Maintenance
DPO4000 Series Service Manual 4-13
TroubleshootingProcedure
Figures 4--3through 4--5are troubleshooting procedure flowcharts. Use them to
troubleshoot an instrumentfailure. Begin with Figure 4--3.
NOTE. Beforeperforming the troubleshooting procedure, remove the instrument
cabinet (seepage 4 --9 ).
Yes
No
Done.
Poweron the
instrument.
Performthe AC Power Supply
troubleshootingprocedure
(Figure4 --4).
Yes
No Performthe Module Isolation
troubleshootingprocedure
(Figure4 --5).
Does
theinstrument pass
allthe
diagnostics?
Does
theinstrument
displaythe power-up
screen?
Figure4 -3: Primary tr oubleshootingpr ocedure