Sony KD-55A9F Service Manual page 21

1.2 No Power u-com Failure
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Check P_ON_#2
no
CL813 or
P-on u-com #pin13 (IC800)
is >3.0V?
yes
Check P_ON_HL
no
CL811 or
P-on u-com #pin18 (IC800)
is >3.0V?
yes
Check ORESETB
no
CL812 or
P-on u-com #pin14 (IC800)
Is the voltage >3.0V?
yes
Check X_SYSTEM_RST no
CL810 or
P-on u-com #pin20 (IC800)
Is the voltage >3.0V?
yes
no
Check OPCTRL4 (BL_MUTE)
R815 or
P-on u-com #pin8 (IC800)
Is the voltage >3.0V?
yes
Change IC800
Change IC800
Change IC800
Change IC800
Check "X_BE_RST" (from SOC Muffin).
*If X_BE_RST is >3.0, SOC BE(IC7000) problem.
Otherwise, SOC Muffin 3(IC1000) problem.
BM3 Board OLED Model
Check BL_ON
no
R828 or
P-on u-com #pin7 (IC800)
Is the voltage >3.0V?
yes
END
u-com IC800 is working OK
Change IC800
21
SYS SET