R-891M - Sharp Home Appliance Service Manual (repair manual). Page 11

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891M -

7. Remove the one (1) nut holding the convection fan,

washers, pipe and auxiliary fan to the convection fan
motor shaft.

8. Remove the two (2) screws holding the convection motor

mounting plate to the convection fan duct.

9. Remove the pin on the convection fan motor shaft.
10. Remove the two (2) screws holding the convection motor

mounting plate to the convection fan motor.

11. Now, the convection fan motor is free.

CONVECTION FAN MOTOR
1. CARRY OUT3DCHECKS.
2. Remove the two (2) screws holding the back plate to oven

cavity.

3. Disconnect the wire leads from the convection motor.
4. Remove the two (2) screws holding the convection fan

duct to the oven cavity from out-side.

5. Remove the four (4) screws holding the convection fan

duct to the oven cavity.

6. Now the convection fan duct is free.

pulling lower portion of door toward the oven face. Both
results (plays of the door) should be less than 0.5mm.

2. The 1st latch switch and stop switch interrupt the circuit

before the door can be opened.

3. The monitor switch contacts of (COM.- NC.) close when

the door is opened and the monitored latch switch contacts
of (COM.- NO.) open and  contacts of (COM.- NC.) close
when the door is opened.

4. Re-install outer case and check for microwave leakage

around the door with an approved microwave survey
meter. (Refer to Microwave Measurement Procedure.)

If the monitored 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) screw holding the latch hook to the

oven cavity front flange.

3. With the door closed, adjust 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 0.5 mm.
The horizontal position of the latch hook should be placed
where the latch head has pushed the plungers of the
monitor switch with the door closed. The vertical position
of the latch hook should be placed where the latch head
has pushed the plungers of the monitored latch switch
and stop switch with the door closed.

4. Secure the screws firmly.
5. Make sure all of the switches operate. 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 holding latch hook to oven cavity
front flange and adjust the latch hook position.

After adjustment, make sure of the following:
1. In and out play of door remains less than 0.5 mm when

latched position. First check latch hook position, pushing
and pulling upper portion of door toward the oven face.
Then check the lower latch hook position, pushing and

LATCH
HEADS

LATCH HOOK

MONITORED LATCH
SWITCH

STOP SWITCH

OPEN LEVER

DOOR OPEN BUTTON

MONITOR 
SWITCH

GRILL HEATER
1. CARRY OUT 3D CHECKS
2. Disconnect the wire leads to the grill heating element.
3. Remove the two(2) screws holding the exhaust duct

assembly to the oven cavity.

4. Push the two tabs holding the grill heating element

assembly to the oven cavity.

5. Release the grill heating element assembly from the

oven cavity by sliding the cover.

6. Now the grill heating element assembly is free.

BOTTOM HEATER
1. CARRY OUT 3D CHECKS.
2. Remove the fan duct from the oven cavity.
3. Disconnect the wire leads from the bottom heating

element.

4. Remove the two (2) nuts holding the bottom heating

element to the oven cavity right wall.

5. Remove the two (2) nuts holding the bottom heating

element to the heater cover with the heat sealed spring
at the oven cavity left wall.

6. Remove the bottom heating element from the oven

cavity.