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5-6
Troubleshooting the Oscilloscope
The service policy for the 54621A/22A/24A Oscilloscopes and the
54621D/22D Mixed-Signal Oscilloscopes is instrument replacement.
Please call (877) 447-7278 to return the defective instrument, and
Agilent Technologies will expedite a refurbished instrument to you
under the Agilent Express Exchange program.
WARNING HAZARDOUS VOLTAGES EXIST — REMOVE POWER FIRST !
The maintenance described in this section is performed with power supplied
to the oscilloscope and with the protective covers removed. Only trained
service personnel who are aware of the hazards involved should perform the
maintenance. Whenever possible, perform the procedures with the power
cord removed from the oscilloscope. Read the safety summary at the back of
this book before proceeding.
CAUTION REMOVE POWER TO AVOID DAMAGE !
Do not disconnect any cables or remove any assemblies while power is applied
to the oscilloscope, or damage to the oscilloscope can occur.
CAUTION AVOID ESD DAMAGE TO COMPONENTS !
ELECTROSTATIC DISCHARGE (ESD) can damage electronic components.
Use proper ESD precautions when doing any of the procedures in this chapter.
As a minimum, place the oscilloscope on a properly grounded ESD mat and
wear a properly grounded ESD strap.
Equipment required for troubleshooting
The equipment listed in Table 5-1 is required to troubleshoot the oscilloscope.
Table 5-1
Equipment Required to Troubleshoot the Oscilloscope
Equipment Critical Specifications Recommended Model/Part
Digital multimeter Accuracy ±0.05,% 1 mV resolution Agilent 34401A
Oscilloscope 100 MHz, 1 M
Ω input R Agilent 54622A
Dummy load Compatible with power supply See “To construct your own
dummy load” on page 5-7.
service.book Page 6 Wednesday, December 18, 2002 8:35 AM