Sample Tray Doesn't Stop At Correct Location (G1289/G1290 Only); Sampling Sequence Won't Start - Agilent Technologies G1289 Operating Manual

Troubleshooting
Mechanical/Electrical Problems
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Sample Tray Doesn't Stop at Correct Location (G1289/G1290 only)

Probable Causes
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Suggested Actions
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Sampling Sequence Won't Start

Probable Causes
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Check the stepper motor. Measure R across the left or right pair of wires in
the motor connector: R = 6–7 ohms.
Set agitation on with Vial Parameters.
Tighten or replace the belt in the oven assembly. See your service manual
or contact Agilent service.
Replace the stepper motor if necessary.
Call Agilent service.
Optical sensor is blocked or broken.
Faulty chip on the mother board.
Faulty encoder on the tray motor.
Make sure that the tab is in contact with the optical sensor.
Clean the sensor with an alcohol swab.
Call Agilent service.
The 7694 Headspace Sampler not ready.
Oven stabilization time not expired.
No vial in tray (G1289/G1290 only).
Setpoints not reached.
Check the 7694 Headspace Sampler setpoints.