Specifications

Table Of Contents
Chapter 3 Replacing Assemblies
Tools Required
172 Assembly-Level Service Guide
Electrostatic Discharge
CAUTION Electronic components and assemblies in the Agilent 53210A,
53220A, and 53230A Counters can be permanently degraded or
damaged by electrostatic discharge. Humans can accumulate
static electricity charges of several thousand volts on their skin or
clothes (harmless to them) but which can discharge through
sensitive semi-conductor circuits causing permanent damage. Use
the following precautions when installing or replacing
assemblies:
1 DO ensure that static-sensitive devices or assemblies are handled
only at a static-safe work station that provides proper grounding
for service personnel.
2 DO ensure that static-sensitive devices or assemblies are placed
or stored in static shielding bags or containers.
3 DO ensure that you are wearing a static-safe wristband that is
grounded to the mat and to earth ground.
4 DO NOT wear clothing subject to static-charge buildup, such as
wool or synthetic materials.
5 DO NOT remove an assembly or component from its static
shielding protection until you are ready to install it.
6 DO NOT handle components or assemblies in carpeted areas.
7 AVOID touching component leads. (Handle by packaging only.)
Surface Mount Repair
Surface mount components should only be removed using soldering irons
or desoldering stations expressly designed for surface mount components.
Use of conventional solder removal equipment will almost always result in
permanent damage to the printed circuit board and will void your Agilent
Technologies factory warranty. This instrument is not intended to be
repaired by replacing individual components, only assemblies.