Samsung CN331EBZX/DIS Service Manual page 26

Troubleshooting
5-4 No Sound (Video OK)
5-4
Check IC201
No
Pin 15 (Sound Out)
Yes
Check IC601/IC602 Yes
Pins 1, (SOUND IN)
No
Check IC601/IC602
No
Pin 3 (B+ 10-12.5V)
Yes
No
Check IC601/IC602
Yes
Check/Replace
A/V Front assembly.
Check/Replace
IC201
Check/Replace
Q902, IC601, IC602
Check/Replace
Q601, Q602, R819
Check/Replace
IC601/IC602
Samsung Electronics