Sharp R-3A88, Service Manual

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R-3A88
should be less than 0.5mm. The vertical position of the
latch hook should be adjusted so that the 1st. latch
switch 2nd. interlock relay control switch are activated
with the door closed. The horizontal position of the latch
hook should be adjusted so that the monitor switch is
activated with the door closed.
3. Secure the screws with washers firmly.
4. Check the operation of all switches. If any 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.
2. The 1st. latch 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.)
LATCH
HEADS
LATCH HOOK
2ND. INTERLOCK
RELAY CONTROL
SWITCH
MONITOR
SWITCH
SWITCH
LEVER
1ST. LATCH
SWITCH
Figure C-5. Latch Switch Adjustments
Putty Knife
Door frame
Choke Cover
12
11
10
9
8
7
6
5
4
3
2
1
Figure C-6. Door Disassembly
RE-INSTALL
1. Re-install door screen to door frame by fitting two (2) tabs
of door frame to two (2) holes of door screen.
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 nine (9) tabs
of door frame to nine (9) holes of door panel.
4. Hold the door panel to the door frame with two (2)
screws.
5. Put sealer film on door panel. Refer to "Sealer Film"
about how to handle new one.
6. Catch two (2) pins of door panel on two (2) hole of upper
and lower oven hinges.
7. Re-install choke cover to door panel by pushing.
DOOR REPLACEMENT
REMOVAL
1. Disconnect oven from power supply.
2. Push the open button and open the door slightly.
3. Insert an putty knife (thickness of about 0.5mm) into the
gap between the choke cover and corner portion of door
frame as shown Figure C-6 to free engaging parts.
4. Try the principles of the lever and lift up 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.
7. Release two (2) pins of door panel from two (2) hole of
upper and lower oven hinges by lifting up.
8. Now, door panel is free from oven cavity.
9. Remove the two (2) screws holding the door panel to the
door frame.
10.Release door panel from nine (9) tabs of door frame by
sliding door panel downward.
11.Now, door panel with sealer film is free.
12.Tear sealer film from door panel.
13.Now, door panel is free.
14.Slide latch head upward and remove it from door frame
with releasing latch spring from door frame and latch
head.
15.Now, latch head and latch spring are free.
16.Remove door screen from door frame by releasing two
(2) tabs.
17.Now, door screen is free.