Tektronix TLA 720, Service Manual

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TLA 720 Benchtop Chassis and TLA 7XM Expansion Chassis Service Manual
4–35
Mainframe Troubleshooting
This chapter provides information that addresses problems you may encounter
while installing the logic analyzer.
This chapter does not identify module specific problems relating to performance
verification or adjustments.
Diagnostics
The following diagnostic tools are available with your logic analyzer:
Power-On Diagnostics.
Power-on diagnostics run when you first power-on the
logic analyzer, or when you first start the TLA 700 Series application. If any
diagnostic failures occur during power-on, the Calibration and Diagnostics
property page appears.
Extended Diagnostics.
Extended diagnostics test the logic analyzer more
thoroughly than the power-on diagnostics. The extended diagnostics test the
modules in the benchtop mainframe as well as the modules in the expansion
mainframe(s). You can use the extended diagnostics to isolate problems to an
individual module.
Before running the extended diagnostics, disconnect any attached probes.
TLA 700 Mainframe Diagnostics. The TLA Mainframe diagnostics program is a
stand alone Windows application located in the TLA 700 program group. These
diagnostics check operation of the mainframe beyond the basic PC circuitry.
These diagnostics also check the front panel knobs of the portable mainframe.
Expansion Mainframe Diagnostics. At power-on, the expansion mainframe runs
two power-on diagnostics: “Power, Cables A & B and config”, and “Cable C
Connection Test”.
If either of these power-on diagnostics fail, none of the modules associated with
the expansion mainframe, and possibly the expansion mainframe itself, will be
recognized. The result will be as if the expansion mainframe was not connected.
Power down the mainframes. Remove the two blue expansion cables and the
gray expansion cable. Examine the connectors for bent or missing pins.
Reconnect the two blue expansion cables and the gray expansion cable, and
tighten the two connector screws. power-on the mainframes and try again.