Maytag MAT12PDSA Technical Information page 15

Component Testing Procedures
To avoid risk of electrical shock, personal injury or death; disconnect power to washer before servicing, unless
testing requires power.
Will not respond
to handheld PDA
No response to
coin 1
December 2003
!
WARNING
Does PDA
respond to other Yes
machines?
No
PDA has failed.
Is display blank? No
Yes
See blank display
section in trouble
shooting guide
Check lighting. Too
much ambient light in
the coin drop will cause No
coins not to be
recognized.
If problem still
exists replace first
coin optic sensor
Check optic
window for
obstructions, dirt,
or scratches.
If problem still
exists replace
control board
Is coin slide option
selected?
No
Check the coin
mechanism for
proper adjustment.
Check wiring and
termination between first
coin drop and control
board
Unplug washer and check
resistance between the
red wire and the white
wire in connector
AA4. Is resistance
greater than 10K ohms?
15
Timings for the coin
slide mode will cause
Yes coins to not be
recognized. Deselect
the coin slide mode.
Reconnect
Yes connector and
plug in washer
If problem still
exist replace
control board
16022846 Rev 0