HP 5890 SERIES II Service Manual page 100

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.
12. 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.)
13. Use a 1.5- mm hex wrench to loosen the two
set screws which secure the collector inside the
collector assembly.
Do not handle the collector with bare hands.
Use needle- nose pliers when handling the
collector to avoid contaminating it with finger
oils and/or other contaminants.
14. Use needle- nose pliers, inserted through the
opening in the top of the detector cover, to re-
move the collector by forcing it down from in-
side the top of the collector assembly.
15. Remove the two Pozidriv screws securing the
collector assembly to the detector cover.
COLLECTOR BODY
SCREWS
16. Remove the two screws securing the toroid/
spacer assembly to the inside of the detector
cover.
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SET SCREW
SVC 4- 30
SPACER
TOROID WIRE
SOLDERED AT THIS
POINT
COLLECTOR
SET SCREW
COLLECTOR
ASSEMBLY
COLLECTOR
SET SCREW
COLLECTOR
COLLECTOR
ASSEMBLY
TOROID
SPACER
ASSEMBLY
SCREW