Sony XR-55X90K Service Manual page 40
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Also See for XR-55X90K:
- Service manual (90 pages) ,
- Setup manual (51 pages) ,
- Original manual (43 pages)
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TROUBLESHOOTING
1.3 No Power DDCON/LDO (LDO Check)
START
yes
Check Vcc voltage
C817
Is voltage >3V?
yes
Check Enable pin
voltage
Is voltage >3V?
yes
Change LDO IC
Check 3.3V_DDC_OUT
DDCON
no
(IC607 on BM5A)
or
3.3V_STBY (Power board)
no
1.2 No Power U-Com Failure
or
Enable source
Please Refer page 24 for Ref Number.
Board
Operation IC Ref
BM5STY
LDO
IC806
Voltage supply
1.8V_M5_ET_STBY
40
SYS SET
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