2Service
154 Keysight 53210A/53220A/53230A Assembly Level Service Guide
Repair considerations
Electrostatic discharge
Electronic components and assemblies in the Keysight 53210A, 53220A, or
53230A Counters can be permanently degraded or damaged by electrostatic
discharge. Observe the following precautions when servicing the instrument:
1 ENSURE that static-sensitive devices or assemblies are serviced at static-safe
work stations providing proper grounding for service personnel.
2 ENSURE that static-sensitive devices or assemblies are stored in static
shielding bags or containers.
3 DO NOT wear clothing subject to static-charge buildup, such as wool or
synthetic materials.
4 DO NOT remove an assembly or component from its static shielding protection
until you are ready to install it.
5 DO NOT handle components or assemblies in carpeted areas.
6 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 paragraph is for information only. The Keysight 53210A/
53220A/53230A Counters are not intended for customer repair of the printed
circuit boards in these instruments.
Disassembly and reassembly specifics
Refer to Chapter 3, "Replacing Assemblies" in this guide for complete
disassembly and reassembly details, and Chapter 5, "Replaceable Parts" for the
appropriate part number of a failed instrument part.
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