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
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
(1 MB) I'll send it to you Steven. 
time to read/erase/download it
Hello!
I know this is a old thread, but I'm also having some trouble with the powersupply in my LAB SS1300.
Is it possible that one of you could send me the service manual for the LAB SS1300? As I read in the earlier posts a few of you have it now.
Nothing is burned on the power supply boards, so it's really hard to figure out for my part. I have checked all capacitors and resistors... I think the service manual is the next step... It would save me for a lot of time, and it is really hard to get anywhere else
(I tried to send 'peranders' a message, but the system wouldn't let me)
Thank you in advance for your help!
I know this is a old thread, but I'm also having some trouble with the powersupply in my LAB SS1300.
Is it possible that one of you could send me the service manual for the LAB SS1300? As I read in the earlier posts a few of you have it now.
Nothing is burned on the power supply boards, so it's really hard to figure out for my part. I have checked all capacitors and resistors... I think the service manual is the next step... It would save me for a lot of time, and it is really hard to get anywhere else
(I tried to send 'peranders' a message, but the system wouldn't let me)
Thank you in advance for your help!
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