Read Sharp R-657SL (serv.man10) Service Manual online
R657(W)
11 – 5
[14] MONITORED LATCH SWITCH, STOP SWITCH AND MONITOR SWITCH ADJUSTMENT
1. Adjustment
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.
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. And also loosen the one (1) screw holding air intake
duct to the latch hook.
duct to the latch hook.
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.
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.
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 not pushed the plungers of the monitored latch
switch and stop switch with door closed, loose two (2) screws hold-
ing latch hook to oven cavity front flange and adjust the latch hook
position.
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 hold-
ing latch hook to oven cavity front flange and adjust the latch hook
position.
2. After adjustment, make sure of following.
1. In and out play of door remains less than 0.5 mm when latched
position. First check the latch hook position, pushing and pulling
upper portion of the door toward the oven face.
upper portion of the door toward the oven face.
Then check the lower latch hook position, pushing and pulling
lower portion of the door toward the oven face. Both results (play of
the door) should be less than 0.5mm.
lower portion of the door toward the oven face. Both results (play of
the door) should be less than 0.5mm.
2. The contacts (COM-NO) of the stop switch and the monitored latch
switch open within 1.6mm gap between right side of cavity face
plate and door when door is opened.
plate and door when door is opened.
3. When the door is closed, the contacts (COM-NO) of the stop switch
close.
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.
NO) of their switches close.
5. Re-install outer case cabinet and check for microwave leakage
around the door with an approved microwave survey meter. (Refer
to Microwave Measurement Procedure.)
to Microwave Measurement Procedure.)
Figure C-4 Latch Switches Adjustment
[15] DOOR REPLACEMENT
1. REMOVAL
1. Disconnect the power supply cord.
2. Open the door slightly and remove the built in frame assembly (Ref:
to chapter built in frame assembly removal).
3. Remove the choke cover taking care not to break clips by inserting
an iron plate (thickness of about 0.5mm) or flat type screw driver to
the gap between the choke cover and door panel as shown Figure
C-5 to free the engaged parts.
the gap between the choke cover and door panel as shown Figure
C-5 to free the engaged parts.
4. Release choke cover from door panel.
5. Now choke cover is free.
Figure C-5. Door Disassembly
NOTE: When carrying out any repair to the door, do not bend or warp
the slit choke (Tabs on the door panel assembly) to prevent
microwave leakage.
microwave leakage.
6. Release two (2) pins of door panel from two (2) holes of upper and
lower oven hinges by lifting up.
7. Remove door panel by removing screws (4).
8. Release door panel from tabs of door frame and remove door
frame.
9. Now, door panel with inner sealer film is free.
10.Tear inner sealer film from door panel.
11.Now, door panel is free.
12.Slide latch head upward and remove it from door frame with releas-
ing latch spring from door frame and latch head.
13.Now, latch head and latch spring are free.
2. REINSTALLATION
1. Re-install latch spring to the head. Re-install latch spring to the
door frame. Re-install latch head to the door frame.
2. Re-install door panel to door frame by fitting tabs of door frame to
holes of door panel.
3. Put sealer film on door panel. Refer to “Inner Sealer Film” and fig-
ure C-7, on how to handle the new film.
4. Catch two (2) pins of door panel on two (2) hole of upper and lower
oven hinges.
5. Re-install choke cover to door panel by pushing.
NOTE: After any service to the door;
1) Make sure that the monitor switch, monitored latch
switch and stop switch are operating properly. (Refer
to chapter “Test Procedures”.).
to chapter “Test Procedures”.).
2) An approved microwave survey meter should be used
to assure compliance with proper microwave radiation
emission limitation standards.
emission limitation standards.
Latch hook
Door
Stop switch
Latch Heads
Monitor switch
Monitored
latch switch
latch switch
10
5
4
12
8
7
9
11
3
2
1
Choke Cover
Door Frame
Putty Knife
6
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