Panasonic TX-P42U20B / TX-P42U20E / TX-PR42U20 Service Manual ▷ View online
21
7.4.
No Picture
22
7.5.
Local screen failure
Plasma display may have local area failure on the screen. Fig-1 is the possible defect P.C.B. for each local area.
Fig-1
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8 Service Fixture & Tools
8.1.
SC jig
Purpose:
To find the failure board (SC) 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.
To find the failure board (SC) 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. Connect SC jig to connector SC50 at left bottom side of SC board
2. Turn on the TV/Display Unit and confirm the power LED blinking.
2. 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 SU or SD board
No LED blinking (Lighting or no lighting): Possible cause of failure is in SU or SD board
3. After inspection, turn off the TV/Display Unit and wait a few minutes to discharge.
4. Remove SC jig from SC board.
4. Remove SC jig from SC board.
Remark: This SC jig can be used for all 2010 Plasma TV and Plasma Display.
24
9 Disassembly and Assembly Instructions
9.1.
Remove the Rear cover
1. See PCB Layout (Section 3)
9.2.
Remove the AC inlet
Caution:
To remove P.C.B. wait 1 minute after power was off for dis-
charge from electrolysis capacitors.
charge from electrolysis capacitors.
1. Unlock the cable clampers to free the cable.
2. Disconnect the connector (P9).
3. Remove the screw (
2. Disconnect the connector (P9).
3. Remove the screw (
×1
) and remove the AC inlet.
9.3.
Remove the P-Board
Caution:
To remove P.C.B. wait 1 minute after power was off for dis-
charge from electrolysis capacitors.
charge from electrolysis capacitors.
1. Unlock the cable clampers to free the cable.
2. Disconnect the connectors (P2, P6, P7, P9, P11, P34 and
2. Disconnect the connectors (P2, P6, P7, P9, P11, P34 and
P35).
3. Remove the screws (
×9
) and remove the P-Board.
9.4.
Remove the Side terminal
cover and the Side shield metal
cover and the Side shield metal
1. Remove the screws (
×2 ,
×1 ,
×1 ).
2. Remove the Side terminal cover.
3. Remove the Side shield metal.
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