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ONE POINT REPAIR GUIDE
4. NO AUDIO FROM SPEAKER
When unit is connected to speaker, no audio from speaker.
4-1. IC601 (PWM IC)
4-1-1. Solution
Replace IC601 (PWM IC).
4-1-2. How to troubleshoot (Countermeasure)
1) Check IC601 pin soldering.
2) If there is short soldering on pin IC601, re-soldering pin IC601.
3) If problem still occurs, check AMP IC (IC700, IC701, IC702).
- Check IC700, IC701, IC702 pin soldering.
- If soldering OK, check the AMP heat sink :
Replace IC700, IC701, IC702.
4-1-3. Service hint (Any picture / Remark)
< AMP heat sink view >
< MAIN board top view >
IC601 (PWM IC)
AMP IC
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