Read Sharp R-734 (serv.man2) Service Manual online
R-734 - 28
If the monitored latch 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) screws holding the latch hook to
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) 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 acti-
vated 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.
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 acti-
vated 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 monitored latch switch, stop switch
5. Make sure of the monitored latch switch, stop switch
and monitor switch operation. If those switches have
not activated with the door closed, repeat step 1 - 4.
not activated with the door closed, repeat step 1 - 4.
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, push-
ing and pulling upper position of the door toward the
oven face. The results (play of the door) should be less
ing and pulling upper position of the door toward the
oven face. The results (play of the door) should be less
MONITORED LATCH SWITCH, STOP SWITCH AND MONITOR SWITCH ADJUSTMENT
than 0.5mm.
2. The contacts (COM-NO) of monitored latch switch and
stop switch interrupt the circuit before the door can be
opened.
opened.
3. The contacts (COM-NC) of the monitor switch close
when 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.)
meter. (Refer to Microwave Measurement Procedure.)
Figure C-7 Latch Switches Adjustment
REMOVAL
1. CARRY OUT 3D CHECKS.
2. Pull the door handle to open the door.
3. Insert an putty knife (thickness of about 0.5mm) into the
2. Pull the door handle to open the door.
3. Insert an putty knife (thickness of about 0.5mm) into the
gap between the choke cover and door frame as shown
in Figure C-8 to free engaging parts.
in Figure C-8 to free engaging parts.
4. Release choke cover from door panel.
5. Now choke cover is free.
5. Now choke cover is free.
DOOR REPLACEMENT
Figure C-8. Door Disassembly
MONITORED LATCH SWITCH, MONITOR SWITCH AND STOP SWITCH REMOVAL
1. CARRY OUT 3D CHECKS.
2. Remove the control panel assembly referring to "CON-
2. Remove the control panel assembly referring to "CON-
TROL PANEL ASSEMBLY REMOVAL".
3. Disconnect the leads from all switches.
5. Remove the two (2) screws holding the latch hook to
5. Remove the two (2) screws holding the latch hook to
the oven cavity.
6. Remove the latch hook.
7. Push the retaining tab slightly and remove switch.
8. Now the switch(es) is free.
7. Push the retaining tab slightly and remove switch.
8. Now the switch(es) is free.
Figure C-6. Switches
Door frame
Choke cover
Putty knife
Stop Switch
(SW3)
(SW3)
Monitor Switch
(SW2)
(SW2)
Monitored
Latch Switch
(SW1)
Latch Switch
(SW1)
Latch Hooks
Stop Switch
(SW3)
(SW3)
Monitor
Switch
(SW2)
Monitored
Latch
Switch
(SW1)
Switch
(SW2)
Monitored
Latch
Switch
(SW1)
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE
Click on the first or last page to see other R-734 (serv.man2) service manuals if exist.