Samsung M736, M736-AMF Alignment and Adjustments

5-1 High Voltage Transformer

1. Remove connectors from the transformer terminals
and check continuity.

2. Normal resistance readings should be as follows:

Secondary ..........................Approx. 131.5W

Filament .............................Approx. 0W

Primary...............................Approx. 2.29W

(Room temperature = 20ûC)

5-2 Magnetron

1. Continuity checks can only indicate an open filament or a
shorted magnetron. To diagnose an open filament or
shorted magnetron.

2. Isolate the magnetron from the circuit by disconnecting its
leads.

3. A continuity check across the magnetron filament
terminals should indicate one ohm or less.

4. A continuity check between each filament terminal and the
magnetron case should read "open".

Magnetron Antenna

Gasket Plate

Cooling Fins

5. Alignment and Adjustments

Samsung Electronics 5-1

PRECAUTION

1. High voltage is present at the high voltage terminal of the high voltage transformer during any cook cycle.

2. It is neither necessary nor advisable to attempt measurement of the high voltage.

3. Before touching any oven components, or wiring, always unplug the oven from its power source and discharge the high voltage
capacitor.

Filament Terminals

Secondary Terminal

Primary
Terminals

5-5 Adjustment of Primary Switch, Secondary Swithc and Monitor Switch

1. When mounting Primary switch and Interlock Monitor
switch to Latch Body, consult the figure below.

2. NOTE: 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 to the Latch Body by moving it so that the oven
door will not have any play. 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.

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 0.5mm when door
is closed.

5-2 Samsung Electronics

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 secondary interlock switches and the interlock monitor switch 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

5-3 High Voltage Capacitor

1. Check continuity of the capacitor with meter set at the highest ohm scale.

2. Once the capacitor is charged, a normal capacitor shows continuity for a short time, and then indicates
10MW.

3. A shorted capacitor will show continuous continuity.

4. An open capacitor will show constant 10MW.

5. Resistance between each terminal and chassis should read infinite.

5-4 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 the resistance 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 KW in the
other direction.

Door Open Door Closed

Primary switch ¥ 0
Monitor switch (COM-NC) 0 ¥
Secondary S/W ¥ 0

Primary Interlock Switch

Lever Door

Body Latch

Secondary
Switch

Interlock Monitor
Switch