T2: HIGH VOLTAGE TRANSFORMER
(FRONT)
ASYMMETRIC RECTIFIER | C2: H.V. CAPACITOR |
H. V. RECTIFIER |
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T1: HIGH VOLTAGE TRANSFORMER
(REAR)
ASYMMETRIC RECTIFIER | C1: H.V. CAPACITOR |
H. V. RECTIFIER |
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COMMERCIAL FREQUENCY (50HZ)
POWER OUTPUT BY MAGNETRON 1
POWER OUTPUT BY MAGNETRON 2
OPERATION OF MAGNETRON
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MG2: MAGNETRON (LOWER) | MG1: MAGNETRON (UPPER) | ||||||
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Figure B-1. High Voltage Circuit
Figure B-2. Operation of Magnetron
FUNCTION OF IMPORTANT COMPONENTS
DOOR OPEN MECHANISM
1.The door release lever is pulled.
2.The upper latch head is lifted up by the linked door release lever.
3.The latch lever is lifted up by the door release lever.
4.The joint lever is lifted up by the latch lever.
5.The lower latch head is lifted up by the joint lever.
6.Now both latch heads are lifted up, so they can be released from the latch hook.
7.Now the door can be opened.
MONITOR SWITCH
The monitor switch is activated (the contacts opened) the upper latch head and switch lever A while the door is closed. The switch is intended to render the oven inopera- tive by means of blowing the fuse F6.3A when the contacts of the 1st latch switch fail to open when the door is opened.
Function
1. When the door is opened, the monitor switch contacts |
close (to the ON condition) due to their being normally |
closed. At this time the 1st latch switch is in the OFF |
Door release lever
Joint lever
Latch head
Latch head
Monitor switch
Latch hook
2nd. latch switch
1st. latch switch
Stop switch
3rd. latch switch
| condition (contacts open) due to their being normally |
| open contact switches. |
2. | As the door goes to a closed position, the monitor |
| switch contacts are opened and 1st latch switch con- |
| tacts are closed (On opening the door, each of these |
| switches operate inversely.) |
3. | If the door is opened and the 1st latch switch contacts |
| fail to open, the fuse F6.3A blows simultaneously with |
| closing of the monitor switch contacts. |
CAUTION:BEFORE REPLACING A BLOWN FUSE F6.3A TEST THE 1ST LATCH SWITCH, MONITOR SWITCH AND MONITOR RESIS- TOR FOR PROPER OPERATION. (REFER TO CHAPTER “TEST PROCEDURE”).
MONITOR RESISTOR
The monitor resistor prevents the fuse F6.3A 250V burst- ing when the fuse F6.3A 250V blows due to the operation of the monitor switch.
Figure D-1. Door Open Mechanism
1ST LATCH SWITCH, 2ND LATCH SWITCH, 3RD LATCH SWITCH AND STOP SWITCH
1.When the oven door is closed, the contacts
2.When the oven door is opened, the contacts
NOISE FILTER
The noise filter assembly prevents radio frequency inter- ference that might flow back in the power circuit.
WEAK POINT
If the wire harness or electrical components make a short- circuit, this weak point blows to prevent an electric shock or fire hazard.
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