HP 5890 SERIES II Service Manual page 120

10. Remove the screw securing the ground strap to
the hinged top cover
11. With the lower right side of the cover pushed in, lift the right side of the cover and slide it to the
right to remove the top cover and lid shaft as a unit.
12. Remove the electronics carrier top cover by grasping it at the rear and lifting upwards until its
catch releases, then pulling it towards the rear of the instrument.
13. Remove the right side panel by removing four screws: two each along its upper and lower
edges.
14. Using a Pozidriv screwdriver, remove the three
screws securing the detector cover to the ther-
mal strap.
15. Remove the detector cover.
16. Disconnect any tubing attached to the detector
exhaust tube.
17. Disconnect the cell collector lead from the PCB
interconnect.
18. Loosen the screws securing the clamps which
hold the interconnect in place.
The following steps require protection against ESD
`
(Electro- Static Discharge). 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
`
place them in static control envelopes or enclosures.
19. Remove the detector PCB from the right side of the instrument by grasping it in the center area
along its outer edge and pulling it straight out. (This will draw the interconnect out of the detec-
tor clamps on the thermal strap.
20. Remove the five screws securing the thermal strap and shield to the instrument.
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ELECTRONICS
CARRIER TOP
COVER
CLAMPS
SVC 4- 50
SCREWS
RIGHT SIDE
PANEL
SCREWS
CELL COLLECTOR
LEAD
PCB INTERCONNECT
THERMAL
STRAP