Agilent Technologies 5975T LTM GC Operation Manual page 104

3
Operating in Electron Impact (EI) Mode
FB = Feedthrough Board
Repeller
(red wire
from FB)
Filament 1
(white wires
from FB)
Ion focus lens
(orange wire
from FB)
Entrance lens
(blue wire
from FB)
Figure 28 Ion source wiring
2 Check the side plate O-ring.
104
Make sure the O-ring has a very light coat of Apiezon L high vacuum grease.
If the O-ring is very dry, it may not seal well. If the O-ring looks shiny, it has
too much grease on it. (Refer to the 5975T LTM GC/MSD Troubleshooting
and Maintenance Manual for lubricating instructions.)
5975T LTM GC/MSD Operation Manual
Ion source
heater wires
Ion source
sensor wires
Filament 2
(black wires
from FB)