Agilent Technologies 5975C TAD VL MSD Troubleshooting And Maintenance Manual page 50

2
General Troubleshooting
• Electrical leads to the detector are not connected correctly
• HED power supply output cable failed
• Electrical leads to the ion source are not connected correctly
• Filament shorted to the source body
Temperature control disabled
• One of the heater fuses has failed
• MSD electronics are not working correctly
Temperature control fault
This indicates that something has gone wrong with the temperature control of
either the ion source or mass filter (quad) heater. The cause can be further
isolated by selecting Status/MS Temp Ctlr Status in the Tune and Vacuum
Control view. One of the following should be displayed as the cause:
• Source temperature sensor is open
• Source temperature sensor is shorted
• Mass filter (quad) temperature sensor is open
• Mass filter (quad) temperature sensor is shorted
• No heater voltage (heater fuse has probably failed)
• Heater voltage is too low
• Temperature zone has timed out (heater failed, bad heater wiring, or loose
• Problem with the temperature control electronics
• Source heater is open
• Source heater is shorted
• Mass filter heater is open
• Mass filter heater is shorted
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temperature sensor)
5975 Series MSD Troubleshooting and Maintenance Manual