Sony GN1G Service Manual page 39

3-2-4. NO Power (DC/DC converter check)
c) 5.0V DDCON check
LD-Board model
Check input
F9013 voltage
Is voltage >19.0V?
Yes
KDL-50W800C, 805C, 807C, 809C/KDL-55W800C, 805C
START
Check fuse
No
F9013
Is fuse OK?
Yes Yes
G* Board model
Check input
F9013 voltage
No
Is voltage >12.0V?
Yes
Check EN signal
No
R9277 voltage
Is voltage >2.5V?
Yes
Check Vcc
No
C9185 voltage
Is voltage >5.0V?
Yes
END
Change F9013
No
G* Board/LD-Board
Refer No Power U-Com Failure
Change IC9021
TROUBLE SHOOTING
Size B* Board G* Board H* Board
50"
BMX Not applicable HSC3
55"
BMX Not applicable HSC3
39