If The Green Led Of The Preregulator (A15) Is Off Or Blinking; Check The Line Voltage, Selector Switch, And Fuse - Agilent Technologies 8719ET Service Manual

Power Supply Troubleshooting

If the Green LED of the Preregulator (A15) Is Off or Blinking

If the Green LED of the Preregulator (A15) Is Off or
Blinking
If the green LED is not on steadily, the line voltage is not enough to power the analyzer.

Check the Line Voltage, Selector Switch, and Fuse

Check the main power line cord, line fuse, line selector switch setting, and actual line
voltage to see that they are all correct.
a small flat-blade screwdriver to pry out the fuse holder.
the line voltage selector switch. Use a small flat-blade screwdriver to select the correct
switch position.
Refer to
NOTE
description and part number.
If the A15 green LED is still not on steadily, replace A15.
Figure 5-4 Removing the Line Fuse
5-8
Figure 5-4
"Hardware, Preregulator" on page 13-83
shows how to remove the line fuse, using
Figure 5-2 shows the location of
for the correct line fuse
8719ET/20ET/22ET
8719ES/20ES/22ES
RF Network Analyzers
Service Guide