Service manual

R-880B
31
If the 1st. latch switch, 2nd. interlock relay control 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 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 1st. latch switch
and 2nd. interlock relay control switch have activated
with the door closed.
4. Secure the screws with washers firmly.
5. Make sure of the 1st. latch switch, 2nd. interlock relay
control switch and monitor switch operation. If those
switches have not activated with the door closed, two
(2) 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-
1ST. LATCH SWITCH, 2ND. INTERLOCK RELAY CONTROL SWITCH
AND MONITOR SWITCH ADJUSTMENT
ing and pulling the door toward the oven face. The
results (play of the door) should be less than 0.5mm.
2. The contacts (COM-NO) of the 1st. latch switch and
2nd. interlock relay control 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.)
Figure C-4 Latch Switches Adjustment
Latch Hook
Latch Heads
Door
1st. Latch Switch
2nd. Interlock
Relay Control
Switch
Monitor Switch
Switch Lever
DOOR REPLACEMENT
REMOVAL
1. Disconnect the oven from power supply.
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 frame as shown
in Figure C-5 to free engaging parts.
4. Pry the choke cover by inserting a putty knife as shown
in Figure C-5.
5. Release choke cover from door panel.
6. Now choke cover is free.
Figure C-5. 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.Release door panel from seven (7) tabs of door frame
by sliding door panel downward.
11.Now, door panel is free.
12.Slide latch head upward and remove it from door frame
with releasing latch spring from door frame and latch
head.
13.Now, latch head and latch spring are free.
14.Remove the two (2) screws holding the glass stopper
to the door frame.
15.Remove the glass stopper from the door frame.
16.Slide the front door glass left and then slide upwards
to release the tabs holding it.
17.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 lower edge of the front door glass into the six
(6) tabs of the door frame.
2) Slide the front door glass upwards and insert the upper
edge of the front door glass into the five (5) tabs of the
door frame.
3) Slide the front door glass righ and insert the right
edge of the front door glass into the two (2) tabs of the
door frame.
2. Re-install the glass stopper to 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.
4. Re-install door panel to door frame by fitting seven (7)
tabs of door frame to seven (7) holes of door panel.
5. Hold the door panel to the door frame with four (4)
Putty Knife
Door Frame
Choke Cover