UMD V3 Installation Manual - Remote Control
13 November 2018
Page
24
of
39
APPENDIX A: Upgrading a Carrier ePROM Chip
1.
Start the unit and verify operation
2.
Disconnect the negative battery cable
3.
Locate the Micro-Processor Logic Board
a.
For Trailer Units
–
it will be located behind the key-pad & display module or inside the control
box
b.
For truck units it will be located inside the control box, on the door.
4.
Connect a wrist strap to your wrist and secure the clamp onto good ground such as the bare-metal
hinge holding the micro assembly in place or other non-painted metal area.
5.
Locate the ePROM, carefully cut and remove the tie-wrap, holding the ePROM in place.
6.
Note the orientation of the ePROM before removing it. There is a small notch in one end that will
match up with the notch in the outline of the chip on the board.
The new chip must be installed with
the notch in exactly the same position
. Using the removal tool (p/n 07-00297-00) remove the chip from
the board.
7.
Place the new small tie-wrap (inc in the Parts Kit) under the ePROM socket. Open the box and hold it
by both ends. Attach the installation tool (p/n 07-00298-00) on the ePROM while holding the tool with
your thumb on the silver pad (this allows the entire tool to be grounded through your hand). After
positioning the notch on the ePROM in the correct direction, carefully align the pins with the socket.
Gently push the ePROM into the socket until seated. Remove the insertion tool and closely inspect the
ePROM prongs where they entered the socket.
Make certain that all of the prongs are fully inserted
into the socket and that none were bent or pushed out of the way during the insertion process.
Secure
the ePROM in place with the tie-wrap and cut off excess length.
8.
For REV 3.32 only
–
place decal onto a visible location inside the control box.
9.
Secure the logic board back into place and close the control box door.
10.
Start the unit and verify operation.
Note: Adjustments to hour meters, Functional Parameters and Configurations are not necessary as these
settings are contained within the logic board itself and replacing the ePROM will not effect or change their
settings.
