3-6
ONE POINT REPAIR GUIDE
4. NO BOOTING IN CD/USB FUNCTION
After you turn on power key and displayed message in the following order
(HELLO --> VOL XX --> CD or USB) on VFD,
it will not display other message on VFD, and it will not boot-up normally.
4-1. NO VCC33, VCC12
4-1-1. Solution
Please check and replace IC505, IC509 on MAIN board.
4-1-2. How to troubleshoot (Countermeasure)
1) Check Voltage of IC505 pin2 on MAIN board.
If IC505 pin3 (about 4.9 V) & D500 Input 5.6 VA doesn’t come out, check 5.6 VA from SMPS board.
2) If IC505 pin3 (about 4.9 V) is normal, check the PWR_CTRL (IC505 pin12) is high (about 3.3 V).
If PWR_CTRL isn’t high, check pin63 of IC101 & R179, R59E.
3) If PWR_CTRL is high, check R59D, R59B, R59C and if there’s no defective component then replace IC505.
4) If 3.3 V (VCC33) is normal, check output (pin2, 4) voltage of IC509.
If 1.2 V of IC509 pin2, 4 doesn’t come out, then replace IC509.
4-1-3. Service hint (Any picture / Remark)
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< MAIN board top view >
Содержание CM9530
Страница 11: ...MEMO 1 10 ...
Страница 13: ...MEMO 2 2 ...
Страница 17: ...A60 A61A 651 652 653 653 4 SPEAKER SECTION 4 1 FRONT SPEAKER NS9530F ...
Страница 18: ...A91A 951 952 953 953 A90L 4 2 SUBWOOFER SPEAKER NS9530W LEFT SUBWOOFER ...
Страница 19: ...2 10 A91A 951 952 953 953 A90R SUBWOOFER SPEAKER NS9530W RIGHT SUBWOOFER ...
Страница 78: ...3 79 3 80 PRINTED CIRCUIT BOARD DIAGRAMS 1 SMPS P C BOARD TOP VIEW ...
Страница 80: ...3 83 3 84 2 MAIN P C BOARD TOP VIEW ...
Страница 81: ...3 85 3 86 MAIN P C BOARD BOTTOM VIEW ...
Страница 82: ...3 87 3 88 3 VOLUME P C BOARD TOP VIEW ...
Страница 83: ...3 89 3 90 VOLUME P C BOARD BOTTOM VIEW ...
Страница 84: ...3 91 3 92 4 VFD P C BOARD TOP VIEW BOTTOM VIEW ...
Страница 85: ...3 93 3 94 5 MIC P C BOARD TOP VIEW BOTTOM VIEW 6 PORTABLE P C BOARD TOP VIEW BOTTOM VIEW ...