I find that for me wire wrap wire works well for small jumpers since it comes pre-insulated. Since 2389 and and 2429 appear to be connected I would come off of pin 1 of 2429 route it around 2428 and come in on the diagonal to U139 pin 17 and lightly glue the jumper to the board.
I think this would give a cleaner appearance than the more direct route. One could even come across the pin 1's of 2429 and 2389 if desired. As for the other mod with the inductor I think a small board backed solder pad would do well here, it would give a slightly larger area to work with and they could be premade and just glued on and soldered.
Pat Goodyear
Control Technician
Pacific Gas and Electric DCPP
805.545.4312
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Linda Langley
Sent: Tuesday, August 02, 2011 5:05 AM
To: [log in to unmask]
Subject: Re: [TN] Rework from cut and jump
I have done this type of modification before, if you use 30aug wire will make a big difference.
Linda Langley CIT
Training Specialist
Adco Circuits
248.829.4697
fax 248.853.6698
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Thayer, Wayne - IIW
Sent: Monday, August 01, 2011 11:31 PM
To: [log in to unmask]
Subject: Re: [TN] Rework from cut and jump
Use a smaller gauge wire! 38G probably just right.
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Steve Gregory
Sent: Friday, July 29, 2011 6:53 PM
To: [log in to unmask]
Subject: Re: [TN] Rework from cut and jump
Hi Frank,
I have your doc posted here:
http://stevezeva.homestead.com/Rework_Instructions.doc
Looks like you're dealing in some tight quarters there, it really makes things tough. Doesn't help that there are all of them unmasked vias around either. Is the IC a QFN? I don't see any leads coming off it. Don't know what the application is, so I can't comment on the suitability of this solution. Generally from my experience, the customer is the customer, and whatever solution is decided on, both the vendor and the customer need to buy into it. and that's where having a real partnership with each other makes a huge difference when trying to work through situations like this.
Nobody likes to have to resort to such measures as this, but shi...I mean stuff, happens.
We've done some crazy things here. One of the latest ones was this:
http://stevezeva.homestead.com/Crazy_Mod_Inst.jpg
These were the instructions from our customer, and in all fairness they asked first if we could do this. All we could do is tell them that we would try. Take note that these are 0402's. It looked kinda' feasible on paper.
But what we didn't take into account was that the 120nH inductor was a Coilcraft part with bottom only terminations. Below is what we wound-up
doing:
http://stevezeva.homestead.com/Crazy_Mod_Done.jpg
This is where having good, and I mean good, rework technicians is absolutely priceless. I am constantly amazed at what our technicians can accomplish. A similar mod had to be done at another location on the board, and thank goodness we didn't have to do this on too many boards. As far as I know this worked, and our customer was grateful.
Steve
-----Original Message-----
From: Frank Kimmey
Sent: Friday, July 29, 2011 4:36 PM
To: [log in to unmask]
Subject: [TN] Rework from cut and jump
I have asked Steve G to post a rework file for me.
Our customer seems to dislike the white wire approach.
Can anyone offer a more elegant solution?
Please feel free to contact me offline if you are looking for the business.
Any suggestions will be appreciated
Thanks,
FNK
Frank N Kimmey CID+
Manager - PCB Design
Powerwave Technologies Inc
Mobile - 916-670-0645
______________________________________________________________________
This email has been scanned by the MessageLabs Email Security System.
For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________
---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 16.0 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 For additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
-----------------------------------------------------
______________________________________________________________________
This email has been scanned by the MessageLabs Email Security System.
For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________
---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 16.0 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 For additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
-----------------------------------------------------
This e-mail and any files transmitted with it may be proprietary and are intended solely for the use of the individual or entity to whom they are addressed. If you have received this e-mail in error please notify the sender.
Please note that any views or opinions presented in this e-mail are solely those of the author and do not necessarily represent those of ITT Corporation. The recipient should check this e-mail and any attachments for the presence of viruses. ITT accepts no liability for any damage caused by any virus transmitted by this e-mail.
______________________________________________________________________
This email has been scanned by the MessageLabs Email Security System.
For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________
---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 16.0 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 For additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
-----------------------------------------------------
______________________________________________________________________
This email has been scanned by the MessageLabs Email Security System.
For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________
---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 16.0 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 For additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
-----------------------------------------------------
______________________________________________________________________
This email has been scanned by the MessageLabs Email Security System.
For more information please contact helpdesk at x2960 or [log in to unmask]
______________________________________________________________________
---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 16.0
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
For additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
-----------------------------------------------------
|
