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The manual is useful for trouble shooting for an old instrument. It saved money,and let me enjoy DIY.
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Perfect source of information for replacing the HDD and performing general diagnostics.
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Perfect source of information for replacing the HDD and performing general diagnostics.
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OPERATING SEQUENCE
OFF CONDITION
Closing the door activates all door interlock switches (monitored latch switch and latch switch). IMPORTANT When the timer knob is at "0" the oven is in the OFF condition.
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 26-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
26 sec. ON HIGH 20 sec. ON MEDIUM HIGH 14 sec. ON MEDIUM 8 sec. ON MEDIUM LOW 4 sec. ON LOW 22 sec. OFF Approx. 10% = 80 Watts 18 sec. OFF Approx. 30% = 240 Watts 12 sec. OFF Approx. 50% = 400 Watts 6 sec. OFF Approx. 70% = 560 Watts Approx. 100% = 800 Watts
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.
DOOR SWITCHES
DOOR OPEN MECHANISM
MONITORED LATCH SWITCH (SW1) LATCH 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.
SW1: MONITORED LATCH SWITCH SW2: MONITOR LATCH HEADS SWITCH SW3: LATCH SWITCH
LATCH HOOK
DOOR
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, the fuse M8A blows simultaneously with closing the contacts (COM - NC) of the monitor switch (SW2). CAUTION: BEFORE REPLACING A BLOWN FUSE (F) M8A TEST THE MONITORED LATCH SWITCH (SW1), + MONITOR SWITCH (SW2) FOR PROPER OPERATION.
DOOR OPEN BUTTON
OPEN LEVER
Figure D-1. Door Open Mechanism
R-201M - 4
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