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C4 Manual Rev 7.5.2
3.2.1 Upgrading Firmware by PROM Replacement
Before starting, be certain that you have a properly grounded antistatic
surface and a grounding strap to prevent damaging the C4 components
during disassembly and reassembly.
Remove the C4 from its cabinet or rack, then remove the EEPROM chip that
contains the firmware and replace it with a new one containing the updated
firmware. Firmware
EEPROMs are available
from Sigma Systems.
There is a charge for
firmware EEPROMs.
The firmware EEPROM
is located on the digital or
“A” board, the same board
that has the EIA-232 and
GPIB connectors on the
end. The location of the
firmware EEPROM is
shown by the triangle
pointer. The EEPROM
socket is labeled U13. Make certain that the end of the EEPROM with the notch
or notch mark is toward the inside, or center, of the board.
Note that it is possible to remove and replace the firmware EEPROM without
disassembling the C4. If you lay the controller upside down, and look at the
digital board from the bottom, the firmware EEPROM is the first large chip from
the front of the controller. You will not be able to see the U13 label, but you can
see the C32 label on the small capacitor located next to the firmware EEPROM
socket. Using a small flat bladed screwdriver or chip removal tool, carefully pry
the old EEPROM from it’s socket. Try to keep the chip as flat as possible while
removing it to prevent damage to the pins or socket. When replacing, keep the
replacement EEPROM flat to the socket, make sure all pins are started in their
respective receivers in the socket, then press the chip firmly into place.
3.2.2 Upgrading Firmware by Uploading through C4 Serial Port
Note: CC-3.5 controllers with version 7.0.0 firmware or earlier have battery
backed RAMS for non volatile storage. These units MUST have the BBRAM
replaced with an EEPROM before newer firmware is installed.