LG DM5360K Service Manual page 25

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 TRAY OPEN/CLOSE MOTOR among
them.
4-3. TRAY OPEN/CLOSE MOTOR
4-3-1. Solution
Please check and replace IC105, IC801 on MAIN board.
4-3-2. How to troubleshoot (Countermeasure)
4-3-2. How to troubleshoot (Countermeasure)
1) Check MOT_OPEN & MOT_CLOSE signals from pin8, pin65 of IC800 to IC802.
- If no signal, check + 5 V to IC802.
2) Check LOAD+ & LOAD - from IC801 to CON803 for driving the tray open/close motor.
It is about 3.85 Vp-p.
- If no signal, check +5 V to IC802. If it has any trouble, replace it with a new one.
3) Check if the cable is solidly connected between CON802 and MD.
4) Check the MD.
- If the tray motor is sort-circuit or has any trouble, it can not open or close the tray.
Please check the function after changing another MD.
4-3-3. Service hint (Any picture/ Remark)
MOT_CLOSE MOT_CLOSE
pin7 to IC803 pin7 to IC803
ONE POINT REPAIR GUIDE
IC803 IC803
MOT_OPEN MOT_OPEN
pin6 to IC803 pin6 to IC803
< MAIN board top view >
LOAD+ LOAD+
pin9 to IC803 pin9 to IC803
LOAD- LOAD-
pin10 to IC803 pin10 to IC803
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