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ONE POINT REPAIR GUIDE
9. SPEAKER NO AUDIO
Speaker No Audio
9-1. AMP IC
9-1-1. Solution
Please check and replace IC700 ~ IC705 on MAIN board.
9-1-2. How to troubleshoot (Countermeasure)
1) Check supply voltage of AMP(CN110) & PWM signal
Normal Supply voltage and signal Check AMP IC.
Poor supply voltage Check SMPS Assy.
Poor signal Check PWM IC.
2) Check CSD of FET driver IC (IRS2092 : EAN60778301).
CSD has about 5 V on normal state.
When AMP has problem, CSD is LOW state or keep change LOW to HIGH.
9-1-3. Service hint (Any picture / Remark)
CN 110 P IN1, 2 : - 66 V
PIN3, 4 : PGND
PIN5, 6 : +66 V
# 5 P I N o f I C → CSD
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