HP 5890 SERIES II Service Manual page 158

8. With the exception of the TCD and FPD detector PCBs, all of the detector PCBs employed in
the HP5890 Series II include an interconnect assembly, which connects in one fashion or anoth-
er to a portion of the actual detector. In order to remove the detector PCB, the components
which retain the interconnects (or other wiring) must be loosened, removed, or disconnected as
applicable for a particular detector:
` TCD:
Disconnect the detector filament and del-
ta- t temperature sensor leads at their con-
nector block on the detector PCB. Use a
small flat- blade screwdriver to press each
wire lead release (located adjacent to each
connection).
` FID:
Loosen the screws securing the clamps
holding the detector PCB interconnect in
place.
` NPD:
a. Use a Pozidriv screwdriver to remove the
three screws securing the detector cover to
the thermal strap.
b. Disconnect the NPD bead power cable
from the detector PCB by pulling it straight
off.
c. Loosen the screws securing the detector
PCB interconnect clamps to the thermal
strap.
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STRIPPED END
OF TCD
FILAMENT LEAD
COLLECTOR
SVC 4- 88
PRESS
HERE
CLAMPS
INTERCONNECT
DETECTOR COVER
INTERCONNECT
CLAMP SCREW