LG LMV1762SB, Service Manual

Page: 23 / 48

5
-23-
Turns on automatically
1 Repeat door open and close
at least three times.
Does the product operate?
Does the product turn on
automatically without pushing
the start key?
Yes
No
Yes
Alternate
explanation
(refer to the
Note on p. 19)
3 When the door is closed,
does the oven lamp turn on?
Yes
No
Replace the
turntable motor.
2 Is there any beeping sound
in the continuity test between
the ends of the latch board?
- Secondary switch
(Door should be closed.)
Yes
No Adjust latch
board
(refer to section
9-1, 9-2)
Power ON
4 When the door is opened, Is
the voltage of the door
sensing part over 4 V?
(Pin 11 to Pin 12)
Yes
No Replace the PCB
(EBR75341201)
4 Is there any beeping sound
in the continuity test between
the ends of the two pins of
RY1 ?
No
Yes
Is the voltage of both ends
of the D37 over 8 V?
Yes
No
Replace the PCB
(EBR75341201)
PCB No Problem
Replace the PCB
(EBR75341201)