Replacement
Use the following procedure to replace the Capacitor/Power Module:
WARNING: Touching the Capacitor/Power Module is very dangerous because of the high voltages present
on the battery cables and high voltages on the capacitor bus bars. The Capacitor/Power
Module is also dangerously close to the High Voltage Tank and High Voltage cables, which
are also a source of high voltage. You must always assume that lethal voltages are present at
ALL these points EVEN WHEN THE SYSTEM IS POWERED DOWN. Failure to read and
follow all directions may result in death or serious injury from electric shock.
1. Turn off Workstation and disconnect its AC power plug from the AC outlet.
2. Disconnect Interconnect cable from C-Arm.
3. Remove Front Cover from C-Arm and slide it forward over the High Voltage cable.
4. Remove Right Side cover from C-Arm.
5. USING GREAT CARE TO AVOID ELECTRIC SHOCK, disconnect battery cables from P1A and P3B on Capacitor/Power
Module.
6. Locate two battery cables just above P1A and P3B. These two cables have blue connectors that connect to each other.
USING GREAT CARE TO AVOID ELECTRIC SHOCK, disconnect the cables from each other and move them out of the
cable restraint on the Capacitor/Power module.
7. USING GREAT CARE TO AVOID ELECTRIC SHOCK, connect a current-limiting resistor (300K or so) across bus bars to
discharge high energy capacitors inside Capacitor/Power module.
Note: Busbars on an installed Capacitor/Power Module are difficult to see. The following illustration shows the busbars on an
uninstalled module. The two free wires on the ends of the busbars connect to terminals on the IGBT Snubber PCB. Be
careful not to lose or damage the transient-suppressing toroid that surrounds the two wires.
44
Service
Periodic Maintenance
Contents
Schematics
Illustrated Parts
Installation
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