HP 5890 SERIES II Service Manual page 134

7. Remove the two screws securing the left
side panel along its bottom edge.
8. Slide the left side panel towards the rear
of the instrument and lift.
9. Remove the four screws securing the rear
cover to the instrument.
10. Slide the rear cover towards the rear of the
instrument.
SCREWS
11. Lift the hinged top cover at its front edge,
exposing the detector area.
12. Remove the drip tube from the exhaust tube at
the top of the detector.
13. Remove the exhaust tube from the detector us-
ing a 9/16- inch wrench.
14. Remove the chimney assembly by removing
the two screws securing it to the chimney back.
15. Disconnect the ignitor wire lead connector at
the mating connection on the detector weld-
ment by removing the screw which secures it to
the glo- plug assembly.
GLO- PLUG ASSEMBLY
DIODE BRIDGE LEAD
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SCREWS
DETECTOR
ASSEMBLY
SVC 4- 64
EXHAUST TUBE
CHIMNEY
SCREW