Contrex ML-TRIM Bedienungsanleitung PDF herunterladen (Seite 118)

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PROM CHIP REPLACEMENT

The PROM (Programmable Read Only Memory) chip is the software for the ML–Trim.

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 ML–Trim.

• 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 “7” key, then continue to press the keys while

you apply power to the ML–Trim. The “Clear 7” procedure restores the

factory default settings and automatically performs the Power Up diagnostic

routines.

• Reenter your Code Parameters values.

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Contrex ML-TRIM Bedienungsanleitung Seite 118