Read Sharp R-464 (serv.man4) Service Manual online
R-464(SL)
21
1. CARRY OUT 3D CHECKS.
2. Remove the outer case.
3. Disconnect the wire leads from the switches.
4. Push outward on the one (1) retaining tabs holding
2. Remove the outer case.
3. Disconnect the wire leads from the switches.
4. Push outward on the one (1) retaining tabs holding
switch in place.
5. The switch is now free.
Reinstallation
1. Re-install each switch in its place. The 1st. interlock
Reinstallation
1. Re-install each switch in its place. The 1st. interlock
1ST. INTERLOCK SWITCH, 2ND. INTERLOCK RELAY CONTROL SWITCH AND MONITOR
SWITCH REMOVAL
switch is in the lower position and the 2nd interlock
relay control switch is in the upper position. The monitor
switch is in the middle position of the latch hook.
relay control switch is in the upper position. The monitor
switch is in the middle position of the latch hook.
2. Re-connect wire leads to each switch.
Refer to pictorial diagram.
3. Make sure that the monitor switch is operating properly
and check continuity of the monitor circuit. Refer to
chapter "Test Procedure" and Adjustment procedure.
chapter "Test Procedure" and Adjustment procedure.
1. CARRY OUT 3D CHECKS.
2. Remove the outer case.
2. Remove the outer case.
If the 1st. interlock switch, 2nd. interlock relay control
switch and monitor switch do not operate properly due to
a misadjustment, the following adjustment should be made.
3. Loosen the two (2) screws holding latch hook to the
switch and monitor switch do not operate properly due to
a misadjustment, the following adjustment should be made.
3. Loosen the two (2) screws holding latch hook to the
oven cavity front flange.
4. 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 1st.
interlock switch and 2nd. interlock relay control switch
are activated with the door closed. The horizontal
position of the latch hook should be adjusted so that the
plunger of the monitor switch is pressed with the door
closed.
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 1st.
interlock switch and 2nd. interlock relay control switch
are activated with the door closed. The horizontal
position of the latch hook should be adjusted so that the
plunger of the monitor switch is pressed with the door
closed.
5. Secure the screws with washers firmly.
6. Check the operation of all switches. If each switch has
6. Check the operation of all switches. If each switch has
not activated with the door closed, loosen screw and
adjust the latch hook position.
adjust the latch hook position.
After adjustment, check the following.
1. In and out play of door remains less than 0.5mm when
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
latch hook, pushing and pulling upper portion of door
1ST. INTERLOCK SWITCH, 2ND. INTERLOCK RELAY CONTROL SWITCH AND MONITOR
SWITCH ADJUSTMENT
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.
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.
2. The contacts of 1st. interlock switch and 2nd. interlock
relay control switch open within 1.6mm gap between
right side of cavity face plate and door when door is
open.
right side of cavity face plate and door when door is
open.
3. Monitor switch contacts close when door is opened.
4. Re-install outer case and check for microwave leakage
4. Re-install outer case and check for microwave leakage
around door with an approved microwave survey meter.
(Refer to Microwave Measurement Procedure.)
(Refer to Microwave Measurement Procedure.)
Figure C-4. Latch Switch Adjustments
REMOVAL
1. CARRY OUT 3D CHECKS.
2. Remove the outer case.
3. Remove the two (2) screws holding the front cover to
1. CARRY OUT 3D CHECKS.
2. Remove the outer case.
3. Remove the two (2) screws holding the front cover to
the base plate.
4. Remove the front cover from the oven cavity by releasing
the three (3) tabs.
5. Disconnect the 7-pin wire harness from the power
unit on the base plate.
6. Insert a putty knife (thickness of about 0.5mm) into the
gap between the choke cover and door frame as shown
in Figure C-5 to free engaging parts.
in Figure C-5 to free engaging parts.
7. Pry the choke cover by inserting a putty knife as shown
Figure C-5.
8. Release choke cover from door panel.
9. Now choke cover is free.
9. Now choke cover is free.
DOOR REPLACEMENT
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.
door panel assembly) to prevent microwave
leakage.
10.Release two (2) pins of door panel from two (2) holes
of upper and lower oven hinges by lifting up.
Choke Cover
Door Frame
Putty Knife
Latch
Heads
Heads
Door
Latch Hook
2nd. Interlock
Relay Control
Switch
Relay Control
Switch
1st. Interlock
Switch
Switch
Monitor Switch
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