Tektronix 071-1844-00 Maintenance, Figure4 -4: AC power supply troubleshooting procedure, 4-14 DPO4000 Series Service Manual

Maintenance
4-14 DPO4000 Series Service Manual
¯Reconnectloose cables.
¯Return to top of Figure 4--3.
No
Yes
Arethere
+12volts on the
connector
pins?
¯Measurefor +12 V DC (±0.3
V)on the connector pins. (See
figureat right)
!WARNING!
Becareful when measuring near
theAC power supply, as there
areline voltages present on
exposedparts.
ACpower supply OK. Return
theDPO4000 oscilloscope to
thenearest Tektronix Service
Centerfor repair.
Continuedfrom
Figure4 --3.
ConnectAC power cord.
¯Poweroff oscilloscope.
¯DisconnectAC power cord.
¯Removeinstrument case.
¯Checkthat all cables are
connectedand fully seated into
boardconnectors.
No
Yes
Areall cables
connected?
Replacethe AC Power
Supplymodule.
Figure4 -4: AC power supply troubleshooting procedure