SOI 03.06 FV
15/38
599 36 78-45
FUNCTION OF IMPORTANT COMPONENTS
DOOR OPEN MECHANISM
The door can be opened by pushing the door open button.
MONITORED LATCH SWITCH (SW1)
1. When the oven door is closed, the contacts
(COM - NO) must be closed.
2. When the oven door is opened, the contacts
(COM - NO) must be opened.
MONITOR SWITCH (SW2)
1. When the oven door is closed, the contacts
(COM - NC) must be opened.
2. When the oven door is opened, the contacts
(COM - NC) must be closed.
3. If the oven door is opened and the contacts
(COM - NO) of the monitored latch switch
(SW1) fail to open, fuse F8A blows
simultaneously with closing the contacts
(COM - NC) of the monitor switch (SW2).
STOP SWITCH (SW3)
1. When the oven door is closed, the contacts
(COM - NO)must be closed.
Figure D-1. Door Open Mechanism
2. When the oven door is opened, the contacts (COM - NO) must be opened.
CAUTION: BEFORE REPLACING A BLOWN FUSE (F1 AND F2) TEST THE MONITORED LATCH SWITCH
(SW1) AND MONITOR SWITCH (SW2) FOR PROPER OPERATION.
(REFER TO CHAPTER "TEST PROCEDURE".)
SPECIAL FUSE F1 20A
If the wire harness or electrical components are short-circuited, this fuse F1 blows to prevent an shock or fire
hazard.
FUSE F2
1. The fuse F2 also blows when the H.V. rectifier, H.V. wire harness, H.V. capacitor, magnetron or
secondary
winding of power transformer is shorted.
2. If the wire harness or electrical components are short-circuited, the fuse F2 blows to prevent an electric
shock or fire hazard.
THERMAL CUT-OUT 145
°
C TC01 (OVEN)
The thermal cut-out located on the top of the oven cavity is designed to prevent damage to the oven if the foods in
the oven catch fire due to over heating produced by improper setting of cook time or failure of control unit. Under
normal operation, the oven thermal cut-out remains closed. However, when abnormally high temperatures are
reached within the oven cavity, the oven thermal cut-out will open at 145°C, causing the oven to shut down.
The
defective thermal cut-out must be replaced with a new one
.
THERMAL CUT-OUT 125
°
C
TC02 (MG)
This thermal cut-out protects the magnetron against overheat. If the temperature goes up higher than 125
°C
because the fan motor is interrupted or the ventilation openings are blocked, the thermal cut-out TC02 will open
and line voltage to the high voltage transformer T will cut off and operation of the magnetron MG will be stopped.
The defective thermal cut-out must be replaced with a new one.
TURNTABLE MOTOR
The turntable motor drives the turntable roller assembly to rotate the turntable.
DOOR
LATCH HOOK
STOP
SWITCH
SW3
MONITOR
SWITCH (SW2)
MONITORED
LATCH
SWITCH (SW1)
DOOR OPEN BUTTON
LATCH
HEADS
OPEN LEVER
