Electronics 8
5977B Series MSD Troubleshooting and Maintenance Manual 221
Back Panel and Connectors
The back panel (See Figure 53 on page 223) contains several connectors, the
primary fuses, and several status LEDs. Most of these components are part of
the AC board or the LAN/MS control card, and extend through the back panel.
HI-VAC SIGNAL
The high vacuum signal connector is on the AC board. See “Turbo pump
control” on page 217and “Diffusion pump control” on page 217.
HI-VAC POWER
The high vacuum power connector carries power for the diffusion pump
heater or the turbo controller from the AC board.
Primary fuses
The primary fuses limit current into the MSD in case of a short circuit in the
foreline pump. The primary fuses are on the AC board.
Power cord receptacle
The AC power cord brings in all electrical power for the MSD. The power cord
can be detached from the MSD.
FORELINE PUMP
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.
REMOTE
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.
To Next Page
Loading...
Need help?
General
