Sony KD-55X8 G Series Service Manual page 19

1.0 Overall Flow chart NO POWER G-Board
START
AC connect (80~288V)
Can TV power on?
No
Yes Yes
F6101
Fuse OPEN check
Case 1
No
No
STBY output check
(3.35~3.55V)
Yes
No
Power ON
Input check
(~3.3V)
Yes
Replace Power Supply
Replace Power Supply
RC can turn TV ON?
Yes
Case 2
12V output check
(12.2~13.2V)
Yes
BL_ON active HIGH
(~3.3V)
Yes
Case 3
LED output check
-Depends on PSU type
-Refer **note below
yes
Power supply
working normal
**Note:-
1.GL81=(93.2V~131.2V)
2.GL82=(83.3V~117.4V)
3.GL83=(73.6V~103.7V)
No
Main board problem
No
Replace Power Supply
No
Main board problem
Case 4
No
Yes
BL Err level check
(~2.8V)
No
Replace Power Supply
4. GL94=(157.1V~237.9)
5. GL93=(187.1V~237.9)
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