3-11
ONE POINT REPAIR GUIDE
5. NO OPERATION OF MD (DRIVING THE SERVO MOTORS)
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.
5-1. SPINDLE MOTOR
5-1-1. Solution
Please check and replace IC407, IC408 on MAIN board.
5-1-2. How to troubleshoot (Countermeasure)
1) Check the SPDO signal from Pin16 of IC407.
If no signal, check 3.3 V(RF) and X400.
2) Check the SP- & SP+ from IC408 to CN405 for driving SPINDLE motor. It is about 3.6 Vp-p.
If no signal, check +1.8 V and +5 V for IC408.
3) Check if the FFC cable is solidly connected between CN405 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.
5-1-3. Service hint (Any picture / Remark)
pj[W_
zwR
zwT
zwR
w]GGju[W\
zwT
_GGju[W\
< Waveform of SP- & SP+
for driving SPINDLE motor >
< Signal check point >
Содержание CM8440
Страница 15: ...MEMO 2 2 ...
Страница 19: ...A60L 4 SPEAKER SECTION 4 1 FRONT SPEAKER CMS8440F LEFT SPEAKER ...
Страница 20: ...A60R FRONT SPEAKER CMS8440F RIGHT SPEAKER ...
Страница 21: ...A90 4 2 SUBWOOFER SPEAKER CMS8440W ...
Страница 73: ...3 65 3 66 PRINTED CIRCUIT BOARD DIAGRAMS 1 SMPS P C BOARD TOP VIEW ...
Страница 74: ...3 67 3 68 SMPS P C BOARD BOTTOM VIEW ...
Страница 75: ...3 69 3 70 2 MAIN P C BOARD TOP VIEW ...
Страница 76: ...3 71 3 72 MAIN P C BOARD BOTTOM VIEW ...
Страница 77: ...3 73 3 74 3 FRONT VOLUME P C BOARD ...
Страница 78: ...3 75 3 76 4 MIC PORTABLE P C BOARD MEMO ...
Страница 79: ...3 77 3 78 MEMO MEMO ...