Sharp LC-24LE240E Service Manual page 60

LC-24LE240
7. No Sound Problem
Problem: No audio at main TV speaker outputs.
Check supply voltages of VDD_AUDIO, 5V_VCC and 3V3_VCC with a voltage-meter. There may
be a problem in headphone connector or headphone detect circuit (when headphone is connected,
speakers are automatically muted). Measure voltage at HP_DETECT pin, it should be 3.3V.
8. No Sound Problem at Headphone
Problem: No audio at headphone output.
Check HP detect pin, when headphone is connected. Check 5V_VCC and 3V3_VCC with a voltage
meter.
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