Sony X900E Series Service Manual page 20

FLOW
1-1. NO POWER
WITH AC-ADP
No Power
Check POWER_MAIN
NG
C409
near CN400
on B* board
OK
(19.5V or 24V)
B* board
XBR-49/55/65/75X900E
NG
Replace
Between JK* board to
B* board Harness
OK
drive circuit around Q9002
Harness
u-Com Failure
DDCON/LDO
Main Device Failure
NG
(Both side are No power.)
NG
(Only single side is 19.5V or 24V.)
Check
F9000
On JK* board
OK
(Both side are
19.5V or 24V.)
Q9002 or
on JK* board
TROUBLE SHOOTING
AC Adaptor
F9000
20