Panasonic TH-50PH12U Service Manual ▷ View online
17
TH-50PH12U
7.2.
No Power
First check point
There are following 3 states of No Power indication by power LED.
There are following 3 states of No Power indication by power LED.
1. No lit.
2. Green is lit then turns red blinking a few seconds later.
3. Only red is lit.
2. Green is lit then turns red blinking a few seconds later.
3. Only red is lit.
7.3.
No Picture
18
TH-50PH12U
7.4.
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
19
TH-50PH12U
8 Service Fixture & Tools
8.1.
SC jig
Purpose:
To find the failure board (SC or SU/SD) 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 SU/SD board to isolate SC board from both SU and SD board electrically.
Note: The board will be damaged if all connector is not removed (for example; remove connector only for SU board
and stay connecting with SD board. The boa
and stay connecting with SD board. The boa
rd will be damaged.)
2. Connect SC jig to connector SC51 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 SU or SD 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.
Remark: This SC jig can be used for all 2009 Plasma TV and Plasma Display.
20
TH-50PH12U
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 (
×8 ,
×29 ,
×4 ) and then remove
the Rear Cover.
9.2.
Removal of HHH-Board
1. Remove 4 screws (A) and then remove the HHH Terminal
Block.
2. Remove 4 screws (B).
3. Remove 2 screws (C) and then remove HHH-Board.
3. Remove 2 screws (C) and then remove HHH-Board.
9.3.
Removal of HA-Board
1. Remove 4 screws (D) and then remove the HA Terminal
Block.
2. Remove 4 screws (E).
3. Remove 3 screws (F) and then remove HA-Board.
3. Remove 3 screws (F) and then remove HA-Board.
9.4.
Removal of Slot Block
1. Remove the flexible cables from the connectors (DS1,
DS3).
2. Disconnect the connectors (DS2, DS4, DS6, DS7, DS8,
DS10, DS15).
3. Remove 5 screws and then remove the Slot Block.
9.5.
Removal of HX-Board
1. Remove the Slot Block.
(Refer to Removal of Slot Block)
2. Remove 6 screws and then remove the Slot Case.
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