HP 5890 SERIES II Service Manual page 188

c. Remove the air deflector using a Pozidriv screwdriver to remove the screw securing the air
deflector to the inlet weldment.
Handle the heater and sensor cartridges with care to prevent breakage.
cartridges (particularly the smaller sensor cartridge) are fragile.
d. Carefully slide the heater and sensor cartridges out of the heated block portion of the inlet.
e. Use a Pozidriv screwdriver to remove the two screws securing the inlet to the instrument.
f. Lift the inlet enough to expose the heated block.
g. If installed, remove the cryo- blast tube from the inlet weldment.
h. Install the cryo- blast weldment onto the inlet weldment.
i. Secure the inlet to the instrument using two screws.
Handle the heater and sensor cartridges with care to prevent breakage.
cartridges (particularly the smaller sensor cartridge) are fragile.
j. Carefully slide the heater and sensor cartridges into the heated block portion of the inlet.
k. Install the air deflector and secure it to the weldment using one screw.
l. Install the injection assembly, septum, PCOC insert spring, and insert (the injection assem-
bly secures the other items to the inlet weldment).
m. Install the injection port cover.
21. Mount the new valve body on the mounting bracket and secure using two screws.
22. Mount the assembly on the oven wall in the same position as the one just removed.
23. Route the wire harness along the same path used by the old harness and secure it with plastic
wire ties.
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