Diagraph PA/4000, Service Manual, Page: 177 / 213

Technician’s Guide 2-43
PROCEDURE FOR REPLACING THE STEPPER MOTOR (6105-050)
See Engineering Drawing #6105-101 to further illustrate this procedure .
1. Turn PA/4000’s power switch to the OFF position. Shut off the air valve on the
filter assembly.
2. Open the plastic Print Engine Cover (6105-040).
3. Open the Electrical Box assembly.
4. Cut the tie wraps holding the stepper motor cable to the other cables inside the
Electrical Box.
5. Remove the Stepper Motor connector from J9 on the Prodigy Plus board.
6. Carefully remove the Stepper Motor.
7. Reverse the previous steps to replace the Stepper Motor.
REPLACING THE FIRMWARE ON THE APPLICATOR BOARD
1. Turn the PA/4000’s power switch to the OFF position. Remove the power cord.
Disconnect all air hose and electrical connections.
2. Rotate PA/4000 to a comfortable working position.
3. Open the Electrical Box Assembly.
4. Locate the applicator board. (See Figure 2-7)
5. Remove the old EPROM from the U5 socket on the applicator board (See Figure 2-7)
using a small, flat blade screwdriver or EPROM remover.
U5
U4
Figure 2-7
Pay particular attention to the notch on the end of the old EPROM. This notch
tells you that pin one is the first pin to the left of the notch. The U5 socket on
the applicator board also has a notch. These two notches must be aligned for a
successful firmware installation.
6. Insert the new EPROM into the U5 socket. Press down with your thumb to secure
the EPROM.