3-6
ONE POINT REPAIR GUIDE
4. NO OPERATION OF MD
When no sound output in the CD function, you can not listen to music reading data from a CD disc
if the servo motors in MD don’t work. This step is for checking the SPINDLE MOTOR among them.
4-1. SPINDLE MOTOR
4-1-1. Solution
Please check and replace IC800, IC801 on MAIN board.
4-1-2. How to troubleshoot (Countermeasure)
1) Check the CLVOUT signal from pin16 of IC800.
If no signal, check 3.3 V (pin63 RF) and X800.
2) Check the SPIN- & SPIN+ from IC801 to PN801 for driving SPINDLE motor. It is about 3.6 Vp-p.
If no signal, check +5 V for IC800.
3) Check if the cable is solidly connected between PN801 and MD.
4) Check the MD.
If the spindle motor is sort-circuit or has any trouble, it can not rotate CD discs.
Please check the function after changing another MD.
4-1-3. Service hint (Any picture/ Remark)
About 3.6 Vp-p
< Waveform of SP- & SP+
for driving SPINDLE motor >
< Signal check point >
SP+
SP+
pin17 to IC801
pin17 to IC801
SP-
SP-
pin18 to IC801
pin18 to IC801
IC801
IC801
Summary of Contents for CM2460
Page 11: ...1 10 ...
Page 13: ...2 2 ...
Page 15: ......
Page 17: ...3 SPEAKER SECTION A60R A60L ...
Page 46: ...3 29 13 14 4 USB USB_5V D D Figure 4 14 13 ...
Page 47: ...3 30 ...
Page 54: ...3 58 3 57 SMPS P C BOARD BOTTOM VIEW ...
Page 55: ...3 60 3 59 2 MAIN P C BOARD TOP VIEW ...
Page 56: ...3 62 3 61 MAIN P C BOARD BOTTOM VIEW ...
Page 57: ...3 64 3 63 3 DISPLAY P C BOARD TOP VIEW ...
Page 58: ...3 66 3 65 DISPLAY P C BOARD BOTTOM VIEW ...
Page 59: ...3 68 3 67 4 KEY P C BOARD TOP VIEW BOTTOM VIEW ...
Page 60: ...3 70 3 69 ...