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Troubleshooting the Oscilloscope
The service policy for this instrument is replacement of defective
assemblies. The following procedures can help isolate problems to the
defective assembly.
SHOCK HAZARD!
W A R N I N G
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 front
of this book before proceeding. Failure to observe safety precautions may
result in electrical shock.
Do not disconnect any cables or remove any assemblies with the power
C A U T I O N
applied to the oscilloscope, or damage to the oscilloscope can occur.
ELECTROSTATIC DISCHARGE (ESD) can damage electronic components.
C A U T I O N
When using any of the procedures in this chapter you should use proper ESD
precautions. As a minimum, you should place the instrument on a properly
grounded ESD mat and wear a properly grounded ESD strap.
The following equipment is needed for troubleshooting the oscilloscope.
Table 4-18
Equipment Required
Equipment
Digital multimeter
Oscilloscope
Probe
Dummy load
1
4–40
Critical specifications
Accuracy ±0.05%, 1 mV resolution
100 MHz
10:1 division ratio
1
Compatible with power supply
See page 4–41 to construct your own dummy load.
Recommended
model/part
HP 34401A
HP 54600B
HP 10432A
see note 1 below
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