Samsung CS29Z7HRGX/XTT Service Manual page 42

Troubleshooting
5-4 Horizontal Lines Appear
Horizontal
lines appear
Abnomal
Nomal
Check IC301 B+
(16V, -13.5V)
Check B+ line and
fusible resistance
Nomal
Check F-BOX B+
Abnomal
VD+, VD-
Abnomal
Replace R424, R425
Check IC802,IC803,
Check / Replace
HC801,FA801S,FA803S
IC301
5-4 Samsung Electronics