GBC FusionPunch II Service Manual page 274

Precautions
Follow these safety, ESD, and servicing
precautions to prevent personal injury and
equipment damage.
1. Check that all built-in protective devices,
such as Interlock Switches and Wire
Channel Covers, are in place. Restore any
missing protective devices.
2. Check that there are no Cabinet or Wire
Channel openings through which people
might insert fingers or objects and contact
dangerous voltages.
3. When re-installing assemblies, restore all
protective devices and covers.
4. Design Alteration Warning:
Never alter or add to the mechanical or
electrical design of this equipment, such as
auxiliary connectors, etc. Such alterations
and modifications will void the
manufacturer's warranty.
5. Components, parts, and wiring that appear
to have overheated or are otherwise
damaged should be replaced with parts
which meet the original specifications.
Always determine the cause of damage or
overheating, and correct any potential
hazards.
6. Observe the original lead dress, especially
near sharp edges, AC, and high voltage
power supplies. Always inspect for pinched,
out-of-place, or frayed wiring.
7. Replacement component differs from the
original. This holds true even though the
replacement may be rated for higher
voltage, wattage, etc.
Precautions
ESD Precautions
Certain semiconductor devices easily damaged by static electricity are commonly called
"Electrostatically Sensitive Devices", or ESDs. Examples of typical ESDs are: integrated circuits,
some field effect transistors, and semiconductor components.
The techniques outlined below should be followed to help reduce the incidence of component
damage caused by static electricity.
1. Immediately before handling a semiconductor component or semiconductor-equipped
assembly, drain off any electrostatic charge on your body by touching a known earth ground.
Alternatively, employ a commercially available wrist strap device, which should be removed for
personal safety reasons prior to applying power to the unit under test.
2. After removing an electrical assembly equipped with ESDs, place the assembly on a
conductive surface, such as aluminum or copper foil, or conductive foam, to prevent
electrostatic charge buildup in the vicinity of the assembly.
3. Do not use Freon-propelled chemicals. When sprayed, these can generate electrical charges
sufficient to damage ESDs.
4. Do not remove a replacement ESD from its protective packaging until immediately before
installing it. Most replacement ESDs are packaged with all leads shorted together by
conductive foam, aluminum foil, or a comparable conductive material.
5. Immediately before removing the protective shorting material from the leads of a replacement
ESD, touch the protective material to the chassis or circuit assembly into which the device will
be installed.
6. Maintain continuous electrical contact between the ESD and the assembly into which it will be
installed, until completely plugged or soldered into the circuit.
7. Minimize bodily motions when handling unpackaged replacement ESDs. Normal motions,
such as the brushing together of clothing fabric and lifting one's foot from a carpeted floor, can
generate static electricity sufficient to damage an ESD.
12/2003
6-2
GBC FusionPunch II Service Manual