Sony XBR-55X900H Service Manual page 29
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Also See for XBR-55X900H:
- Service manual (108 pages) ,
- Reference manual (47 pages) ,
- Reference manual (29 pages)
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2020/06/27 06:31:32 (GMT+09:00)
1.3 No Power DDCON/LDO
BM5 and BM5S Board Model
START
yes
Check Vcc voltage
C4xx/C8xx
Is voltage >3V?
yes
Check Enable pin
voltage
Is voltage >3V?
yes
Change LDO IC
SECTION 1
T R O U B L E S H O O T I N G
Check 3.3V_MAIN
DDCON
no
(IC601 on BM5 / BM5S)
or
3.3V_STBY (G* board)
no
1.2 No Power U-Com Failure
or
Enable source
SECTION 2
SECTION 3
S E C T I O N 3
LDOs check
Board
BM5/BM5S
BM5/BM5S
BM5/BM5S
SECTION 4
Please refer page 25 - 26 for Ref number.
Operation
IC Ref
Voltage supply
LDO
IC403
3.3V_MAIN_H
LDO
IC806
1.8V_M5_ET_STBY
LDO
IC809
3.3V_M5_STBY
SECTION 5
SECTION 6
29
SYS SET
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Troubleshooting
