Disassembly Procedure For Circuit Board Removal - LG 50PV450 Manual

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, 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: P218, P210 and Ribbon Cables P102 and 213. Disconnect the following connectors: P218 P210 and Ribbon Cables P102 and 213
Remove the 9 screws holding the Y-SUS in place. Do not run the set with P213 or P121/P221 removed.
Remove the Y-SUS board by lifting up slightly and the carefully unseating connectors P214, P215, P217
and P218 by sliding the Y-SUS to the right while gently prying the connectors apart. When replacing, be
sure to readjust the Va/Vs voltages in accordance with the Panel Label. Confirm VSC, -Vy and Z-bias as
well. ll
Y-Drive Boards Removal
Disconnect the following Flexible Ribbon Connectors P101~P104 and/or P201~P204:
Disconnect the following Connectors P213 and P121/P221 by pressing in on the locking Disconnect the following Connectors P213 and P121/P221 by pressing in on the locking
mechanism and lifting upward. Do not run the set with these connectors removed.
Remove the 3 screws holding either of the Y-Drive Boards in place. Lift up slightly, then slide
to the left while gently prying the connectors apart. 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
Note: The Y-SUS does not come with the connectors
between the Y-SUS and Y-Drive
32
between the Y-SUS and Y-Drive
May 201 1 50PV450
Board Standoff
Collar
Plasma