3-6
ONE POINT REPAIR GUIDE
2. SPEAKER NO SOUND
No Sound when you TURN ON the unit.
2-1. Digital AMP (IC13)
2-1-1. Solution
Replace IC13 on MAIN board.
2-1-2. How to troubleshoot (Countermeasure)
1) Please check 3.3 V of IC13 pin13.
If 3.3 V voltage doesn’t come out, replace IC9.
2) Please check 22 V of IC13 pin2, 3, 34, 35.
If 22.0 V voltage doesn’t come out, replace SMPS Circuit.
3) Please check 3.3 V of IC13 pin14, 19, 25.
If 3.3 V voltage doesn’t come out, check IC105 pin B3, D8, D9.
4) Please check I2S signal of IC13 pin15, 20, 21, 22 and replace it.
2-1-3. Service hint (Any picture/ Remark)
< MAIN circuit >
< MAIN board top view >
IC13
IC13
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