Sony XR-55A75L Service Manual page 18

TROUBLESHOOTING
1.0 No Power - PSU
No Power
Check STBY 3.3V
Replace the Harness
NG
C1708 NG
between G-Board and
near CN1700 on Replace G-Board
BM5STY / BM5S21
BM5STY / BM5S21
board
board
OK OK
Harness
BM5STY / BM5S21
Board
u-Com Failure
DDCON/LDO
Main Device Failure
18
SYS SET