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5
Troubleshooting
To check the power supply voltages
WA R N I N G
16900A and 16902A power supplies
40
Hazardous voltages exist on the power supply. This procedure is
to be performed by service-trained personnel aware of the
hazards involved, such as fire and electrical shock.
1
Turn off the instrument using one of the methods
descirbed in
"To power off the system"
Disconnect the instrument's power cord, move the
2
instrument to a static safe work environment, then
remove the cover (instructions in
the cover"
on page 52).
Disconnect all cables from the power supply except the
3
power cable.
Reconnect the instrument's power cord, then apply power
4
to the instrument.
Using a digital volt meter, measure the power supply dc
5
voltages.
6
Referring to the graphics that follow, note problems with
the power supply, then return to the flowchart.
The 16900A and 16902A systems have two power supplies.
One is 700 watts and the other is 500 watts. Use the
following graphics when measuring the voltages.
700 watt power supply voltages
on page 48
"To remove and replace
16900A, 16902A, and 16903A Service Guide
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Table of Contents
Troubleshooting
