All Cd Disc" Reading Error - LG LHB976 Service Manual

4. "ALL CD DISC" READING ERROR

- All the CD disc is not operated, but BD and DVD are operated normally.
- If the LD current control is abnormal, CD doesn't work.
4-1. Component
1) MD (Traverse Assembly)
2) SQ713, SQ715
4-2. How to troubleshoot (Countermeasure)
1) Check MD (Traverse, pick-up) first of all.
2) Check the CD LD Control input/output.
If input signal (LDEL1) is ok, but no output (LDI_CD), check the TR SQ713, SQ715.
4-3. Service hint (Any picture / Remark)
COMPONENT REPAIR GUIDE
INPUT
(FROM MAIN CHIP)
OUTPUT
(TO PICK-UP)
4-5
5V