Testing Pn Key Pad; Testing Transformer Mfr18 & 25 - Maytag MFR Series Service Manual

Disconnect power before servicing.
Replace all parts and panels before operating.
Failure to do so can result in death or electrical shock.

TeSTinG pn key paD

To test a particular button, find the point on the
Matrix that is just below and left of the letter
associated with the button. Then follow the
intersected line up as well as left to get the 2
numeric points on the ribbon connector that
will need to be Ohm tested.
Through
9
1
Electrical Shock Hazard
TeSTinG TRanSFORMeR
The Transformer is located next to the
contactor in the control tray. The transformer
is used to power the control board. The
transformer has three secondary windings,
target voltage at proper line voltage should be
within 10%.
1. Unplug washer or disconnect power.
2. Set the ohmmeter to the R X 1 scale.
Set digital ohmmeters to lowest scale.
3. Touch the ohmmeter test leads to the
primary winding. The meter should
indicate 3.8 Ω.
4. Touch the ohmmeter test leads to the
secondary winding. The meter should
indicated 22.4 Ω.
7-17
MFR18 & 25