Remove/Replace Inlet Zone Heater And Sensor Cartridges; Remove/Replace Packed Column Inlet Heater And Sensor Cartridgessvc - HP 5890 SERIES II Service Manual

Remove/Replace Inlet Zone Heater and Sensor Cartridges

` Remove/Replace Packed Column Inlet Heater and Sensor Cartridges
PERFORM THE PROCEDURE FOR DISCONNECTING/CONNECTING HEATER AND
TEMPERATURE SENSOR WIRING ON MAIN PCB BEFORE PERFORMING THIS
PROCEDURE.
1. Allow time for the heated zones to cool.
2. At the bottom of the inlet, inside the column
oven, remove the column and hardware asso-
ciated with the inlet (liner, column/liner nuts,
ferrules, makeup gas adapter, etc.).
3. Inside the column oven, cap the base of the
inlet.
4. Remove the injection port cover by grasping its
back edge and lifting it upward.
5. Remove any insulation from around the top of
the inlet.
6. Use a Pozidriv screwdriver to remove the two
screws securing the inlet and insulation plate to
the instrument. (Depending on the age of the
instrument, the insulation plate may be flat, as
shown at the left, or may be a box, as shown
below.
7. Lift the inlet enough to expose the heated block and heater/sensor wiring.
8. Remove any insulation from around the base of the inlet.
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LID SHAFT
INSULATION
PLATE
SVC 6- 9
INJECTION PORT COVER
TOP COVER
1/4- INCH
SCREW
AND
WASHER