3-13
ONE POINT REPAIR GUIDE
11. B(BURNT) PROTECTION
11-1. Solution
Replace IC702, IC703 (AMP IC) on MAIN board.
11-2. How to troubleshoot (Countermeasure)
1) After MAIN SET power off, check Red LED blink at intervals of 0.5 sec. (B Protection)
2) Turn MAIN SET power on again.
3) Check voltage 12 V of IC702, IC703 at pin1, if 12 V has problem no power repair guide. (STEP 2-1.)
4) If 12 V is ok, IC702, IC703 (AMP IC) on MAIN bottom board.
No display or No Sound
11-3. Service hint (Any picture / Remark)
< MAIN board bottom view >
IC703
IC702
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