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HP ProSignia 120 Maintenance And Service Manual

Download Maintenance and service manual of HP 140 All in One Printer, Copier for Free or View it Online on All-Guides.com. This version of HP 140 Manual compatible with such list of devices, as: 140, 155, 160, 170

Brand: HP

Category: All in One Printer , Copier , Laptop , Printer

Type: Maintenance and service manual

Model: HP 140 , HP 155 , HP 160 , HP 170

Pages: 144 (2.84 Mb)

Download HP 140 Maintenance and service manual

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Page 69
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4-4    Removal and Replacement Preliminaries

4.4.2 Workstation Precautions

Use the following grounding precautions at workstations:

■ 

Cover the workstation with approved static-dissipative material (refer to  Table 4-2
later in this chapter).

■ 

Use a wrist strap connected to a properly grounded work surface and use properly
grounded tools and equipment.

■ 

Use field service tools, such as cutters, screwdrivers, and vacuums that are
conductive.

■ 

When using fixtures that must directly contact dissipative surfaces, use fixtures
made of static-safe materials only.

■ 

Keep work area free of nonconductive materials such as ordinary plastic assembly
aids and styrofoam.

■ 

Handle electrostatic-sensitive components, parts, and assemblies by the case or
PCM laminate. Handle them only at static-free workstations.

■ 

Avoid contact with pins, leads, or circuitry.

■ 

Turn off power and input signals before inserting or removing connectors or test
equipment.

4.4.3 Grounding Equipment and Methods

Grounding equipment must include either a wrist strap or a foot strap at a grounded
workstation.

■ 

When seated, wear a wrist strap connected to a grounded system. Wrist straps are
flexible straps with a minimum of one megohm 

±

10% resistance in the ground

cords. To provide proper ground, a strap must be worn snug against the skin. On
grounded mats with banana-plug connectors, connect a wrist strap with alligator
clips.

■ 

When standing, use foot straps and a grounded floor mat. Foot straps (heel, toe, or
boot straps) can be used at standing workstations and are compatible with most
types of shoes or boots. On conductive floors or dissipative floor mats, use them on
both feet with a minimum of one-megohm resistance between the operator and
ground. To be effective, the conductive strips must be worn in contact with the skin.