CONTREX MLP-Drive - Manual (Page 146)

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PROM CHIP REPLACEMENT
The PROM (Programmable Read Only Memory) chip is the software for the MLP-Drive.
See Figure 4-5 for the PROM's location on the CPU Board.
To replace the PROM 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 MLP-Drive.
• Remove the back panel.
• Pull out the CPU board.
• Ground yourself - Static electricity can damage the PROM.
• Locate the PROM chip and carefully pry the PROM from the socket.
Alternate between the two corners, as noted in figure 4-5.
• Carefully install the replacement PROM in the socket by lining up the
beveled corner of the PROM chip with the beveled corner of the socket.
Apply even pressure until the PROM is seated.
NOTE: Incorrect placement can damage the PROM.
• Replace the CPU board.
• Replace the back panel.
• Press the “Clear” key and the “7” key, then continue to press the keys while
you apply power to the MLP-Drive. The “Clear 7” procedure restores the
factory default settings and automatically performs the Power Up diagnostic
routines.
• Reenter the values for your Code Parameters.