5-5 High Voltage Diode
1. Isolate the diode from the circuit by disconnecting its leads.
2. With the ohm-meter set at the highest resistance scale, measure across the diode terminals.
Reverse the meter leads and read the resistance. A meter with 6V, 9V or higher voltage
batteries should be used to check the front-to back resistance of the diode (otherwise an infinite
resistance may be read in both directions). The resistance of a normal diode will be infinite in one
direction and several hundred K
in the other direction.
5-6 Main Relay and Power Control Relay
1. The relays are located on the PCB Ass’y. Isolate them from the main circuit by disconnecting the leads.
2. Operate the microwave oven with a water load in the oven. Set the power level to high.
3. Check continuity between terminals of the relays after Start pad is pressed.
5-7 Adjustment of Primary, Door Sensing and Monitor Switch
1. When mounting Primary switch and Interlock
Monitor switch to Latch Body, consult the figure.
NOTE : No specific adjustment during installation
of Primary switch and Monitor switch to the
latch body is necessary.
2. When mounting the Latch Body to the oven
assembly, adjust the Latch Body by moving it so
that the oven door will not have any play in it.
Check for play in the door by pulling the door
assembly. Make sure that the latch keys move
smoothly after adjustment is completed.
Completely tighten the screws holding the Latch
Body to the oven assembly.
3. Reconnect to Monitor switch and check the
continuity of the monitor circuit and all latch
switches again by following the components test
procedures.
4. Confirm that the gap between the switch housing
and the switch actuator is no more than 0.5mm
when door is closed.
5. Interlock Switch Replacement - When
replacing faulty switches, be sure switch mounting
tabs are not bent, broken or otherwise deficient in
their ability to secure the switches in place.
Precaution
For continued protection against radiation hazard,
replace parts in accordance with the wiring diagram
and be sure to use the correct part number for the
following switches: Primary and door sensing switches,
and the interlock monitor switch (replace all together).
Then follow the adjustment procedures below. After
repair and adjustment, be sure to check the continuity
of all interlock switches and the interlock monitor
switch.
Door Open Door Closed
Primary S/W
Monitor S/W(COM-NC)
Monitor S/W(COM-NO)
Door Sensing S/W
0
0
0
0
Primary S/W
Interlock Monitor S/W
Door Sensing S/W
BLU
BRN
WHT
WHT
ORG
ORG
PINK/PINK
RED/YEL
BRN/ORG
BRN
BRN/AZR
RED/WHT
Latch-Body
Door Sensing S/W
Lever-Switch/U
Interlock Monitor S/W
Primary S/W
Lever-Switch/L
COM
NO
COM
NO
NO
NC
NO
COM
NO
NC
COM
COM
