74 S-Series Oscilloscopes Service Guide
5 Replacing Assemblies
ESD Precautions
When using any of the procedures in this chapter you must use proper ESD
precautions. As a minimum you must place the oscilloscope on a properly
grounded ESD mat and wear a properly grounded ESD wrist strap.
Tools Required
The following tools are required for these procedures.
• Torx drivers: T6, T10, T20
• Power driver vertical with T-20 bit (18 in-lbs)
• Power driver vertical with T-10 bit (5 in-lbs)
• Power driver vertical with T-6 bit (3 in-lbs)
Failure to implement proper antistatic measures may result in damage to the
oscilloscope.
Remove power before removing or replacing assemblies.
Do not remove or replace any circuit board assemblies in this oscilloscope while
power is applied. The assemblies contain components that may be damaged if the
assembly is removed or replaced while power is connected to the oscilloscope.
To avoid electric shock, adhere closely to the following procedures. Also, after
disconnecting the power cable, wait at least 3 minutes for the capacitors on the
power supply to discharge before servicing this oscilloscope.
Use caution when the oscilloscope fan blades are exposed as they can cause injury.
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