Electronics 8
Troubleshooting and Maintenance Manual 179
Primary fuses
The four primary fuses limit current into the MS in case of a short circuit in
the foreline pump. Fuse values are shown on the panel.
Turbo pump power receptacle
The turbo pump power receptacle provides power for the turbo pump.
Foreline pump power receptacle
The foreline pump power cord receptacle provides AC power for the foreline
pump. If the power switch is off, no power is supplied to the foreline pump.
Turbo controller / fan receptacle
This provides power and control for the turbo pump controller and the turbo
pump cooling fan.
Main power cord receptacle
The AC power cord brings in all electrical power for the MS. The power cord
can be detached from the MS.
Vacuum gauge connector
This connector powers the two vacuum gauges and connects their signals to
the controlling electronics.
Remote start connector
The remote start connector is the external connector for the remote start
circuitry on the LAN/MS control card. It receives remote start signals from the
GC.
LAN (I/O) connector
The LAN cable from the data system is connected to the LAN communications
connector. It carries all data communication between the PC and the MS.
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