Samsung CS21A9W2QS/MUR Service Manual page 32

Troubleshooting
5-2 No Video (Sound OK)
Check
the RK,GK,BK
Signal
Nornal
Check the
Voltage of heater
Nornal
Check
CRT and FBT
Check/Replace
5-2
Check
Abnormal
the R,G,B Signal
into PWB CRT
Abnormal
Check/Replace
R421, R513, D516
Abnormal Check IC201S
Pin 51, 52, 53
(R.G.B)
the IC201S
Check
the Voltage
Abnormal
of Heater
Check
the
CRT and FBT
Nornal
Abnormal
Abnormal
Nornal
Nornal
Check
Nornal
the IC501
B+(180V-B)
Check the
Abnormal
Resistance
of R512
Nornal
Check/Replace
the
D812, FBT
Re-Adjust
the S-Voltage
Replace
the R512
Samsung Electronics