Tektronix TLA7XM, Руководство пользователя

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Troubleshooting
6- 72
TLA721 Benchtop & TLA7XM Expansion Mainframe Service Manual
4.
If the mainframe still fails to operate properly, install the known good
expansion module in Slot 0 of the expansion mainframe.
5.
If the failure symptoms are still present with the known good expansion
module installed, try new expansion cables between the mainframes.
6.
If the symptoms are still present after using a known good expansion module
and known good cables, the problem is most likely in the expansion
mainframe and the module needs to be serviced.
If you do not have a known good expansion module, perform the following steps
to make sure the expansion mainframe is not the source of the failure:
H
Remove all plug-in modules from the expansion mainframe except the
expansion module.
H
Power-on the benchtop mainframe and determine if the expansion mainframe
is recognized by the TLA system.
Another way to isolate problems would be to “trick” the expansion mainframe
into thinking it was a benchtop mainframe. You can do this by removing the
expansion module from the Slot 0 position in the expansion mainframe and
replacing it with a known good benchtop controller module from your benchtop
mainframe.
Because the expansion mainframe is set up to power-on from a signal from the
expansion module (which is no longer present) you will have to press and hold
the power switch on the expansion mainframe for three to four seconds.
If the expansion mainframe powers-on correctly, the problem can be isolated to
either the expansion modules or to the expansion cables.
Adjustments after Repair
There are no adjustment procedures required after replacing any part of the
benchtop controller, expansion module, or mainframes. You should, however,
power-on the instrument and verify that all diagnostics pass.
There may be adjustment procedures required for some of the installed modules.
Check the appropriate service manual for additional information.
Check the Expansion
Mainframe
Replace the Expansion
Module with a Benchtop
Controller Module