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R238A(SL)

10 – 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. The 1st. latch switch and 2nd. interlock relay control switch inter-

rupt 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 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 in order shown in fig-

ure 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

Latch
Heads

Door

Switch Lever

Latch Hook

Monitor Switch

2nd. Interlock
Relay Control
Switch

1 st. Latch
Switch

Choke Cover

Door Frame

Putty Knife

R238A(SL)

10 – 6

                               Figure C-6. Door Disassembly

7. Release two (2) pins of door panel from two (2) holes of upper and

lower oven hinges by lifting up.

8. Now, door panel is free from oven cavity.

9. Release door panel from ten (10) tabs of door frame and remove

door frame by sliding the door panel downward.

10.Now, door panel with sealer film is free.

11.Tear sealer film from door panel.

12.Now, door panel is free.

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

ing latch spring from door frame and latch head.

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

15.Remove door screen from door frame.

16.Now, door screen is free.

1. Re-install door screen to door frame.

2. Re-install latch spring to the head. Re-install latch spring to the

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

3. Re-install door panel to door frame by fitting ten (10) tabs of door

frame to ten (10) holes of door panel.

4. Put sealer film on door panel. Refer to “Sealer Film” and figure C-8,

on how to handle the new film.

5. Catch two (2) pins of door panel on two (2) hole of upper and lower

oven hinges.

6. Re-install choke cover to door panel by pushing.

NOTE: After any service to the door;

1) Make sure that 1st. latch switch, 2nd. interlock relay control switch

and monitor switch are operating properly. (Refer to chapter “Test
Procedures”.).

2) An approved microwave survey meter should be used to assure

compliance with proper microwave radiation emission limitation
standards.

1. Door latch heads smoothly catch latch hook through latch holes

and that latch head goes through center of latch hole.

2. Deviation of door alignment from horizontal line of cavity face plate

is to be less than 1.0mm.

3. Door is positioned with its face pressed toward cavity face plate.

4. Check for microwave leakage around door with an approved micro-

wave survey meter. (Refer to Microwave Measurement Procedure.)

NOTE: The door on a microwave oven is designed to act as an

           Figure C-7. Door Replacement

1. Put the adhesive tape on the backing film of the sealer film as

shown in Fig. C-8

2. Tear the backing film by pulling the adhesive tape.

3. Put the pasted side of the sealer film on the door panel

                              Figure C-8. Sealer film

Upper Oven
Hinge

Lower
Oven Hinge

Pin

Upper
Oven Hinge

Slit choke of
door panel

Choke Cover

Pin

Lower Oven

Hinge

Sealer film

Backing film

Adhesive tape

R238A(SL)

10 – 6

                               Figure C-6. Door Disassembly

7. Release two (2) pins of door panel from two (2) holes of upper and

lower oven hinges by lifting up.

8. Now, door panel is free from oven cavity.

9. Release door panel from ten (10) tabs of door frame and remove

door frame by sliding the door panel downward.

10.Now, door panel with sealer film is free.

11.Tear sealer film from door panel.

12.Now, door panel is free.

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

ing latch spring from door frame and latch head.

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

15.Remove door screen from door frame.

16.Now, door screen is free.

1. Re-install door screen to door frame.

2. Re-install latch spring to the head. Re-install latch spring to the

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

3. Re-install door panel to door frame by fitting ten (10) tabs of door

frame to ten (10) holes of door panel.

4. Put sealer film on door panel. Refer to “Sealer Film” and figure C-8,

on how to handle the new film.

5. Catch two (2) pins of door panel on two (2) hole of upper and lower

oven hinges.

6. Re-install choke cover to door panel by pushing.

NOTE: After any service to the door;

1) Make sure that 1st. latch switch, 2nd. interlock relay control switch

and monitor switch are operating properly. (Refer to chapter “Test
Procedures”.).

2) An approved microwave survey meter should be used to assure

compliance with proper microwave radiation emission limitation
standards.

1. Door latch heads smoothly catch latch hook through latch holes

and that latch head goes through center of latch hole.

2. Deviation of door alignment from horizontal line of cavity face plate

is to be less than 1.0mm.

3. Door is positioned with its face pressed toward cavity face plate.

4. Check for microwave leakage around door with an approved micro-

wave survey meter. (Refer to Microwave Measurement Procedure.)

NOTE: The door on a microwave oven is designed to act as an

           Figure C-7. Door Replacement

1. Put the adhesive tape on the backing film of the sealer film as

shown in Fig. C-8

2. Tear the backing film by pulling the adhesive tape.

3. Put the pasted side of the sealer film on the door panel

                              Figure C-8. Sealer film

Upper Oven
Hinge

Lower
Oven Hinge

Pin

Upper
Oven Hinge

Slit choke of
door panel

Choke Cover

Pin

Lower Oven

Hinge

Sealer film

Backing film

Adhesive tape

R238A(SL)

10 – 6

                               Figure C-6. Door Disassembly

7. Release two (2) pins of door panel from two (2) holes of upper and

lower oven hinges by lifting up.

8. Now, door panel is free from oven cavity.

9. Release door panel from ten (10) tabs of door frame and remove

door frame by sliding the door panel downward.

10.Now, door panel with sealer film is free.

11.Tear sealer film from door panel.

12.Now, door panel is free.

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

ing latch spring from door frame and latch head.

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

15.Remove door screen from door frame.

16.Now, door screen is free.

1. Re-install door screen to door frame.

2. Re-install latch spring to the head. Re-install latch spring to the

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

3. Re-install door panel to door frame by fitting ten (10) tabs of door

frame to ten (10) holes of door panel.

4. Put sealer film on door panel. Refer to “Sealer Film” and figure C-8,

on how to handle the new film.

5. Catch two (2) pins of door panel on two (2) hole of upper and lower

oven hinges.

6. Re-install choke cover to door panel by pushing.

NOTE: After any service to the door;

1) Make sure that 1st. latch switch, 2nd. interlock relay control switch

and monitor switch are operating properly. (Refer to chapter “Test
Procedures”.).

2) An approved microwave survey meter should be used to assure

compliance with proper microwave radiation emission limitation
standards.

1. Door latch heads smoothly catch latch hook through latch holes

and that latch head goes through center of latch hole.

2. Deviation of door alignment from horizontal line of cavity face plate

is to be less than 1.0mm.

3. Door is positioned with its face pressed toward cavity face plate.

4. Check for microwave leakage around door with an approved micro-

wave survey meter. (Refer to Microwave Measurement Procedure.)

NOTE: The door on a microwave oven is designed to act as an

           Figure C-7. Door Replacement

1. Put the adhesive tape on the backing film of the sealer film as

shown in Fig. C-8

2. Tear the backing film by pulling the adhesive tape.

3. Put the pasted side of the sealer film on the door panel

                              Figure C-8. Sealer film

Upper Oven
Hinge

Lower
Oven Hinge

Pin

Upper
Oven Hinge

Slit choke of
door panel

Choke Cover

Pin

Lower Oven

Hinge

Sealer film

Backing film

Adhesive tape