Abnormal disc reading or abnormal tray open/close. => Replace new MD and test if it is operated normally.
Component
- Traverse assembly
- MD junction board
- FFC cable from main board to MD
- Check the connection between main board and FFC cable, confirm the connection point.
- Check the connection of MD junction board cable.
- If all the cable connections are normal, replace the traverse assembly.
After changing MD (Traverse assembly), you must perform "SA Reset". [Refer previous post here]
HB905 series MD Top & Bottom views.
ALL BD DISC READING ERROR
- All The Blu-ray disc is not operated, but DVD and CD are operated normally.
- If the LDO for APC of BD laser diode is abnormal, BD doesn't work.
- If the LD current control is abnormal, BD doesn't work.
- MD (Traverse Assembly)
- SIC707 – Adjustable LDO
Troubleshoot
- Check MD (Traverse, pick-up) first of all.
- Check input/output voltage of LDO SIC707 (12 V, 8 V).
- If output voltage is abnormal, check the periphery of SIC707 and replace it.
- Check the BD LD Control input/output. If input signal (LTHR_LPF) is ok But no output (LDI_BD), Check the TR SQ714, SQ716.
ALL DVD DISC READING ERROR
- All the DVD disc is not operated, but BD and CD are operated normally.
- If the LD current control is abnormal, DVD doesn't work.
- MD (Traverse Assembly)
- SQ712, SQ717
- Check MD (Traverse, pick-up) first of all.
- Check the DVD LD Control input / output.
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.
- MD (Traverse Assembly)
- SQ713, SQ715
- Check MD (Traverse, pick-up) first of all.
- Check the CD LD Control input / output.
ABNORMAL SERVO OPERATION
- The actuator, spindle and sled operation of pick-up are abnormal.
- After changing MD, the motors are abnormal operations.
- After changing Motor Drive IC, the motors are abnormal operations
- MD (Traverse Assembly)
- SIC706 – LM358
Check if the input/output voltage of SIC706 (Pin5 and Pin7) is 1.67 V
CLICK ON PICTURES TO MAGNIFY