Specifications

13-6
Troubleshooting
HP-MSIB Troubleshooting
HP-MSIB Troubleshooting
An HP-MSIB failure exists if any of the following indicators are lit:
• E (flashing) on the display.
• ERR (flashing) on Agilent 70843.
• HP-MSIB lit on the Display front panel.
The flashing E and ERR only occur at power on. When these occur normal communica-
tion between the Display and other elements in the system may be prevented. The cause of
this failure must be found before any predictable system operation can take place.
The possible causes of an HP-MSIB failure are as follows:
• Display, Agilent 70843 or Clock Source not powered on.
• Poor HP-MSIB cable connection or faulty cable.
• Faulty Display.
• Faulty Agilent 70843.
• Faulty Clock Source
From the Entry Chart
on page 13-2.
Are all
System Power
Line Indicators
lit?
Are
any of the
HP-MSIBerror
indicators
lit?
Check that the Display and 70843
LINE switches are set to ON.
Check that the power cables and
fuses are good, see pages 2-7 to 2-
10. Make sure that the LINE
VOLTAGE SELECTORS are set
correctly, see page 2-8.
Isolate the fault using the
procedure on page 13-7.
System O.K.
YES
YES
NO
NO
1. Power down the system. Then check that all HP-MSIB
cables are connected correctly, see page 2-16.
2. If the connectors are good, substitute all HP-MSIB cables
for known good ones.
3. Power on the system.