Sharp R-677W Service Manual page 28

COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE
PRIMARY LATCH SWITCH, STOP SWITCH AND MONITOR SWITCH ADJUSTMENT
If the primary 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 one (1) screw 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 primary latch
switch and stop switch have activated with the door
closed.
4. Secure the screws with washers firmly.
5. Make sure of the primary latch switch, stop switch and
monitor switch operation. If those switches have not
activated with the door closed, one (1) screw 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, push-
ing and pulling the door toward the oven face. The
REMOVAL
1. CARRY OUT 3D CHECKS.
2. Push the open button and open the door slightly.
3. Insert an putty knife (thickness of about 0.5mm) into the
gap between the choke cover and door PANEL as
shown in Figure C-7 to free engaging parts.
5. Release choke cover from door panel.
6. Now choke cover is free.
DOOR PANEL
Figure C-7. Door Disassembly
7. Release two (2) pins of door panel from two (2) holes
of upper and lower oven hinges by lifting up.
8. Now, door sub assembly is free from oven cavity.
9. Remove the four (4) screws holding the door panel to
the door frame.
10.Now, door panel is free.
DOOR REPLACEMENT
PUTTY KNIFE
CHOKE COVER
DOOR FRAME
R-677 - 28
results (play of the door) should be less than 0.5mm.
2. The contacts (COM-NO) of the primary latch switch
and stop switch interrupt the circuit before the door can
be opened.
3. The contacts (COM-NC) of the monitor switch close
when the 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.)
LATCH HOOK
DOOR
LATCH
HEADS
DOOR OPEN BUTTON
Figure C-6 Latch Switches Adjustment
11.Slide latch head upward and remove it from door frame
with releasing latch spring from door frame and latch
head.
12.Now, latch head and latch spring are free.
13.Remove the two (2) screws holding the glass stopper
to the door frame.
14.Remove the glass stopper from the door frame.
15.Slide the front door glass leftwards and then slide
upwards to release the tabs holding it.
16.Now, the front door glass is free
RE-INSTALL
1. Re-install the front door glass to the door frame as
follows.
1) Insert the upper edge of the front door glass into the five
(5) tabs of the door frame.
2) Slide the front door glass downwards and insert the
lower edge of the front door glass into the five (5) tabs
of the door frame.
3) Slide the front door glass rightwards and insert the right
edge of the front door glass into the one (1) long tab of
the door frame.
2. Re-install the glass stopper o the door frame as follows.
1) Re-install the glass stopper to the door frame so that
the two (2) holes of the glass stopper meet the two (2)
pins of the door frame.
2) Hold the glass stopper to the door frame with the two
(2) screws.
3. Re-install the latch spring to the latch head. Re-install
the latch spring to the door frame. Re-install latch head
to door frame.
...
CONT
MONITOR SWITCH
PRIMARY
(MONITORED)
LATCH SWITCH
STOP SWITCH
OPEN LEVER