RPR-4000
Operations manual
REV 8-21 46
Replacing the HV Fuse
The problem
No high power RF pulse output; when the high voltage power supply is enabled (front panel
rocker switch) the high voltage fuse holder (rear panel) glows orange.
Required action
The high voltage power supply fuse must be changed.
It is strongly recommended that that user determine if the instrument settings were responsible
for the fuse blow event.
1. Turn off the HV power switch (rocker switch, front panel)
2. Turn off the AC power switch (rocker switch, rear panel)
3. Wait 5 minutes for any remaining high voltage to dissipate.
4. Replace the fuse.
5. Once you have made the necessary changes to your input signals, reconnect them and
turn the HV power switch back on.
Replacement fuses must be of the same type and rating as specified
in this manual to maintain protection.
FOR 400W (-HD) and standard 8 kW models:
USE ONLY GBB-8-R replacement fuses when replacing the HV fuse
For High Power 15kW or Very High Power 20kW units:
USE ONLY GBB-10-R replacement fuses when replacing the HV fuse
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