Agilent Technologies 6890 Series Service Manual page 281

330 Thermal Conductivity Detector (TCD)
Replacement procedures
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Tighten the gang fitting screw firmly to compress the O-rings.
Figure 330-14
5. If replacing a Type 1 manifold, feed the 3-way switching valve cable
through the chassis to the detector interface board. Connect it to the top
edge of the board. The connector only goes on one way.
If replacing a Type 2 manifold, connect the switching valve wires to the
existing cable.
6. Route the ribbon cable behind the manifold assembly as shown in
Figure 330-15. Then, slide the manifold and bracket assembly into the
slot until the bracket seats flush against the end of the rails. See
Figure 330-16.
18 of 24
If replacing a Type 2 manifold, the TCD adapter weldment should
not be needed.
Be sure the left tube clears the inner edge of the bracket. See
Figure 330-16.
Be sure all O-rings are in place.
Be sure that the hole patterns between the mating pieces are aligned.
Installing the TCD adapter weldment
Detectors
Agilent 6890 Gas Chromatograph Service Manual
TCD adapter weldment
Jun 2001