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CE SAFETY PRACTICES
All customer engineers are expected to take
every precaution possible and observe the fol-
lowing safety practices while maintaining IBM
equipment:
1.
Do not work alone under hazardous con-
ditions or around equipment with dan-
gerous voltage.
Note:
Always advise your manager if you
MUST work alone.
2.
Remove all power, ac and dc, when you
are removing or assembling major compo-
nents, working in the immediate area of
power supplies, performing mechanical
inspection of power supplies, and installing
changes in machine circuitry.
3.
4.
5.
Lock or tag the wall box power switch after
you turn it off. Attach "DO NOT OPER-
ATE" tags, form 229-1266, when applicable.
Pull the power supply cord whenever
possible.
When it is absolutely necessary to work on
equipment having exposed operating mech-
anical parts or exposed live electrical cir-
cuitry anywhere in the machine, take the
following precautions:
a. Ensure that another person, familiar
with the power off controls, is present.
b. Do not wear rings, wristwatches, chains,
bracelets, metal cuff links, or any
other metal personal jewelry.
c. Use only insulated pliers, screwdrivers,
and probes.
d. Keep one hand in your pocket.
e. Be certain that the controls are set
correctly and that you have the
proper capacity probes when using
test instruments.
f. Avoid contacting a ground potential
(metal floor strips, machine frame,
metal lamps, etc); use rubber mats pur-
chased locally, if necessary.
6.
Wear safety glasses when you are:
a. Using a hammer to drive pins, rivets,
stakes, etc.
b. Using power tools for drilling, reaming,
grinding, and other metal work.
c. Attaching springs with a spring hook.
d. Soldering, cutting wire, or removing
steel bands.
e. Cleaning parts or using solvents, sprays,
cleaners, or any other chemicals.
f. Working under any other condition
that might be hazardous to your eyes:
SAFEGUARD YOUR EYES.
7.
Follow the special safety instructions out-
lined in the CEMs and in the safety sec-
tion of the maintenance manuals when
handling cathode ray tubes and high
voltage.
8.
Do not use solvents, chemicals, grease, or
oil that are not approved by IBM.
9.
Do not use tools or test equipment that is
not approved by IBM.
10.
Replace worn or broken tools and test
equipment.
11.
Do not lift a load that you and your man-
ager feel would jeopardize your health
12.
13.
14.
15.
16.
17.
and well-being or that of other employees.
Restore all guards, shields, signs, ground
wires, and other safety devices after
mai ntenance.
Avoid touching moving mechanical parts
when lubricating, checking for gap, etc.
Do not touch ANYTHING while using
the stroboscope; parts could be moving
even though the strobe light makes them
appear to be stopped.
Do not wear loose clothing that might
catch in the machinery.
Keep your shirt sleeves buttoned or roll
them above the elbow.
Tuck your tie in your shirt or wear a non-
conductive tie clasp attached approxi-
mately 3 inches from the end of your tie.
Do NOT use a tie chain.
KNOWING SAFETY IS NOT ENOUGH. AN
UNSAFE ACT INEVITABLY LEADS TO AN
ACCIDENT. USE GOOD JUDGEMENT-
ELIMINATE UNSAFE ACTS.
Be sure that your actions do not render the
product unsafe or expose customer personnel to
unsafe conditions. Practice the following pre-
cautions to protect customer personnel:
1.
Maintain good housekeeping in the ma-
chine area during and after maintenance.
2.
3.
a. Place removed machine covers in an
out-of-the-way place where no one can
trip over them.
b. Place the CE tool kit away from walk
areas (under a desk or table) so no one
can trip over it.
Make sure that fellow CEs and customer
personnel are not in a hazardous position
before starting the equipment.
Replace all machine covers before returning
the machine to the customer.
DANGERS
Resistors and solenoids become extremely hot
after prolonged use. Be sure the components
have cooled before performing maintenance
in these areas:
2.2.2
2.2.4
3.2.12
4.2.3
4.2.9
4.2.10
4.2.30
4.2.32
5.2.2
5.2.3
8.0.0
Disk Enclosure Removal
Disk Brake Assembly Adjustment
33FD Drive Motor Removal and
Replacement
Printer Thermal Switch Removal and
Replacement
Motor and Paper Clamp Resistor
Removal and Replacement
Print Unit Removal and Replace-
ment
Ribbon Drive Clutch Removal and
Replacement
Ribbon Solenoid Adjustment,
Removal and Replacement
Display Assembly Removal and
Replacement
Display Assembly Yoke Adjustment
Power Supplies
xiii
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