CONTREX M-Traverse - Manual (Page 146)

4 - 19
EPROM CHIP REPLACEMENT
The EPROM (Erasable Programmable Read Only Memory) chip is the software for the
M–Traverse. See Figure 4-5 for the EPROM's location on the CPU Board.
To replace the EPROM chip:
• Make a record of your current Control Parameter values; the replacement
chip contains default values that will replace your current values when you
perform the Clear/7 step.
• Turn off the power to the M–Traverse.
• Ground yourself - Static electricity can damage the CPU board and the
EPROM chip.
• Remove the back panel.
• Pull out the CPU board.
• Locate the EPROM chip and note the orientation of the Pin 1 Indicator.
• Carefully pry the EPROM that is being replaced from the socket.
• Carefully install the replacement EPROM in the socket, using the Pin 1
Indicator for correct placement. Be careful not to bend the EPROM pins.
NOTE: Incorrect placement can damage the EPROM.
• Replace the CPU board.
• Replace the back panel.
• Press “Clear” and “7” and apply power to the M–Traverse simultaneously.
• The M–Traverse restores the factory default settings and automatically
performs the Power Up diagnostic routines.
• Reenter your Code Parameters values.