Tektronix TLA 704, Service Manual

Page: 103 / 144

Troubleshooting
6–48
TLA 704 Color Portable Mainframe Service Manual
J2 rows of pins J1 rows of pins
Figure 6–17: Location of J1 and J2 pins within the portable mainframe
If you have completed all of the troubleshooting procedures up to this point and
the TLA 700 application fails to display any modules in the System Window, you
may have a system problem. Check for the following:
H
Verify that all modules are properly installed in the portable mainframe.
H
Verify that the module address switches are set correctly. Power off the
portable mainframe and remove the modules. Set the address switches to FF
and reinstall the modules.
H
Verify that the modules do not have the flash programming jumper installed
on the rear of the module. Power off the portable mainframe and remove the
modules. Remove the jumper and reinstall the modules.
H
Try placing a suspected module in a different slot to verify slot dependency
problems. For example, if you have a single module in slots 0 and 1, power
off the mainframe, move the module to slots 1 and 2, and try the tests again
If the module works in the new location, you have identified a faulty slot in
the mainframe.
H
Check for bent or broken pins on the backplane of the portable mainframe.
Isolating System
Problems