HP 5890 SERIES II Service Manual page 93

18. Loosen the screws securing the clamps holding
the interconnect in place.
The following steps require protection against ESD (Electro- Static Discharge).
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Use a grounded wrist strap (part no. 9300- 0969 - large, or 9300- 0970 - small)
connected to a suitable ground. Failure to heed this caution may result in
damage to the instrument.
When storing or in between handling of PCBs (Printed Circuit Boards), always
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place them in static control envelopes or enclosures.
19. Remove the FID detector PCB by sliding it out of the main PCB (at the right side of the instru-
ment). Removal of the PCB will withdraw the interconnect from the thermal strap. Use caution
to avoid damaging the spring at the end of the interconnect.
20. Remove the three screws securing the collector mount to the thermal strap.
21. Remove the collector mount and collector assembly as a unit.
22. Use a 1/4- inch nut driver to remove the jet
from the detector weldment.
23. Use a 1 and 1/4- inch socket to remove the
base spanner nut from the detector weldment.
24. Remove the thermal strap by removing the five
screws securing it to the instrument.
25. Remove the two screws securing the detector
weldment to the instrument.
26. Slide the insulation plate out from over the de-
tector weldment.
27. If the detector is to be reused, cap the detector
weldment at its upper opening, using a detec-
tor cap, and at its lower opening, inside the col-
umn oven.
28. Remove the insulation around the detector
weldment to expose the two screws securing
the weldment to the instrument.
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COLLECTOR
NUT
COLLECTOR
SPANNER
NUT
COLLECTOR
MOUNT
THERMAL
STRAP
INSULATION
PLATE
HEATED
SVC 4- 23
DETECTOR PCB
INTERCONNECT
IGNITOR
CLAMPS
JET
BASE SPANNER NUT
THERMAL STRAP
BLOCK
HEATER
SENSOR