No Sound - Samsung T19C301 Series Service Manual

4-2-7. No sound

Symptom Video is normal but there is no sound.
• When the speaker connectors are disconnected or damaged.
Major
checkpoints
• When the sound processing part of the Main Board is not functioning.
sound cable (Comp/PC/DVI to HDMI)?
Does the sound data appear at R426_
Diagnostics
Does the DC B13V_AMP_PW appear at
Does the sound waveform appear at L-,
1
Caution Make sure to disconnect the power before working on the Main board.
Check the source and connection of
Yes
Check the Self Diagnosis (Support →
Self Diagnosis → Picture Test).
Dose the promblem still exist self
diagnosis?
Yes
COMP/R427_COMP (AV1, COMP1)?
Yes
BD1602_AD?
Yes
L+, R-, R+.
Yes
Replace speaker.
Yes
Please, Contact tech support.
No Input the sound source properly.
Check external devices and
No
connections.
Check CN401_COMP.
No
Change the Main Assy.
No Change the Main Assy.
Check IC901 (NT13).
Check IC303 (Sound AMP).
No
Change the Main Assy.
4. Troubleshooting 4. Troubleshooting
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