High Voltage Diode - Samsung DE7712N Service Manual

6. Alignment and Adjustments (continued)
6-4. High Voltage
1. Isolate the diode from the Inverter-P.C.B 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 serveral hundred Kin the other direction.
Power Control Relay, Lamp Relay and Fan Motor Relay
6-5.
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.
3. Check continuity between terminals of the relays after the start pad is pressed.
6-6. Adjustment of Primary Switch, Door Sensing Switch Monitor Switch
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 interlock and secondary interlock(door sensing),
and the 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 monitor switch.
1. When mounting Primary switch and Monitor switch
to Latch Body, consult the figure.
2. No specific adjustment during installation of Primary
switch and Monitor switch to the latch body is necessary.
3. 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 holding the
Latch Body to the oven assembly.
4. Reconnect to Monitor switch and check the continuity
of the monitor circuit and all latch switches again by
following the components test procedures.
5. Confirm that the gap between the switch housing and
the switch actuator is no more than 0.5 mm when door is
closed.
Diode
PRECAUTION
Primary switch
Monitor switch(COM-NC)
Door Sensing S/W
- 16 -
Door Open Door Closed
9
9
9