All Dvd Disc" Reading Error - LG BH4120SN Service Manual

2. "ALL DVD DISC" READING ERROR

- All DVD disc did not recognized, but BD and CD are recognized normally.
- If LD output current's level is abnormal, set can not recognize DVD disc.
2-1. Component
1) MD (Traverse Assembly)
2) IC701 (TPIC2050), CN703
2-2. How to troubleshoot (Countermeasure)
1) Check MD's cable's status. (Pick-up/ Sled-Spindle/ Tray Cable)
2) Check power source of IC701. (pin42 --> 12 V, pin24 --> 9.5 V, pin34 --> 5 V)
3) Check pin40 (SEL_DVD) of CN703 during DVD playback.
(pin40 = 180 mV)
2-3. Service hint (Any picture / Remark)
ONE POINT REPAIR GUIDE
4-3