Electrostatic Discharge (Esd) Precautions; Service Safety Summary; General Guidelines - Xerox Phaser 6100 Service Manual

Precautions

1.4 Electrostatic Discharge (ESD) Precautions

Some semiconductor components , and the respective sub-assemblies that contain them, are vulnerable to damage by
Electrostatic discharge (ESD). These components include Integrated Circuits (ICs), Large-Scale Integrated circuits
(LSIs), field-effect transistors and other semiconductor chip components. The following techniques will reduce the
occurrence of component damage caused by static electricity.
Be sure the power is off to the chassis or circuit board, and observe all other safety precautions.
Immediately before handling any semiconductor components assemblies, drain the electrostatic charge from
your body. This can be accomplished by touching an earth ground source or by wearing a wrist strap device
connected to an earth ground source. Wearing a wrist strap will also prevent accumulation of additional bodily
static charges. Be sure to remove the wrist strap before applying power to the unit under test to avoid potential
shock.
After removing a static sensitive assembly from its anti-static bag, place it on a grounded conductive surface. If
the anti-static bag is conductive, you may ground the bag and use it as a conductive surface.
Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage some devices.
Do not remove a replacement component or electrical sub-assembly from its protective package until you are
ready to install it.
Immediately before removing the protective material from the leads of a replacement device, touch the protective
material to the chassis or circuit assembly into which the device will be installed.
Minimize body motions when handling unpackaged replacement devices. Motion such as your clothes brushing
together, or lifting a foot from a carpeted floor can generate enough static electricity to damage an electro-
statically sensitive device
Handle IC's and EPROM's carefully to avoid bending pins.
Pay attention to the direction of parts when mounting or inserting them on Printed Circuit Boards (PCB's).

1.5Service Safety Summary

1.5.1 General Guidelines

For qualified service personnel only:
Refer also to the preceding Power Safety Precautions.
Avoid servicing alone: Do not perform internal service or adjustment of this product unless another person capable
of rendering first aid or resuscitation is present.
Use care when servicing with power: Dangerous voltages may exist at several points in this product. To avoid
personal injury, do not touch exposed connections and components while power is on. Disconnect power before
removing the power supply shield or replacing components.
Do not wear jewelry: Remove jewelry prior to servicing. Rings, necklaces and other metallic objects could come
into contact with dangerous voltages and currents.
Power source: This product is intended to operate from a power source that will not apply more then 260 volts rms
for a 220 volt AC outlet or 140 volts rms for a 110 volt AC outlet between the supply conductors or between either
supply conductor and ground. A protective ground connection by way of the grounding conductor in the power cord
is essential for safe operation.
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