LG LMHM2017SW Service Manual page 21

Power Off
5 Is there any beep sound
in continuity test between
the ends of latch board?
- primary switch
(Door should be closed.)
Yes
6 Is the connector connected
to High voltage Transformer
assembly disconnected or
disassembled?
No
Adjust latch
No
board
(Refer to 9-1,
9-2)
Reconnect or
Yes
repair the
connector
-21-
7 Is the resistance of high
voltage Transformer out of
rage?
Test Point
1. Primary winding (High, Low): 0.2 ~ 0.5 Ohm
2.Secondary: 50~120 Ohm
Case (ground) Case (ground) Case (ground)
Case (ground) Case (ground) Case (ground) Case (ground) Case (ground) Case (ground)
Case (ground) Case (ground) Case (ground) Case (ground) Case (ground) Case (ground)
Case (ground) Case (ground) Case (ground) Case (ground)
Case (ground) Case (ground) Case (ground)
3.Filament winding: 0 Ohm
No
Replace the
Yes
High Voltage
Transformer