No Power: Ldos Check - Sony XBR-55X850C Service Manual

3-2-6. NO POWER: LDOs check check
START
Yes
Check Vcc voltage
No
C9xxx
Is voltage >3V?
Yes
Check Enable pin
No
voltage
Is voltage >3V?
Yes
Change LDO IC
XBR-55/65X850C, 855C, 857C, 75X850C, 855C
Check +3.3V_MAIN DDCON (IC9003)
No Power U-Com Failure
TROUBLE SHOOTING
141