P2587 mono amplifier repair

Kits Audio Hi Fi Projects
1

Hello,
Does anybody here have a schematic for a Velleman P2587 mono amplifier module?

I wish to repair one that has 44Volt DC on the output. Power supply voltage is 70V.
This is an old module (late eighties? early nineties?) without housing, of about 200W rms.

Thanks!,
Mark

2

Hi marktuba

Yes we still have them! Altough we couldn’t find it in our database anymore. We found it in our archive.
I took pictures of the original schematic drawn on chalk paper :). Also the build instructions are with it so you know which transistor to use.

You can download the pictures here
downloads.velleman.be/6e93c0b152 … /K2587.zip

Best Regards,
VEL337

3

I’ve got two of these modules, with troubles. I would really like to have the schematics too. The download link doesn’t work anymore. Could you re-upload it? many thanks in advance

4

Would it be possible to reupload the pictures? The download link does not work.
I got one of these prebuilt, but not completely finished.

Also, do you have any info on them? Were they meant to be for HiFi use, PA or monitoring?

Kind regards
Stein Robert

[quote=“VEL337”]Hi marktuba

Yes we still have them! Altough we couldn’t find it in our database anymore. We found it in our archive.
I took pictures of the original schematic drawn on chalk paper :). Also the build instructions are with it so you know which transistor to use.

You can download the pictures here
downloads.velleman.be/6e93c0b152 … /K2587.zip

Best Regards,
VEL337[/quote]

5

Here you go:
downloads.velleman.be/d2ddc09042 … /K2587.zip
The link is available for 7 days.

In the pictures there’s more info about the kit.

Personally i can’t give you more info. The kit is probably older than me :slight_smile:

6

Thank you so much :slight_smile: Looking forward to finishing the build :slight_smile:

Kind regards
Stein Robert

7

Hello ,

I also have 2 of these amplifiers and would like to have the schematic and if possible the adjustments of the dc offset .
the download link does not work anymore , can you help me please ?

thanks in advance

Peter

8

I don’t have one of these but when they were posted I downloaded them.

3037
3037914Ă—630 300 KB
3038
30381001Ă—572 335 KB
3039
3039552Ă—797 311 KB
3040
3040549Ă—797 257 KB

1 Like
9

Thank you very much for this !

10

If you have a problem with the last picture let me know and I will see if I can make it a little clearer.

11

its perfect , downloaded all of them and used photo magnifier … thanks again

12

Thanks a lot!
I Had lost these in the meanwhile.
Good reminder to fix this old amp up…