CONTROL PANEL ASSEMBLY AND CPU UNIT REMOVAL
The complete control panel should be removed for re-
placement of components except the relay unit.
To remove the control panel, proceed as follows:
1, Disconnect oven from power supply and remove
outer case.
2. Discharge the high voltage capacitor.
3. Disconnect the wire connectors and wire leads from
the relay unit and CPU unit.
4. Disconnect a connector from the CPU unit.
5. Remove one (I ) screw holding the control panel
back plate to the chassis support.
6. Remove the two (2) screws holding the bottom
edge of the back plate to the cabinet base.
7. Remove one (I) screw holding the back plate to the
oven cavity flange.
Replacement of individual component is as follows:
CPU UNIT AND KEY UNIT
I, Disconnect the wire connector of CPU unit from the
relay unit.
2. Remove the four (4) screws holding the panel
frame to the back plate.
3. Separate the panel frame and back plate.
4. Remove the three (3) screws holding the CPU unit
to the panel frame.
5. Lift up the control unit and disconnect the key
connector from the CPU unit.
6. Now, the CPU unit and frame assembly are sepa-
8. Lift up and pull the control panel forward. rated.
UPPER LATCH/LOWER LATCH/STOP SWITCHES
AND MONITOR SWITCH ADJUSTMENT
If the upper latch,lower latch switches stop switch and
monitor switch do not operate properly due to a
mis-adjustment, the following adjustment should be
1. Loosen the one (1) screw holding the upper Jatch
book to the oven cavity front flange and the one (1)
made.
screw holding the lower latch hook to the same
flange.
2. With the door closed, adjust the lower latch book
by moving it back and forth and then adjust the
upper latch hook by moving it back and forth, or
up and down.
In and out play of the door allowed
by the upper and lower latch hooks should be less
than 0.5 mm. The vertical position of the upper
latch hook should be placed where the upper latch
switch and monitor switch have activated with the
door closed. Vertical adjustment of the lower latch
book is not possible.
3. Secure the screws with washers firmly.
4. Now, make sure of the upper latch switch opera-
tion. If the upper latch switch has not, activated with
the door closed, loose the one (1) screw holding
the upper latch book to the oven cavity front flange
and adjust the upper latch hook position.
After the adjustment, make sure of the following:
1. The in and out play of the door remains less than
0.5 mm at latched position. First check the upper
latch hook position, pushing and pulling the upper
portion of door toward the oven face. Then check
the lower latch hook position, pushing and pulling
the lower portion of door toward the oven face.
Both results (plays of the door) should be less than
0.5mm.
2. The upper latch and lower latch switches interrupt
the circuit before the door can be opened.
4. Re-install the outer case and check for microwave
3. The monitor switch contacts close when the door
leakage around the door with an approved micro-
wave survey meter. (Refer to Microwave Measure-
ment Procedure.)
is opened.
Figure C-l. Latch Switches Adjustment
(RDAl203U)
33
