Sony KS-50R200A Service Manual page 142

No Picture or
Abnormal Picture
Lamp&Fan
are OK?
No
Yes
DEM
TEST Menu
No
is OK ?
Yes
CHECK
CN2000
CN2101
C Board Trouble shoot
CN2000
Yes
CN2002
CN2101
Cable is OK?
No
CN2000
CN2002 CN2101
Cable
CHECK
JL9000
Yes
is Low
Level?
No
Q2606-Base
MUTE2
CHECK
– 4-99 –
KS-50R200A/60R200A/70R200A
RM-GA006 RM-GA006
Power
Yes
Supply
is OK?
No
3.3V
NVM
2.5V
(IC2002, IC2200,
5V
IC2301)
15V
CHECK
CHECK
RM-GA006