Service manual

4-2 AlphaServer GS80/160/320 Service Manual
4.1 System Safety
These systems use a great deal of power. Use appropriate safety
precautions when working on them.
Table 4–1 Hazards and Safety Features
Hazard Risks Safety Features Exposed Areas
AC power
Flashing metal
Shock
Death
AC only in the power
cabinet
AC loads fully enclosed
Securely mated wiring
system
None
48 VDC
power
Flashing metal
Welding of jewelry
heat
Securely mated wiring
system
48V isolated from cabinets
Covers
Current limit
QBB backplane
H-switch backplane
CPU module
Power modules
Low
voltage
power
Flashing metal
Welding of jewelry
heat
Short circuit protection
Current limit
QBB backplane
H-switch backplane
Logic modules
Power modules
System
blowers
Severe cuts
Loss of fingers
Grill Exposed only when
lower system box out
PCI
enclosure
Low voltage power
hazard
Battery on
standard I/O
AC loads fully enclosed
Interlock
Under power supply
connector on the
backplane