GE HEALTHCARE
DIRECTION 2307224-100, REVISION 6DISCOVERY LS SYSTEM SERVICE MANUAL
Chapter 2 - Discovery LS System Safety Information Page 49
• Avoid standing near the rotating assembly when it is operational, to avoid being struck by
the assembly or ejected objects.
• Avoid standing or kneeling near the slip-ring platter. High voltages exist on the exposed
rings. Always disable power to the rings by using the switches on the STC before performing
service.
• Never put any part of your body into the gantry, unless the gantry is locked. Axial drive power
must be disabled. The tilt bracket should be installed, if working on the tilt assembly.
• Avoid inhalation of slip-ring dust. Use a respirator or appropriate mask when performing
service on the ring.
• Wear and use personal protection equipment.
• Lock-out and tag-out power at the main disconnect.
Always use and follow procedures described in the service documentation, when servicing this
equipment.
2.3.1.2 CT Gantry Electrical
Potential Hazards
All uninsulated electrical contacts, including the slip-ring, have secondary covers in place to protect
service personnel from accidental contact. Refer to Figure 2-11. Removal of any secondary cover
exposes service personnel to potentially deadly voltages. All secondary covers must be in place
before primary covers are installed and during routine service.
Figure 2-11: Gantry Slip-Ring Platter Cover
Uninsulated high voltage areas in the brush-block area include:
• High voltage DC for X-ray generation. Only measurement equipment isolated from ground
can be used to measure HVDC on this system. Use of grounded measurement equipment
can result in serious personal injury and/or equipment damage.
• 120 VAC for power supplies.
Unprotected Area
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