3-9
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.
4-4. SDRAM (IC502)
4-4-1. Solution
Please check and replace IC502 on MAIN board.
4-4-2. How to troubleshoot (Countermeasure)
1) Check below waveform & soldering status of SDRAM (IC502) on MAIN board.
If pin17(#CAS), pin18(#RAS), pin19($CS), pin38(CLK), pin29(address), pin2(DQ) doesn’t come out,
check damping resistor (R508, R506, R504, R507).
2) If resistor is OK, then replace IC502 (SDRAM).
3) After change IC502, if It is still not below waveform, check IC501 (DSP IC).
4-4-3. Service hint (Any picture / Remark)
} jj
y
V jz
y hz
V ~ l
jhz
< Signal check point >
< Signal waveform >
Summary of Contents for CM9530
Page 11: ...MEMO 1 10 ...
Page 13: ...MEMO 2 2 ...
Page 17: ...A60 A61A 651 652 653 653 4 SPEAKER SECTION 4 1 FRONT SPEAKER NS9530F ...
Page 18: ...A91A 951 952 953 953 A90L 4 2 SUBWOOFER SPEAKER NS9530W LEFT SUBWOOFER ...
Page 19: ...2 10 A91A 951 952 953 953 A90R SUBWOOFER SPEAKER NS9530W RIGHT SUBWOOFER ...
Page 78: ...3 79 3 80 PRINTED CIRCUIT BOARD DIAGRAMS 1 SMPS P C BOARD TOP VIEW ...
Page 80: ...3 83 3 84 2 MAIN P C BOARD TOP VIEW ...
Page 81: ...3 85 3 86 MAIN P C BOARD BOTTOM VIEW ...
Page 82: ...3 87 3 88 3 VOLUME P C BOARD TOP VIEW ...
Page 83: ...3 89 3 90 VOLUME P C BOARD BOTTOM VIEW ...
Page 84: ...3 91 3 92 4 VFD P C BOARD TOP VIEW BOTTOM VIEW ...
Page 85: ...3 93 3 94 5 MIC P C BOARD TOP VIEW BOTTOM VIEW 6 PORTABLE P C BOARD TOP VIEW BOTTOM VIEW ...