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Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: outlawal2 on April 11, 2018, 10:53:03 PM

Title: How to verify if recapped or no...
Post by: outlawal2 on April 11, 2018, 10:53:03 PM
Title says it all.. I have seen this mentioned all over the place for years and it just hit me that I *think* my A1200 has been recapped but not really certain..   And don't know how you can tell..

Any wisdom from the AMIGA GURUS here?
Title: Re: How to verify if recapped or no...
Post by: Methuselas on April 12, 2018, 02:57:56 AM
Unless it has a sticker from ASCII assume it wasn't recapped. ;)
Title: Re: How to verify if recapped or no...
Post by: Vlabguy1 on April 12, 2018, 05:04:37 AM
Quote from: outlawal2;838414
Title says it all.. I have seen this mentioned all over the place for years and it just hit me that I *think* my A1200 has been recapped but not really certain..   And don't know how you can tell..

Any wisdom from the AMIGA GURUS here?


Unless you do it yourself you wont know for certain.
Title: Re: How to verify if recapped or no...
Post by: Acill on April 12, 2018, 05:16:56 AM
Take some good pictures of it and I will let you know. I can tell by the soldering and the brand of the caps used in it. The clearer the better
Title: Re: How to verify if recapped or no...
Post by: Oldsmobile_Mike on April 12, 2018, 12:21:10 PM
Quote from: Methuselas;838415
Unless it has a sticker from ASCII assume it wasn't recapped. ;)


:hammer:
Title: Re: How to verify if recapped or no...
Post by: outlawal2 on April 12, 2018, 07:34:56 PM
Quote from: Acill;838418
Take some good pictures of it and I will let you know. I can tell by the soldering and the brand of the caps used in it. The clearer the better


Thanks for the reply (And thanks to ALL replies by the way)

Any particular part of the board I should be capturing? (Sorry, I am not an electrical guy so I really don't know what I am looking for)

Just a decent pic of the entire board or is there a location in particular to zoom on?
Title: Re: How to verify if recapped or no...
Post by: Chucky on April 12, 2018, 09:07:26 PM
Quote from: outlawal2;838434
Thanks for the reply (And thanks to ALL replies by the way)

Any particular part of the board I should be capturing? (Sorry, I am not an electrical guy so I really don't know what I am looking for)

Just a decent pic of the entire board or is there a location in particular to zoom on?


the area close to the rf modulator, the area close to the audioports..
Title: Re: How to verify if recapped or no...
Post by: outlawal2 on April 12, 2018, 10:07:48 PM
Quote from: Chucky;838439
the area close to the rf modulator, the area close to the audioports..

Thanks!
Title: Re: How to verify if recapped or no...
Post by: outlawal2 on April 12, 2018, 10:57:34 PM
OK pics attached..
Thanks for the help
Title: Re: How to verify if recapped or no...
Post by: Acill on April 13, 2018, 12:17:15 AM
Quote from: outlawal2;838445
OK pics attached..
Thanks for the help


100% sure its never been recap. Its got the originals in it.
Title: Re: How to verify if recapped or no...
Post by: mindprober on April 13, 2018, 12:50:39 AM
I should have thought of this sooner.

I have enclosed a photo of my NTSC A1200 near the RF modulator. I can see that my caps have different values, although there are similar in appearance. This is from a Rev 1D.3 board.

Am I already recapped?
Title: Re: How to verify if recapped or no...
Post by: Acill on April 13, 2018, 02:11:14 AM
Quote from: jdryyz;838447
I should have thought of this sooner.

I have enclosed a photo of my NTSC A1200 near the RF modulator. I can see that my caps have different values, although there are similar in appearance. This is from a Rev 1D.3 board.

Am I already recapped?

Same values, just diffrent voltage. Its okay for voltage to be a bit higher or lower, as long as its within the range still. The uF  no, needs to be the same. You look to have the stock caps in an NTSC model too. The Shoei ones are at least.
Title: Re: How to verify if recapped or no...
Post by: mindprober on April 13, 2018, 02:23:40 AM
Sorry, I mistyped that. Meant to say it had numbers that differed from the other poster.

I thought they looked similar enough to be considered stock also. Good to know.


Quote from: Acill;838452
Same values, just diffrent voltage. Its okay for voltage to be a bit higher or lower, as long as its within the range still. The uF  no, needs to be the same. You look to have the stock caps in an NTSC model too. The Shoei ones are at least.
Title: Re: How to verify if recapped or no...
Post by: Chucky on April 13, 2018, 06:27:25 AM
Those caps sure looks original.  and some joints even look greyish having leakageissues.
Title: Re: How to verify if recapped or no...
Post by: Djole on April 13, 2018, 07:42:27 AM
Quote from: jdryyz;838447
I should have thought of this sooner.

I have enclosed a photo of my NTSC A1200 near the RF modulator. I can see that my caps have different values, although there are similar in appearance. This is from a Rev 1D.3 board.

Am I already recapped?


The big blue cap seems bulged, or its just the angle of the photo....
Title: Re: How to verify if recapped or no...
Post by: Methuselas on April 13, 2018, 02:32:43 PM
Quote from: Oldsmobile_Mike;838422
:hammer:

Was I wrong? The Lord has spoketh. The beast was not defeated by the mighty ASCII. :roflmao:


All joking aside, those look like the originals. I'm with ASCII on this. Then again, I won't confirm. I haven't seen the insides of a 1200 for 18 years.
Title: Re: How to verify if recapped or no...
Post by: mindprober on April 13, 2018, 02:44:31 PM
Think you might be right but the angle is doing something.

I'm going to crack open the case and take a closer look.

Quote from: Djole;838460
The big blue cap seems bulged, or its just the angle of the photo....
Title: Re: How to verify if recapped or no...
Post by: mindprober on April 13, 2018, 02:52:21 PM
Were you referring to my photo or the previous post?

If mine, it could be due to dust. I took this photo a while back before I did some cleaning.

I will have get some better photos when I open the case again.


Quote from: Chucky;838458
Those caps sure looks original.  and some joints even look greyish having leakageissues.
Title: Re: How to verify if recapped or no...
Post by: mindprober on April 15, 2018, 04:12:57 PM
The reason C237 appears to be bulging is due to the curved line on top. You can see it easier in the second photo. The surface is flat, however.
Title: Re: How to verify if recapped or no...
Post by: mindprober on April 15, 2018, 05:06:51 PM
How in the world do you get access to this cap? It is very close to the keyboard connector.
Title: Re: How to verify if recapped or no...
Post by: Chucky on April 15, 2018, 05:21:23 PM
Quote from: jdryyz;838517
How in the world do you get access to this cap? It is very close to the keyboard connector.


https://www.youtube.com/watch?v=5DB56v_p80k (https://www.youtube.com/watch?v=5DB56v_p80k)


this is how I does it
Title: Re: How to verify if recapped or no...
Post by: mindprober on April 15, 2018, 05:51:13 PM
Nice work!

I see that removing part of the keyboard connector gives you some more room to work with.  :D

In some ways, working with surface mount components is easier provided you have the right tools. I do not have a heat gun or a fine tip soldering iron with precise temp controls, however.

I'm surprised the heat gun did not cause damage to the keyboard connector. Guess you just have to be careful.
Title: Re: How to verify if recapped or no...
Post by: Chucky on April 15, 2018, 08:14:37 PM
Quote from: jdryyz;838519
Nice work!

I see that removing part of the keyboard connector gives you some more room to work with.  :D

In some ways, working with surface mount components is easier provided you have the right tools. I do not have a heat gun or a fine tip soldering iron with precise temp controls, however.

I'm surprised the heat gun did not cause damage to the keyboard connector. Guess you just have to be careful.


thin nozzle, 260-280 degrees an careful.  yeah