Agilent Technologies 6890 Series Service Manual page 260

Nitrogen Phosphorus Detector (NPD) 320
Replacement procedures
Ribbon cable connector
Bead drive cable connector
Figure 320-17 Location of NPD interface board connectors
4. Pull the NPD board directly out from the instrument.
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Detectors
Jun 2001
Agilent 6890 Gas Chromatograph Service Manual