Maytag Neptune TL FAV6800A, Service

Page: 29 / 98

©2003 Maytag Appliances Company
16022808 Rev. 0 29
Troubleshooting Procedures
!
WARNING
To avoid risk of electrical shock, personal injury or death, disconnect power to unit before servicing, unless testing
requires power.
Titan LED Washer Control Board Inputs Table
Membrane Pad Continuity Checks
Unplug ribbon connector from display board. Touch probe of meter to the appropriate pin numbers listed in the chart.
Meter will show infinite unless the appropriate key is pressed.
Item
Description Voltage Input type Input to Where Comments
Water Valve
Thermistor 0 - 3.3 VDC Analog Input to Micro-
processor
Power Cord
Line 120 VAC Input to some relays
Neutral 120 VAC Input to some relays
Ground Chassis
ground
Lid Lock Switch
This switch senses if the lid is
locked 0 - 12 VDC Digital Input to Micro-
processor and safety
circuitry Closed when lid
is locked
Lid Closed Switch
This switch senses if the lid is
closed 0 - 12 VDC Digital Input to Micro-
processor and
system relay coil Closed when lid
is closed
User Interface Membrane switch key pad 0 - 12 VDC Digital Input to Micro-
processor Open when key
is not pressed
Tach from Variable
Speed Motor Control
Tach signal 0 - 12 VDC Digital Input to Micro-
processor and safety
circuitry
Pressure switch
Low water level 0 - 12 VDC Digital Input to Micro-
processor Closed when not
satisfied
Medium water level 0 - 12 VDC Digital Input to Micro-
processor Closed when not
satisfied
High water level 120 VAC Input to Micro-
processor and some
relays Closed when not
satisfied
Button Pin Number
Home 5 & 3
Favorites 6 & 3
Back 5 & 4
Off 5 & 7
Start/Pause 6 & 7
Help
6 & 4
Stain Brain 5 & 8
Cycle Library 6 & 8
Pin # 2