Troubleshooting Procedures - Maytag ACO1520AB Service Manual

Troubleshooting Procedures

"PLEASE TOUCH TIME OF DAY"
does not appear in
when unit is plugged in.
Display does not
indicate correct number
pressed or correct
indication when
programmed.
Is continuity
indicated when
key pad is
pressed.
NO
Replace
key pad.
Unit operates.
©2002 Maytag Appliances Company
the display,
Measure voltage
between pin 1
and pin 3 of
CN1 connector
Is 120 volts
indicated.
NO
Verify proper
connection of
circuit board.
YES
control
1. Check power supply.
2. Check fuse.
3. Check oven thermostat.
YES
Replace
circuit
board.
Unit operates.
Measure resistance
of control key
panel after removing
ribbon connector.
Verify proper
connection of
ribbon
connector.
NO
Reconnect
ribbon connector
for proper
connection.
13
Key pad matrix is located in
"Testing Procedures" on page 11.
Does ribbon
connector have
proper
connection.
YES
Replace
circuit
board.
16021668 Rev. 0