Samsung UA42EH5000R Service Manual page 53

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
7
Make sure to disconnect the power before working on the IP Board.
Caution
Check the source and check the
connection of sound cable?
(Comp/PC/DVI to HDMI)
Yes
Check the Self Diagnosis (Support ⇢
Self Diagnosis ⇢ Picture Test) Dose the
promblem still exist self diagnosis?
Yes
Does the sound data appear at?
R403/R405 (AV1, COMP1)
R428_PC/R429_PC(PC/DVI)
Yes
Does the DC B12_18VS appear at?
BD217_L/BD211_S?
Yes
Does the sound data appear at?
- L-, L+, R-, R+
Yes
Replace speaker.
No Input the sound source properly.
Check external devices and
No
connections.
Check CN403, CN402_PC.
No
Change the Main Ass'y.
No Change the Main Ass'y.
Check IC1001.
No Check IC301 (Sound AMP).
Change the Main Ass'y.
No Please, Contact Tech support.
4. Troubleshooting
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