Samsung LA40F71BX Service Manual page 38

Tft-lcd tv
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4-2-7 No Sound
Picture is display, no sound.
Yes
Does the signal appear at
Pin #10, #16(CH1_L, R Sound)
6
and Pin #3, #9
(CH2_L, R Sound)
of IC111?
Yes
Check the DC 12V
of IC111?
Yes
7
Does the signal appear at
L107, L108, L112, L113?
Yes
Replace the speaker ass'y?
No
Connect a sound cable.
control a volume.
No
Check a connection harness and
headphone jack / Side AV.
No
Check a IC111.
Change a main PCB ass'y.
No
Change a main PCB ass'y.
4 Troubleshooting
4-13

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