AML M3000 Guía de usuario descargar pdf (Pagina 130)

M3000 Portable Bar Code Reader User's Guide

12-2

EPROM Replacement

1. Disconnect any cables, scanning devices and power supplies from the M3000 portable.

2. Turn on the M3000. Press the EXIT key until the display shows:

Portable Mode

Select Function

and then shut the M3000 off.

NOTE: This is a very important step and will prevent loss of any data or programs

3. Turn the M3000 upside down and remove the four screws from the bottom of the case.

Return the M3000 back to the upright position.

4. Lift the top half of the M3000 case straight up until the four plastic posts have cleared

the circuit board. Next, fold the top of the case back until the keyboard is facing

downward.

NOTE: Do not disconnect the keyboard.

5. Carefully lift the circuit board up out of the M3000 lower case and fold it over on the

top part of the case that you removed earlier.

NOTE: The battery wires still connect the circuit board to the lower case - do not

disconnect the battery wires.

6. Locate the EPROM chip that has the white label on top. Using a small slot head

screwdriver - carefully pry the chip from the socket.

Dimple on This

End of EPROM

M3000 EPROM Alignment

7. Take the new version EPROM chip and insert it into the socket with the dimple in the end of

the chip facing the outer edge of the circuit board. If the pins of the chip do not line up with

the socket, you may need to bend the chip's pins slightly to align them with the the socket.

Press the EPROM chip firmly into place.

NOTE: Sometimes if the pins are not aligned correctly, the pins will bend out or

in, and will not make proper contact with the socket.

8. Verify that all EPROM pins are inserted into the socket

9. Carefully re-assemble the M3000 portable unit making sure that the battery cables do not

get pinched between the circuit board and the battery compartment.

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AML M3000 Guía de usuario Pagina 130