Read Sony KDL-55X4500 Service Manual online
KDL-55X4500 (CH) 2-12E
GL board check
CN6788
LED_xMUTE
more than 1V?
No
Signal board has problem.
Check signal-board
Check signal-board
Panel has problem.
Check Panel
Check Panel
GL board may have problem.
Change GL board.
Change GL board.
Picture OK?
No
Yes
CN6730
PFC_OUT
=390V
±
5%
No
G6 board has problem.
Change G6 board
Change G6 board
CN6930
PFC_OUT
=390V
±
5%
No
G7 board has problem.
Change G7 board
Change G7 board
Yes
Yes
GL board has broken.
Yes
G6 board
CN6505 1-2pin
=20V
±
30%
Yes
No
G6 board has problem.
Change G6 board
Change G6 board
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