Checking The Transformer - Maytag LAT2300 Service Manual

The secondary side of the transformer
has three windings that are connected
to the microprocessor board through
edgeboard connector CC (see sche-
matic).
CAUTION - - - - - - - - - - - - ,
Always disconnect power supply
before making continuity checks or
taking resistance readings.
MOUNTING PLATE
AND RELAYS
To Remove Relays:
The relays are located in the left hand
corner of the washer behind the control
panel. The three relays are mounted on
a plate that is attached to the washer
top.
1. Disconnect washer from power
supply.
2. Remove two inside screws on
control panel and tilt forward.
3. Remove the two screws securing the
mounting plate to washer top.
4. Reversing relay is secured to
mounti ng plate with a screw and
locating tab. Remove screw and
remove reversing relay.
5.
Fast and Slow relays can now be
removed by sliding tabs out of slots.
6. Remove wires from relays
Transformer
The transformer is a step-down trans-
former that is used to transform the
incoming line voltage to different values
for use by the microprocessor board.
Checking The Transformer:
1. Disconnect washer from power
supply.
2. Primary side. Remove the two
wires, R-SK and SR, from the trans-
former and check for continuity. No
continuity, replace transformer.
3. Secondary side. Remove the wires
from individual winding and make
conti nuity check. Check across
Y-SK and Y-SK, no continuity,
replace transformer. Check across
W-OR and W-OR, no continuity,
replace transformer. Check across
PK and PK, no continuity, replace
transformer.
CAUTION - - - - - - - - - ,
Use extreme care when checking
voltage.
4. Primary side. With volt meter con-
nected across terminals, R-SK and
SR, check for line voltage (120 volts
AC). No voltage, suspect power
supply.
5. Secondary side (3 windings). With
volt meter connected across termi-
nals, Y-SK and Y-SK, 20.7 volts AC
should be seen. With volt meter
connected across terminals, W-OR
and W-OR, 3.8 volts AC should be
16001145
SECTION 3. WASHER - SERVICE PROCEDURES
3-13
©1994 Maytag Corporation