All Cd Disc" Reading Error - LG LHB535 Service Manual

COMPONENT REPAIR GUIDE
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 (LDELI_LPF) is ok, but no output (LDI_CD), check the TR SQ712, SQ717.
4-3. Service hint (Any picture / Remark)
5V_LOADEF
N×
i <r-- × aS|
-SQ715
"SR737
47O
MMBT3906LTI
C
OUTPUT
>> "_. (TO PICKoUP)
LOI_CD
'_
DGND
DGND
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4-5
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