shaun Posted February 16, 2006 Report Share Posted February 16, 2006 my jen's not well.can anybody help? Quote Link to comment Share on other sites More sharing options...
spellchecker Posted February 16, 2006 Report Share Posted February 16, 2006 what are the symptoms?have you any idea what is wrong with it? which stage is malfunctioning?i'd hand it to an electronics engineer or someone similar before going anywhere near a local music shop.if it's really precious to you there are places you could probably send it, funky junk in london springs to mind.http://www.proaudioeurope.com/ Quote Link to comment Share on other sites More sharing options...
shaun Posted February 17, 2006 Author Report Share Posted February 17, 2006 some of the pots seem real crackly and just recently when i switch the octave to 8' and 4' no sound is produced.it's rubbish. Quote Link to comment Share on other sites More sharing options...
shaun Posted February 21, 2006 Author Report Share Posted February 21, 2006 1 Quote Link to comment Share on other sites More sharing options...
Guest MKII Posted February 21, 2006 Report Share Posted February 21, 2006 Before you bury it, see if you can track down the schematics for it. Quote Link to comment Share on other sites More sharing options...
shaun Posted February 21, 2006 Author Report Share Posted February 21, 2006 it's not totally dead. though, i did have a scare when i wouldn't go on for about 5 hours.the same problems now still persist. Quote Link to comment Share on other sites More sharing options...
Guest MKII Posted February 21, 2006 Report Share Posted February 21, 2006 What is the exact make and model? Quote Link to comment Share on other sites More sharing options...
shaun Posted February 21, 2006 Author Report Share Posted February 21, 2006 jen sx1000The Synthetone SX-1000 is an old Italian basic mono-synth. It has a single analog DCO with three waveforms: sawtooth, square, and PWM (Pulse Width Modulation). There is an analog filter (12dB/octave) with cutoff, resonance, and LFO modulation. There is also a simple ADSR envelope for shaping your sounds. In addition there are also white/pink noise generators a glide effect and a vibrato effect. It's known for fairly stable tuning too. Probably its best sounds are the lead ones, the basses aren't that deep but it sure can scream! Quote Link to comment Share on other sites More sharing options...
Guest MKII Posted February 21, 2006 Report Share Posted February 21, 2006 Well, download the schematic and get someone electronically minded to have a look at it: http://www.etek.chalmers.se/~e5he/jen/jen.jpg Quote Link to comment Share on other sites More sharing options...
spellchecker Posted February 21, 2006 Report Share Posted February 21, 2006 You could also try Kenton Electronics, they used to retrofit modifications to your kind of synth. They may be able to service it for you.http://www.kentonuk.com Quote Link to comment Share on other sites More sharing options...
Compuphonic Posted February 22, 2006 Report Share Posted February 22, 2006 You could also try Kenton Electronics' date=' they used to retrofit modifications to your kind of synth. They may be able to service it for you.[url']http://www.kentonuk.comThe guys at Kenton don't do repairs.There is a good chance the problem you are having is simply down to a faulty pot.Looking at the schematic the pot is the only common component before the 301 Opamp, and likely if the Opamp had a problem you would get no sound at all.Although I'm slightly puzzled as the post below says the SX-1000 has a single DCO and the schematic posted looks like a VCO so maybe thats the wrong schematic ? Quote Link to comment Share on other sites More sharing options...
Guest lime ruined my life Posted February 22, 2006 Report Share Posted February 22, 2006 what does the d stand for in dco? is it digital? Quote Link to comment Share on other sites More sharing options...
Compuphonic Posted February 22, 2006 Report Share Posted February 22, 2006 what does the d stand for in dco? is it digital?Yes, although there are a number of different digital methods that are commonly used - most common being some sort of microprocessor control.VCO = voltage controlled osc, usually using some sort of discreet or opamp based feedback loop to generate Quote Link to comment Share on other sites More sharing options...
Guest Tam o' Shantie Posted February 22, 2006 Report Share Posted February 22, 2006 The guys at Kenton don't do repairs.Although I'm slightly puzzled as the post below says the SX-1000 has a single DCO and the schematic posted looks like a VCO so maybe thats the wrong schematic ?The sound was generated by a single oscillator, described on the control panel and the voice cards (see box below) asa VCO, but by previous writers as a DCO. The truth is that it was a strange halfway house that was neither entirely voltage-controlled nor digitally controlled. It worked something like this... The oscillator itself was a high-frequency square-wave generator, stabilised by a digital circuit. So far, so DCO. The output from this was passed to a large 40-pin chip (which would now be almost impossible to replace) which shaped the wave into a wider selection of waveforms and divided it down to the standard range of audio frequencies. But what about the 'Fine Tune' control on the top panel? This, indeed, was a standard voltage control that affected the frequency of the high-frequency oscillator. The range of its affect was rather small but it was, nonetheless, a voltage control. Quote Link to comment Share on other sites More sharing options...
spellchecker Posted February 23, 2006 Report Share Posted February 23, 2006 The sound was generated by a single oscillator' date=' described on the control panel and the voice cards (see box below) asa VCO, but by previous writers as a DCO. The truth is that it was a strange halfway house that was neither entirely voltage-controlled nor digitally controlled. It worked something like this... The oscillator itself was a high-frequency square-wave generator, stabilised by a digital circuit. So far, so DCO. The output from this was passed to a large 40-pin chip (which would now be almost impossible to replace) which shaped the wave into a wider selection of waveforms and divided it down to the standard range of audio frequencies. But what about the 'Fine Tune' control on the top panel? This, indeed, was a standard voltage control that affected the frequency of the high-frequency oscillator. The range of its affect was rather small but it was, nonetheless, a voltage control.[/quote']in context:http://www.gordonreid.co.uk/vintage/sx1000.html Quote Link to comment Share on other sites More sharing options...
shaun Posted February 23, 2006 Author Report Share Posted February 23, 2006 anybody here familiar with electronics who wants to take a look at it?cash reward. Quote Link to comment Share on other sites More sharing options...
shaun Posted April 18, 2006 Author Report Share Posted April 18, 2006 okay, now the keys are completely irresponive. what a nightmare!i've found this place for repairshttp://synthrestore.co.uk/anybody familiar with them or does anybody have any other resources? Quote Link to comment Share on other sites More sharing options...
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