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Only for training and service purposes
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MAIN ELECTRICAL TROUBLESHOOTING GUIDE
Is IC(U603) OK?
No turn on Red LED
Is 8.4V of J602_Pin3 OK?
YES
Replace IC(U603).
NO
Is L601 OK?
Replace L601.
YES
NO
Is IC(U601) OK?
Replace IC(U601).
YES
NO
Is L602 OK?
Replace L602.
YES
NO
NO
4. CHARGING CIRCUIT