Troubleshooting; Prepare The Mainframe; Check Leds And Terminal Display - Keysight Technologies VXI bus 75000 C Series Service Manual

Service

Troubleshooting

This section shows suggested steps to troubleshoot Keysight E1406A Command
Module faults to a fuse on the A1 PCA or to a replaceable mechanical part listed
in Table 3-2. See Figure 4-1 for suggested steps.

1 Prepare the Mainframe

To begin troubleshooting, turn the mainframe power switch OFF and remove all
power sources to any installed modules. Connect an RS-232 terminal to the front
panel RS-232 port. See the C-Size VXIbus Systems Configuration Guide for
information on connecting and configuring an RS-232 terminal.

2 Check LEDs and Terminal Display

Press the mainframe power switch ON and observe the four LEDs on the
command module front panel and the power-on display on the RS-232 terminal.
Then, wait at least 5 seconds before proceeding to the next step (Step 3, Step 4,
or Step 5).
For NORMAL power-on, the RS-232 terminal display shows:
For NORMAL power-on, the command module LED sequence is:
Depending on the LED(s) that remain ON after 5 seconds, go to Step 3 - Ready
LED ON, Step 4 - Failed and SYSFAIL LEDs ON, or Step 5 - Failed LED (ONLY)
ON.
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The RS-232 terminal is a very valuable tool for use in power-on
and diagnostic troubleshooting, since it provides a "front panel"
for the command modules. See Chapter 3 - Using the Display
Terminal Interface in the Keysight E1406A Command Module
User's Manual for details on RS-232 terminal operation and
features
– A kernel test that tests RAM, ROM, and the microprocessor, monitors the
ACFAIL* line and then calls the Resource Manager to check the system.
– Resource Manager configuration/errors for the power-on sequence. See
"Test S-2: RS-232 Power-On Self-Test" in Chapter 2 - Verification Tests for
a typical power-on sequence.
– Failed and SYSFAIL LEDs turn ON for 5 sec, then turn OFF
– Next, the Access light blinks ON at least once and turns OFF
– Then, the Ready LED turns ON and remains ON
Keysight E1406A Command Module Service Guide
Troubleshooting