Maytag MAT12PDSA - Control Board

Component Testing Procedures
!
WARNING
To avoid risk of electrical shock, personal injury or death; disconnect power to washer before servicing, unless
testing requires power.
December 2003 16022846 Rev 0
5
Control Board
AA4 AA7AA6 AA3
AA5
AA2
AA1 EE1
Connector-
Pin
Wire Color Description Connector-
Pin
Wire Color Description
Service and Vault Switch
Coin Sensor #2
AA1-1 Black Vault Switch AA5-1 Blue Anode coin #1 L.E.D.
AA1-2 Yellow Service switch AA5-2 Red Collector Photo transistor
AA1-3 Orange Common (AA1-1 to AA1-2) AA5-3 White Emitter Photo transistor
AA5-4 White/Blue Cathode L.E.D.
Relays
AA2-1 -- --
AA2-2 -- --
Board Power Source
AA2-3 -- -- AA6-1 -- Center Tap
AA2-4 -- -- AA6-2 -- 5.3 VAC (AA6-2 to AA6-5)
AA2-5 Purple 24 VDC Reversing Relay AA6-3 -- 22.5 VAC (AA6-3 to AA6-6)
AA2-6 -- -- AA6-4 -- --
AA2-7 -- -- AA6-5 -- 5.3 VAC (AA6-5 to AA6-2)
AA2-8 -- -- AA6-6 -- 22.5 VAC (AA6-6 to AA6-3)
AA2-9 -- -- --
AA2-10 Pink Power for off board relay
Power and Main Components
AA7-1 -- --
Debit Card Connections
AA7-2 Grey #20 120 Line/ Lid Switch
AA3-1 -- Available 2 AA7-3 Orange Hot Water Valve Coil
AA3-2 -- Available 1 AA7-4 Brown #15 Pressure Switch
AA3-3 -- Enable 1 AA7-5 Red 120 Neutral
AA3-4 -- Enable 2 AA7-6 Black Motor Sense
AA3-5 -- Debit Power AA7-7 Purple 24 VDC Motor Relay1
AA3-6 -- Debit Ground AA7-8 Blue Cold Water Valve Coil
Coin Sensor #1 Battery
AA4-1 Blue Anode coin #1 L.E.D. EE1-1
+
Positive Side
AA4-2 Red Collector Photo transistor EE1-2
--
AA4-3 White Emitter Photo transistor EE1-3 --
AA4-4 White/Blue Cathode L.E.D. EE1-4
−
Negative Side