Samsung CZ20F42TSXXEH Service Manual page 23

Troubleshooting
5-2 No Power
Check the 125V,
13.0V B + Lines
Check IC201S
Pin 1 : Stand-by : 0V
Normal : 3.3V
Check IC201S,
5-2
No
Yes
Check IC802
No
Pin 8 (8V)
Pin 9 (9V)
Pin 10 (5V)
Check IC201S No
Pin 1 (3.3V)
Yes
No
No
Pin 33 (H-out)
Check/Replace
IC801S, D801S, D802S,
D803S,D804S,FP801S
Check/Replace
IC802 (KA7632)
Check/Replace
IC201S
Check/Replace
IC201S, (µ-com).
Check/Replace
IC201S, Q401, Q402.
Samsung Electronics