Samsung CS21A9W2QS/MUR Service Manual page 34

Troubleshooting
5-4 Horizontal Lines Appear or Screen
5-5 No TTX
5-4
Check
the IC301 B+
+16.5V, -16.5V
Normal
Check
the IC201s
Pin #21, #22
Normal
Check / Replace
the IC301
Check
Abnormal
the Voltage
of Heater
Normal
See the No Power
Abnormal
Check the
R305,D302
R304,D301
Abnormal
Check/Replace
the IC201S
Check/Replace
the IC201S
Samsung Electronics