Agilent Technologies 6890 Series Service Manual page 204

Gas chromatograph

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Disconnect the ribbon cable for the module from the pneumatics board.

You may also have to remove the adjacent ribbon cable.

Use a Torx T-20 screwdriver to remove the screw from the top of the

module and slide the module out of the back of the GC.

Connect one end of the leak test ribbon cable (G1530-61370) to the ribbon

cable connector on the PCM and connect the other end to the appropriate

connector on the pneumatics board. Reconnect the gas supply and turn

on the main power switch. Set the pressure to 25 psi and the flow to 60

Lay the PCM on the lab bench and use an electronic leak detector to locate

the leaky component on the module.

Figure 270-3

If the leaky component is serviceable, such as a vent/inlet fitting (see the

diagram of serviceable parts, Figure 270-4), replace it. Otherwise, replace

Leak testing the

on the lab bench

Agilent 6890 Gas Chromatograph Service Manual

Pneumatics Control Module

Leak testing the PCM

Ribbon cable from leak test kit

Troubleshooting

6890a 6890 plus