Description And Function Of-Components; Primary And Secondary Interlock Switches (Upper And Lower Latch Switches); Sheath Heater; Variable Cooking Control - Sharp R-8200E Service Manual

DESCRIPTION AND FUNCTION OF COMPONENTS
PRIMARY AND SECONDARY INTERLOCK SWITCHES
(UPPER AND LOWER LATCH SWITCHES)
The primary interlock switch (upper latch switch) is
mounted in the upper latch hook and the secondary
interlock switch (lower latch switch) is mounted in the
lower latch hook. They are activated by the latch on the
door.
When the door is opened, the switch interrupt the circuit to
all components except the oven light and fan motor. A
cook cycle cannot take place until the door is firmly closed
thereby activating both switches.
The sheath heater is provided for browning the food. In
order to give browning to the various foods speedily and
efficiently, the heater position can be adjusted by moving
the browner position control knob.
Upper
Latch
Hook
Lever -
Assembly
SHEATH HEATER
VARIABLE COOKING CONTROL
The variable cooking control consists of the vari-motor,
vari-switch, gear, select lever bracket assembly, etc.
The purpose of the vari-motor is provided to rotate a cam
which is going to turn the vari-switch on and off within a 30
seconds time base.
The vari-switch is operated by the cam lever and cam which
is provided on the vari-motor shaft. If the variable cooking
mode selector is set at DEFROST, SIMMER or ROAST
position. 220/240 volts A.C. is supplied to the power
transformer intermittently within a 30 seconds time base. A
half (l/2) of full power would be 15 seconds of the switch
on and 15 seconds of off time.
The following chart shows the vari-switch operation in the
various modes.
La1
Primary
interlock
\
Upper
Latch
Hook
Wire
Holder
Figure 2. Latch Assembly