Description And Function Of Components - LG MH-1355M Service Manual

DESCRIPTION AND FUNCTION OF COMPONENTS

OVEN LAMP
The oven lamp illuminates the interior of the oven
during cooking so that food can be seen without
opening the door.
The oven lamp will turn off when the cooking time is
ended.
TURNTABLE MOTOR
The turntable motor rotates the turntable located on
the bottom of the oven cavity during the cooking
operation to cook the foods evenly.
Turntable will rotate in either direction.
OVEN THERMOSTAT
The oven thermostat located on the insulator-T, is
designed to prevent damage to the components and
acts when heater overheats to abnormally high tem-
peratures. Under normal convection operation, the
heater thermostat remains closed. However, when
abnormal condition within the convection chamber
approaches a critical level (130°C), the oven ther-
mostat will open and interrupt the circuit to the oven,
causing it to shut down.
MAGNETRON THERMOSTAT
The magnetron thermostat located on the magnetron,
is designed to prevent damage to the magnetron if an
overheated condition develops in the tube due to
abnormal state.
The magnetron thermostat remains closed under nor-
mal operation, but the magnetron thermostat opens
when abnormal high temperatures within the magne-
tron approach a critical level (145°C), causing oven to
shut down.
DOOR OPENING MECHANISM
The door can be opened by pushing button and lifting
the latch as a result of action by the latch spring, latch
and latch board jaw. The latch is released from the
latch board and the door can be opened.
PRIMARY AND SECONDARY INTERLOCK
SWITCHES (FIG. 11)
The primary interlock switch is mounted in the latch
board-U and secondary interlock switch is mounted in
the latch board-L.
When the door is closed, the switches are activated by
the latch on the door. When the door is opened, the
switches interrupt the circuit to all components except
the oven lamp.
MONITOR SWITCH (FIG. 11)
The monitor switch, mounted on the latch board-L with
the oven lamp switch, is activated by a latch on the
door while the door is closed.
If the door is opened and the primary and secondary
interlock switch contacts fail to open, this switch is
intended to render the oven inoperative by means of
fuse failure, simultaneously with the closing of monitor
switch contacts.
OVEN LAMP SWITCH (FIG. 11)
The oven lamp switch mounted on the latch board-L
with monitor switch, is activated by latch on the door
while the door is closed.
– 20 –
PRIMARY SWITCH
OVEN LAMP
SWITCH
MONITOR
SWITCH
SECONDARY
SWITCH
Fig. 11