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6-3
Replacing Assemblies
WARNING HAZARDOUS VOLTAGES !
Read the safety summary at the back of this book before proceeding.
Maintenance 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.
WARNING AVOID ELECTRICAL SHOCK !
Hazardous voltages exist on the CRT, power supply, and display sweep board.
To avoid electrical shock:
1
Disconnect the power cord from the oscilloscope.
2 Wait at least three minutes for the capacitors in the oscilloscope to
discharge before you begin disassembly.
Read the Safety Summary at the back of this manual before you begin.
CAUTION REMOVE POWER TO AVOID DAMAGE !
Remove power before you begin to remove and replace assemblies. Do not
remove or replace assemblies while the oscilloscope is turned on, or damage
to the components can occur.
CAUTION AVOID DAMAGE TO ELECTRONIC COMPONENTS !
ELECTROSTATIC DISCHARGE (ESD) can damage electronic components.
When doing any of the procedures in this chapter, 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.
service.book Page 3 Wednesday, December 18, 2002 8:35 AM