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Safety
PERSONAL SAFETY
Be sure to read and follow the safety suggestions in Form
229-1264, a pocket-sized card issued to all IBM Customer
Engineers.
Remember:
• Loose clothing can become entangled in moving parts of
the machine.
• Drive belts, because of their internal cable construction,
can cause serious injury.
DO NOT
crank a machine by
pulling on the drive belts.
• Heat sinks are at an electrical potential.
DO NOT
short
heat sinks to each other or to the machine side frame.
• Always unplug machine power and wait ONE FULL
MINUTE before attempting repairs or adjustments in
the power supply area.
• Voltages developed in the resonant circuit of regulating
power supplies are apt to be much greater than the line
voltages.
• Follow the specific safety precautions that accompany
many of the adjustment procedures in this manual.
Be aware that the 5424 motor and/or clutches can operate
unexpectedly. Conditions that could cause this are:
• Program commands.
• Loss of a de voltage to a machine, gate, board or chassis,
card, or pin.
• Removing or inserting a card or cable.
• Probing and accidentally shorting a pin.
iv
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EQUIPMENT SAFETY
Electrical
Always replace blown fuses with fuses of the same type
and rating. Using fuses of a different type or higher rating
could result in component damage.
Remove power from the machine before replacing MST
cards, magnets, or solenoids. Failure to do this could result
in damage to a card being replaced or to other cards in the
net.
Mechanical
Do
not operate the machine under power with units dis-
assembled, removed, or maladjusted. Keep tools, etc. clear
of the mechanism when the machine is opera ting under
power.
Caution
Do
not use IBM cleaning fluid on plastic parts.
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