Samsung NK15A SERIES Service Manual page 19

5 Troubleshooting
5-4 No Sound
Does the signal appear at
Pin 67 (Tuner sound signal) and Pin
47, 48 (PC sound) and Pin 56, 57
(SCART1 sound) and Pin 53, 54
(SCART2) Pin 50, 51 (VCR) of
IC 919 (MSP3451)?
Yes
Does the signal appear at Pin 27,
28 of IC919 (MSP3451)?
Yes
Does the signal appear
at L501 ~L504?
Yes
Replace the speaker.
NK15A*/NK17A*
Check the CN403 (PC conector) and the
No
CN402 (CN001) and the CN200 (CN002)
and the CN888 (Tuner) and the CN702_1.
No
Check the IC919 and
related circuit of IC919.
No
Check the IC501 (Audio amp) and
related circuit of IC501.
CONFIDENTIAL
5-5