Table of Contents
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WARNING
The information
in this section is in-
tended only for qualified
service per-
sonnel. Some of the procedures
may
expose you
to hazardous
voltages
that could result in personal injury
or
death. Do not attempt
to perform
these
procedures
unless
you
are
qualified
to do so.
Service Information
5.1
Introduction
This section contains information
necessary to service
the Model 7014 multiplexer
card and is arranged as fol-
lows:
5.2
Handling
and cleaning
precautions:
Discusses
handling
precautions
and methods to clean the
card should it become contaminated.
5.3
Performance verification:
Covers the procedures
necessary to determine if the card meets stated
specifications.
5.4
Calibration:
Describes calibrating
the card to its
specified temperature
accuracy.
5.5
Special
handling
of static-sensitive
devices:
Reviews precautions
necessary when handling
static-sensitive
devices.
5.6
Principles
of operation:
Briefly discusses circuit
operation.
5.7
Troubleshooting:
Presents s"me troubleshooting
tips for the Model 7014 including
relay replace-
ment precautions.
5.2
Handling and cleaning precautions
Because of the high-impedance
areas on the Model
7014, care should be taken when handling
or servicing
the card to prevent possible contamination.
The fol-
lowing
precautions
should be taken when servicing
the card.
Handle the card only by the edges and shields. Do not
touch any board surfaces or components not associated
with the repair. Do not touch areas adjacent to electrical
contacts. When servicing
the card, wear clean cotton
gloves.
Do not store or operate the card in an environment
where dust could settle on the circuit board. Use dry ni-
trogen gas to clean dust off the board if necessary.
Should it become necessary to use solder on the circuit
board, use an OA-based (organic activated)
flux. Re-
move the flux from the work areas when the repair has
been completed. Use pure water along with clean cot-
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Table of Contents
Troubleshooting
