Owner`s manual

106
APPENDIX D
EPROM UPGRADE INSTRUCTIONS
You will receive one EPROM (chip with label) with your upgrade kit.
Please see
Appendix D.1
if you are upgrading a PS-4A, PS-4C, or PS-
4E. If you are upgrading a PS-MIO, see
Appendix D.2
.
D.1 PS-4A, PS-4C, AND PS-4E
The materials you will need to supply are:
Phillips-head screwdriver
IC DIP extractor or a pair of curved needle-nose pliers
1.
IMPORTANT:
Remove power by unplugging the AC plug from the
AC outlet and DC plug from the
POWER
receptacle.
2. Remove the cover of the unit by first unscrewing the 2 screws
located on the front panel with the phillips-head screwdriver.
Next, remove the front panel and then slide the top panel off.
3. Refer to
Appendix E.1
for the mechanical layout. With the front of
the unit (LED side) facing towards you, locate socket
U2
. The
existing EPROM will have a label on it with the model number and
firmware revision indicated.
4. Remove the existing EPROM from the appropriate socket with IC
extractor or needle-nose pliers. Gradually loosen each side of the
chip, alternating pliers from side to side, so as not to bend chip
pins. Pull loosened EPROM all the way out.
5. Install the new EPROM into the appropriate socket. The EPROM
is notched; the notch on the EPROM will point towards the left of
the unit with the LEDs facing you. When installing the new chips,
be careful not to bend any of the pins. Also make sure all pins fit
their sockets.
6. Replace the cover; the upgrade is now complete.
D.2 PS-MIO