Door Replacement; Latch Switch Adjustments; Door Disassembly - Sharp R-820BK Service Manual

Sharp double grill convection microwave oven

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Owner's manual (44 pages)

Operation manual with cookbook (28 pages)

Table Of Contents

Table of Contents

4. Remove the control panel assembly referring to

"CONTROL PANEL ASSEMBLY REMOVAL".

5. Disconnect the leads from all switches.

6. Remove the two (2) screws holding the latch hook to the

oven cavity.

7. Remove the latch hook.

8. Push the retaining tab slightly and remove the switch.

DOOR SENSING SWITCH/SECONDARY INTERLOCK SWITCH AND MONITOR SWITCH ADJUSTMENT

1. Disconnect the power supply cord and then remove

outer case.

2. Open the door and block it open.

3. Discharge high voltage capacitor.

If the door sensing switch, secondary interlock switch and

monitor switch do not operate properly due to a

misadjustment, the following adjustment should be made.

4. Loosen the two (2) screws holding latch hook to the oven

cavity front flange.

5. 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 door sensing

switch and secondary interlock 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.

6. Secure the screws with washers firmly.

7. 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

REMOVAL

1. Disconnect the power supply cord.

2. Push the open button and open the door slightly.

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 principles of the lever and lift up 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.

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.

2. The door sensing switch and secondary interlock 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.)

Figure C-5. Latch Switch Adjustments