Sony XR-65X95K Service Manual page 26

TROUBLESHOOTING
1.3 No Power – DDCONs & LDO check
START
yes
Check VCC voltage
no
C4xx/C8xx
Is voltage >3V?
yes
Check Enable pin
no
voltage
Is voltage >3V?
yes
Change DDCON
Or LDO IC
Check 3.3V_STBY (G- board)
1.2 No Power U-Com Failure
or
Enable source
Please refer page 23 for Reference Number
Board Operation
BM5S22B DC/DC IC418 / IC419
BM5S22B LDO
BM5S22B LDO
BM5S22B LDO
IC Ref Voltage supply
5.0V_STBY_H
IC403 3.3V_MAIN_H
IC806 1.8V_M5_ET_STBY
IC809 3.3V_M5_STBY
26
SYS SET