IPC-7711A/7721A Rework of Electronic Assemblies IPC-7711, Change 1 - February 2002 IPC-7711 - February 1998 Repair and Modification of Printed Boards and Electronic Assemblies IPC-7721, Change 2 - April 2001 IPC-7721, Change 1 - March 2000 IPC-7721 - February 1998 These standards are now published in a single volume with three sections. Part 1 includes the general information and procedures that are common to both IPC-7711A and IPC-7721A. Part 2 includes all the rework procedures from IPC-7711A and Part 3 includes all the repair and modification procedures from IPC-7721A. Developed by the Repairability Subcommittee (7-34) of the Product Assurance Committee (7-30) of IPC Users of this publication are encouraged to participate in the development of future revisions. Contact: IPC 2215 Sanders Road Northbrook, Illinois 60062-6135 Tel 847 509.9700 Fax 847 509.9798 Supersedes: IPC-R-700C - January 1988 ASSOCIATION CONNECTING ELECTRONICS INDUSTRIES ®
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IPC - ELECTRONICS INDUSTRIES Rework of …IPC-7721, Change 2 - April 2001 IPC-7721, Change 1 - March 2000 IPC-7721 - February 1998 These standards are now published in a single volume
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IPC-7711A/7721A
Rework of Electronic AssembliesIPC-7711, Change 1 - February 2002IPC-7711 - February 1998
Repair and Modification of PrintedBoards and Electronic AssembliesIPC-7721, Change 2 - April 2001IPC-7721, Change 1 - March 2000IPC-7721 - February 1998
These standards are now published in a single volumewith three sections. Part 1 includes the general informationand procedures that are common to both IPC-7711A andIPC-7721A. Part 2 includes all the rework procedures fromIPC-7711A and Part 3 includes all the repair and modificationprocedures from IPC-7721A.
Developed by the Repairability Subcommittee (7-34) of the ProductAssurance Committee (7-30) of IPC
Users of this publication are encouraged to participate in the
1.1 Scope This document covers procedures for repair-ing and reworking printed board assemblies. It is an aggre-gate of information collected, integrated and assembled bythe Repairability Subcommittee (7-34) of the ProductAssurance Committee of the IPC.
1.2 Purpose This document prescribes the proceduralrequirements, tools and materials and methods to be usedin the modification, rework, repair, overhaul or restorationof electronic products. Although this document is based inlarge part on the Product Class Definitions of ANSI/J-STD-001, this document should be considered applicable to anytype of electronic equipment. When invoked by contract asthe controlling document for the modification, rework,repair, overhaul or restoration of products, the requirementsflowdown apply.
IPC has identified the most common equipment and pro-cess in order to affect a specific repair or rework. It is pos-sible that alternate equipment and processes can be used tomake the same repair. If alternate equipment is used, it isup to the user to determine that the resultant assembly isgood and undamaged.
1.2.1 Definition of Requirements The wordsmust andshall have no special meaning beyond that commonly usedin other IPC standards.
1.2.2 Requirements Flowdown The applicable require-ments of this document must be imposed by each manufac-turer or supplier on all applicable subcontracts and pur-chase orders. The manufacturer or supplier must notimpose or allow any variation from these requirements onsubcontracts or purchase orders other than those that havebeen approved by the user. Unless otherwise specified, therequirements of this document are not imposed on the pro-curement of off the shelf assemblies or subassemblies.However, the manufacturer of these items may comply asdeemed appropriate.
1.3 Background Today’s PC boards are more complexand microminiaturized than ever before. Despite this, theycan be successfully modified, reworked or repaired if theproper techniques are followed. This manual is designed tohelp you repair, rework and modify PC boards reliably. Theprocedures in this document have been obtained from endproduct assemblers, printed board manufacturers and end
product users who recognized the need for documentingcommonly used rework, repair and modification tech-niques. These techniques have, in general, been proven tobe acceptable for the class of product indicated throughtesting and extended field functionality. Procedures con-tained herein were submitted for inclusion by commercialand military organizations too numerous to list individu-ally. The Repairability Subcommittee has, where appropri-ate, revised procedures to reflect improvements.
Rework completed satisfactorily will meet the originalspecification and requirements of IPC-A-600 and IPC-A-610. But, by definition, modifications and repairs do notcomply with the initial design or fabrication criteria. Formodification and repair, the user must recognize that thecriteria in IPC-A-600 Acceptability of Printed Boards andIPC-A-610 Acceptability of Printed Board Assemblies arenot necessarily applicable to the procedures herein. Modi-fications and repairs should not compensate for the lack ofproper processes and quality controls. Ultimate cost effec-tiveness is achieved using appropriate design, fabricationand assembly techniques that minimize the need for modi-fication and repair.
1.4 Controls Although modification, rework and repairprocedures may be very similar, the control of such proce-dures may not be the same, due to the conditions andobjectives involved.
1. ModificationThe revision of the functional capability of a productin order to satisfy new acceptance criteria.
Modifications are usually required to incorporatedesign changes which can be controlled by drawings,change orders, etc. Modifications should only be per-formed when specifically authorized and described indetail on controlled documentation.
2. ReworkThe act of reprocessing non-complying articles,through the use of original or equivalent processing, ina manner that assures full compliance of the articlewith applicable drawings or specifications.
3. RepairThe act of restoring the functional capability of adefective article in a manner that precludes complianceof the article with applicable drawings or specifica-tions.