Tektronix TLA 720, Руководство по обслуживанию

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Mainframe Troubleshooting
4–40
TLA 720 Benchtop Chassis and TLA 7XM Expansion Chassis Service Manual
Table 4–5: Failure symptoms and possible causes (cont.)
Symptom Possible causes and recommended action
Portable Mainframe will not power-
off with On/Standby switch. The mainframe utilities may be set up to disable hard power-off. Check the setting of the
mainframe utilities (the mainframe utilities are located in the Windows 98 Control Panel).
This is a Windows operating system problem. Try powering-off the mainframe using the
Windows 98 shutdown procedure. If the mainframe still does not power-off, disconnect power
cord and reconnect after 10 seconds to reboot the mainframe.
Expansion Mainframe will not
power-off with On/Standby switch. If the expansion mainframe was incorrectly shut down (for example, the power cord was
disconnected while the expansion mainframe was running) the expansion mainframe utility still
“thinks” that the expansion mainframe is on.
To correct this condition, press and hold the power switch for three to four seconds. The
expansion mainframe will power-down on its own. Power-off the benchtop mainframe. Power-on
the benchtop mainframe, the expansion mainframe will power-up normally.
TLA 700 Startup Sequence
The following information is intended to provide troubleshooting hints in case
the logic analyzer fails to complete the startup sequence. You may want to refer
to Figure 4–20 on page 4–32 while reading the following paragraphs.
At power-on, the mainframe software starts the mainframe and module kernel
tests. If the mainframe passes the kernel tests, it attempts to boot the Windows
operating system. If the mainframe fails the kernel tests, it displays the error
code(s), beeps, and terminates the startup sequence.
The Windows operating system starts the resource manager. The resource
manager (ResMan32) performs the following tasks:
H
Mainframe power-on self tests.
H
Expansion mainframe power-on self tests.
H
Verifies the power-on self test status.
H
Inhibits any failed modules.
H
Records the power-on self test failures.
H
Determines the logic analyzer configuration.
H
Executes the system controller power-on diagnostics.
After completing all of the above tasks (if you have performed the TLA 700
Final Setup), the logic analyzer starts the TLA 700 application which performs
the following tasks:
H
Power-on diagnostics on all installed modules.