There is no emission current

Filament has failed or is not connected correctly

1. Switch to the spare filament and when prompted to autotune click YES.
   
   If the MSD passes tune, use this filament. Replace the first filament when convenient.

2. If the second filament does not pass tune, vent the MSD and check the filament wiring connections.

3. Check the filaments. Replace them if necessary.

See the MSD maintenance documentation for instructions for replacing a filament.

MSD electronics are not working correctly

Contact your Agilent Technologies service representative.