Maytag RFS12MPS Service Manual download pdf (Page 22)

WARNI NG

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

before servicing, unless testing requires it.

Illustration Component Testing Results

Thermal cutout Disconnect all wires from TCO.

Measure resistance across terminals.

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

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

Closed at 32

qF (0qC) and

Opens at 230

qF (110qC)

Closed at 140

qF (60qC) and

Opens at 320

qF (160qC)

Diode

Discharge Capacitor

Remove diode lead from capacitor and

connect ohmmeter.

Reverse leads for second test.

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.

Capacitor

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.

Between Terminals: Meter should

momentarily deflect towards zero

then return to over 5 M

:. If no

deflection occurs, or if continuous

deflection occurs, replace capacitor.

Terminal to Case: Infinite resistance

Magnetron

Discharge Capacitor

Remove wires from magnetron and

connect ohmmeter to terminals. Also

check between each terminal and

ground.

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.

Blower motor Remove all wires from motor.

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

Approximately 28 – 35

Stirrer motor Remove all wires from motor.

Measure resistance across terminals.....

Approximately 12 – 14 K

Filament

Secondary

Primary

Transformer

Discharge Capacitor

Remove all wires from terminals.

Measure resistance from:

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

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

Secondary to Ground screw on

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

Less than <1

Approximately 90-100

Noise filter board Power In terminals ..................................

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

120 VAC (RFS12)

If no power in, check power outlet.

If no power out, check fuses.

Circuit Protector Measure resistance across terminals.....

Between Terminals: Less than 1

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

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

240 VAC (RFS18)

Component Testing Procedures

2011 RFS Training Manual.indd 20 10/3/2011 8:36:45 AM

1 2 ... 17 18 19 20 21 22 23 24 25 26 27 ... 37 38

Comments to this Manuals

No comments

Maytag RFS12MPS Service Manual Page 22

Comments to this Manuals

Related products and manuals for Microwaves Maytag RFS12MPS