Sony XBR-55X900H Service Manual page 21

2020/06/27 06:31:32 (GMT+09:00)
1.2 No Power u-com Failure
BM5 Board LCD Model
Previous page
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 Voltage.
Is the voltage >3.0V?
yes
SECTION 1
T R O U B L E S H O O T I N G
no
Change IC401
no
Change IC401
no
Change IC401
no
SOC Muffin 5 (IC1000)
problem.
SECTION 2
S E C T I O N 3
CL420
Is the voltage >3.0V?
u-com IC401 is working OK
SECTION 3 SECTION 4
no
Check BL_ON
or R471 Voltage.
yes
END
SECTION 5
Change IC401
21
SECTION 6
SYS SET