20
Samsung Electronics
5-5 High Voltage Diode
5-6 Main Relay and Power Control Relay
5-7 Adjustment of Primary, Door Sensing and Monitor Switch
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
Ω
in the
other direction.
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.
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.
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.
Alignment and Adjustments
COM
NO
COM
NO
NO
NC
NO
COM
NO
NC
COM
COM
Door Open Door Closed
Primary S/W
∞
0
Monitor S/W(COM-NC)
0
∞
Monitor S/W(COM-NO)
∞
0
Door Sensing S/W
∞
0
Primary S/W Interlock Monitor S/W Door Sensing S/W
RED/YEL
BRN
PINK/PINK
ORG
WHT
WHT
ORG
RED/WHT
BLU
BRN/AZR
BRN/ORG
BRN
Latch-Body
Door Sensing S/W
Lever-Switch/U
Interlock Monitor S/W
Primary S/W
Lever-Switch/L
