74
Keysight E1406A Command Module Service Guide
Service
Troubleshooting
3 Ready LED (ONLY) ON
When the “Ready” LED is ON, normal operation is indicated. However, there may
be configuration errors. If you have an RS-232 terminal connected, check the
terminal display for configuration errors (see Chapter 5 - Error Messages for
code explanations).
If you do not have an RS-232 terminal connected, you can check for
configuration errors by sending the SYST:ERR? command to the command
module. See “Test S-1: GPIB Power-On Self-Test” in Chapter 2 - Verification
Tests for an example program.
–
If +0, “No error” is returned, the system is normal and no further action is
required.
–
If one or more configuration error messages are returned, see Chapter 5 -
Error Messages for possible causes/corrections. Correct configuration
errors and exchange modules as required. Replace module(s) as required,
turn mainframe power ON and rerun Step 2 - Check LEDs and Terminal
Display.
4 Failed and SYSFAIL LEDs ON
The command module has failed the power-on self-test OR the module could
not complete initialization of one or more installed modules. Turn mainframe
power OFF and go to Step 6 - Check Command Module.
5 Failed LED (ONLY) ON
If only the Failed LED is ON after 5 seconds, one of the following conditions has
occurred. Turn mainframe power OFF and go to Step 6 - Check Command
Module.
–
The command module has FAILED the power-on self-test OR
–
The command module has stopped working for some reason (e.g., no
interrupt response from a register-based device even though the device
driver is present in the command module) OR
–
The command module is a servant to another commander that is asserting
SYSFAIL INHIBIT in the command module’s Control Register.
The SYSFAIL LED should never be ON by itself. The SYSFAIL LED
does NOT monitor the status of the backplane *SYSFAIL signal. If
another device pulls *SYSFAIL low, it will not turn on the SYSFAIL
LED. The command module will, however, perform a reboot/reset
if *SYSFAIL goes low.
Summary of Contents for VXI bus 75000 C Series
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