R-27STM
17
CARRY OUT
3D
CHECKS.
Disconnect the leads from the control unit.
1.
Remove the one (1) screw holding the control panel to the
2.
front panel of the oven cavity.
Lift up the control panel assembly and release it from the
3.
oven cavity.
Now, the control panel assembly is free.
4.
Figure C-3(a) Power Supply Cord Replacement
Figure C-3(b) Power Supply Cord Replacement
CONTROL PANEL ASSEMBLY REMOVAL
N
L
Power Supply
Cord
Oven Cavity
Back Plate
Screw
Green/Yellow
Wire
Brown Wire
Blue
Wire
Noise Filter
W
H
T
R
E
D
P ower S upply
C ord
Oven C avity
B ack P late
S quare
Hole
Moulding
C ord S topper
1ST. LATCH SWITCH, 2ND. INTERLOCK RELAY CONTROL SWITCH AND MONITOR SWITCH REPLACEMENT
REMOVAL
CARRY OUT 3D CHECKS.
1.
Remove the control panel assembly, referring to section of
2.
CONTROL PANEL ASSEMBLY REMOVAL.
Disconnect wire leads from the switches.
3.
Remove two (2) screws holding latch hook to oven flange.
4.
Remove latch hook assembly from oven flange.
5.
Push outward on the two (2) retaining tabs holding switch in
6.
place.
Switch is now free.
7.
REINSTALL
Re -install each switch in its place. The 1st. latch switch and
1.
the monitor switch are in the lower position and the 2nd. in -
terlock relay control switch is in the upper position
Secure latch hook (with two (2) mounting screws) to oven
2.
flange.
Re -connect wire leads to each switch. Refer to pictorial dia -
3.
gram.
Reinstall the control panel assembly to the oven cavity.
4.
Reconnect wire leads to the control unit, referring to the pic -
5.
torial diagram.
Make sure that the monitor switch is operating properly and
6.
check continuity of the monitor circuit. Refer to chapter "Test
Procedure" and Adjustment procedure.
1ST. LATCH SWITCH, 2ND. INTERLOCK RELAY CONTROL SWITCH AND MONITOR SWITCH ADJUSTMENT
CARRY OUT
1.
3D
CHECKS.
If the 1st. latch switch, 2nd. interlock relay control switch and
2.
monitor switch do not operate properly due to a misadjust -
ment, the following adjustment should be made.
Loosen the two (2) screws holding latch hook to the oven
3.
cavity front flange.
With door closed, adjust latch hook by moving it back and
4.
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. latch 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.
Secure the screws with washers firmly.
5.
Check the operation of all switches. If each switch has not
6.
activated with the door closed, loosen screw and adjust the
latch hook position.
After adjustment, check the following.
In and out play of door remains less than 0.5mm when in the
1.
latched position. First check upper position of latch hook,
pushing and pulling upper portion of door 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.
When the door is open, the contacts of the 1st. latch switch
2.
and 2nd. interlock relay control switch open within 1.6mm
gap between right side of cavity face and the door.
Monitor switch contacts close when door is opened.
3.
Re-install outer case and check for microwave leakage
4.
around door with an approved microwave survey meter.
(Refer to Microwave Measurement Procedure.)
Latch Heads
Latch Hook
Door
2nd. Interlock Relay
Control Switch
1st. Latch Switch
Monitor Switch
Figure C-5. Latch Switch Adjustments
R27STM.indd 17
11/3/08 2:04:28 PM
