Sharp R-90GCH Service Manual page 35

After adjustment, check the following.
1. In and out play of the door remains less than 0.5 mm
when in the latched position. First check the position of
the latch hook right, pushing and pulling right portion of
the door toward the oven face. Then check the position
of the latch hook left, pushing and pulling left portion of
the door toward the oven face. Both results (play in the
door) should be less than 0.5 mm.
2. The door sensing switch, 3rd. latch switch and the
secondary interlock switch interrupt the circuit before
the door can be opened.
3. The monitor switch contacts close when the door is
opened.
4. Reinstall the outer case cabinet and check for
microwave leakage around the door with an approved
microwave survey meter. (Refer to Microwave
Measurement Procedure.)
Door assembly removal
1. CARRY OUT 3D CHECKS.
2. Close the door.
3. Remove the two (2) door springs from the door cam right,
oven hinge right, door cam left and oven hinge left.
4. Release the door cams right and left from the right and
left door cam pins of the door.
5. Remove the door cams right and left from the oven
cavity front plate.
6. Open the door assembly at an angle of more than 90˚
with the oven cavity front plate.
7. To release the right and left door hinge pins of the door
assembly from the oven hinges right and left, slide the
door assembly leftward. When removing the door
assembly, hold the door assembly to prevent it from
falling.
8. Now, the door assembly is free.
NOTE: When the individual parts are replaced, refer to
"Door Disassembly"
Door assembly reinstallation
1. On reinstalling the door assembly, insert the oven hinges
right and left into the right and left door hinge pins.
2. Insert and hook the door cams right and left to the right
and left door cam pins.
3. Reinstall the two (2) door springs between the door
cams and the oven hinges right and left.
NOTE: After any service to the door;
(A) Make sure that the door sensing switch, 3rd. latch
switch, secondary interlock switch and the monitor
switch are operating properly. (Refer to chapter
"Test Procedure".)
(B) An approved microwave survey meter should be
used to assure compliance with proper microwave
radiation emission limitation standards.
Door adjustment
When removing and/or loosening the oven hinges such as
in door replacement, the following adjustment criteria are
taken.
Door adjustment is performed with the door properly
installed and closed and while the oven hinges are loose.
1. Loosen the screws holding the oven hinge right and the
DOOR REPLACEMENT AND ADJUSTMENT
SW2:
Monitor switch
Latch
head
Latch hook right
Figure C-3. Latch Switch Adjustment
oven hinge left to the bottom plate with screwdriver.
2. Adjust the door by moving it so that the door is parallel
with the oven cavity front plate lines (right and left side
lines) and the door latch heads pass through the latch
holes correctly.
3. Tighten the screws holding the oven hinge right and the
oven hinge left to the bottom plate.
After adjustment, make sure of the following:
1. The door latch heads smoothly catch the latch hooks
through latch holes and the latch heads goes through
centre of latch holes.
2. The door is positioned with its face pressed toward
oven cavity front plate.
3. Reinstall the outer case cabinet and check for
microwave leakage around the door with an approved
microwave survey meter. (Refer to Microwave
Measurement Procedure.)
NOTE: The door on a microwave oven is designed to
act as an electronic seal preventing the leakage
of microwave energy from the oven cavity
during cook cycle. This function does not
require that the door be airtight, moisture
(condensation)-tight or light-tight. Therefore,
occasional appearance of moisture, light or
sensing of gentle warm air movement around
the oven door is not abnormal and do not of
themselves indicate a leakage of microwave
energy from the oven cavity. If such were the
case, your oven could not be equipped with a
vent, the very purpose of which is exhaust the
vapour-laden air from the oven cavity.
Door cam left
Door spring
Oven hinge
left
Door
assembly
Figure C-4(a). Door Replacement
33
R-90GCH
Latch hook left
SW1:
Secondary
interlock switch
(Monitored latch switch)
SW3:
3rd. latch
switch
Latch
head
SW4:
Door
sensing switch
(Primary interlock
relay control switch)
Door cam right
Oven hinge
right
Door
spring