Panasonic TH-42PF20E / TH-42PF20ER Service Manual ▷ View online
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TH-42PF20E / TH-42PF20ER
8 Service Fixture & Tools
8.1.
SC jig
Purpose:
To find the failure board (SC or SM) when the power LED is blinking 7 times.
SC jig:
Jumper connector to connect to SC50 connector on SC board
Part number:
TZSC09187
How to use:
Caution: Remove SC jig from SC board after inspection.
1. Remove all connector between SC board and SM board to isolate SC board from SM board electrically.
Note: The board will be damaged if all connector is not removed
2. Connect SC jig to connector SC50 at left bottom side of SC board.
3. Turn on the TV/Display Unit and confirm the power LED blinking.
3. Turn on the TV/Display Unit and confirm the power LED blinking.
LED blinking: Possible cause of failure is in SC board
No LED blinking (Lighting or no lighting): Possible cause of failure is in SM board
No LED blinking (Lighting or no lighting): Possible cause of failure is in SM board
4. After inspection, turn off the TV/Display Unit and wait a few minutes to discharge.
5. Remove SC jig from SC board.
5. Remove SC jig from SC board.
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TH-42PF20E / TH-42PF20ER
9 Disassembly and Assem-
bly Instructions
• To disassemble P.C.B., wait for 1 minute after power was off
for discharge from electrolysis capacitors.
•
, ,
, and marks indicate screw positions.
9.1.
Removal of Rear Cover
1. Remove screws (
×17 ,
×23 ) and M8 CAP (×4 )
then remove the Rear Cover.
9.2.
Removal of Slot Block
1. Disconnect the connectors (DS13, P9).
2. Remove the flexible cable from the connector (DS1).
3. Remove 4 screws and then remove the Slot Block.
2. Remove the flexible cable from the connector (DS1).
3. Remove 4 screws and then remove the Slot Block.
9.3.
Removal of DS-Board
1. Remove the Slot Block.
(Refer to Removal of Slot Block)
2. Turn over the Slot Block.
3. Remove 6 screws and then remove DS-Board.
3. Remove 6 screws and then remove DS-Board.
9.4.
Removal of HX-Board
1. Disconnect the connector (A14).
2. Remove 2 Hexagonal-Head screws, 5 screws ( ) and 2
2. Remove 2 Hexagonal-Head screws, 5 screws ( ) and 2
screws ( ) and then remove the HX-Board Block.
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TH-42PF20E / TH-42PF20ER
3. Turn over the HX-Board Block.
4. Disconnect the connector (HX1).
5. Remove 4 Hexagonal-Head screws and 1 screw of HX-
4. Disconnect the connector (HX1).
5. Remove 4 Hexagonal-Head screws and 1 screw of HX-
Board and then remove HX-Board.
9.5.
Removal of A-Board
1. Remove the HX-Board Block.
(Refer to Removal of HX-Board)
2. Disconnect the connectors (A5, A8, A9, A10, A11, A13,
A22, A25, A35).
3. Remove the flexible cables from the connectors (A1, A20,
A31, A32).
4. Remove 4 screws and then remove A-Board.
Note: when fixing A-Board
• Put the flexible Cable between the Fixed Metal and A-
Board when Connect the flexible Cable to the connector
(A1).
(A1).
9.6.
Removal of PB-Board
1. Disconnect the connectors (PB30, PB32, PB33, PB34).
2. Remove 2 screws and then remove PB-Board.
2. Remove 2 screws and then remove PB-Board.
9.7.
Removal of Fan
1. Disconnect the Fan Relay Connectors.
2. Remove 2 screws and then remove the Fan Block.
2. Remove 2 screws and then remove the Fan Block.
3. Remove each 1 screw and then remove the Fan from the
Fan Fixed Metal.
4. Remove each 4 Fan Corner Rubber Cushions from the
Fan.
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TH-42PF20E / TH-42PF20ER
5. Reassemble the Fans in reverse order.
6. Stick the Fan Sponges around the Fan.
6. Stick the Fan Sponges around the Fan.
Note:
The Fan Sponge is not re-usable.
Please use a new one when Fan exchange.
Please use a new one when Fan exchange.
9.8.
Removal of P-Board
1. Remove the Fan Block.
(Refer to Removal of Fan)
2. Disconnect the connectors (P2, P6, P7 P9, P11, P25,
P35).
3. Remove 9 screws and then remove P-Board.
9.9.
Removal of AC Inlet Assy
1. Disconnect the connector (P9).
2. Remove 2 screws ( ) and then remove the AC Cord
2. Remove 2 screws ( ) and then remove the AC Cord
Clamper A.
3. Remove 1 screw ( ) and then remove the AC Inlet Assy.
9.10. Removal of H3-Board
1. Disconnect the connector (H37).
2. Remove 1 screw and then remove the Speaker Terminal
2. Remove 1 screw and then remove the Speaker Terminal
Block.
3. Remove 2 screws (A) and then remove H3-Board.
9.11. Removal of SM-Board
1. Remove the Speaker Terminal Block.
(Refer to Removal of H3-Board)
2. Remove the flexible cables from the connectors (SM1,
SM2, SM3, SM4, SM5, SM6, SM7, SM8).
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