R-86STMA (serv.man11). Component Replacement And Adjustment Procedure - Sharp Home Appliance Service Manual (repair manual). Page 6

R86STMA

11 – 6

If the monitored latch switch, stop 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. 3. With the door closed, adjust the latch hook by moving it back and

forward or up and down. In and out play of the door allowed by the
latch hook should be less than 0.5mm. The horizontal position of
the latch hook should be placed where the monitor switch has acti-
vated with the door closed. The vertical position of the latch hook
should be placed where the monitored latch switch and stop switch
have activated with the door closed.

4. Secure the screws with washers firmly.

5. Make sure of the all switches operation. If the latch head has not

pushed the plungers of the monitor switch with door closed, adjust
the latch hook position. At that time, the latch head should have
pushed the plungers of the monitored latch switch and stop switch.
If the latch head has not pushed the plungers of the monitored latch
switch and stop switch with door closed, loose two (2) screws hold-
ing latch hook to oven cavity front flange and adjust the latch hook
position.

1. In and out play of door remains less than 0.5mm when latched

position. First check the latch hook position, pushing and pulling
upper portion of the door toward the oven face. Then check the
lower latch hook position, pushing and pulling lower portion of the
door toward the oven face. Both results (play of the door) should be
less than 0.5mm.

2. The stop switch interrupts the circuit before the door can be

opened.

3. When the door is opened, the contacts (COM-NC) of the monitor

switch and monitored latch switch close. And the contacts (COM-
NO) of their switches open. 

4. When the door is closed the contacts (COM-NC) of the monitor

switch and monitored latch switch open. And the contacts (COM-
NO) of their switches close.

5. Reinstall outer case and check for microwave leakage around the

door with an approved microwave survey meter. (Refer to Micro-
wave Measurement Procedure.)

Figure C-6 Latch Switches Adjustment

1. REMOVAL
DOOR FRAME ASSEMBLY

1. Disconnect the oven from the power supply.

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-7 to
free engaging parts.

4. Release choke cover from door panel.

5. Now choke cover is free.

NOTE: When carrying out any repair to the door, do not bend or warp

the slit choke (tabs on the door panel assembly) to prevent
microwave leakage.

Figure C-7. Door Disassembly

6. Lift the door upwards.

7. Now, door frame assembly is free from oven cavity.

DOOR PANEL

8. Remove the six (6) screws holding the door panel to the door

frame.

9. Now, door panel is free.

LATCH HEAD AND SPRING

10.Slide latch head upward and remove it from door frame with releas-

ing latch spring from door frame and latch head.

11.Now, latch head and latch spring are free.

12.Remove the two (2) door glass stopper from the door frame.

13.Remove the front door glass from the door frame by sliding right-

wards.

14.Now, the front door glass is free.

1. Insert the front door glass to the door frame.

2. Fit the two (2) door glass stopper to the door frame to hold the front

door glass.

3. Reinstall the latch spring to the latch head. Re-install the latch

spring to the door frame. Re-install latch head to door frame.

4. Reinstall door panel to door frame.

5. Hold the door panel to the door frame with six (6) screws.

6. Located door panel hinge pins into cavity hinge location hole.

7. Reinstall choke cover to door panel by clipping into position.

LATCH

HEADS

LATCH HOOK

DOOR OPEN BUTTON

OPEN LEVER

DOOR

MONITOR SWITCH

MONITORED LATCH

SWITCH

STOP SWITCH

Choke Cover

Putty Knife

Door Frame