Samsung CS30A7HPTX/BWT Service Manual page 23

Troubleshooting
6-2 No Picture
Yes No
Check IC101 (TDA9810)
#10 (AGC), #12 (CVBS)
Check Feature
No Yes
Box Module M-Y/CVBS,
Check/Replace
H SYNC, HS2, Y, SC100
IC101, Tuner
Replace
Feature Box Module
Check IC201 (TDA4780)
No Yes
#14 (SC), #15 (ABL),
#19 (Cut off)
Check/Replace
Replace
IC501, IC502, IC503
TDA4780
on the CRT Board.
6-2 Samsung Electronics