Samsung CE935 Alignment and Adjustments

Samsung Electronics

5. Alignment and Adjustments

5-1 High Voltage Transformer

5-2 Magnetron

5-1

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

2. Normal resistance readings are as follows:

(Room temperature = 20ûC)

1. Continuity checks can indicate only 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 magnetron case should read open.

PRECAUTION

1. High voltage is present at the high voltage terminals 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

Primary
Terminals

MODEL

SHV-945EG1

Secondary 103.0Ω ¡ 10%

Filament Shows Continuity
Primary 1.6Ω ¡ 10%

Cooling Fins

Gasket Plate

Magnetron Antenna

Samsung Electronics

5-3 High Voltage Capacitor

5-4 High Voltage Diode

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

5-2

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

2. Once the capacitor is charged, a normal capacitor shows continuity for a short time, and then indicates 9MΩ.

3. A shorted capacitor will show continuous continuity.

4. An open capacitor will show constant 9MΩ.

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

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 KΩ in

the other direction.

1. When mounting Primary switch and Interlock
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 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.

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 switche, 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

Door Open Door Closed

Primary switch ∞ 0
Monitor switch (COM-NC) 0 ∞

Secondary switch

∞

0

Primary Interlock Switch

Lever Switch

Body Latch

Secondary Switch

Interlock Monitor
Switch