1261B User Manual
Maintenance 7-16
Racal Instruments
Ó
1995
Table 7-1, Troubleshooting
PROBLEM
POSSIBLE CAUSES
WHAT TO DO
“Power” annunciator
does not come on
·
1261B mainframe
not connected to
power source.
·
Power/On/Standby
switch not switched
on.
·
Remote inhibit input
on rear panel of
power supply is
active.
·
Blown AC Mains
Fuse.
·
Power supply
protections are
active causing the
supply to be
“shutdown”.
·
Power supply not
fully seated.
·
Faulty wiring to front
panel Power
On/Standby Switch
·
Make sure that the 1261B is
connected to a live electrical
outlet. Try operating another
piece of equipment from this
outlet.
·
Set the front Power On/Standby
switch to the
ON
position (See
“Powering On The Mainframe”
in
Chapter 3
).
·
Remove the inhibit by opening the
remote switch (or deasserting the
remote open collector driver).
See
“Using Remote Power
On/Standby Switching”
in
Chapter 3.
·
Unplug AC mains power and
check the fuse. See
“Removing
and Replacing the AC Mains
Fuse”
in
Chapter 7.
·
Refer to
“Power Supply
Protections”
in
Chapter 6.
·
Cycle power to clear fault.
If fault
persists remove installed VXI
modules (cycle power) until fault is
cleared.
·
Verify that the power supply
assembly is fully seated and all six
thumbscrews are fastened. See
“Removing and Replacing the
Power Supply”
in
Chapter
7
.
·
Verify integrity of wiring to Power
On/Standby switch. Contact
customer service
.
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