LG MD-2642KT, Service Manual

Page: 17 / 43

5-7
F. HIGH VOLTAGE TRANSFORMER
REMOVAL
1) Discharge the high voltage capacitor.
2) Disconnect the leadwire from magnetron, high voltage
transformer, and capacitor.
3) Remove the screw holding the high voltage
transformer to the baseplate.
G. FAN MOTOR ASSEMBLY REMOVAL
1) Discharge the high voltage capacitor.
2) Disconnect the leadwire from fan motor and high
voltage capacitor.
3) Remove the two screws holding the the suction guide
ASSEMBLY to the oven cavity.
4) Remove the two screws holding the fan motor
ASSEMBLY to the suction guide ASSEMBLY.
H. HIGH VOLTAGE CAPACITOR AND
DIODE REMOVAL
1) Discharge the high voltage capacitor.
2) Disconnect the leadwire from fan motor and high
voltage capacitor.
3) Remove the screw holding the suction guide
ASSEMBLY to the oven cavity.
4) Remove the screw holding the high voltage capacitor
bracket and remove the high voltage diode earth
screw.
I. INTERLOCK SYSTEM
1) INTERLOCK MECHANISM
The door lock mechanism is a device which has
been specially designed to eliminate completely
microwave activity when the door is opened during
cooking and thus to prevent the danger resulting
from the microwave leakage.
2) MOUNTING OF THE PRIMARY/MONITOR/
SECONDARY SWITCHES TO THE LATCH
BOARD
3) INSTALLATION AND ADJUSTMENT OF THE
LATCH BOARD TO THE OVEN ASSEMBLY
• Mount the latch board to the oven assembly.
• Adjust the latch board in the arrow direction so that
oven door will not have any play in it when the door
is closed.
• Tighten the mounting screw.
• Check for play in the door by pushing the door
release button. Door movement should be less
than 0.5 mm. (1/64 inch)
Don't push the door release button while making this
adjustment. Make sure that the latch moves smoothly
after adjustment is completed and that the screws
are tight. Make sure the primary, monitor, and
secondary switches operate properly by following the
continuity test procedure.
H.V.
Transformer
Suction
Guide
H.V.
Capacitor
Fan Motor
Assembly
Figures 12
PRIMARY
SWITCH
SECONDARY
SWITCH
ADJUSTMENT
DIRECTION
MONITOR
SWITCH
Figures 13