GE Discovery LS - Section 2.5 Table; 2.5.1 Electrical Hazards

GE HEALTHCARE
DIRECTION 2307224-100, REVISION 6DISCOVERY LS SYSTEM SERVICE MANUAL
Page 60 Chapter 2 - Discovery LS System Safety Information
2.5 Table
2.5.1 Electrical Hazards
The table base contains several lethal voltages. There are a number of points in the table where
the voltages are dangerous (120 VAC and 70 DC present). Theses points pose a potential electrical
hazard to anyone that accidentally comes in contact with them.
2.5.1.1 Safety Awareness Indicators
Refer to Figure 2-18. A power lamp is located on the table power assembly. It is illuminated
whenever power is present at the table service outlets.
2.5.1.2 Service Outlet
Refer to Figure 2-18. A service outlet is located on the table’s power assembly. It is protected by
CB3 in the PDU.
Figure 2-18: Table Service Outlet and Safety Switches
2.5.1.3 Switches
Refer to Figure 2-19. The Table Safety Service switches are located on top of the power assembly.
These switches are a subset of the 120 VAC switch on the gantry.
Figure 2-19: Table Switches
Safety Switches
Power Lamp
S1
180 DC
DRIVES
S2
120 VAC
DRIVES
S3
120 VAC
24 HR
OFF OFF OFF
ON ON ON
S1 180 DC Drives - Enables/disables 170 VDC Power Supplies
for table elevation.
S2 120 VAC Drives - Enables/disables 24 V Power Supply for
table cradle and elevation.
S3 120 VAC 24 HR-Enables/disables 120 VAC Table Power.