Bay Technical Associates V79 PDI-1 - Manual (Page 38)

34
A P P E N D I X B A P P E N D I X B
E P R O M U P G R A D E E P R O M U P G R A D E
You will receive one EPROM (chip with label) for each PDI module to be
upgraded. 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 from the unit by depressing the power
switch on the front of the unit to OFF. Also remove power cord from the
AC outlet.
2. Remove the appropriate module by loosening the 2 straight slot screws
that attach the connector board I/O module to the chassis and then pulling
the module out.
3. Refer to the appropriate mechanical layout (see Appendix C or Appendix
D). Locate socket U8 for the PDI-1 or U5 for the PDI-2. Remove
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.
4. Install new EPROM into the appropriate socket. (Make certain you are
installing the correct EPROM into the correct module by referring to the
label on the EPROM). The EPROM is notched; the notch on the EPROM
should line up with the notch on the socket. When installing the new
chips, be careful not to bend any of the pins.
5. Re-install the module(s) and apply power to the unit. The upgrade is now
complete.
Before you begin operations, check the configuration status to make certain it
matches your application. If configuration changes (baud rates, handshaking, etc.)
are required, you must make these changes in the configuration mode. See
Section 5 for complete instructions.