
voltage
Normal
voltage
Y
Repair Power Board
or parts
Replace Inverter
or module
End
N
Repair Power
Board or parts
※Precaution
☞A6 & A3
Always check & record S/W Version and White
Balance value before replacing the Main Board
Copyright © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
Replace Main Board
1 / 36
Re-enter White Balance value
LGE Internal Use Only
Standard Repair Process
LCD TV
Error
symptom
A. Video error
Established
date
No video/ No audio
Revised date
2013. 01 .24
2/14
☞A4
No Video/
No audio
Check various voltages
of Power Board
( 3.5V,12V,20V or 24V…)
Y
Normal
voltage?
N
Check and
replace
MAIN B/D
End
Replace Power
Board and repair
parts
Copyright © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
2 / 36
LGE Internal Use Only
Standard Repair Process
Error
symptom
LCD TV
A. Video error
Established
date
Picture broken/ Freezing
Revised date
2013. 01 .24
3/14
☞ A5
Check RF Signal level
Normal
Signal?
Y
Check whether other equipments have problem or not.
(By connecting RF Cable at other equipment)
→ DVD Player ,Set-Top-Box, Different maker TV etc`
N
☞ A6
Check RF Cable
Connection
1. Reconnection
2. Install Booster
Normal
Picture?
Y
Check
S/W Version
Normal
Picture?
N
Y
N
N
SVC
Bulletin?
Check
Tuner soldering
Normal
Picture?
Y
Close
N
S/W Upgrade
Contact with signal distributor
or broadcaster (Cable or Air)
Replace
Main B/D
Normal
Picture?
Y
N
Y
Close
Close
Copyright © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
3 / 36
LGE Internal Use Only
Standard Repair Process
LCD TV
Error
symptom
A. Video error
Established
date
Tuning fail, Picture broken/ Freezing
Revised date
☞ A5
Check RF Signal level
2013. 01 .24
4/14
Check RF signal cable
Check whether other equipments have problem or not.
(By connecting RF Cable at other equipment)
→ Set-Top-Box, Different maker TV etc
☞ A6
Normal
Signal?
Y
Check
S/W Version
N
SVC
Bulletin?
N
Check
Tuner soldering
Replace
Main B/D
Y
S/W Upgrade
Contact with
signal distributor
or broadcaster
Normal
Picture?
N
Y
Close
Close
Copyright © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
4 / 36
LGE Internal Use Only
Standard Repair Process
LCD TV
Error
symptom
☞A7
A. Video error
Established
date
Color error
Revised date
2013. 01. 24
5/14
☞ A8/ A9
Check color by input
-AV
-COMPONENT
-HDMI
Color
error?
Y
N
※ Check and
replace Link
Cable
(LVDS) and
contact
condition
Y
Color
error?
Y
Color
error?
Replace Main B/D
N
N
Check error color
input mode
☞A10
Check Test pattern
Replace module
End
AV/
Component
error
Check
external
device and
cable
External device Y
/Cable
normal
Replace Main B/D
N
Request repair
for external
device/cable
N
HDMI
error
Copyright © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
Check external
device and
cable
5 / 36
External device Y
/Cable
normal
Replace Main B/D
LGE Internal Use Only
Standard Repair Process
LCD TV
Established
date
A. Video error
Error
symptom
Vertical / Horizontal bar, residual image,
light spot, external device color error
2013. 01 .24
Revised date
6/14
Vertical/Horizontal bar, residual image, light spot
Replace
Module
☞A7
Check color condition by input
-AV
-Component
-HDMI
Screen Y
normal?
☞ A8/ A9
Check external
device
connection
condition
Y
Normal?
Screen
normal?
N
N
Check Test pattern
N
Replace Main B/D
Screen
normal?
Y
Y
Request repair
for external
device
Replace
module
☞A10
Check and
replace Link
Cable
N
End
End
External device screen error-Color error
Check S/W Version
Check
version
N
Y
AV
Input
error
Component
error
S/W Upgrade
Normal
screen?
Check screen
condition by input
-AV
-Component
-HDMI
N
HDMI
Y
Copyright © 2013 LG Electronics. Inc. All
rights reserved.
End
Only for training and service purposes
6 / 36
Connect other external
device and cable
(Check normal operation of
External Input, Component,
and HDMI by connecting Jig,
pattern Generator ,Set-top
Box etc.
Connect other external
device and cable
(Check normal operation of
External Input, Component,
and HDMI by connecting Jig,
pattern Generator ,Set-top Box
etc.
Screen
normal?
N
Replace
Main B/D
Y
Request repair for
external device
Y
Screen
normal?
N
Replace
Main B/D
LGE Internal Use Only
Standard Repair Process
LCD TV
Error
symptom
B. Power error
Established
date
No power
Revised date
☞A11
Check
Power LED
. Stand-By: Red
2013. 01 .24
7/14
☞A13
DC Power on
by pressing Power Key
On Remote control
Y
Power LED
On?
N
Normal N
operation?
Check Power
On ‘”High”
OK?
Y
Replace
Power
B/D
Y
Check Power cord
was inserted properly
Replace Main B/D
☞A4
N
Measure voltage of each output of Power B/D
Normal?
Y
Y
※
Close
Check ST-BY 3.5V
Normal
Y
voltage?
☞A12
Normal
voltage?
Y
Replace Main B/D
N
Replace Power B/D
N
Replace Power
B/D
Copyright © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
7 / 36
LGE Internal Use Only
Standard Repair Process
LCD TV
Established
date
B. Power error
Error
symptom
Off when on, off while viewing, power auto on/off
2013. 01 .24
Revised date
8/14
Check outlet
☞A14
Check A/C cord
Check for all 3- phase
power out
Error?
N
Check Power Off
Mode
CPU
Abnormal
Replace Main B/D
Normal?
Y
End
N
Y
☞A13
Fix A/C cord & Outlet
and check each 3
phase out
(If Power Off mode is
not displayed)
Check Power B/D
voltage
※ Caution
Check and fix exterior
of Power B/D Part
* Please refer to the all cases which
can be displayed on power off mode.
Copyright © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
Replace Power B/D
Abnormal
1
Normal
voltage?
Y
Replace Main B/D
N
Replace Power B/D
Status
Power off List
"POWEROFF_REMOTEKEY"
"POWEROFF_OFFTIMER"
"POWEROFF_SLEEPTIMER"
"POWEROFF_INSTOP"
Normal "POWEROFF_AUTOOFF"
"POWEROFF_ONTIMER"
"POWEROFF_RS232C"
"POWEROFF_SWDOWN"
"POWEROFF_UNKNOWN"
"POWEROFF_ABNORMAL1"
Abnormal
"POWEROFF_CPUABNORMAL"
8 / 36
Power
Power
Power
Power
Power
Power
Power
Power
Power
Power
Power
off
off
off
off
off
off
off
off
off
off
off
Explanation
by REMOTE CONTROL
by OFF TIMER
by SLEEP TIMER
by INSTOP KEY
by AUTO OFF
by ON TIMER
by RS232C
by S/W Download
by unknown status except listed case
by abnormal status except CPU trouble
by CPU Abnormal
LGE Internal Use Only
Standard Repair Process
LCD TV
Error
symptom
C. Audio error
Established
date
No audio/ Normal video
Revised date
☞A15
No audio
Screen normal
Check user
menu >
Speaker off
2013. 01 .24
9/14
☞A16
N
Off
Check audio B+ 24V
of Power Board
Normal
voltage
Y
N
Cancel OFF
Check Speaker
disconnection
Y
Replace Power Board and repair parts
Disconnection
N
Replace MAIN Board
End
Y
Replace Speaker
Copyright © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
9 / 36
LGE Internal Use Only
Standard Repair Process
LCD TV
C. Audio error
Error
symptom
Wrecked audio/ discontinuation/noise
Established
date
2013. 01 .24
Revised date
10/14
→ abnormal audio/discontinuation/noise is same after “Check input signal” compared to No audio
☞A16
Check input
signal
-RF
-External Input
signal
Wrecked audio/
Discontinuation/
Noise for
all audio
Signal
normal?
Check and replace
speaker and
connector
Check audio
B+ Voltage (24V)
Y
N
Y
Wrecked audio/
Discontinuation/
Noise only
for RF
Normal
voltage?
Replace Main B/D
N
Replace Power B/D
(When RF signal is not
received)
Request repair to external
cable/ANT provider
(In case of External
Input signal error)
Check and fix
external device
Replace Main B/D
Wrecked audio/
Discontinuation/
Noise only
for External Input
Connect and check
other external device
Normal
audio?
End
N
Y
Check and fix external device
Copyright © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
10 / 36
LGE Internal Use Only
Standard Repair Process
Error
symptom
LCD TV
D. Function error
Established
date
Remote control & Local switch checking
Revised date
2013. 02. 02
11/14
1. Remote control(R/C) operating error
☞A17
Check R/C itself
Operation
☞A17
Check & Repair
Cable connection
Connector solder
Normal
Y
operating?
N
Normal
operating?
N
Y
Check R/C Operating
When turn off light
in room
Check & Replace
Baterry of R/C
If R/C operate,
Explain the customer
cause is interference
from light in room.
Normal
operating?
Replace
Main B/D
☞A17
Check B+ 3.5V
On Main B/D
☞A4
Close
Normal
Voltage?
Y
Check IR
Output signal
N
Check 3.5v on Power B/D
Replace Power B/D or
Replace Main B/D
(Power B/D don’t have problem)
Normal
Signal?
Y
N
Repair/Replace
IR B/D
Close
N
Replace R/C
Copyright © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
11 / 36
LGE Internal Use Only
Standard Repair Process
LCD TV
Check
input
signal
Signal
input?
Established
date
D. Function error
Error
symptom
External device recognition error
Y
N
Check and fix
external device/cable
Copyright © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
Check technical
information
- Fix information
- S/W Version
Technical
information?
2013. 02. 02
Revised date
N
External Input and
Component
Recognition error
12/14
Replace Main B/D
Y
Fix in
accordance
with technical
information
12 / 36
RGB,HDMI/
DVI, Optical
Recognition error
Replace Main B/D
LGE Internal Use Only
Standard Repair Process
LCD TV
Identify
nose type
Error
symptom
Circuit
noise
Mechanical
noise
E. Noise
Established
date
Circuit noise, mechanical noise
Revised date
Check location
of noise
13/14
Replace PSU(with LED driver)
OR
Replace LED driver
Check location of
noise
※ Mechanical noise is a natural
phenomenon, and apply the 1st level
description. When the customer does not
agree, apply the process by stage.
※ Describe the basis of the description in
“Part related to nose” in the Owner’s Manual.
Copyright © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
2013. 02. 02
OR
OR
13 / 36
※ When the nose is severe, replace the module
(For models with fix information, upgrade the S/W or
provide the description)
※ If there is a “Tak Tak” noise from the cabinet,
refer to the KMS fix information and then proceed
as shown in the solution manual
(For models without any fix information, provide
the description)
LGE Internal Use Only
Standard Repair Process
LCD TV
F. Exterior defect
Error
symptom
Zoom part with
exterior damage
Exterior defect
Module
damage
Replace module
Cabinet
damage
Replace cabinet
Remote
controller
damage
Stand
dent
Copyright © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
Established
date
Revised date
2013. 02. 02
14/14
Replace remote controller
Replace stand
14 / 36
LGE Internal Use Only
Contents of LCD TV Standard Repair Process Detail Technical Manual
No.
Error symptom
1
Content
Page
Check LCD back light with naked eye
A1
LED driver B+ measuring method
A2
Check White Balance value
A3
Power Board voltage measuring method
A4
TUNER input signal strength checking method
A5
LCD-TV Version checking method
A6
LCD TV connection diagram
A7
Check Link Cable (LVDS) reconnection
condition
A8
A9
12
Adjustment Test pattern - ADJ Key
A10
13
LCD TV connection diagram
A8
Check Link Cable (LVDS) reconnection
condition
A8
A9
15
Adjustment Test pattern - ADJ Key
A10
16
Exchange T-Con Board (1)
A-1/5
17
Exchange T-Con Board (2)
A-2/5
Exchange LED driver Board (PSU)
A-3/5
19
Exchange Module itself (1)
A-4/5
20
Exchange Module itself (2)
A-5/5
2
3
A. Video error_ No video/Normal audio
4
6
7
A. Video error_ No video/Video lag/stop
9
10
11
14
18
A. Video error_Color error
A. Video error_Vertical/Horizontal bar,
residual image, light spot
<Appendix>
Defected Type caused by T-Con/
Inverter/ Module
Copyright © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
15 / 36
Remarks
Continue to the next
page
LGE Internal
Use Only
Contents of LCD TV Standard Repair Process Detail Technical Manual
Continued from previous page
No.
Error symptom
Content
Page
21
Check front display LED
A11
22
Check power input Voltage & ST-BY 3.5V
A12
Checking method when power is ON
A13
POWER BOARD voltage measuring method
A4
POWER OFF MODE checking method
A14
Checking method in menu when there is no
audio
A15
Voltage and speaker checking method when
there is no audio
A16
23
B. Power error_No power
24
Remarks
25
26
B. Power error_Off when on, off while
viewing
28
C. Audio error_No audio/Normal video
29
30
C. Audio error_Wrecked
audio/discontinuation
Voltage and speaker checking method in
case of audio error
A16
31
D. Function error_ No response in
remote controller, key error
Remote controller operation checking method
A17
Copyright © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
16 / 36
LGE Internal Use Only
Standard Repair Process Detail Technical Manual
LCD TV
Error
symptom
A. Video error_No video/Normal audio
Content
Check Back Light On with naked eye
Established
date
Revised
date
2013. 02.15
A1
<ALL MODELS>
Power On -> disjoint back case -> check lighting from the module
Copyright © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
17 / 36
LGE Internal Use Only
Standard Repair Process Detail Technical Manual
LCD TV
Error
symptom
A. Video error_No video/Normal audio
Content
Inverter B+ 24V measuring method
Established
date
Revised
date
2013. 02 .15
A2
<ALL MODELS>
Measure DC Voltage applying to Module from Power Board.
*Output Voltage is depend on inch
32 inch : 65.6~86.9V
39 inch : 117.3~142.2V
42 inch : 141.8~164.3V
*Output Voltage from Power Board -> supply to Module.
Check Pin contacting statement and connection statement.
Copyright © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
18 / 36
LGE Internal Use Only
Standard Repair Process Detail Technical Manual
LCD TV
Error
symptom
A. Video error_No video/Normal audio
Content
Check White Balance value
Established
date
Revised
date
2013. 02.15
A3
<ALL MODELS>
Entry method
1. Press the ADJ button on the remote controller for adjustment.
2. Enter into W/B ADJUST
3. After recording the R, G, B (GAIN, Offset) value of Color Temp (Cool/Medium/Warm),
re-enter the value after replacing the MAIN BOARD.
4. Confirm W/B ADJUST “OK” at In-start menu.
Copyright © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
19 / 36
LGE Internal Use Only
Standard Repair Process Detail Technical Manual
LCD TV
Error
symptom
A. Video error_No video/ Audio
Content
Power Board voltage measuring method
Established
date
Revised
date
2013. 02.15
A4
Edge LED
Check the DC 24V, 12V, 3.5V.
18 Pin (Power Board ↔ Main Board) – Common
Copyright © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
1
Power on
2
DRV ON
3
3.5V
4
PDIM
5
3.5V
6
N/C
7
GND
8
GND
9
24V
10
24V
11
GND
12
GND
13
12V
14
12V
15
12V
16
N.C
17
GND
18
GND
20 / 36
LGE Internal Use Only
Standard Repair Process Detail Technical Manual
LCD TV
Error
symptom
A. Video error_Video error, video lag/stop
LCD-TV Version checking method
Content
<ALL MODELS>
Established
date
Revised
date
2013. 02.15
A6
1. Checking method for remote controller for adjustment
Version
Press the IN-START with the remote
controller for adjustment
Copyright © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
21 / 36
LGE Internal Use Only
Standard Repair Process Detail Technical Manual
LCD TV
Error
symptom
Content
A. Video error _Vertical/Horizontal bar, residual
image, light spot
LCD TV connection diagram (1)
Established
date
Revised
date
2013. 02.15
A7
<ALL MODELS>
As the part connecting to the external input, check the
screen condition by signal
Copyright © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
22 / 36
LGE Internal Use Only
Standard Repair Process Detail Technical Manual
LCD TV
Error
symptom
Content
A. Video error_Color error
Check and replace Link Cable(LVDS) and contact condition
Established
date
Revised
date
2013. 02.15
A8/A9
<ALL MODELS>
1. Check and replace LVDS Cable
2. Check LVDS connection condition
Copyright © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
23 / 36
LGE Internal Use Only
Standard Repair Process Detail Technical Manual
LCD TV
Error
symptom
A. Video error_Color error
Content
Adjustment Test pattern - ADJ Key
Established
date
Revised
date
2013. 02.15
A10
You can view 6 types of patterns(with White and Full White) using the ADJ Key
Checking item : 1. Defective pixel 2. Residual image 3. MODULE error (ADD-BAR,SCAN BAR..)
4.Video error (Classification of MODULE or Main-B/D!)
Copyright © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
24 / 36
LGE Internal Use Only
Appendix : Exchange T-Con Board (1)
Solder defect, CNT Broken
Solder defect, CNT Broken
Solder defect, CNT Broken
Solder defect, CNT Broken
T-Con
T-Con
Defect,
Defect,
CNT
CNT
Broken
Broken
Solder
defect,
CNT
Broken
T-Con
Defect,
CNT
Broken
Abnormal Power Section
Solder defect, Short/Crack
Copyright © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
Abnormal Power Section
25 / 36
Solder defect, Short/Crack
LGE Internal Use Only
Appendix : Exchange T-Con Board (2)
Abnormal Power Section
Solder defect, Short/Crack
GRADATION
Copyright © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
Abnormal Power Section
Solder defect, Short/Crack
Fuse Open, Abnormal power section
Abnormal Display
Noise
GRADATION
26 / 36
LGE Internal Use Only
Appendix : Exchange PSU(LED driver)
No Light
Dim Light
Dim Light
Dim Light
No picture/Sound Ok
Copyright © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
27 / 36
LGE Internal Use Only
Appendix : Exchange the Module (1)
Panel Mura, Light leakage
Crosstalk
Panel Mura, Light leakage
Press damage
Press damage
Crosstalk
Un-repairable Cases
In this case please exchange the module.
Press damage
Copyright © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
28 / 36
LGE Internal Use Only
Appendix : Exchange the Module (2)
Vertical Block
Source TAB IC Defect
Horizontal Block
Gate TAB IC Defect
Vertical Line
Source TAB IC Defect
Horizontal Block
Gate TAB IC Defect
Gate TAB IC Defect
Vertical Block
Source TAB IC Defect
Horizontal line
Gate TAB IC Defect
Gate TAB IC Defect
Un-repairable Cases
In this case please exchange the module.
Horizontal Block
Gate TAB IC Defect
Gate TAB IC Defect
Copyright © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
29 / 36
LGE Internal Use Only
Standard Repair Process Detail Technical Manual
LCD TV
Error
symptom
B. Power error _No power
Content
Check front display LED
Established
date
Revised
date
2013. 02.15
A11
ST-BY condition: Red
Copyright © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
30 / 36
LGE Internal Use Only
Standard Repair Process Detail Technical Manual
LCD TV
Error
symptom
B. Power error _No power
Content
Check power input voltage and ST-BY 3.5V
Established
date
Revised
date
2013. 02.15
A12
Edge LED
Check the DC 24V, 12V, 3.5V.
18 Pin (Power Board ↔ Main Board) - 공통
Copyright © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
1
Power on
2
DRV ON
3
3.5V
4
PDIM
5
3.5V
6
N/C
7
GND
8
GND
9
24V
10
24V
11
GND
12
GND
13
12V
14
12V
15
12V
16
N.C
17
GND
18
GND
31 / 36
LGE Internal Use Only
Standard Repair Process Detail Technical Manual
LCD TV
Error
symptom
B. Power error _No power
Content
Checking method when power is ON
Established
date
Revised
date
2013. 02.15
A13
Edge LED
Check the DC 24V, 12V, 3.5V.
18 Pin (Power Board ↔ Main Board) - Common
Copyright © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
1
Power on
2
DRV ON
3
3.5V
4
PDIM
5
3.5V
6
N/C
7
GND
8
GND
9
24V
10
24V
11
GND
12
GND
13
12V
14
12V
15
12V
16
N.C
17
GND
18
GND
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Standard Repair Process Detail Technical Manual
LCD TV
Error
symptom
B. Power error _Off when on, off whiling viewing
Content
POWER OFF MODE checking method
Established
date
Revised
date
2013. 02. 15
A14
<ALL MODELS>
Entry method
1. Press the IN-START button of the remote controller
for adjustment
2. Enter to ENGINEER OPTION
3. Enter and Check POWER OFF HISTORY
Copyright © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
33 / 36
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Standard Repair Process Detail Technical Manual
Error
symptom
LCD TV
Content
C. Audio error_No audio/Normal video
Checking method in menu when there is no audio
Established
date
Revised
date
2013. 02.15
A15
<ALL MODELS>
Checking method
1. Press the MENU button on the remote controller
2. Select the AUDIO function of the Menu
3. Check whether TV Speaker is on
Copyright © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
34 / 36
LGE Internal Use Only
Standard Repair Process Detail Technical Manual
LCD TV
Error
symptom
C. Audio error_No audio/Normal video
Content
Voltage and speaker checking method
when there is no audio
<ALL MODELS>
Established
date
Revised
date
2013. 02. 15.
A16
Check the DC 24V, 12V,
3.5V.
18
②Pin (Power Board ↔ Main Board) -Common
②
1
Power on
2
DRV ON
3
3.5V
4
PDIM#1
5
3.5V
6
PDIM#2
7
GND
8
GND
9
24V
10
24V
11
GND
12
GND
13
12V
14
12V
15
12V
16
N.C
17
GND
18
GND
①
③
Checking order when there is no audio
① Check the contact condition of or 24V connector of Main Board
② Measure the 24V input voltage supplied from Power Board
(If there is no input voltage, remove and check the connector)
③ Connect the tester RX1 to the speaker terminal and if you hear the Chik Chik sound when you touch the GND
and output terminal, the speaker is normal.
Copyright © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
35 / 36
LGE Internal Use Only
Standard Repair Process Detail Technical Manual
LCD TV
Error
symptom
D. Function error_ No response in remote controller,
key error
Content
Remote controller operation checking method
Established
date
Revised
date
2013. 01 .09
A17
<ALL MODELS>
P600
②
③
①
1
2
3
4
5
6
7
8
9
GND
KEY1
KEY2
3.5V_ST
GND
LED_R/BUZZ
IR
GND
GND
Checking order
1, 2. Check IR cable condition between IR & Main board.
3. Check the st-by 3.5V on the terminal 4.
Copyright © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
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