Sony KD-55X8 G Series Service Manual page 40

1.3 No Power DDCON/LDO
BSL Board Model
Board Operation IC Ref
BSL LDO IC407
BSL LDO IC603
BSL LDO IC602
BSL LDO IC606
BSL LDO IC607
LDOs check
Voltage supply
1.2V_HDMI
1.05V_M3_ST_ET
1.05V_M3_STBY
2.5V_M3_DDR
1.8V_EMMC
Pleas refer page-29 for Ref number.
START
yes
no
Check Vin voltage
C4xx/C6xx
Is voltage >3V?
yes
no
Check Enable pin
voltage
Is voltage >3V?
yes
Change LDO IC
Check 3.3V_DDC_OUT
DDCON
(IC400 on BSL)
or
3.3V_STBY (G* board)
1.2 No Power U-Com Failure
or
Enable source
(Supplementary
information)
40