Sharp R-84ST Service Manual page 31

COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE
1. CARRY OUT 3D CHECKS.
2. Remove the two (2) screws holding the two (2) terminals
of the main wire harness to the top heating element.
3. Remove the two (2) screws holding the two (2) grill heater
angles to the top of the oven cavity.
4. Remove the two (2) grill heater angles from the oven
1. CARRY OUT 3D CHECKS.
2. Remove the turntable motor cover from the base plate,
referring to "TURNTABLE MOTOR REPLACEMENT".
3. Disconnect the wire leads from the bottom heating element.
MONITORED LATCH SWITCH, MONITOR SWITCH AND STOP SWITCH REMOVAL
1. CARRY OUT 3D CHECKS.
2. Remove the control panel assembly referring to
"CONTROL PANEL ASSEMBLY REMOVAL".
3. Remove the open lever from the oven cavity front plate by
removing the control panel assembly.
4. Disconnect the leads from all switches.
5. Remove the two (2) screws holding the latch hook to the
oven cavity.
6. Remove the latch hook.
7. Remove the switch(es) from the latch hook by pushing the
retaining tab backwards slightly and turning the switch(es)
on the post.
8. Now the switch(es) is free.
MONITORED LATCH SWITCH, STOP SWITCH AND MONITOR SWITCH ADJUSTMENT
If the monitored latch switch, stop switch and monitor switch
do not operate properly due to a mis-adjustment, the follow-
ing adjustment should be made.
1. CARRY OUT 3D CHECKS.
2. Loosen the two (2) screws holding the latch hook to the
oven cavity front flange.
3. With the door closed, adjust the 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 monitor switch has activated with the
door closed. The vertical position of the latch hook should
be placed where the monitored latch switch and stop
switch have activated with the door closed.
4. Secure the screws with washers firmly.
5. Make sure of the all switches operation. 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 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 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 the door toward the oven face. The results
TOP HEATING ELEMENT REMOVAL
BOTTOM HEATING ELEMENT REMOVAL
4. Remove the two (2) nuts holding the bottom heating element
5. Remove the heater cover and the heater packing from the
6.
R-84ST - 31
cavity.
5. Remove the top heating element from the top of the oven
cavity.
6. Now the top heating element is free.
to the oven cavity.
bottom heating element.
Remove the bottom heating element from the oven
MONITOR SWITCH
1ST LATCH SWITCH
TAB
TAB
STOP SWITCH
Figure C-5. Switches
(play of the door) should be less than 0.5mm.
2. The stop switch interrupt the circuit before the door can
be opened.
3. When the door is opened the contacts (COM-NC) of the
monitor switch and monitored latch switch close. And the
contacts (COM-NO) of their switches open.
4. When the door is closed the contacts (COM-NC) of the
monitor switch and monitored latch switch open. And the
contacts (COM-NO) of their switches close.
5. Re-install outer case and check for microwave leakage
around the door with an approved microwave survey
meter. (Refer to Microwave Measurement Procedure.)
LATCH HOOK
LATCH
HEADS
DOOR OPEN BUTTON
Figure C-6. Switch Adjustment
MONITOR
SWITCH
MONITORED LATCH
SWITCH
STOP SWITCH
OPEN LEVER