Control Data Corporation CYBER 180 810 Maintenance And Parts Manual page 35

TROUBLESHOOTING
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This section directs the use of all known troubleshooting techniques in a
step-by-step manner. Diagnostics (including some deadstart tests) and
maintenance controls and indicators are described.
SAFETY PRACTICES
All customer engineers are required to take reasonable and appropriate pre-
cautions with respect to electrical, mechanical, and personal safety hazards
when working on a computer system. Pay careful attention to all entries in
the maintenance documentation labelled CAUTION or WARNING. These labels
identify hazardous areas or procedures encountered in the maintenance of
system equipment. Above all, use good judgement and common sense, a moment of
thought before you act can save hours of agonizing afterthought. The follow-
ing guidelines must be followed when working on equipment.
PERSONAL
1. ·You are responsible for ensuring that no action taken by you causes
conditions that may expose any person to hazard.
2. Never work alone on equipment which has exposed operating mechanical parts
and/or exposed power components. If you must do so, notify your EIC or
manager. In any case, the following precautions must be observed:
a. Someone familiar with the power-off procedures must be in the
immediate area.
b. Personel jewelry (rings, wristwatches, bracelets, necklaces, etc.)
must be removed.
c. If using only one hand, keep the other in your pocket.
d. Avoid wearing loose articles of clothing which can be snagged and
drawn into moving machinery. Wear a short-sleeved shirt or roll long
sleeves above the elbows.
Neckties should be tucked into the shirt between the second and third
buttons or fastened with a tie-tack or tie-clasp, preferably non-
conductive. Do not use tiechains. Clip-on neckties are preferable;
if caught, they pull free without causing injury.
e. Before starting equipment, make sure that no person is in a position
where s/he could be hurt.
f. While working in or on equipment, put red tape strips across, or DO
NOT OPERATE tags on, the power controls.
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