Early reliability and failure analysis of modern telephone audio systems

Author

Verbitsky, David E.

fYear

2003

fDate

2003

Firstpage

1

Lastpage

11

Abstract

Typical early failures of modern telephones, characterized by their inability to provide quality audio performance, were analyzed. Specifics of advanced mass consumer communication electronics reliability and failure analysis have been discussed. Complementary theoretical and experimental methods were applied in order to effectively evaluate diverse acoustical reliability specifics, allocate defects, and reveal their root causes. Practical fault tree for analog and digital technologies has been developed and illustrated; its benefits and limitations are discussed. FA of typical catastrophic and parametric failures of acoustical transducers; special transformers; shifts of parameters and their interaction with software; mechanical assembly tolerance; printed circuits and soldering, etc. are presented. Various fault interactions were found to noticeably contribute to failure aggravation. Recommendations for corrective action were developed.

Keywords

acoustic transducers; failure analysis; reliability; telephone sets; FMECA; catastrophic failures; defect root causes; defects allocation; diverse acoustical reliability; failure aggravation; failure analysis; failure mode effect and criticality analysis; fault interactions; mass consumer communication electronics reliability; mechanical assembly tolerance; parametric failures; printed circuits; quality audio performance; reliability; soldering; telephone audio systems; Acoustic transducers; Assembly; Audio systems; Failure analysis; Fault trees; Performance analysis; Printed circuits; Reliability theory; Telephony; Transformers;

fLanguage

English

Publisher

ieee

Conference_Titel

Reliability and Maintainability Symposium, 2003. Annual

ISSN

0149-144X

Print_ISBN

0-7803-7717-6

Type

conf

DOI

10.1109/RAMS.2003.1181760

Filename

1181760