Specifications

Troubleshooting

The service strategy for troubleshooting Agilent 90000 Series 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 working around the cooling fans with the

cover removed from the oscilloscope. The cooling fan blades are exposed on one side

and can be hazardous. If the procedure allows, replace the cover over the chassis

(without screwing it back in place) before turning the oscilloscope on. If the procedure

requires you to have the cover off, be careful not to let these fan blades come in contact

with any part of your body.

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.