3-6
ONE POINT REPAIR GUIDE
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.
3-2. CRYSTAL (X500)
3-2-1. Solution
Replace X500 on MAIN board.
3-2-2. How to troubleshoot (Countermeasure)
1) If 3.3 V & 1.2 V is normal, check reset ‘HIGH’ of IC501 pin T12 on MAIN board.
If MAIN_RESET isn’t HIGH, check MICOM(IC100) pin40.
2) If MAIN_RESET is HIGH, check the soldering status of 24 MHz crystal(X500).
3) If the crystal(X500) doesn’t oscillate, check R551, R55E, C536, C53B around crystal(X500)
If there’s no defective component, then replace X500.
3-2-3. Service hint (Any picture/ Remark)
X
X
XII
X
XO
O
X500
< Signal waveform >
< MAIN board top view >
IC501
IC501
X500
X500
Содержание CJ87
Страница 17: ...1 16 ...
Страница 19: ...2 2 ...
Страница 21: ...2 6 2 5 ...
Страница 23: ...2 8 A60 3 SPEAKER SECTION FRONT SPEAKER ...
Страница 65: ...3 36 3 SERVO IC401 X XI XO Fig 3 2 CD 16M IC401 pin31 Fig 3 1 Crystal 16 9344 MHz X400 11 10 12 10 11 12 ...
Страница 69: ...3 40 ...
Страница 73: ...3 47 3 48 PRINTED CIRCUIT BOARD DIAGRAMS 1 SMPS P C BOARD DIAGRAM TOP VIEW ...
Страница 75: ...3 51 3 52 2 MAIN P C BOARD DIAGRAM TOP VIEW ...
Страница 76: ...3 53 3 54 MAIN P C BOARD DIAGRAM BOTTOM VIEW ...
Страница 77: ...3 55 3 56 3 FRONT P C BOARD DIAGRAM TOP VIEW ...
Страница 78: ...3 57 3 58 FRONT P C BOARD DIAGRAM BOTTOM VIEW ...
Страница 79: ...3 59 3 60 4 JACK P C BOARD DIAGRAM TOP VIEW BOTTOM VIEW ...