3-7
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.
4-2. CRYSTAL (X500)
4-2-1. Solution
Replace X500 on MAIN board.
4-2-2. How to troubleshoot (Countermeasure)
1) If 3.3 VA & 1.2 VA is normal, check reset ‘High’ of IC500 pin T12 on MAIN board.
2) If MAIN_RESET is high, check the soldering status of 24 MHz crystal (X500).
3) If the crystal (X500) doesn’t oscillate, check R574, C544, C547 around crystal (X500).
If there’s no defective component, then replace X500.
4-2-3. Service hint (Any picture/ Remark)
XXI
XO
X500
< Signal waveform >
< MAIN board top view >
X500
X500
IC500
IC500
Summary of Contents for CM5660
Page 13: ...2 2 ...
Page 15: ......
Page 17: ...2 8 A60 3 SPEAKER SECTION ...
Page 51: ...3 34 2 SDRAM IC504 Fig 2 SDRAM 7 6 8 5 8 6 7 5 ...
Page 61: ...3 65 3 66 2 MAIN P C BOARD TOP VIEW BOTTOM VIEW ...
Page 62: ...3 67 3 68 3 FRONT P C BOARD TOP VIEW BOTTOM VIEW ...
Page 63: ...3 69 3 70 4 JACK P C BOARD TOP VIEW BOTTOM VIEW ...