Samsung LE19C45 Series, Service Manual

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4-22
4. Troubleshooting
4-1-9. No Sound
Symptom Video is normal but there is no sound..
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Major
checkpoints
When the speaker connectors are disconnected or damaged.
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When the sound processing part of the Main Board is not functioning.
-
Speaker defect..
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Diagnostics
Check CN802, CN901, JA701_EU.
Change the main assy.
No
Yes
Does the B13V(B13V1) appear?
No
Yes
Check the source and
check the connection of sound cable
(Comp/PC/DVI to HDMI).
Yes
Change the Main Assy
Yes
Does the sound data appear at
TP-COMP_SL_IN, COMP_SR_IN(COMP/AV)?
TP-PC_SL_IN, PC_SR_IN(PC/DVI)?
TP-SC_SL_IN, TP_SR_IN(SCART)?
Does thd I2S data appear at R1390?
No
CHECK IC1102(SETD-10).
Change the main assy.
No
Input the sound source properly.
Yes
Replace speaker.
Please, Contact Tech support.
No
Does the sound data appear
TP-SPK_L-, SPK_L+,
SPK_R-, SPK_R+?
No
Check IC1301(Sound AMP)
Change the main assy.
6
7
Caution Make sure to disconnect the power before working on the IP board.