The repair site is a Power FET on a .062 PCB with 4 layers.  This is the
Vcore plane.  Perhaps 1oz.

victor,

-----Original Message-----
From: Charles Caswell [mailto:[log in to unmask]]
Sent: Thursday, December 19, 2002 8:30 AM
To: [log in to unmask]
Subject: Re: [TN] PCB Repair Criteria


This is a difficult question to answer. The simple answer is none.There are
too many factors involved. Lead to hole ratio, copper weight, skill of
operator and equipment used are all variables to consider. I  have removed
and replaced a 172 pin PGA 15 times in a 15 layer board with no apparent
damage. Although I'm sure there was some degradation to the life expectancy
of the board. This board was later used as part of the flight qualification,
-40 to +85 degC severe vibe etc. and passed. I will be watching for other
replies to this one.
Charles Caswell


-----Original Message-----
From: Victor Hernandez [mailto:[log in to unmask]]
Sent: Thursday, December 19, 2002 7:55 AM
To: [log in to unmask]
Subject: [TN] PCB Repair Criteria


> Fellow TechNetters,
>
>       Can some one assist me with this question.   How man times can a PTH
> component be
safely removed before damage to the inner connections on the barrel occurs.

> Victor G. Hernandez
>

---------------------------------------------------
Technet Mail List provided as a free service by IPC using LISTSERV 1.8e
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to
[log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to
[log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/html/forum.htm for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700
ext.5315
-----------------------------------------------------

---------------------------------------------------
Technet Mail List provided as a free service by IPC using LISTSERV 1.8e
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to
[log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to
[log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/html/forum.htm for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700
ext.5315
-----------------------------------------------------

---------------------------------------------------
Technet Mail List provided as a free service by IPC using LISTSERV 1.8e
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/html/forum.htm for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315
-----------------------------------------------------