Operation Data; Door Switches - Sharp R-210AM Service Manual

OPERATING SEQUENCE
OFF CONDITION
Closing the door activates all door interlock switches (moni-
tored latch switch and latch switch).
IMPORTANT
When the timer knob is at "0" the oven is in the OFF
condition.

DOOR SWITCHES

DOOR OPEN MECHANISM
LATCH HOOK
DOOR
LATCH
HEADS
DOOR OPEN BUTTON
Figure D-1. Door Open Mechanism
HIGH, MEDIUM HIGH, MEDIUM, MEDIUM
LOW, LOW COOKING
When the microwave oven is preset for variable cooking
power, the line voltage is supplied to the power transformer
intermittently within a 32-second time base through the
relay contact which is coupled with the current-limiting relay
(RY2). The following levels of microwave power are given.
SETTING
MEDIUM HIGH
MEDIUM
MEDIUM LOW
NOTE: The ON/OFF time ratio does not exactly correspond
to the percentage of microwave power, because
approx. 3 seconds are needed for heating up the
magnetron filament.
MONITORED LATCH SWITCH (SW1)
STOP SWITCH (SW3)
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)
SW1: MONITORED
1. When the oven door is closed, the contacts (COM - NC)
LATCH SWITCH
must be opened.
SW3: MONITOR
2. When the oven door is opened, the contacts (COM -
SWITCH
NC) must be closed.
3. If the oven door is opened and the contacts (COM - NO)
SW2: LATCH
of the monitored latch switch (SW1) fail to open, the fuse
SWITCH
F8A blows simultaneously with closing the contacts
(COM - NC) of the monitor switch (SW2).
CAUTION: BEFORE REPLACING A BLOWN FUSE (F)
OPEN LEVER
210AM - 4
26 sec. ON
Approx. 100% = 800 Watts
HIGH
20 sec. ON
6 sec. OFF
Approx. 70% = 560 Watts
14 sec. ON 12 sec. OFF
Approx. 50% = 400 Watts
8 sec. ON 18 sec. OFF
Approx. 30% = 240 Watts
4 sec. ON 22 sec. OFF
Approx. 10% = 80 Watts
LOW
F8A TEST THE MONITORED LATCH SWITCH
(SW1), + MONITOR SWITCH (SW3) FOR
PROPER OPERATION.