Samsung LW29A13W Service Manual page 19

5 Troubleshooting
5-7 LW40A13W (Digital Sound - coaxial optical)
Does the Low signal at
Pin 16 of IC13?
Yes
Does the Low signal at
Pin 17 of IC13?
Yes
Does the Digital signal at Pin 41
(coaxial), 43 (optical) IC15?
Yes
Does the Digital signal at
Pin 11, 12, 13 of IC15?
Yes
Check IC14.
5-6
No
Check Pin 1 of CN624.
No
Replace IC13.
No
Check the CN627.
No
Check IC15 and related IC15.
CONFIDENTIAL
LW29A13W/LW40A13W