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Old 12th October 2008, 08:12 PM   #1
Steven is offline Steven  Netherlands
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Default Lab.gruppen SS1300

Dear colleagues,

I just got a Labgruppen SS1300 amplifier from a friend for repair. It seems some parts of the SMPS went up in smoke. After removing the top cover a very nasty smell came out of the unit, although the amp blew already a month ago. My friend also gave me a working unit for comparison, but I still think that having a schematic diagram would help a lot. This is not a traditional amplifier. Well, maybe the amp is, but the power supply is not. It uses a very big SMPS transformer for its rated power (2x 650W).
I searched a bit around but found not much useful, but I did find a link with some photo's: http://www.minhembio.com/Fredsarme/208017/
The PCB that is on the last picture in that link at the bottom right is burned in my amplifier. On this PCB there seems to be only the mains rectification and filtering, although on the same PCB also some secondary parts seem to be there. Actually the whole SMPS is divided over two boards with the transformer in between.
My PCBs are a bit different from the ones on the photos, especially the one bottom left in last photo, with the heatsink on. Mine does not have an alu resistor but several cemented resistors instead.

Can anyone help?

Steven
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The Analog Art shows no sign of yielding to the Dodo's fate. The emergence and maturation of monolithic processing finesse has perhaps lagged a bit behind the growth of the Binary Business. But whereas digital precision is forever bounded by bits, there is no limit excepting Universal Hiss to the ultimate accuracy and functional variety of simple analog circuits. - Barry Gilbert, 1973
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Old 13th October 2008, 05:09 AM   #2
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Try contact peranders in this forum. As I recall he's doing some work for them. He might be able to provide the schematics.
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Old 16th October 2008, 04:43 AM   #3
Electrons are yellow and more is better!
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I have used my connections and I'm waiting for the result.
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Old 16th October 2008, 05:26 AM   #4
Steven is offline Steven  Netherlands
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Per,

Great! Thank you for your your efforts.

Steven
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The Analog Art shows no sign of yielding to the Dodo's fate. The emergence and maturation of monolithic processing finesse has perhaps lagged a bit behind the growth of the Binary Business. But whereas digital precision is forever bounded by bits, there is no limit excepting Universal Hiss to the ultimate accuracy and functional variety of simple analog circuits. - Barry Gilbert, 1973
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Old 17th October 2008, 11:01 AM   #5
Electrons are yellow and more is better!
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I have got the service manual. (1 MB) I'll send it to you Steven.
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Old 19th October 2008, 12:50 PM   #6
Steven is offline Steven  Netherlands
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Received!


Steven
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The Analog Art shows no sign of yielding to the Dodo's fate. The emergence and maturation of monolithic processing finesse has perhaps lagged a bit behind the growth of the Binary Business. But whereas digital precision is forever bounded by bits, there is no limit excepting Universal Hiss to the ultimate accuracy and functional variety of simple analog circuits. - Barry Gilbert, 1973
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Old 19th October 2008, 04:28 PM   #7
MiiB is offline MiiB  Denmark
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Per would you mind sending med the info as well.. I also have a defective adyton opera.. do you also have info on this as i belive there was some commom tings between lab-gruppen and adyton

Thanks

michael břrresen
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Old 19th October 2008, 05:06 PM   #8
Electrons are yellow and more is better!
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Send me a message

Sorry, I don't have any more info.
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Old 19th October 2008, 07:37 PM   #9
Electrons are yellow and more is better!
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Mr. Břrresen, your mailbox is full, should gigabytes time to read/erase/download it
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Old 19th October 2008, 09:44 PM   #10
Electrons are yellow and more is better!
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Mr. Břrresen, all my email accounts are protected against spam and this mean that my mailserver sends an email to you asking you to verify yourself. This means that your mailbox can't be full! You must use a fully working email account.
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