LG 50PQ30 Training Manual page 21

Disassembly Procedure for Circuit Board Removal
Disassembly Procedure for Circuit Board Removal
Notes: 1) All Plugs listed are from left to right Pin 1,2, 3, ETC.
2) Remember to be cautious of ESD as some semiconductors are CMOS and prone to static failure.
Switch Mode Power Supply Board Removal
Disconnect the following connectors: P811, P813, SC101.
Remove the 8 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: P201, P206, P101, P202.
Remove the 8 screws holding the Y-SUS in place.
Remove the Y-SUS by lifting slightly to clear standoff and slid it to the right.
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~P103 and/or P201~P203.
Disconnect the following connectors: P209 and/or P108.
Remove the 3 screws holding either of the Y-Drive boards in place.
Remove the Y-Drive by lifting slightly and sliding the board to the left unseating P106,
P107, P109 and/or P205, P206 and P208 from the Y-SUS Board.
Note: Y, 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.
After replacing the Y-Drive,
check the connectors for solder break.
After replacing the Y-Drive,
check the connectors for solder breaks.
21 November 2009 50PQ30 Plasma
Board Standoff
Collar