HP 5890 SERIES II Service Manual page 169

Replace Oven Heater Element
HAZARDOUS VOLTAGES ARE PRESENT IN THE INSTRUMENT WHEN THE POWER
CORD IS CONNECTED. AVOID A POTENTIALLY DANGEROUS SHOCK HAZARD BY
DISCONNECTING THE POWER CORD BEFORE WORKING ON THE INSTRUMENT.
1. Set the main power line switch to the off position.
2. Disconnect the power cable from its receptacle.
3. Allow time for the oven and heated zones to cool.
4. When the heated zones are cool, turn off all gas
supplies.
5. Remove the four screws securing the rear
cover to the instrument.
SCREWS
6. Slide the rear cover towards the rear of the
instrument.
7. Remove columns and other hardware from
any installed inlets and detectors, which pre-
vents free access to the heater shroud.
8. Locate the four screws securing the oven/
heater fan shroud, and the two screws secur-
ing the heater standoffs.
9. Remove the six screws and carefully swing
the left edge of the shroud towards the front
of the instrument.
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SCREWS
SVC 5- 7
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