HP 5890 SERIES II Service Manual page 178

FAN SHROUD
Fan Shroud
FAN BLADES ARE FRAGILE. BE CAREFUL NOT TO BEND THE BLADES.
12. If only the fan blade is being replaced, go to step 18.
13. At the rear of the instrument, trace the fan motor wire harness to its connector receptacle (J28)
on the AC power board.
WHEN DISCONNECTING A PLUG, PULL ON THE PLUG NOT ON ITS WIRES. PULLING
ON THE WIRES MAY CAUSE BREAKAGE.
14. Disconnect connector J28 from its receptacle by pulling it straight up while squeezing its ribbed
sides.
15. Locate and remove the fan motor ground wire by removing the nut securing it to the instrument.
16. Remove the three nuts (and six associated washers) securing the motor to the oven.
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SENSOR
SCREWS
HEATER
STANDOFFS
SET SCREW
5890
SERIES II
FAN
GAS CHROMATOGRAPH
SVC 5- 16