Introduction
Included with these instructions is a 28 pin EPROM for updating an XE validator. These instructions will detail
the disassembly of the validator, replacement of the EPROM and re-assembly. Before attempting the installation,
please read through all the instructions carefully to see if you feel comfortable performing
the steps required. If you are not comfortable working on electrical equipment where serious shock
hazards exist, you should contact Changemaker Corp to perform the installation for you.
Tools Required
#2 phillips screwdriver
Small flat blade screwdriver
Small needle-nose pliers
Preliminary Testing
1. Before beginning this update, confirm that the validator is functioning properly and is accepting the
old currency well. If not, you should have the validator serviced by a qualified technician.
2. If the validator is working properly, be certain all electrical power to the changer or Autocashier has
been turned off before commencing disassembly and reassembly. Failure to do so may cause injury
or death. Then remove the validator and proceed with disassembly.
Disassembly
1. Stand the validator upright on a solid work surface to perform the following steps.
2. Remove the 6-32 x 1/8 screw from the top of the validator as shown in Figure 1.
WARNING! Shock Hazard! DO NOT connect power or operate the
validator with the covers removed.
3. Set the validator on its side with the display and DIP switch facing up. Then remove the two 6-32 x
1/8 flathead screws as shown in Figure 1.
4. Carefully lift off the side/rear cover. Slide the 9-pin connector out of the cutout in the cover and set
the cover aside. Remove the small cardboard insulator from around the display and DIP switch and
set it aside also.
5. Stand the validator upright again. Refer to Figures 2 and 5 for the next four steps.
6. Pull up slightly on the large cardboard insulator and remove it. Set it aside to be re-installed later.
7. Remove the two #4-40 x 1/4 screws that hold the board.
8. Remove the two connectors at P2 and P3. It may be necessary to use a small flat blade screwdriver
to pry the connectors loose before they can be pulled off.
9. Lift up on the right side of the circuit board and swing it toward you. Then disengage the bottom left
corner from the frame.
10. Remove the sensor cable at connector P1 and separate the circuit board from the validator.
EPROM Removal
1. Refer to Figure 3 and locate the EPROM at U1 on the circuit board.
2. Using a small flat blade screwdriver carefully pry the old EPROM out of its socket. Note that the
socket pins may be attached to a thin piece of plastic. When prying out the EPROM be sure and
place the screwdriver between the bottom of the EPROM and the top of the plastic. Do not try to
pry up from underneath this plastic film.
EPROM Installation
Note: When installing the new EPROM it is very important that it be
inserted with the notched end in the correct location, and that all 28
pins are properly seated.
1. The pins on the new EPROM may be bent out at an angle as shown in Figure 4.
Do not try to install the EPROM without first bending the pins inward, or the pins may be damaged. Lay the EPROM
on its side on a hard flat surface as shown, and carefully roll it toward the pins to bend the lower
pins into line. Then turn it over and bend the pins on the other side in the same manner.
2. Locate the small notch at one end of the EPROM in Figure 5, A.
Make sure it is lined up with the notch of the socket outline at U1 on the circuit board, as shown in Figure 5, B.
Also make sure that all the pins are started into the socket. Then press the EPROM firmly into the socket.
3. Inspect all 28 pins to be sure they are seated properly. Note that a pin can become bent under the
EPROM and may appear as though it is correctly installed in the socket. If all the pins were not
properly seated in the socket, remove the EPROM, straighten the pins with needle-nose pliers, and
try again. Remember that the notched end must be as shown in Figure 5.
Re-assembly
1. Install the sensor cable connector at P1. Note that this connector can be easily mis-plugged, so be
sure all the pins are covered by the connector shell.
2. Swing the right side of the circuit board toward the validator frame and drop it down into place. Be
sure to tuck the sensor cable down between the transformer and the front cover so that no wires
become pinched.
3. Install the cables at connectors P2 and P3.
4. Install two #4-40 x 1/4 screws in board.
5. Place the large cardboard insulator over the display circuit board and insert the tabs at the bottom
between the main circuit board and the validator frame.
6. Lay the validator over on its side with the display and DIP switch facing up.
7. Place the small cardboard insulator over the DIP switch and display.
8. Lower the side/rear cover over the validator and slide the grooves of the 9-pin connector shell into
the cutout on the rear cover.
9. Snap the side/rear cover into place as it interlocks with the other side/front cover.
10. Install the two 6-32 x 1/8 flathead screws removed earlier, as shown in Figure 1.
11. Stand the validator upright.
12. Install the remaining 6-32 x 1/8 screws as shown in Figure 1.
Final Checkout
1. Once again, be certain all electrical power to the changer or Autocashier has been turned
off. Failure to do so may cause injury or death. Then re-install the validator in its mounting
bracket.
2. Be sure the 9-pin harness connector at the rear of the validator is securely seated.
3. Before you apply power, position yourself so that you can observe the display on the side of the
validator.
4. Apply power and you should observe a decimal point or other character flashing on the display
within five seconds. If you dont see anything on the display, or the display is not flashing, remove
power immediately and proceed to troubleshooting.
5. If you do see a flashing decimal point on the display, the validator is ready to accept currency. Try
inserting a few bills to be sure the validator is working properly.
6. This completes the update process. Your validator should now be capable of accepting both the old
and new currency.
Troubleshooting
Follow this troubleshooting chart if your validator did not power up correctly during final checkout.
Display is blank
9-pin harness is not connected
Power is not on
Connector P3 not installed
EPROM is installed incorrectly. Backwards or pin bent.
Display has random segments lit.
EPROM is installed incorrectly. Backwards or pin bent.
Display flashes ½ of 1
Validator is inhibited. Changer is Out-of-Service
Connector P2 not installed
Display flashes 1.5
Connector P1 not installed or mis-plugged
Display shows a J
Connector P1 is mis-plugged
Does not accept new
bills
Will only accept new bills if inserted black seal first
For any other symptom or error code, consult your validator operation manual. For additional assistance
contact:
Changemaker Corp.
6342 Forest Hill Blvd, Suite 110
Greenacres, Florida 33415
Telephone: (561)471-1008
Toll Free: 1-800-637-5154
