Main Control Board; Main Control Board Strip Circuit; Main Control Board Removal - GE GFDR485GF Technical Service Manual

Main Control Board

Operating Voltage: 120 VAC
See Main Control Board Location on page 16.
The main control board is two electronic boards
connected together by a wire spline and mounted in
a plastic housing. The front board is the User Inter-
face (UI) board and the rear board is the Machine
Control board.
When the main control board is replaced, the new
board MUST be programmed with a model ID code.
The model ID consists of the "User Interface Mode
Type" and the "Heater Type".
The User Interface Mode Type is a number currently
between 0 and 3. The Heater Type will be either an
"E" for electric or a "g" for gas. Follow the instruc-
tions below to program the board.
When the main control board has been replaced, it
may sometimes power up with all of the LED's blink-
ing. If this is the case, follow only steps 5 through
10 below. Otherwise, follow all of the steps from the
beginning.
Main Control Board Model ID Programming
1. Begin with the dryer in Idle Mode (all LED's on
2. Press the following key sequence to enter Ser-
vice Mode: My Cycle --> Delay Dry --> My Cycle
--> Delay Dry.
NOTE: The sequence must be done in order. If
there are any other button presses or buttons
are pressed out of order, the sequence must be
started from the beginning.
3. Upon entering Service Mode, the control will be
in t1.
4. Press the Start/Pause button when "t1" is dis-
played.
5. Simultaneously press and hold both the Temp &
Level buttons for three seconds to prepare the
control for selecting the model.
6. Press the Level button to increase or press
the Temp button to decrease the Model Code
number selection until the correct number is
displayed, per the table on the right.
User Interface Mode Type Table
(See part instructions if model is not listed in table.)
GFMR295EF/GF
GFDS260EF/GF
GFDS265EF/GF
GFDR270EH/GH
GFDR275EH/GH
GHDS360EF/GF
GHDS365EF/GF
GFDR480EF/GF
GFDR485EF/GF
7. Press the Start/Pause button to temporarily
save the UI Model Code.
8. Next, the Heater Type selection is displayed as
"g" or Gas or "E" for Electric. Press the Temp or
Level to alternate the 7-segment display be-
tween the two Heater Type selections.
9. Press and hold the Start/Pause button for three
seconds to set the Heater Type. The board will
then return to an idle state and will exit Service
Mode. It could take up to 10 seconds for the
dryer to respond after exiting Service Mode.
10. The dryer is now ready for use.

Main Control Board Strip Circuit

High Limit
Thermostat
L1
Black
N
White

Main Control Board Removal

1. Disconnect power from the unit.
2. Remove the control panel.
See Control Panel Removal on page 20.
3. Disconnect the main control board wire har-
nesses.
4. Remove the six 5/16 in. hex main control board
screws and lift the board out.
22
0
1
1
1
1
2
2
3
3
J1-1
Black/Yellow
Main
Control
J1-2
Board