Door Replacement - Sharp R-1880LS Service Manual

DOOR SENSING SWITCH, SECONDARY,
THIRD DOOR SWITCH AND MONITOR SWITCH
ADJUSTMENT
If the door sensing switch, secondary,primary switch and moni-
tor switch do not operate properly due to a misadjustment, the
following adjustment should be made.
1. Disconnect the power supply cord and remove the oven from
wall and remove outer case. (Refer to procedure of "Removal
of Oven from Wall" and "Outer case Removal")
. Open the door and block it open.
3. Discharge high voltage capacitor.
4. Loosen the two () screws holding latch hook to the oven
cavity front flange.
5. 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 door sensing switch, secondary
and third door 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.
6. Secure the screws with washers firmly.
7. Check the all switches operation. If the 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.
. The door sensing switch, secondary and third door switch

DOOR REPLACEMENT

DOOR ASSEMBLY REMOVAL
1. Unplug the oven from power outlet and remove the oven from
wall and remove outer case. (Refer to procedure of "Removal
of Oven from Wall" and "Outer case Removal")
. Remove one (1) screw holding the hood exhaust louver to the
oven cavity with outer case cabinet, as shown in Figure C-.
3. Remove the hood exhaust louver from the oven cavity by
pushing right and left tabs of the hood exhaust louver, as shown
in Figure C-.
4. Remove the sash left from the oven cavity from face plate by
lifting it up.
5. Push the door open button and open the door slightly.
6. Insert an putty knife (thickness of about 0.5mm) into the gap
A between the door stopper and the choke cover as shown in
Figure C-3 to free engaging parts.
7. Lift up the door stopper.
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
DOOR
OPEN LEVER
Figure C-1. Latch Switch Adjustments
8. Now, the door stopper is free from the door assembly.
9. Lift up the door assembly to release the upper and lower door
hinge pins from the upper and lower oven hinges.
10. Now, the door assembly is free.
Note: When the individual parts are replaced, refer to
"Door Disassembly".
DOOR ASSEMBLY RE-INSTALL
1. On re-installing door, insert the lower oven hinge to lower
door hinge pin.
. Insert the upper oven hinge to the upper door hinge pin.
3. Shut the door (close the contacts of interlock switches).
4. Make sure upper and lower oven hinges are inserted into the
upper an lower door hinge pins.
5. Make sure the door is parallel with oven face lines (left and
upper side lines) and door latch heads pass through latch holes
correctly.
47
R-1880LS/LST
LATCH HOOK
DOOR SENSING
SWITCH
MONITOR FUSE
MONITOR
SWITCH
THIRD
DOOR
SWITCH
SECONDARY
INTERLOCK
SWITCH