Panasonic TX-L55ET5B / TX-L55ET5Y / TX-LR55ET5 Service Manual ▷ View online
Service Hints
How to remove the backcover
Remove the 4 fixing screws, the 1 fixing screw and WIFI DONGLE. (see Fig.5)
Remove the 38 fixing screws, 4 caps and the backcover. (see Fig.6)
How to remove the pedestal assembly.
Lay the main unit face down. (see Fig.7)
Remove the 4 fixing screws and the pedestal assembly. (see Fig.8)
Remove the 4 fixing screws and the pedestal assembly. (see Fig.8)
Fig.5
(1)
SCREWS
(1) THTD030J /1pcs/
(4) XYN4+F25FJK /4pcs/
(4) XYN4+F25FJK /4pcs/
(4)
(4)
(4)
(4)
Fig.7
Fig.8
(4)
(4)
(4)
(4)
(1)
(1)
(1)
(1)
SCREWS
(1) THTD030J /21pcs/
(2) THEC1509 /17pcs/
(3) TKKL5521 /4pcs/
(2) THEC1509 /17pcs/
(3) TKKL5521 /4pcs/
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(3)
(3)
(3)
(3)
Fig.6
(1)
(2)
(2)
(2)
(2)
(2)
(2)
(2)
(2)
(1)
(2)
(2)
(1)
(1)
(1)
(1)
(2)
(2)
(1)
(1)
(2)
(2)
(1)
(2)
(2)
(2)
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Chassis Board Layout
Location of Lead Wiring
To find the Part Number of required wire in Replacement Parts List click on the wire name in red box.
P-BOARD
K-BOARD
A-BOARD
FR-BOARD
GK-BOARD
Board Name
Function
A-Board
AV Terminal, HDMI, HDMI Switch, USB, USB HUB, Digital Audio Out,
Tuner DVB-T/T2/C, DVB-T/T2/C Dem, SD Card, CI slot, PC, Ethernet,
Wireless LAN, Peaks IC,Speaker out, EEPROM, Flash Memory, DDR SDRAM
FR-Board
Image Processor, SPI Flash
P-Board
Main Input, Power Supply
K-Board
Remote Receiver, Power and Timer LED, C.A.T.S
GK-Board
Key control, Power switch
A02
SP_L
A10
A20
K10
A15
SP_R
TC11
A10-K10 WIRE
P4-LD WIRE
WIFI DONGLE CABLE
P2
P4
A02-P2 WIRE
LVDS FFC
JK7101
LD
TC02
TC01
A12
TU6705
WIFI
A12-SPK WIRE
LVDS FFC3
LVDS FFC2
GK4
10
Technical Description
Specification of KEY for CI Plus, DTCP-IP, One-to-One, Widevine and Netflix
General information:
General information:
1. EEPROM (IC8902) for spare parts has the seed of KEY for each.
2. The final KEY data will be generated by LDA4 IC (IC8000) when SELF CHECK was done and are stored in both LDA4 IC
(IC8000) and EEPROM (IC8902).
All KEYs are not generated for all models.
The necessary KEY are only generated and stored depend on the feature of models.
2. The final KEY data will be generated by LDA4 IC (IC8000) when SELF CHECK was done and are stored in both LDA4 IC
(IC8000) and EEPROM (IC8902).
All KEYs are not generated for all models.
The necessary KEY are only generated and stored depend on the feature of models.
Replacement of ICs:
When LDA4 IC (IC8000) is replaced, EEPROM (IC8902) should be also replaced with new one the same time.
When EEPROM (IC8902) is replaced, LDA4 IC (IC8000) is not necessary to be replaced the same time.
After the replacement of IC, SELF CHECK should be done to generate the final KEY data.
How to SELF CHECK: While pressing [VOLUME ( - )] button on the main unit, press the STATUS button on the remote
control for more than 3 seconds.
TV will be forced to the factory shipment setting after this SELF CHECK.
When EEPROM (IC8902) is replaced, LDA4 IC (IC8000) is not necessary to be replaced the same time.
After the replacement of IC, SELF CHECK should be done to generate the final KEY data.
How to SELF CHECK: While pressing [VOLUME ( - )] button on the main unit, press the STATUS button on the remote
control for more than 3 seconds.
TV will be forced to the factory shipment setting after this SELF CHECK.
Model and Keys:
Keys
Model No.
CI PLUS
DTCP-IP
One-to-One
(for USB Rec.)
Widevine Netflix
TX-L55ET5B Yes
Yes
None Yes Yes
TX-L55ET5Y Yes
Yes
None Yes Yes
TX-LR55ET5 Yes
None
None Yes Yes
11
Setting Inspection
Voltage Confirmation
A board
Description Test
point Voltage
SUB1.1V
TP8100
1.10V - 1.22V
SUB 1.5 V
TP8101
1.435V - 1.585V
SUB1.8V
TP8700
1.7V – 1.9V
SUB3.3V
TP5400
3.17V – 3.43V
SUB5V
TP5420
4.80V - 5.25V
USB5V
TP5440
4.94V – 5.40V
FE1.2V
TP5780
1.14V – 1.26V
PNL12V
TP4004 (TP4005)
11.5V – 12.9V
P board
Description Test
point Voltage*
Voltage**
24V (PANEL)
TP7512/TP7513
<1V
24V ± 1.2V
16V TP7508/TP7514
<1V
16.1V ± 0.6V
5VS TP7507/TP7412
5.3V
±
0.1V
5.3V ± 0.1V
PFC
TP7201 and GND
TP7203***
<340V
390V ± 15V
* Connect AC 230V to JK7101 connector
** Connect DC 2.5V to TV_SUB_ON P2 connector – pin 7 /TP7506/ from voltage divider.
***Beware, for testing of PFC use the GND (TP7203) in Hot area of P board – risk of electric shock!
12
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