Sharp R-15AM Service Manual page 24

Commercial microwave oven
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R-15AM
1ST. INTERLOCK SWITCH, 2ND. INTERLOCK RELAY CONTROL SWITCH AND MONITOR
1. CARRY OUT 3D CHECKS.
2. Remove the control panel assembly referring to "CON-
TROL PANEL ASSEMBLY REMOVAL".
3. Disconnect the leads from all switches.
4. Remove the two (2) screws holding the latch hook to the
oven cavity.
5. Remove the latch hook.
6. Push the retaining tab outward slightly and remove the
switch.
Re-install
1. Re-install each switch in its place. The 2nd. interlock relay
control switch is in the lower position and the 1st. interlock
switch is in the upper position. The monitor switch is in the
middle position.
2. Re-connect wire leads to each switch.
Refer to pictorial diagram.
3. Secure latch hook (with two (2) mounting screws) to oven
flange.
1ST. INTERLOCK SWITCH, 2ND. INTERLOCK RELAY CONTROL SWITCH AND MONITOR
If the 1st. interlock switch, 2nd. interlock relay control switch
and monitor switch do not operate properly due to a mis-
adjustment, the following adjustment should be made.
1. CARRY OUT 3D CHECKS.
2. Loosen the two (2) screws holding the latch hook to the
oven cavity front flange.
3. With door closed, adjust latch hook by moving it back and
forth, and up and down. In and out play of the door allowed
by the upper and lower position of the latch hook should
be less than 0.5mm. The vertical position of the latch hook
should be adjusted so that the 1st. interlock switch and
2nd. interlock relay control switch are activated with the
door closed. The horizontal position of the latch hook
should be adjusted so that the plunger of the monitor
switch is pressed with the door closed.
4. Secure the screws with washers firmly.
5. Check the operation of all switches. If each switch has not
activated with the door closed, loosen screw and adjust
the latch hook position.
After adjustment, check the following.
1. In and out play of door remains less than 0.5mm when in
the latched position. First check upper position of latch
hook, pushing and pulling upper portion of door toward the
oven face. Then check lower portion of the latch hook,
pushing and pulling lower portion of the door toward the
oven face. Both results (play in the door) should be less
than 0.5mm.
CHOKE COVER
1. Disconnect the oven from the power supply.
2. Open the oven door and wedge it open.
3. Insert a putty knife (thickness of about 0.5mm) into the
gap between the choke cover and door frame as shown
in Figure C-6 to free engaging parts.
4. Pry the choke cover by inserting a putty knife as shown
in Figure C-6.
5. Release choke cover from door panel.
6. Now choke cover is free.
SWITCH REMOVAL
4. Make sure that the monitor switch is operating properly
and check continuity of the monitor circuit.
chapter "Test Procedure" and Adjustment procedure.
SWITCH ADJUSTMENT
2. The 1st. interlock switch and 2nd. interlock relay control
switch interrupt the circuit before the door can be opened.
3. Monitor switch contacts close when door is opened.
4. Re-install outer case and check for microwave leakage
around door with an approved microwave survey meter.
(Refer to Microwave Measurement Procedure.)
Handle
Lever
Door
Handle
Latch
Lever
Latch Head
DOOR PARTS REPLACEMENT
22
Latch Hook
Tabs
SW1:
1st. Interlock Switch
Tab
SW3: Monitor Switch
Tab
Tab
SW2: 2nd. Interlock Relay
Tab
Figure C-4. Switches
Latch Head
Latch Hook
Latch Switch
Lever A
SW1: 1st. Interlock Switch
Latch Switch
Lever C
Figure C-5. Latch Switch Adjustments
Choke Cover
Door Frame
Figure C-6. Door Disassembly
Refer to
Control Switch
Latch Switch
Lever B
SW3: Monitor Switch
SW2:
2nd. Interlock Relay
Control Switch
Putty Knife

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