Specifications

46
Troubleshooting
The service strategy for troubleshooting oscilloscopes is to isolate problems to a faulty
assembly, then use the disassembly and assembly procedures in the "Replacing
Assemblies" chapter to replace the defective assembly.
Read the Safety Notices at the back of this guide before servicing the oscilloscope.
Before performing any procedure, review any cautions and warnings included in the
procedures.
The only equipment you need for troubleshooting to the assembly level is basic electronic
troubleshooting tools such as a digital multimeter. If you need to remove and replace
any assembly, refer to the "Replacing Assemblies" chapter.
A Default Setup is provided to return the oscilloscope to a known state. You can use
the default setup to undo previous setups so they do not interfere with the current
measurement. Use the default setup when a procedure requires it. Press [Default Setup]
on the front panel to set the oscilloscope to the default state.
WARNING INJURY CAN RESULT! Use caution when the oscilloscope fan blades are exposed as
they can cause injury.
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. Failure to follow proper ESD procedures may cause
immediate failure or latent damage. Latent damage may result in equipment failure
after a period of time. As a minimum, place the oscilloscope on a properly grounded
ESD mat and wear a properly grounded ESD strap.
WARNING SHOCK HAZARD!
Maintenance should be performed by trained service personnel aware of the hazards
involved (for example, moving parts, fire, and electric shock). Lack of training and
awareness of the hazards could result in electrical shock or other injury. When
maintenance can be performed without power applied, the power cord should be removed
from the oscilloscope.