Sony XBR-55X900H Service Manual page 21

2021/04/27 23:25:57 (GMT+09:00)
1.2 No Power u-com Failure
BM5 Board LCD Model
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Check P_ON_#2
CL417 or
P-on u-com #pin13
(IC401)is >3.0V?
yes
Check P_ON_HL
CL415 or
P-on u-com #pin18
(IC401)is >3.0V?
yes
Check ORESETB
CL416 or P-on u-com
#pin14 (IC401)
Is the voltage >3.0V?
yes
Check X_BL_MUTE
CL412 or R459
Is the voltage >3.0V?
yes
SAFETY NOTES
no
Change IC401
no
Change IC401
no
Change IC401
no
SOC Muffin 5 (IC1000)
Voltage.
problem.
SELF DIAGNOSTIC FUNCTION
T R O U B L E S H O O T I N G
u-com IC401 is working OK
TROUBLESHOOTING SERVICE ADJUSTMENT
no
Check BL_ON
CL420 or R471 Voltage.
Is the voltage >3.0V?
yes
END
DIAGRAM
Change IC401
21
HANDLING GUIDE
SYS SET