IBM 7331, Installation Manual, Page: 11 / 62

Attention Notices
An attention notice indicates the possibility of damage to a program, device,
system, or data.
Safety Inspection Procedures
Perform the following safety inspection prior to the normal maintenance agreement
inspection. Suspect the 8mm Tape Library is unsafe until verified it is safe. If
unsafe conditions are present, decide how serious the hazard is and whether you
can continue without correcting the problem. Possible safety hazards are:
Electrical An electrically charged frame can cause serious or lethal electrical
shock.
Mechanical Hazards, such as a missing safety cover, are potentially harmful to
people.
Chemical Do not use solvents, cleaners, or other chemicals not approved for
use on the product.
Use Figure 1 to perform the following safety procedures. Before starting the
procedures, ensure the existing room and electrical conditions are safe.
L e g e n d :
X X X
X X X
E x t e r n a l t o o t h l o c k w a s h e r
G r e e n / y e l l o w g r o u n d w i r e t e r m i n a t e d t o c h a s s i s o r g r o u n d
R e d u n d a n t g r o u n d p a t h t o f r a m e
E x t e r n a l t o o t h l o c k w a s h e r
G r e e n / y e l l o w g r o u n d w i r e t e r m i n a t e d w i t h s l i p - o n s p a d e t e r m i n a l
A
34M
0139
Figure 1. AC Grounding Diagram (50 Hz and 60 Hz)
1. Power off the 8mm Tape Library.
2. Disconnect the channel cables.
3. Disconnect the power cord
1
from its source.
4. Check that no voltage exists between the housing on the power source and the
building ground.
5. Verify that resistance is less than 0.1 ohm from the building ground to the
power supply enclosure
3
.
6. Inspect the power cable
1
for visible cracks, wear, or damage.
Notices
ix