HP 5890 SERIES II Service Manual page 163

OVEN TEMPERATURE
REPLACING OVEN TEMPERATURE CONTROL COMPONENTS
Oven temperature control components include the oven, the oven fan and motor, the oven flap motor,
and the cryogenic valve (if installed). Removal and installation instructions for all of these components
are found on the following pages. Refer to page 20 of this section for information on troubleshooting
the oven temperature control components. Refer to Section 6 of the IPB for part numbers associated
with the oven temperature control components.
Current maintenance philosophy suggests that the oven shroud assembly be replaced as a unit, rather
then replacing the heater element or sensor element individually. Maintenance procedures have been
included for both entire shroud replacement, as well as individual part replacement, in the event that
the shroud assembly is not available in a timely manner, etc.
Specific part numbers are not given in this section. For all replacement part numbers, refer to Section 6
of the IPB portion of this document (Oven Assembly).
This document is not meant to provide instruction for first time installation of the options discussed.
Add- on sheets exist for just this purpose, and should be referenced when performing a first time instal-
lation.
REPLACING OVEN TEMPERATURE CONTROL
COMPONENTS
OVEN TEMPERATURE TROUBLESHOOTING
Replace Oven Shroud Assembly
Replace Oven Heater Element
Replace Oven Temperature Sensor
Replace Oven Fan and/or Oven Fan Motor
Replace Oven Flap Motor
Replace Cryogenic Valve and/or Nozzle
Calibrate Oven Temperature
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TABLE OF CONTENTS
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SVC 5- 1
Section 5
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SVC 5- 3
SVC 5- 7
SVC 5- 11
SVC 5- 15
SVC 5- 19
SVC 5- 23
SVC 5- 29