Samsung LA32C550J1R, Service Manual

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4-11
4. Troubleshooting
4-1-6. No Sound
Symptom Video is normal but there is no sound..
-
Major
checkpoints
When the speaker connectors are disconnected or damaged.
-
When the sound processing part of the Main Board is not functioning.
-
Speaker defect.
-
Diagnostics
1
2
No
Check a connection harness and
headphone jack./Side AV.
Check Sound Processor IC1102(SX1).
No
Picture is display, no sound.
Change a DRXK IC IC801.
Change a main PCB ass’y.
No
Does the signal appear at
R832, R833, R834 (I2S_LRCLK,
_I2S_BCLK, _I2S_DATA) of IC801?
Check the B 3.3V, B 1.2V of IC801?
Change a DRXK IC IC1401.
Change a main PCB ass’y.
No
Does the signal appear at
L1465_FL1466_F,L2002 near IC1401?
Replace the speaker ass’y?
Yes
Connect a sound cable.
control a volume.
Yes
1
Yes
2
Yes
1
Caution Make sure to disconnect the power before working on the IP board.