3-24
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)
j u XXWGGw puGXSYGaGT]]}
w puGZS[GaGw nuk
w puG\S]GaGR]]}
J\Gw puGGpjGTe Gjzk
Содержание CM8440
Страница 15: ...MEMO 2 2 ...
Страница 19: ...A60L 4 SPEAKER SECTION 4 1 FRONT SPEAKER CMS8440F LEFT SPEAKER ...
Страница 20: ...A60R FRONT SPEAKER CMS8440F RIGHT SPEAKER ...
Страница 21: ...A90 4 2 SUBWOOFER SPEAKER CMS8440W ...
Страница 73: ...3 65 3 66 PRINTED CIRCUIT BOARD DIAGRAMS 1 SMPS P C BOARD TOP VIEW ...
Страница 74: ...3 67 3 68 SMPS P C BOARD BOTTOM VIEW ...
Страница 75: ...3 69 3 70 2 MAIN P C BOARD TOP VIEW ...
Страница 76: ...3 71 3 72 MAIN P C BOARD BOTTOM VIEW ...
Страница 77: ...3 73 3 74 3 FRONT VOLUME P C BOARD ...
Страница 78: ...3 75 3 76 4 MIC PORTABLE P C BOARD MEMO ...
Страница 79: ...3 77 3 78 MEMO MEMO ...