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Service Information
5.6
Troubleshooting
5.6.1 Troubleshooting equipment
Table 5-5 summarizes recommended equipment for trouble-
shooting the Model 7015.
Table 5-5
Recommended troubleshooting equipment
Manufacturer
Description
and model
Multimeter
Keithley 2001
Oscilloscope
TEK 2243
Switching
Keithley 7001
mainframe
5.6.2 Troubleshooting access
In order to gain access to the relay card top surface to mea-
sure voltages under actual operation conditions, perform the
following steps (Model 7001 only):
1. Disconnect the connector card from the relay card.
2. Remove the Model 7001 cover.
3. Install the relay card in the CARD 1 slot location.
4. Turn on Model 7001 power to measure voltages (see fol-
lowing paragraph).
5.6.3 Troubleshooting Procedure
Table 5-6 summarizes switch card troubleshooting.
5-16
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Application
Measure DC voltages
View logic waveforms
Control card
WARNING
Lethal voltages are present within the
7001 mainframe. Some of the proce-
dures may expose you to hazardous
voltages. Observe standard safety pre-
cautions for dealing with live circuits.
Failure to do so could result in personal
injury or death.
CAUTION
Observe the following precautions when
troubleshooting or repairing the switch
card:
To avoid contamination, which could
degrade card performance, always han-
dle the card only by the handle and side
edges. Do not touch edge connectors,
board surfaces, or components on the
card. Also, do not touch areas adjacent
to electrical contacts on connectors.
Use care when removing parts from the
PC board to avoid pulling traces away
from the circuit board. Before attempt-
ing to remove a part, use an appropriate
de-soldering tool, such as a solder suck-
er, to clear each mounting hole com-
pletely free of solder. Each pin must be
free to move in its mounting hole before
removal.
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