Sony KD-55X8 G Series Service Manual page 25

1.2 No Power u-com Failure
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Check P_ON_#2
no
CL417 or
P-on u-com #pin13 (IC401)
is >3.0V?
yes
Check P_ON_HL
no
CL414 or
P-on u-com #pin18 (IC401)
is >3.0V?
yes
Check ORESETB
no
CL416 or
P-on u-com #pin14 (IC401)
Is the voltage >3.0V?
yes
Check X_SYSTEM_RST
no
CL412 or
P-on u-com #pin20 (IC401)
Is the voltage >3.0V?
yes
Check X_BL_MUTE
no
CL407 or
P-on u-com #pin8 (IC401)
Is the voltage >3.0V?
yes
BSL Board Model
Change IC401
Change IC401
Change IC401
Change IC401
SOC Muffin 3(IC1000) problem.
Check BL_ON
no
R527 or
P-on u-com #pin7 (IC401)
Is the voltage >3.0V?
yes
END
u-com IC401 is working OK
Change IC401
(Supplementary
25
information)