Samsung PT4298HDX/SMS Service Manual page 54

Troubleshooting
5-2 No Sound
Check the input/output
circuits of IC601
Nomal
Check ICD603
Nomal
Check IC602
Nomal
Check IC605
Nomal
Check various input circuits
5-2
Check the output
Abnomal
volume level of
MAIN CN601
Abnomal
Check the circuits
related to IC601
Abnomal
Check the circuits
related to IC601
Abnomal
Check the circuits
related to IC602
Abnomal
Check the circuits
related to IC605
Nomal
Check SPEAKER
Samsung Electronics