HP 54540 Series - Page 101

CAUTION
WARNING
Replacing Assemblies
Procedures in this chapter should be used when removing and replacing assemblies
and parts in the HP 54520 and 54540 series oscilloscopes.
Jn general, the procedures that follow have been placed in the order they must be
used to remove a particular assembly. That is, given first are the procedures for
assemblies that must be removed first.
ESD Precautions
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 wrist strap.
Tools Required
The following tools are required for these procedures.
e Torx drivers: T10, T15
e Socket wrench: 5/8 inch
© Medium size (8/16-in) flat-blade screwdriver
e Nut Drivers: 3/16-in, 9/32-in, 5/16-in, 5/8-in
© Torque driver, 0.34 Nm (3 in-lbs), 5 mm or 3/16-in hex drive
e Torque driver, 0.23 Nm (2 in-lbs), Torx T6 drive
Do not remove or replace any circuit board assemblies in this instrument while power is
applied. The assemblies contain components which may be damaged if the assembly is
removed or replaced while the instrument is powered.
SHOCK HAZARD!
To avoid electrical shock, adhere closely to the following procedures. Also, after
disconnecting the power cable, wait at least three minutes for the capacitors on the power
supply and sweep boards to discharge before servicing this instrument. Hazardous voltages
that can cause death exist on the power supply, CRT, and the display sweep board.
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