LG 50PK950 Training Manual page 33

Disassembly Procedure for Circuit Board Removal
Disassembly Procedure for Circuit Board Removal
Note:
Remove AC Power before doing any circuit board removal procedures.
Switch Mode Power Supply Board Removal
Disconnect the following connectors: P811, P812, P813 and SC101.
Remove the 7 screws holding the SMPS in place.
Remove the board.
When replacing, be sure to readjust the Va/Vs voltages in accordance with the Panel Label.
Also, re-confirm VSC, -Vy and Z-Bias as well.
Y-SUS Board Removal
Disconnect the following connectors: P113, P114 and Ribbon Cable P101.
Remove the connectors P117 and P118 by pressing in on the locking mechanism and lifting upward.
Remove the 15 screws holding the Y-SUS in place. Do not run the set with P117 or P118 removed.
Remove the Y-SUS board. When replacing, be sure to readjust the Va/Vs voltages in accordance with the
Panel Label.
Confirm VSC, -Vy and Z-bias as well.
Y-Drive Boards Removal
Disconnect the following Flexible Ribbon Connectors P101~P104 and/or P201~P204:
Disconnect the following Connectors P109 and/or P209 by pressing in on the locking
mechanism and lifting upward. Do not run the set with these connectors removed.
Remove the 6 screws holding either of the Y-Drive Boards in place.
Lift up slightly, then slide to the left. Remove the Y-Drive Board.
Note: Y-SUS, Z-SUS and Y-Drive Boards are mounted on board stand-offs that have a small collar.
The board must be lifted slightly to clear these collars. Behind each board are Rubber pieces that act as a
cushion. They may make the board stick when removing.
Note: The Y-SUS does not come with the
connectors between the Y-SUS and Y-Drive
Note: The Y-SUS does not come with the
connectors between the Y-SUS and Y-Drive
33 October 2010
Board Standoff
Collar
50PK950 Plasma