Replacing The Filter - Agilent Technologies 6890 Series Service Manual

240 Programmed Temperature Vaporization Inlet (PTV)
Replacement procedures
3. Once the PTV manifold is removed, remove the two mounting screws that
secure the thermocouple conversion board onto the pneumatics board,
and remove the board.
Figure 240-17
4. Replace the board and reassemble in reverse order.
5. Check the system for leaks.

Replacing the filter

1. Turn off the GC oven and the inlet and allow them to cool.
2. Set all GC flows to zero.
3. Remove the pneumatics cover.
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Replacing the PTV thermocouple PCB
Inlets
Agilent 6890 Gas Chromatograph Service Manual
PTV manifold assembly
PTV thermocouple PCB
Remove
2 screws
Jun 2001