Help removing opamps!!

rtate · 8th January 2009, 10:55 PM

I'm trying to remove the I/V opamps in my Denon dvd 2900 but they are not co-operating.

The buffer opamps came off ok but the I/V pieces seem to be
krazy glued down or somthing!!!

I'm looking for some tips on how to remove these before I do some Damage!!!!

HELP!!!

georgehifi · 9th January 2009, 03:35 AM

Are you sure they're in a cradle, I seem to remember that those bigger Denons the opamps were soldered in?

Cheers George

rtate · 9th January 2009, 09:52 AM

They are soldered in....

I have used solder wick and lifted the pins. The others all seemed to have a tiny bit of glue or domething holding them to the board, however this one seems to have a lot more adheason and I'm afraid i might damage the board prying it off!!

georgehifi · 9th January 2009, 10:00 AM

Your changing them right? Time to send them to God.
Just cut all the legs and rip the opamp off then remove the legs one at a time, it sound like it may be a plate through board and you think it is desoldered.
Cheers George

rtate · 9th January 2009, 12:37 PM

I am changing the opamps to getter ones...

I'm sure it's not plate through and I have lifted all 8 legs.
The body is glued to the board and I can't seem to get anything under it to pry it up.
Is there a special tool to lift the opamps?

When i removed the other opamps on the same board I found signal traces under the body and I'm afraid ir I pry to hard I may pull the traces off the board!!!

tinitus · 9th January 2009, 03:34 PM

What about using heat, it works on many other things

theAnonymous1 · 9th January 2009, 03:37 PM

Instead up prying up on it, try a gentle twist with a pair of needle nose pliers.

tubee · 9th January 2009, 07:38 PM

Just swapped some smd opamps from my dvd player:

Bend a small L shaped hook on a needle (soft burned in a flame) Heat each pin of oa and lift pin up with the custom hook. When you lifted the 4 pins on 1 side lift whole opamp. Bend opamp few times and so break off the other 4 pins. Remove excess solder/pin remains with wick.

SVinzant · 9th January 2009, 07:48 PM

Try soaking a little fingernail polish (acetone) under the opamp, if they are "super-glued" down, this will disolve the glue.
Scott

tubee · 10th January 2009, 07:52 AM

Better is to heat the opamp self with the iron and pull it up (after the 4 pin lift)

8th January 2009, 10:55 PM	#1
rtate diyAudio Member Join Date: Jan 2002 Location: Burlington, Ontario, Canada	Help removing opamps!! I'm trying to remove the I/V opamps in my Denon dvd 2900 but they are not co-operating. The buffer opamps came off ok but the I/V pieces seem to be krazy glued down or somthing!!! I'm looking for some tips on how to remove these before I do some Damage!!!! HELP!!!

9th January 2009, 03:35 AM	#2
georgehifi diyAudio Member Join Date: Sep 2003 Location: Manly Australia (Jewel of the Pacific)	Are you sure they're in a cradle, I seem to remember that those bigger Denons the opamps were soldered in? Cheers George __________________ Avatar : Production Lightspeed Attenuator www.lightspeedattenuator.com

9th January 2009, 10:00 AM	#4
georgehifi diyAudio Member Join Date: Sep 2003 Location: Manly Australia (Jewel of the Pacific)	Your changing them right? Time to send them to God. Just cut all the legs and rip the opamp off then remove the legs one at a time, it sound like it may be a plate through board and you think it is desoldered. Cheers George __________________ Avatar : Production Lightspeed Attenuator www.lightspeedattenuator.com

9th January 2009, 03:37 PM	#7
theAnonymous1 diyAudio Member Join Date: Feb 2004 Location: Anonymityville	Instead up prying up on it, try a gentle twist with a pair of needle nose pliers. __________________ "If you don't like funerals don't kick sand in Ninja's face." - Ninja

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9th January 2009, 09:52 AM	#3
rtate diyAudio Member Join Date: Jan 2002 Location: Burlington, Ontario, Canada	They are soldered in.... I have used solder wick and lifted the pins. The others all seemed to have a tiny bit of glue or domething holding them to the board, however this one seems to have a lot more adheason and I'm afraid i might damage the board prying it off!!

9th January 2009, 12:37 PM	#5
rtate diyAudio Member Join Date: Jan 2002 Location: Burlington, Ontario, Canada	I am changing the opamps to getter ones... I'm sure it's not plate through and I have lifted all 8 legs. The body is glued to the board and I can't seem to get anything under it to pry it up. Is there a special tool to lift the opamps? When i removed the other opamps on the same board I found signal traces under the body and I'm afraid ir I pry to hard I may pull the traces off the board!!!

9th January 2009, 03:34 PM	#6
tinitus diyAudio Moderator Join Date: Nov 2005	What about using heat, it works on many other things

9th January 2009, 07:38 PM	#8
tubee diyAudio Member Join Date: Jul 2004 Location: Netherlands	Just swapped some smd opamps from my dvd player: Bend a small L shaped hook on a needle (soft burned in a flame) Heat each pin of oa and lift pin up with the custom hook. When you lifted the 4 pins on 1 side lift whole opamp. Bend opamp few times and so break off the other 4 pins. Remove excess solder/pin remains with wick.

9th January 2009, 07:48 PM	#9
SVinzant diyAudio Member Join Date: May 2005 Location: QCA, IL	Try soaking a little fingernail polish (acetone) under the opamp, if they are "super-glued" down, this will disolve the glue. Scott

10th January 2009, 07:52 AM	#10
tubee diyAudio Member Join Date: Jul 2004 Location: Netherlands	Better is to heat the opamp self with the iron and pull it up (after the 4 pin lift)

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