
3-14
ONE POINT REPAIR GUIDE
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 pickup module in MD doesn’t work. This step is for checking the LASER
TRACKING ACTUATOR.
5-4. LASER TRACKING ACTUATOR
5-5-1. Solution
Please check and replace IC407, IC408 on MAIN board.
5-4-2. How to troubleshoot (Countermeasure)
The tracking actuator makes the laser beam be positioned in the center of a track on CD disc.
1) Check the TRD signal from Pin22 of IC407.
If no signal, check 3.3 V(RF) and X400.
2) Check TR- & TR+ from IC408 to CN404 for driving the tracking actuator.
If no signal, check +1.8 V and +5 V for IC408.
3) Check if the FFC cable is solidly connected between CN404 and MD.
4) Check the MD.
If the pick-up module has any trouble, it can not move the laser beam on the left or right side.
Please check the function after changing another MD.
5-4-3. Service hint (Any picture / Remark)
TR+ to CN404
TR- to CN404
CN404
TR+
Pin16 of CN404
TR-
Pin17 of CN404
< Waveform of TR±
for driving TRACKING actuator >
< Signal check point >
Содержание CM9550
Страница 15: ...2 2 ...
Страница 19: ...LED SUB LED MAIN A60L A61 A62 651 652 4 SPEAKER SECTION 4 1 FRONT SPEAKER NS9550F LEFT SPEAKER ...
Страница 20: ...LED SUB LED MAIN A60R A61 A62 651 652 FRONT SPEAKER NS9550F RIGHT SPEAKER ...
Страница 21: ...LED SUB LED MAIN A91 A90 952 952 A92 951 4 2 SUBWOOFER SPEAKER NS9550W ...
Страница 61: ...3 40 ...
Страница 81: ...3 79 3 80 3 MAIN P C BOARD TOP VIEW ...
Страница 82: ...3 81 3 82 4 MAIN P C BOARD BOTTOM VIEW ...
Страница 83: ...3 83 3 84 5 FRONT VOLUME MIC PORTABLE P C BOARD TOP VIEW ...
Страница 84: ...3 85 3 86 6 FRONT VOLUME MIC PORTABLE P C BOARD BOTTOM VIEW ...