Section 9 - Diagnostics
9-10
VM700A Option 01 (NTSC) & Option 11 (PAL) User Manual
Loop On Test loops on the latest group of tests, and displays the number of
times the test group has been run, as well as the total number of failures
found. Touching the Change Run Mode softkey when looping on a
diagnostics test halts the test and returns the SELECT RUN MODE
display.
Rerun Test re-runs the latest group of tests.
Change Run Mode returns you to the SELECT RUN MODE display.
The Diagsloop diagnostic runs each diagnostic selected in the Diagnostics
Selection file in PowerUp mode. The diagnostics are run consecutively and
continuously, looping back to the first diagnostic after the last is completed. The
current loop number appears in the upper right corner of the display.
The message FAIL FOUND appears in the upper left corner of the display if a
failure is found by any of the selected diagnostics. You can either monitor the
Diagsloop execution to spot the failure, or (if the failure is intermittent), examine
the contents of the Diagnostic~Errors file in the /nvram0/ConfigFiles directory.
To exit Diagsloop, touch the Abort Looping softkey.
Running Diagnostics Remotely
If the VM700A display is not operating or is operating improperly, you will not
be able to view diagnostic results. The VM700A supplies a method, known as
Debug mode, to view diagnostic results on a terminal or PC should the display
be malfunctioning.
In Debug mode, the VM700A redirects low-level power-up diagnostic display
output to the rear-panel PORT 0 serial connector by default.
See Section 2, Installation and Operation, for information about connecting a
terminal or PC to the PORT 0 connector of the VM700A. In particular, see the
text entitled Connecting Outputs for details on the required cable wiring.
If you are connecting a PC to the VM700A, you will also have to run a terminal
emulator program in order to read the information output by the VM700A.
To enter Debug mode:
1. Switch the VM700A power off.
2. Press and hold the Help button and switch the VM700A power on.
3. After about 5 seconds, release the Help button.
The terminal now displays the same menu as when Debug mode is forced.
Diagsloop
Connecting a Terminal or
PC
Entering Debug Mode
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