LG 42PQ30 Training Manual page 20

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 PWB in place
Remove the PWB
When replacing, be sure to readjust the Va/Vs voltages in accordance with the Panel Label.
Confirm VSC, -Vy and ZBias as well.
Y-SUS Board Removal
Disconnect the following connectors: P201, P206, P101, P202
Remove the 7 screws holding the PWB in place
Remove the PWB by lifting slightly and sliding it to the right.
When replacing, be sure to readjust the Va/Vs voltages in accordance with the Panel Label.
Confirm VSC, -Vy and Zbias as well.
Y Drive Board Removal
Disconnect the following Flexible Ribbon Connectors: P1, P2, P3, P4, P5, P6, P7 and P8
Disconnect the following connectors: P201, P801, P101, P202
Remove the 3 screws holding the PWB in place
Remove the PWB by lifting slightly and sliding the PWB to the left unseating P204 and P200
from the Y-SUS PWB.
Note: PWB stand-offs have a small collar. The board must be lifted slightly to clear these collars.
Preliminary Information 42PQ30
20