Component Repair Guide; Abnormal Md Operation - LG BD550 Service Manual

1. ABNORMAL MD OPERATION

Abnormal disc reading or abnormal tray open/close.
Replace new MD and test if it is operated normally.
1-1. Component
1) Traverse assembly
2) MD junction board
3) FFC cable from main board to MD
1-2. How to troubleshoot (Countermeasure)
1) Check the connection between main board and FFC cable, confirm the connection point.
2) Check the connection of MD junction board cable.
3) If all the cable connections are normal, replace the traverse assembly.
1-3. Service hint (Any picture / Remark)
◊ After changing MD(Traverse assembly), you must perform "SA Reset".
Refer to the next chapter "How to use the SA reset function".
1-3-1. BD572 series MD
For Pick-up
< MD Top View >
1-3-2. BD592 series MD
For Motors
< MD Top View >
Caution: BD572 and BD592 have the same junction pcb.
But it can't be compatible.(The motor FFC cable type is different.)

COMPONENT REPAIR GUIDE

For Motors
For Pick-up
For Spindle Motor
For
Sled
Motor
For Motors
< MD Bottom View >
For Spindle Motor
For
Sled
Motor
For Motors
For Pick-up
< MD Bottom View >
4-2
2010
For Pick-up For Loading
Motor & Tray
SW
For Loading
Motor & Tray
SW