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Old 8th January 2009, 10:55 PM   #1
rtate is offline rtate  Canada
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Default 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!!!
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Old 9th January 2009, 03:35 AM   #2
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Are you sure they're in a cradle, I seem to remember that those bigger Denons the opamps were soldered in?

Cheers George
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Old 9th January 2009, 09:52 AM   #3
rtate is offline rtate  Canada
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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!!
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Old 9th January 2009, 10:00 AM   #4
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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
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Old 9th January 2009, 12:37 PM   #5
rtate is offline rtate  Canada
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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!!!
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Old 9th January 2009, 03:34 PM   #6
tinitus is offline tinitus  Europe
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What about using heat, it works on many other things
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Old 9th January 2009, 03:37 PM   #7
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Instead up prying up on it, try a gentle twist with a pair of needle nose pliers.
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Old 9th January 2009, 07:38 PM   #8
tubee is offline tubee  Netherlands
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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.
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Old 9th January 2009, 07:48 PM   #9
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Try soaking a little fingernail polish (acetone) under the opamp, if they are "super-glued" down, this will disolve the glue.
Scott
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Old 10th January 2009, 07:52 AM   #10
tubee is offline tubee  Netherlands
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Better is to heat the opamp self with the iron and pull it up (after the 4 pin lift)
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