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Gasboy 9800Q Series Diagnostic Manual User Manual

Page 65

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Replacement

Instructions

01/28/04

5-9

REPLACING THE RS-485 OR PUMP I/F PCB


1.

Disconnect the connector [1] from the RS-485 or Pump I/F PCB.


2.

Remove the two Phillips screws [2] from the RS-485 or Pump I/F PCB.


3.

Pull the RS-485 or Pump I/F PCB from the CPU PCB.


4.

Reverse Steps 1 through 3 to install the new RS-485 or Pump I/F PCB.



NOTE: Older units may have a 5-position cable from DC conduit. New pump and RS-485 PCBs
have a 4-position connector. When installing the new PCB, make sure that pin 1 of the cable (red
wire) matches up with pin 1 of the PCB connector.