Samsung LN32B550K1F Service Manual page 190

4. Troubleshooting
4-1-9. No Sound
Symptom Video is normal but there is no sound..
-
When the speaker connectors are disconnected or damaged.
-
Major
When the sound processing part of the Main Board is not functioning.
-
checkpoints
Speaker defect..
-
Diagnostics
6
7
Caution Make sure to disconnect the power before working on the IP board.
4-22
Check the source and
check the connection of sound cable
(Comp/PC/DVI to HDMI).
Yes
Does the sound data appear at
TP - V2SR, V2SL (AV2 R/L)
R745, R744 (Comp1, AV1 R/L)
R712, R713 (Comp2 R/L)
R749, R748 (DVI R/L)
R741, R740 (PC R/L)?
Yes
Does the DC B3.3V, B12V
appear at C133, C112?
Yes
Does the I2C data appear at R416?
Yes
Does the sound data appear at
C180, C177 (R +/-)
C179, C176 (L +/-)?
Yes
Replace speaker
BN96-09463A
No
Input the sound source properly.
Check CN701 or CN805
Change the Main Assy
550 32" : BN94-02518A
550 37" : BN94-02518B
550 40" : BN94-02518A
No
550 46" : BN94-02518D
550 52" : BN94-02518E
540 40" : BN94-02510A
540 46" : BN94-02510B
540 52" : BN94-02510C
Change the Main Assy
550 32" : BN94-02518A
550 37" : BN94-02518B
No
550 40" : BN94-02518A
550 46" : BN94-02518D
550 52" : BN94-02518E
540 40" : BN94-02510A
540 46" : BN94-02510B
540 52" : BN94-02510C
Check IC103 (Audio CODEC)
Change the Main Assy
550 32" : BN94-02518A
550 37" : BN94-02518B
No
550 40" : BN94-02518A
550 46" : BN94-02518D
550 52" : BN94-02518E
540 40" : BN94-02510A
540 46" : BN94-02510B
540 52" : BN94-02510C
Check IC201 (Saturn4)
Check IC103 (Sound AMP)
Change the Main Assy
No
550 32" : BN94-02518A
550 37" : BN94-02518B
550 40" : BN94-02518A
550 46" : BN94-02518D
550 52" : BN94-02518E
540 40" : BN94-02510A
540 46" : BN94-02510B
540 52" : BN94-02510C
No
Please, Contact Tech support