R-269WM (serv.man11). Component Replacement And Adjustment Procedure - Sharp Home Appliance Service Manual (repair manual). Page 5

R269WM

11 – 5

1. CARRY OUT 3D CHECKS.

2. Remove the control panel assembly, referring to section of CON-

TROL PANEL ASSEMBLY REMOVAL.

3. Disconnect wire leads from the switches.

4. Remove two (2) screws holding latch hook to oven flange.

5. Remove latch hook assembly from oven flange.

6. Push outward on the two (2) retaining tabs holding switch in place.

7. Switch is now free.

1. Re-install each switch in its place. The 1st. latch switch and the

monitor switch are in the lower position and the 2nd. interlock relay
control switch is in the upper position.

2. Secure latch hook (with two (2) mounting screws) to oven flange.

3. Re-connect wire leads to each switch. Refer to pictorial diagram.

4. Reinstall the control panel assembly to the oven cavity.

5. Reconnect wire leads to the control unit, referring to the pictorial

diagram. 

6. Make sure that the monitor switch is operating properly and check

continuity of the monitor circuit. Refer to chapter “Test Procedure”
and Adjustment procedure.

1. CARRY OUT 3D CHECKS.

If the 1st. latch switch, 2nd. interlock relay control switch and monitor
switch do not operate properly due to a misadjustment, the following
adjustment should be made.

2. Loosen the two (2) screws holding 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. latch switch and 2nd. interlock relay control switch are acti-
vated 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 posi-
tion.

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.

2. When the door is open, the contacts of the 1st. latch switch and

2nd. interlock relay control switch open.

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 Micro-
wave Measurement Procedure.)

                          Figure C-5. Latch Switch Adjustments

1. Disconnect the power supply cord.

2. Open the door slightly.

3. Insert a putty knife (thickness of about 0.5mm) into the gap

between the choke cover and corner portion of door panel as
shown in Figure C-6 to free engaging parts.

4. Pry the choke cover by inserting a putty knife as shown Figure C-6.

5. Release choke cover from door panel.

6. Now choke cover is free.

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

                               Figure C-6. Door Disassembly

2nd. Interlock
Relay Control
Switch

1st. Latch Switch

Latch
Heads

Door

Switch Lever

Latch Hook

Monitor Switch

Choke Cover

Door Frame

Putty Knife