Danger MFS12TS Informations techniques - Page 2

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Component Testing Procedures

To avoid risk of electrical shock, personal injury or death, disconnect power to oven and discharge capacitor

before servicing, unless testing requires it.

Illustration

Thermal cutout

Diode

Capacitor

Magnetron

Blower motor

Stirrer motor

Transformer

Secondary

Filament

Primary

Noise filter board

Circuit Protector

16500023

WARNING

Component

Disconnect all wires from TCO.

Measure resistance across terminals.

Cavity TCO ...........................................

Magnetron TCO ....................................

Discharge Capacitor

Remove diode lead from capacitor and

connect ohmmeter.

Reverse leads for second test.

Discharge Capacitor

Remove wires from capacitor terminals

and connect ohmmeter, set on highest

resistance scale to terminals.

Also check between each terminal and

capacitor case.

Discharge Capacitor

Remove wires from magnetron and

connect ohmmeter to terminals. Also

check between each terminal and

ground.

Remove all wires from motor.

Measure resistance across coil .............

Remove all wires from motor.

Measure resistance across terminals ....

Discharge Capacitor

Remove all wires from terminals.

Measure resistance from:

Primary ................................................

Filament ...............................................

Secondary to Ground screw on

transformer stack .................................

Power In terminals ................................

Power Out terminals..............................

Measure resistance across terminals ....

Testing

Opens at 230

Closed at 140

Infinite resistance should be

measured in one direction and 50K

or more in the opposite direction.

NOTE: Ohmmeter must contain a

battery of 6 volts minimum.

Between Terminals: Meter should

momentarily deflect towards zero

then return to over 5 M

deflection occurs, or if continuous

deflection occurs, replace capacitor.

Terminal to Case: Infinite resistance

Between Terminals: Less than 1

Each terminal to ground measures

Infinite resistance.

Note: This test is not conclusive. If

oven does not heat and all other

components test good replace the

magnetron and retest.

Approximately 28 – 35

Approximately 12 – 14 K

Less than <1

Approximately 90-100

120 VAC

If no power in, check power outlet.

If no power out, check fuses.

Between Terminals: Less than 1

Results

F (110

F (60

C) and

Opens at 320

F (160

. If no

Ω

October 2013

Ω