4
Service Information
4-1
WARNING
The information in this section is in-
tended only for qualified service person-
nel. Some of the procedures may expose
you to hazardous voltages that could re-
sult in personal injury or death. Do not
attempt to perform these procedures
unless you are qualified to do so.
4.1 Introduction
This section contains information necessary to service the
Model 2001-TCSCAN scanner card and is arranged as fol-
lows:
4.2 Handling and cleaning precautions:
Discusses han-
dling precautions and methods to clean the card should
it become contaminated.
4.3 Performance verification:
Covers the procedures
necessary to determine if the scanner card meets stated
specifications.
4.4 Calibration:
Describes calibrating the card reference
junction to its specified accuracy.
4.5 Special handling of static-sensitive devices:
Re-
views precautions necessary when handling static-
sensitive devices.
4.6 Principles of operation:
Briefly discusses circuit op-
eration.
4.7 Troubleshooting:
Presents some troubleshooting tips
for the Model 2001-TCSCAN including relay replace-
ment precautions.
4.8 Scanner card modification:
Explains the procedure
for removing the current-limiting resistors in channels
5 and 10.
4.2 Handling and cleaning precautions
Because of the high-impedance areas on the Model 2001-
TCSCAN, care should be taken when handling or servicing
the card to prevent possible contamination. The following
precautions should be observed when servicing the card.
4.2.1 Handling precautions
• Handle the card only by the edges and shields.
• Do not touch any board surfaces or components not as-
sociated 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.
To Next Page
Loading...
Need help?
General
