Sender: |
|
Date: |
Sat, 9 Oct 1999 03:14:42 +0200 |
Reply-To: |
|
Content-transfer-encoding: |
7BIT |
Content-type: |
text/plain; charset=US-ASCII |
Subject: |
|
From: |
|
MIME-Version: |
1.0 |
In-Reply-To: |
|
Organization: |
Matthias Mansfeld Elektronik |
Comments: |
|
Parts/Attachments: |
|
|
A customer of mine who manufactures mostly class 2 or 3 products has
(or had) the following procedure:
They define two own classes for PWBs and assemblies. The
"lower" class refers to in-house standards, IEC359 and DIN IEC 326,
the "higher" to MIL-P-46843, -P-55110, -STD-275, -STD-454, and
DOD-STD-2000-1 to -4.
The copy of the jumper wire procedure itself is from 1991, and I
assume they have meanwhile these definitions updated to IPC-222x and
other newer standards.
The "lower" class has the following rules:
a) max numbers of ALL repairs, added components, jumper wires etc.
PCB size in cm^2 number
< 100: 5
100-300: 10
300-600: 15
> 600: 20
b) jumper wires and added components
< 100: 3
100-300: 6
300-600: 9
> 600: 12
The "higher" class allows no repairs.
For repair they refer to IPC-R-700 and MIL-C-28809, but mostly to
other in-house procedures.
Hope this helps.
Regards
Matthias Mansfeld
-----------------------------------------------
Matthias Mansfeld Elektronik
* Printed Circuit Board Design and Assembly
Am Langhoelzl 11, D-85540 Haar, GERMANY
Phone: +49-89-4620 0937, Fax: +49-89-4620 0938
E-Mail: [log in to unmask]
Internet: http://www.mansfeld-elektronik.de
##############################################################
TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c
##############################################################
To subscribe/unsubscribe, send a message to [log in to unmask] with following text in
the body:
To subscribe: SUBSCRIBE TECHNET <your full name>
To unsubscribe: SIGNOFF TECHNET
##############################################################
Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional
information.
If you need assistance - contact Gayatri Sardeshpande at [log in to unmask] or
847-509-9700 ext.5365
##############################################################
|
|
|