Viera Plasma Display
PC Board Recycling
Component Level Repair
Curriculum Content
Course 1

PCI PCB Recycling Program/Process

Model line-up/PC board functionality
Course 2

PCB Recycling Component Level Repair
Techniques
Course 3

Understanding How System Shut Down
Operates
Course 4

Troubleshooting Hints / Common Symptoms
END
Procedure for Returning Returnable PC board
Servicentre determines a returnable PC board is defective.
Servicecentre orders replacement PC board from Panasonic National Parts
After repairing the product, servicecentre returns the following to Panasonic
National Parts:
Returnable PC board/part
Completely fill out Returnable Parts Report form
Once Panasonic National Parts receives the defective sub-assembly with all the
required documents, They will:
•Forward a copy of Returnable Parts form to NWCS then payment is issued to
the servicentre.
•Note: for O/W: NP Issues dud credit payment to servicentre for returning the
defective sub-assembly.
Returnable Parts Return Form:
Must be completely filled
out and sent together with
the defective PC board.
If a board is being returned
that is unused please
clearly mark the form as
unused.
Model line up and PC board
functionality
2005/2006 PDP Line-up
2006
2005
TH-58PX600
TH-50PX500
HD Step Up Model
TH-42PX600
TH-42PX500
TH-58PX60
TH-50PX50
TH-42PX50
HD Leader Model
TH-37PX50
TH-42PD50
TH-50PX600
TH-50PX60
TH-42PX60
TH-37PX60
SD Leader Model
TH-42PD60
2005 & 2006 PC Board Difference (for 50” models)
2005: 50PX500/PX50
C1
C2
C3
D
P
Fan Control
Audio Power
DG
Scan Drive
Z
Audio
Amp
SD
GS
SD Card
C3
SS
DT
PA
Digital
D-TV Interface
Signal
Processor
SC
Scan Drive
SS
DG
Sustain
Drive
DT
SD
D
SS3
C5
Terminal
PC Card
Power
Supply
DC-DCConverter
D-TV
Interface
HDMI
G Front
P
PA
DC-DCConverter
DV
H
SS2
Sustain
Drive
AV Terminal
C6
C2
SU
Power
Supply
Format Converter
Plasma AI Processor
SC
C1
SS2
PB
SU
2006: 50PX600/PX60
C4
GK
Key SW
C6
K
S
REMOTE, LED
POWER SW
C5
GS
SD Card
HC
G Front
AV Terminal
Terminal
PX500only
Differences
1. The PB and Z board are now on the PA Board
2. Location of the PA and D board was changed
3. HDMI interface (DV) relocated.
4. HC board added （ factory use)
SS3
H
GK
Key SW
C4
K
REMOTE, LED
S
POWER SW
2005 & 2006 PC Board Difference (for 42 & 37”
models):
2005: 42/37/PX500/PX50/PD50
C1
C2
SS2
PB
SU
D
P
Fan Control
Audio Power
SC
DG
Scan Drive
Z
Audio
Amp
SS
DT
PA
Digital
D-TV Interface
Signal
Processor
H
HDMI
C4
GS
SD Card
Scan Drive
G Front
Terminal
PC Card
GK
Key SW
H
DG
SS3
C3
C1
K
S
REMOTE, LED
POWER SW
GS
SD Card
PX500only
D
AV Terminal
HC
G Front
C2
Terminal
GK
Key SW
K
S
REMOTE, LED
POWER SW
PX600/60only
Differences
1.
2.
3.
4.
5.
6.
Sustain
Drive
D-TV
Interface
SD
AV Terminal
SS
DT
DC-DCConverter
DV
Power
Supply
DC-DCConverter
SC
Sustain
Drive
P
PA
SU
Power
Supply
Format Converter
Plasma AI Processor
SD
2006: 42/37/PX600/PX60/PD60
The PB and Z board are now on the PA Board
Location of the PA and D board was changed
HDMI interface (DV) relocated.
HC board added （ factory use)
Reduce the upper C boards for single scan.
Reduce the S2 and S3 boards.
2005 Plasma TV PC Board List
PCB
Description
TH50PX5
00
TH42PX500
TH50PX50
TH42PX50
TH37PX50
TH42PD50
SU
Scan Out (Upper)
TNPA321
TNPA3219A
TNPA3189AB
TNPA3189AB TNPA3551
9AB
B
TNPA3242
SD
Scan Out (Lower)
TNPA322
TNPA3220A
TNPA3190AB
TNPA3190AB TNPA3552
0AB
B
TNPA3243
SC
Scan Drive
TNPA356
TNPA3557
7
TNPA3567
TNPA3557
TNPA3573
TNPA3543
SS
Sustain Drive
TNPA356
TNPA3558
8
TNPA3568
TNPA3558
TNPA3574
TNPA3544
P
Power Supply
ETXMM5 ETXMM563M ETXMM564 ETXMM563
64MEK
DK
MEK
MDK
D
Format Converter/Plasma TZTNP01 TZTNP010YD TZTNP010Y TZTNP010YD TZTNP010Y TZTNP010Y
AI Processor
0YCS
S
CS
S
ES
FS
DG
Digital Signal Processor
TNPA362
TNPA3625
5AB
TNPA3625A
TNPA3625A TNPA3625A
TNPA3625AC
D
E
F
DV
HDMI Interface
TNPA362
TNPA3626
6
TNPA3626
TNPA3626
TNPA3626
TNPA3626
DT
ATSC Interface
TNAG157
TNAG157S
S
TNAG146S
TNAG146S
TNAG146S
TNAG156
C1
C1 Data Driver
TNPA356
TNPA3553AB TNPA3561
1
TNPA3553
TNPA3547
TNPA3545
C2
C2 Data Driver
TNPA356
TNPA3554
2
TNPA3562
TNPA3554
TNPA3548
TNPA3546
C3
C3 Data Driver
TNPA356
TNPA3555
3
TNPA3563
TNPA3555
TNPA3549
NONE
C4
C4 Data Driver
TNPA356
TNPA3556
4
TNPA3564
TNPA3556
TNPA3550
NONE
C5
C5 Data Driver
TNPA356
NONE
5
TNPA3565
NONE
NONE
NONE
C6
C6 Data Driver
TXNC61B
NONE
HTUJ
TXNC61YCS
NONE
U
NONE
NONE
PA
DC-DC Converter/Power
SOS
TNPA362
TNPA3620AE TNPA3620
0AE
TNPA3620
TNPA3620
TNPA364
TNPA3643A
TNPA3620
TNPA3570A
TNPA3570
B
TNPA3643A
2006 Plasma TV PC Board List
2005 & 2006 PC Board Difference:
Easier connection and parts change
Connecting behind the board
Connecting on the board
Lead connector
→
After
Before
After
SU board
Before
Bridge connector
General Signal Circuit Flow for
Input Source
2006 Model (42V & 37”):
Signal Processor
Panel Drive
DT
GS
PX600
PX60
only
H
SU
DG
D
SC
Panel (HD or SD)
SD
K
G
GK
C1
HDMI
PX600
PX60
only
SPEAKER
（ L/R ）
PA
DT: ATSC Interface and tuner
H : AV Terminal / AV Switch
PC (PX600 Only)
GK: Key Switch
K : Remote Receiver / Power LED
G : Front terminal
GS: SD Card Slot (PX600/60 Only)
C2
DG: Digital Signal
Processor
/ HDMI Interface
D : Format Converter
/ Plasma AI Processor
/ Sub-Field Processor
PA: Audio AMP
/ Speaker out
SC: Scan Drive
SU: Scan Out (Upper)
SD: Scan Out (Lower)
SS: Sustain Drive
C1: Data Drive (Right)
C2: Data Drive (Left)
SS
General Video Signal Processing: PX600/60 series
GS
Digital
SD Card
HDMI2
DT
H
V
IC4026
DG
HDMI
I/F
HDMI1
IC8211 IC8240
ATSC PEAKS
LITE
LSI
TUNER
Analog
IC1103
MAIN
MICRO
PROCESSOR
Included OSD
Y/C (for Monitor Out)
R,G,B,HS,VS
PC
OSD
IC2601
IC2601
AV1
AV2
Y,C / V
Y,Pb,Pr (Main)
VIDEO
SWITCH
Y,C / V
Y,Pb,Pr (Sub)
Comp.1
Comp.2
Y,Pb, Pr
Y,Pb,Pr
Monitor Out
R,G,B :10Bit
(MAIN)
IC4019
10bit A/D
R,G,B :10Bit
IC4037
GC5
IC4020
GC3 FS
IC4036
LVDS Signal
LVDS (*1)
TRANSMITTER
To D Board
R,G,B :10Bit
(Sub)
Y/C
G
Y,C / V
AV3
(*1) LVDS : Low Voltage
Differential Signaling
<H Board>
IC2601 : VIDEO SELECT
PX600 only
<DG Board>
IC4019 : A/D CONVERTER (10Bit)
IC4020 : SIGNAL PROCESSOR (For SUB WINDOW)
IC4037 : SIGNAL PROCESSOR (I/P CONV. ,RESIZE MIX … )
IC4036 : LVDS TRANSMITTER
IC1103 : MAIN MICRO PROCESSOR
Thank You
For Completing Course One
Course Two
PCB Recycling Component Level Repair
Techniques
Viera Plasma Display PC Board Recycling
Component Level Repair
Course 2
PCB Recycling Component Level Repair Techniques
Adjustments Procedure
The following adjustment procedures are mandatory after replacing the
SC, SS & P boards. It is also required if the Panel is replaced.
I. Item preparation:
1. Input a white signal. (please refer to the next slide on several
ways to generate a white pattern).
2. Set picture controls as follows:
Picture menu: Dynamic
P-NR: OFF
Aspect: 16:9
CAUTION:
1.
Perform Vsus adjustment first.
2.
Confirmation of Vscn voltage should be done after confirmation of
Vad adjustment.
When Vad = -105V, Vscn voltage is 35V +/- 4V.
Several ways to generate White Pattern signal:
1. External pattern generator.
2. Internal white pattern in Service mode.
(Please see next slide on how to enter Test Pattern Mode).
3. Disconnect LVDS cable DG5 on the DG board to display white
pattern.
Entering Test Pattern Mode:
Test Pattern
White
Scroll
Red
A and B zone
Green
Color bar
Blue
1% window
ON/OFF Aging
Ramp Blue
Ramp white
Ramp Green
Ramp Red
How to enter test pattern mode:
1. While pressing "VOLUME-" button of the TV set, press
“RECALL” button of the remote control three times
within 2 seconds.
2. Push button "1" of remote control several times, and
select "OPTION” setting.
3. Press "OK" button of Remote controller for three seconds
or more to place the unit in the test pattern mode.
II. Driver Adjustment TH42PX60
Name
Test Point
Voltage
Volume
Remarks
Vsus
TPVSUS (SS)
Vsus ± 2V
VR251 (P)
*
Ve
TPVE (SS)
Ve ± 2V
VR6000 (SS)
*
Vset
TPVSET (SC)
280V ± 7V
Fixed
Vad
TPVAD (SC)
-105V ± 1V
VR6600 (SC)
Vscn
TPVSCN (SC)
Vad+140V ± 4V
Fixed
Vda
TPVDA (SS)
75V ± 1V
Fixed
Adjustment
voltage
III. Initialization Pulse Adjustment
1. Input a White signal into the unit.
2. Set picture controls as follows:
Picture Menu: Dynamic
P-NR: OFF
3. Connect oscilloscope probe to test point TPSC1 (T2).
Adjust VR6602 to obtain 195 +/- 10 µsec for T2.
Note: Connect oscilloscope’s negative probe to common ground
(Please use panel metal chassis as common ground)
Adjustment necessary when PC board exchanged
Adjust the following voltages using a multimeter:
PCB
Adj Pt
TP
Voltage
Volume
Vsus
TPVSUS (SS)
*Vsus +/-2V
R628(P)
Vdat
P12-1,5(P)
75.5+/-0.1V
R665(P)
PFC
C445(P)
396V+/-0.5V
R443(P)
SC
Vad
TPVAD(SC)
-105+/-1V
VR6600(SC)
SS
Ve
TPVE(SS)
*Ve+/-2V
VR6000(SS)
P
D, DG
White balance and black pedestal level confirmation necessary.
*Please refer to Panel label for set value.
Caution: Do not adjust Vsus below Ve to avoid damage to PCB.
Common symptoms experienced if the adjustment
is not performed
•
•
•
•
•
Several images maybe displayed at the same time.
Excessive brightness.
Low brightness.
Wrong hue/color.
Reduction of the life of the panel.
POWER SUPPLY
Sequence of events when Plasma TV is plugged
in
When a Plasma TV is plugged in, there are a few indications of normal
operation. Knowing these will help us understand what’s going on with
the unit when an abnormality occurs.
1. There is a click from relay RL402 and RL403
when they are
activated.
2. The LED in the optical jack (inside the DT board) turns ON for
approximately 4 seconds.
3. Immediately after, the relay click the Tuner LEDs turn ON for
approximately 20 seconds.
4. The LED in the optical jack turns ON again for approximately
1 second and both LEDs (tuner and optical jack) turn OFF.
5. Then another click is audible from relays RL402 & RL403,
indicating that they are no longer engaged. Note at this time, LEDs
(for Tuner & optical jack) are turned OFF.
Standby Block (Part1)
Standby Block (Part2)
Power Supply (Standby Circuit)
STB 5V Distribution
Power Supply (Standby Circuit)
STB5V, STB3.3V & STB1.5V
P
F-STB-ON (Primary)
P
F-STB-14V
P
STB5V and TV-SUB-ON function on PA board
P
A
SUB-Voltages Output from the PA board
PA Board Test Points
POWER ON
POWER ON
Panel Standby ON Circuit
3.3
v
Power Supply Secondary Circuit
VSUS and VDA Circuit
PA Board Circuit Explanation
Main voltages output from the PA Circuit
5V Distribution
VSUS Distribution
Troubleshooting Guide
Can the click sound from the relay be
Heard after the TV is plugged into the wall
Outlet?
NO
YES
Is there a 5V at pin1 of connector PA40 on
the PA board?
Wait for approx. 20 sec. after applying power
then turn the power ON.
NO
YES
Replace P Board
Can the click sound from the relays be heard while
attempting to turn the power ON?
Is there 2.5V at pin 13 of
connectorP25 on the P Board?
YES
Replace P Board
NO
Replace DG Board
NO
YES
Is there 3.3V at pin 1 of connector
HC01 on the HC Board?
Replace P Board
YES
Replace D Board
NO
Is there 2.5V at pin 17 of
connector P25 on P Board?
YES
Thank You
For Completing Course Two
Course Three
Understanding How System
Shut Down Operates
Viera Plasma
Display PC Board Recycling Component Level Repair
Course 3
Understanding how System Shut Down operates
Possible causes of shutdown

A short circuit on the voltage lines.

Over-voltage condition.

Abnormality in the Control Drive Pulse circuit i.e.
SC, SS, SU or SD boards.

Missing source voltage to the PA board (STB14V) from
P board.

Missing output voltage from the PA board to the DG
board.

Missing 15V or Vsus on either SS or SC board while
the control drive pulses from the D board are being
provided.
D BOARD SOS DETECT
D Board SOS detect
SOS line
Line
Monitored
15V
# of times
LED blinks
2 blinks
3 blinks
SOS 4
P3.3V(15V &
STB5V)
PS
SOS 5
5V
5 blinks
SOS 6
SC1
6 blinks
DRV RST
5V DET
6 blinks
SOS 7
SC2
7 blinks
SOS 8
SS
8 blinks
SOS 2
SOS 3
4 blinks
DG BOARD SOS DETECT
DG Board SOS detect
SOS line
Line Monitored
# of times
LED blinks
STB 3.3V DET
STB 3.3V
10
MAIN 3.3V DET
MAIN 3.3V
10
SUB 5V DET
SUB 5V
10
SUB 9V DET
SUB 9V
10
PA-TUNER-SOS PA & Tuner +30V
10
FAN SOS
FAN CIRCUIT
11
SOUND
SOUND OUTPUT
CIRCUIT
12
PA Board Test Points
PA Board Over Voltage Protection
PA Board Loss of Sub-Voltage Protection
PA Board Loss of Main-Voltage Protection
PA Voltage Output
PA SOS Detect Circuit
LED BLINKING 10 TIMES
When the power LED blinks 10 times right after the Plasma TV has
been plugged in to the AC source, the possible defective boards are:
P Board
PA
Board
DG
Board
H
Board
DT
Board
How to Rule out the P Board
1.
Use a Peak Hold Meter for voltage reading
NOTE: Follow this procedure when the click sound of the relay can be heard
after the unit is plugged in. If the relay does not click, check the STB 5V
from the P board. If the STB 5V is missing, the P board may be defective.
(If STB 5V is OK, the DG board may be defective.
2.
Disconnect Connector P10 on the P board. (Make sure that the TV is
unplugged)
3.
Because you only have 2 – 3 seconds to measure the STB14V, place your
meter’s probe at pin 1 of connector 10 of the P board before plugging the
TV in to the AC line.
4.
Plug the TV in to the AC line while still holding the probe at Pin 1.
5.
Check to see if the 14V comes up. If it does not come up the P board is
defective. If it does, (since it may take some involvement to determine
which of the PA or DG board is defective) it is OK to order both the PA and
DG board together.
To rule out H Board
1.
Disconnect connector H40 then plug Plasma TV
to AC line.
2.
If the power LED stops blinking, the H board
may be defective, otherwise another board is
causing the problem.
NOTE: It is recommended that the PA board be
replaced at the same time if the H board is
suspected to be defective and will be replaced.
To rule out the DT (Digital Tuner) Board
1.
Remove the DT board and then plug the Plasma TV
into an AC source.
Note: When the DT board is removed, the unit will still
power up but all functions are disabled due to the
lack of data communication
2.
If the power LED stops blinking the DT may be
defective otherwise, another board is causing the
problem.
3.
Other possible causes of blinking are the PA or DG
board.
D Board SOS Detect
DG Board SOS Detect
DG Board SOS Detect
15V Distribution
15V SOS
LED BLINKING 5 TIMES
• This blinking code is caused by an
abnormalities in the 5V voltage supply line.
• Other possible cause is a problem in Vda
supply voltage line.
5V Distribution Line
5V SOS
Other Cause of 5V SOS
• The Power LED can also blink 5 times if the
Vda voltage is shorted. This is normally
caused by the Panel demultiplexer ICs.
5V & Vda Distribution on the C Board
Procedure to properly isolate C Board
• When the ribbon cables from the D board to the C
boards are disconnected in order to isolate the C
boards, the LED will blink 6 times.
• To properly isolate the C boards to avoid 6 blinks,
TP9387 (on the D board) should be grounded by a
1Kohm resistor.
Note: The next slide will show reasons why SOS 6
blinks is generated when the ribbon cables are removed.
• The Vda connector should also be disconnected.
Drive Reset Circuit
BT30V (Tuner SOS) Detect Circuit
D2663
Sound SOS Detect Circuit
Digital Temperature Sensor
Digital Temperature Sensor
Digital Temperature Sensor (continued)
Fan SOS
Fan SOS
• To determine if the fan is the cause of the 11 blinks,
simply use a peak hold meter to determine if pin 3 of the
fan connector goes high before shutdown.
• If it does, the fan is defective.
• If not, check the other fans and the fan drive circuitry.
No Video and No OSD
Determining whether a no video or no OSD symptom is caused by the
video process or the panel drive circuit
Isolation of SC & SS Board
• If any of the connectors providing the 15V
or Vsus voltage to the SC or SS board is
disconnected, while the connectors providing
the scan and sustain drive pulses are present
coming from the D board, the Plasma TV will
shutdown.
Isolation of the SC & SS Board
Isolation of SC Board
SC2, SC23 & SC20 Disconnected
In this condition, when the SC2 SC20 & SC23 are disconnected the
SC board is completely isolated from sources (P and D board).
The power LED stays on and the panel is primed as seen on this picture.
Expectations when isolating SC Board
7
Isolation of SC Board
Sometimes the TV will go into
Shutdown indicating that the
problem is located on the
SC Board. This does not necessarily
mean that the SC board is the
cause of the Problem.
Isolation of SC Board
Isolation of SU Board
Isolation of SD Board
Isolation of SS Board
Isolation of SS Board
Isolation of SS Board
Isolation of SS Board
SS23 Disconnected on the SS board
(No Drive pulses from the D board)
No VDA voltage to the C boards
(Reason why the screen is black)
Isolation of SS Board
Missing Drive Pulses from the D board
SS11 and SS23 Disconnected, but VDA voltage provided to pin 12 of
SS23 cable
Defective D Board
Defective D Board
Defective SC Board
Defective SC Board
Thank You
For Completing Course Three
Course Four
Troubleshooting Hints /
Common Symptoms
Viera Plasma Display PC Board Recycling
Component Level Repair
Course 4
Troubleshooting Hints / Common Symptoms
Common Problems
1. Model: TH37PX50
PCB designation: SC Board
Part #: TNPA3573
Symptom: Dead/LED off (no blinking code).
Cause: Vsus voltage line shorted to ground due to shorted transistors.
Remedy: Replace Q6611, Q6612, Q6613, Q6613, D6609, open R6710 & R6708.
After replacement, check that Vsus line is no longer shorted to ground.
R6708 & R6710:
D6609:
Part No.ERX2FJSR22D
Part No.B0HBSN000008
VSUS
Q6611-Q6613:
Part No.B1JADN000002
Please refer to the attached Technical
Bulletin TT-08-02
Common Problems
2. Model: TH42PD50
PCB designation: SC Board
Part #: TNPA3543
(1)
(2)
(3)
Symptom: Picture pixelized @ area horizontally across the screen.
Cause: Initialization pulse T2’s level settings is misadjusted.
Remedy: Adjust VR6557 to obtain specified level settings (T2=184 µsec).
(Please refer to service manual for complete Initialization Pulse Adjustment
procedure).
Please refer to the attached Technical
Bulletin TT-08-05
Common Problems
3. Model: TH42PD50
PCB designation: C1 Board
Part #: TNPA3545
Symptom: Blue vertical line @ right most edge of the screen.
Cause: Missing data line.
Remedy: Open R7125
R7125:
Part No.ERJ6GEYJ102
Please refer to the attached Tech
Bulletin TT-08-03
Common Problems
4. Model: TH42PD50
PCB designation: SC
Board
Part #: TNPA3543
Q6511 & Q6512:
Part No.B1DFGL000008
Symptom: After pressing power button, unit shutdown then LED blinks 7X
Cause: SOS protection circuitry detects problem in scan output waveform Vf
due to shorted scan output transistor Q6511.
Remedy: Replace both Q6511 and Q6512 at the same time.
Please refer to the attached Tech
Bulletin TB-08-04
Common Problems
5. Model: TH42PX50 / TH42PX500
PCB designation: SC Board
Part #: TNPA3557
Symptom: Distorted picture.
Cause: Missing TPVSET voltage due to open R6602 & shorted
C6526
Remedy: Replace
Parts list
1. R6602:
Part No. ERG1FJS471D
2. C6526:
Part No. ECA2AHG470
R6602 & C6526.
Please refer to the attached Tech
Bulletin TB-08-09
Common Problems
6. Model: TH42PX50 / TH42PX500
PCB designation: SC Board
Part #: TNPA3557
Symptom: After pressing power button, unit shutdown then LED
blinks 7X
Cause: SOS protection circuitry detects problem in scan output
waveform Vf due to shorted scan output transistor Q6511.
Remedy: Replace
time.
both Q6511 and Q6512 at the same
Q6511 & Q6512:
Part No.B1DFFM000003
Please refer to the attached Technical
Bulletin TT-08-08
Common Problems
7. Model: TH42PX50 / TH42PX500
PCB designation: P Board
Part #: ETXMM563MDK
Symptom: Dead/relay will not click & LED remains off (no blinking
code).
Cause: No output from power output control module.
Remedy: Replace
MC701.
MC701 (Power Output Control Module)
Part No.IXMM564M-D-9
Please refer to the attached Technical
Bulletin TT-08-07
Common Problems
8. Model: TH42PX50 / TH42PX500
PCB designation: P Board
Part #: ETXMM563MDK
Symptom: Dead/relay will not click &
LED remains off (no blinking code).
Cause: No standby voltage.
Remedy: Replace
IC501.
Parts list
IC501
Part No.MIP3E30MP
Please refer to the attached Technical
Bulletin TT-08-06
Common Problems
9. Model: TH50PX50 / TH50PX500
PCB designation: SC Board
Part #: TNPA3567
Symptom: After pressing power button, unit shuts down then LED blinks
7X
Cause: SOS protection circuitry detects problem in scan output
waveform Vf due to shorted scan output transistor Q6604 & Q6654.
Remedy: Replace Q6604 and Q6654.
Parts list
Q6604 & Q6654:
Part No.B1DFFM000003
Please refer to the attached Technical
Bulletin TT-08-12
Common Problems
10. Model: TH50PX50 / TH50PX500
PCB designation: SS Board
Part #: TNPA3568
Symptom: Upon power ON, relay clicks then LED blinks 8X.
Cause: No sustain pulse output waveform due to shorted D6020 and/or D6021.
Remedy: Replace both: D6020 & D6021 at the same time.
Parts list
D6020 & D6021:
Part No.B0HBSN000008
Please refer to the attached Technical
Bulletin TT-08-01
Common Problems
11. Model: TH50PX50 / TH50PX500
PCB designation: P Board
Part #: ETXMM564MEK
Symptom: Dead/relay will not click &
LED remains off (no blinking code).
Cause: No primary supply to T501
thereby no secondary voltage outputs.
Due to open in-rush current limiter K601
& open RF601.
Remedy: Replace K601 & RF601.
Parts list
K601:
Part No. DG12D1-0
RF601:
Part No.HUF5K100J14
Please refer to the attached Technical
Bulletin TT-08-11
Common Problems
12. Model: TH50PX50 / TH50PX500
PCB designation: P Board
Part #: ETXMM564MEK
Symptom: Upon power ON, relay
clicks then LED blinks 10X.
Cause: No switching voltage output
from F14_ON or 12V/15V_ON pins..
Remedy: Replace power module
MC501.
Parts list
MC501:
Part No.IXMM564M-C-9
Please refer to the attached Technical
Bulletin TT-08-10
Common Problems
13. Model: TH50PX60 / TH50PX600
PCB designation: SC Board
Part #: TXNSC1BHTUJ
Symptom: Very intermittently unit shutdown and
LED blinks 7X.
Cause: No solder @ pin 4 of IC6773.
Remedy: Resolder pin 4 of IC6773.
IC6773
SC BOARD
Common Problems
14. Model: TH42PD60
PCB designation: P Board
Part #: TXN/P1ZQTUS
Parts list
1. Q412 & Q413:
Part # - B1DAGQ000013
Q41
Q41
2
3
2. Q408 & Q409:
Part # - B1DHCD000034
R47
8
Q40
8
3. R478:
Part # - ERJ8GEYJ220
4. PR401:
Part # - K5Y502BA0001
PR401
Symptom: Shuts down with power LED blinking 10x.
Cause: Missing 395Vdc output due to shorted Q412 & Q413.
Remedy: Replace Q412, Q413, Q408, Q409, R478 & PR401 on
the P board.
Q40
9
Common Problems
15. Model: TH42PD60
PCB designation: P Board
Part #: TXN/P1ZQTUS
Parts list
1.Q406:
R41
0
F401 &
F40
2
Part # - B1DEHQ000014
2.R410:
Part # - D1F5100E0003
3.F401 & F402:
Q40
Part # - K5D802BNA005
6
Symptom: Dead/power LED off (no blinking code).
Cause: No primary AC voltage inputs due to open fuses caused by
Q406 shorting out.
Remedy: Replace F401, F402, Q406 & check/replace thermal
resistor (R410) on the P board.
Common Problems
16. Model: TH42PX60
PCB designation: D Board
Part #: TNPA3810AHS
Symptom: Picture disappears after few minutes but sound is OK.
Cause: Low Ldo_5V supply to IC9800 (DC to DC Converter) due to
leaky D9801.
Remedy: Replace D9801 on the D board.
D980
1
Parts List
D9801:
Part # - B0JCDD000002
Common Problems
17. Model: TH42PX60
PCB designation: P Board
Part #: TXN/P1BFTUS & TXN/P1BFTU
Q41
Q41
2
Parts list
1. Q412 & Q413:
Part # - B1DAGQ000070
2. Q408 & Q409:
Part # - B1DHCD000034
Q40
Q40
9
8
3. PR401:
Part # - K5Y502BA0001
PR401
Symptom: Shuts down with power LED 10 blinks.
Cause: Missing 395Vdc output due to shorted Q412 & Q413.
Remedy: Replace Q412, Q413, Q408, Q409 & PR401 on the P
board.
3
Common Problems
18. Model: TH37/42PX60&42PX600
PCB designation: P Board
Part #: TXN/P1BKTU (for TH37PX60),TXN/P1BJTUS (for TH42PX60)
& TXN/P1BFTUS (for TH42PX600)
R41
Parts list
0
1.Q406:
Q40
6
Part # - B1DEKQ000003
2.R410:
F401 &
F40
2
Part # - D1F5100E0003
3.F401 & F402:
Part # - K5D802BNA005
Symptom: Dead/power LED off (no blinking code).
Cause: No primary AC voltage inputs due to open fuses caused
by Q406 shorting out.
Remedy: Replace F401, F402, Q406 & check/replace thermal
resistor (R410) on the P board.
Thank You
For Completing Course Four
-END –
HAVE A NICE DAY