3 Replacing Assemblies
184 Keysight 53210A/53220A/53230A Assembly Level Service Guide
Electrostatic discharge
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 Keysight Technologies
factory warranty. This instrument is not intended to be repaired by replacing
individual components, only assemblies.
Electronic components and assemblies in the Keysight 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:
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