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TROUBLESHOOTING: Electrostatic Discharge (ESD)
4-2
DASH 2000 Patient Monitor
Revision A
2000 412-001
Electrostatic Discharge (ESD)
CMOS Components
The monitor makes extensive use of CMOS components because they are
more immune to noise and consume less power than standard TTL or
NMOS components. However, CMOS components are inherently more
susceptible to electrostatic discharge (ESD) damage than other types of
semiconductor materials. ESD damage, causing a weakening or complete
breakdown of p-n junctions within multilayer semiconductor substrates,
can range from slight degradation to catastrophic failure. Slight
degradation usually results in intermittent failure of the affected
component catastrophic failure results in rendering the affected
component permanently unusable. Although CMOS components may be
more sensitive to ESD, all semiconductor devices are susceptible to ESD
damage.
All external connector inputs and outputs of the monitor are designed
with protection from ESD damage. However, if the monitor requires
service, exposed components and assemblies contained within are
susceptible to ESD damage. This includes human hands, non-ESD
protected work stations and/or improperly grounded test equipment.
The following guidelines help make a service workstation more resistant
to the ESD damage:
¥
Discharge any static charge you may have built up before handling
semiconductors or assemblies containing semiconductors.
¥
A grounded, antistatic wristband (3M part number 2046 or
equivalent) or heel strap should be worn
at all times
while handling
or repairing assemblies containing semiconductors.
¥
Use properly grounded soldering and test equipment.
¥
Use a static-free work surface (3M part number 8210 or equivalent)
while handling or working on assemblies containing semiconductors.
¥
Do not
remove semiconductors or assemblies containing
semiconductors from antistatic containers (Velo-stat bags) until
absolutely necessary.
¥
Make sure power to an assembly is turned off before removing or
inserting a semiconductor.
¥
Do not
slide semiconductors or electrical/electronic assemblies
across any surface.
¥
Do not
touch semiconductor leads unless absolutely necessary.
¥
Semiconductors and electrical/electronic assemblies should be stored
only in antistatic bags or boxes.
These guidelines may not guaranty a 100% static-free workstation, but
can greatly reduce the potential for failure of any electrical/electronic
assemblies being serviced.
Содержание marquette Dash 2000
Страница 12: ...Contents viii DASH 2000 Patient Monitor Revision A 2000 412 001 ...
Страница 82: ...Maintenance Repair Log 3 36 DASH 2000 Patient Monitor Revision A 2000 412 001 ...
Страница 156: ...UPPER LEVEL ASSEMBLY Spare Parts List 7 10 DASH 2000 Patient Monitor Revision A 2000 412 001 ...
Страница 157: ...Revision A DASH 2000 Patient Monitor 8 1 2000 412 001 8 ASSEMBLY DRAWINGS Contents ...
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