Agilent Technologies Infiniium 80000 Series Service Manual page 78

Figure 5-5
Power Supply Trouble Isolation
Disconnect cables from the DC
interface assembly (54857-66506),
disconnect the sense cable from
the power distribution board, plug
in the ac power cord to the power
supply, and turn on the scope.
power supply
Check the voltages on the DC
interface assembly
(see the following procedure).
Remove ac power.
Power supply OK.
Power Supply Trouble Isolation Flowchart
Does
No
fan turn?
Yes
Are
voltages
OK?
Yes
End
Check ac power cables to
power supply
Are
cables
OK?
No
Yes
Replace power supply.
Go to 'Power Board
Trouble Isolation'.
Chapter 5: Troubleshooting
Power Supply Trouble Isolation
No Reseat or replace bad cable.
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