Samsung CSM2077DVX Service Manual page 31

5-7 Horizotal Line
5-8 No Picture (Sound OK)
1 Check the Brightness, Contrast and Color adjustments
2. Check: AV Picture
3. See Video Block Diagram
5-9 No Sound (Picture OK)
1. Check the Volume adjustment level.
2. Check AV Video
3. See Audio Block Diagram
Samsung Electronics
IC301(LA7845)#1,
#6 Pin 16.5V,-13.5
Output?
Yes
Check IC301
No
Check/Replace Speaker
#2 Vertical wave
output?
Yes
D301,DZ302
No
DZ303,DZ304,DZ305
DZ306 check?
Yes
Replace IC301(LA7845)
No
Check/Replace
R425,R424,
D401,D402
IC301 #2 vertial
wave input check
Replace
Troubleshooting
5-5