LG PS-N550WPR Service Manual page 22

Major components Disassemble
Assemble and Repair instruction
How to replace gas & dust sensor, HVB assembly,
micro switch and cover terminal
1. After disassembling the door assembly, remove the filter.
Loosen the screws of 6 positions
When removing the front case assembly, disconnect the
connectors on positions.
2. Remove the front case assembly.
Replace the necessary parts.
HVB Assembly
Smell sensor
Cover Terminal
-22-
Micro Switch
Dust sensor