Lid Switch Assembly; Varistor (Mov-Metal Oxide Varistor); To Remove Transformer - Maytag LAT2300 Service Manual

seen. With volt meter connected
across terminals, PK and PK, 22.6
volts AC should be seen. If not,
suspect transformer or power
supply.
Note: These voltages may vary
slightly.
To Remove Transformer:
1. Disconnect washer from power
supply.
2. Remove the two inside screws on
the control panel and tilt forward.
The transformer is located in the
right hand corner of the console.
3. Remove wires from transformer or
the edgeboard connector from
microprocessor board.
4. Remove the two screws securing
transformer to top cover.
Voltage readings suspicious; check
power supply or replace transformer.
Varistor (Mov-Metal Oxide Varistor)
The varistor is designed to protect the
microprocessor board from excessive
voltage. At normal line voltage, the
varistor shows extremely high resist-
ance. When the line voltage exceeds
the threshold of the varistor, its resist-
ance decreases to a point of providing a
voltage bleed-off path. This will prevent
line voltage surges or "spikes" from
reaching the microprocessor board.
The varistor is actually part of the trans-
former. It is connected across the
primary input terminals to suppress line
voltage surges. If visual inspection
shows a damaged varistor, the trans-
former should be replaced.
LID SWITCH ASSEMBLY
Timer Models
In order for the washer to agitate, spin
or fill the lid switch assembly must be
operating properly. The assembly con-
sists of a lid switch, check switch and
fuse holder mounted on a bracket. The
switches are actuated through the
plunger mechanism when the lid is
opened and closed.
The purpose of the circuity is to open
the fuse in the event the lid switch fails.
The fuse is in series with the water
valve and will prevent the washer from
filling with water if it is open. Normal
washer operation is resumed only by
servicing the lid switch and fuse
assembly.
16001145 SECTION 3. WASHER - SERVICE PROCEDURES
3-14
©1994 Maytag Corporation