3-8
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.
4-3. SERIAL FLASH (IC501)
4-3-1. Solution
Please check and replace IC501 on MAIN board.
4-3-2. How to troubleshoot (Countermeasure)
1) If the crystal (X500) does oscillate, check serial flash (IC501) on MAIN board.
Check pin8 (VCC), pin6 (CLK), pin1 (CS), pin2 (DO), pin5 (DI) of below waveform.
2) If pin1, 2, 5, 6 doesn’t come out, check registers (R595, R596, R570, R571, R572, R569) of IC501.
If registers of IC500 is OK, then replace IC500. (it need to download program.)
3) After change IC500, if It is still not below waveform, check IC500 (DSP IC).
4-3-3. Service hint (Any picture/ Remark)
V
VCC
CLK
DO
CS#
< Signal waveform >
< MAIN board top view >
IC501
IC501
Содержание CM5660
Страница 13: ...2 2 ...
Страница 15: ......
Страница 17: ...2 8 A60 3 SPEAKER SECTION ...
Страница 51: ...3 34 2 SDRAM IC504 Fig 2 SDRAM 7 6 8 5 8 6 7 5 ...
Страница 52: ...3 35 3 SERVO IC401 X XI XO Fig 3 2 CD 16M IC401 pin31 Fig 3 1 X400 Crystal 16 9344 MHz 10 9 11 10 9 11 ...
Страница 61: ...3 65 3 66 2 MAIN P C BOARD TOP VIEW BOTTOM VIEW ...
Страница 62: ...3 67 3 68 3 FRONT P C BOARD TOP VIEW BOTTOM VIEW ...
Страница 63: ...3 69 3 70 4 JACK P C BOARD TOP VIEW BOTTOM VIEW ...