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  1. K

    2017 Sansui Serial Number Database

    AU-X1,219070110,Kryzpo
  2. K

    Sansui AU-X1, power supply problem.

    I recommend you start with the regulated power suply. In my case, there was a lot of glue that corroded the legs of the capacitors. Two capacitors were out of order. And, of course, replace all the black flags.
  3. K

    Sansui AU-X1, power supply problem.

    Haha, I knew it. When I finish with everything else I will upload photos.
  4. K

    Sansui AU-X1, power supply problem.

    :banana: Without the DBT the voltages read perfectly, and in fact, all voltages are perfect, and the amplifier works perfect. I thank you all very much. :banana:
  5. K

    Sansui AU-X1, power supply problem.

    No, I explained myself wrong, my English is horrible haha. Each time I have placed or removed the boards I have done with the amplifier off. I forgot to mention that the MM and MC boards measure 0mv without problem. Believe me I have read all the posts :biggrin:.
  6. K

    Sansui AU-X1, power supply problem.

    News! I put a 100-watt bulb and the voltage now went up from 38 to 42 volts. Note that the amplifier is not in protection. The LED blinks when I place the MM cards, but the relays remain active. Is it time to try without the DBT? But first, tomorrow I will look for a light bulb 120 watts...
  7. K

    Sansui AU-X1, power supply problem.

    Thank you very much! I'll put a 100-watt bulb. I checked all the connectors 10 or more times. I took a lot of photos before unplugging the cables and boards. I hope to have news soon. Regards!
  8. K

    Sansui AU-X1, power supply problem.

    Hyperion, thank you very much for your help. I checked everything I changed, all the capacitors and transistors are in the right direction. I did the following tests and I think I have news. If I keep the 2719-2918 (MC) boards in place, without MM boards, the measurements are OK. But if I...
  9. K

    Sansui AU-X1, power supply problem.

    Previously you helped me in these post: http://audiokarma.org/forums/index.php?threads/i-found-an-x1-but.776489/#post-10658635 http://audiokarma.org/forums/index.php?threads/factory-or-tech-mod-au-x1.785688/ Now, I recap the boards 2917-2918 (MC amp), 2770-2771 (MM amp), 2778 (reg power...
  10. K

    Factory or tech mod? AU-X1

    Hello! It had started with this: http://audiokarma.org/forums/index.php?threads/i-found-an-x1-but.776489/ Apparently it was repaired before, maybe twice. Many surprises, but I have not seen this before. Is it one of the many factory modifications? Thanks, as always. Greetings from Chile!
  11. K

    I found an X1, but ...

    Thanks everyone, Kale will send me the originals :)
  12. K

    I found an X1, but ...

    First, thank you for all the information gathered in this forum and for so many hours of entertainment :) I found an X1, but it had already been repaired. It works, with some buzzing at the phono input, so I plan on doing a complete overhaul. The problem is that some power transistors were...
  13. K

    30 or 300 pF?

    Thanks Duke58. I'm not the person of that thread, but like him, I can not find the problem causing the high voltage bias. Probably some resistors, but I preferred to change any suspect component. Thanks for the suggestion, but I can find the parts in my country. (I'm from Chile) :thmbsp:
  14. K

    30 or 300 pF?

    Hello. I have exactly this problem: http://audiokarma.org/forums/showthread.php?t=468096 I want to change some capacitors (C721 and C732), but I'm confused with this: 30pF? The manual says 300pF: 30pF or 300pF? (I think it should be 300, because the number 300 is underlined) Thank you...
  15. K

    Marantz 4240 repair, help please

    I forgot that this device is quad.... :scratch2: Previously, I had selected the 17x4, but I kept only the front speakers connected. :headscrat The right rear channel is weak. I have reviewed all the knobs and work well. Then I will do some tests, I guess the problem must be in the PE01...
  16. K

    Marantz 4240 repair, help please

    Hello! I'm happy because I found a problem. Are 1:30 a.m. in my country. Now I sleep a while. In a few hours will tell. Good night!
  17. K

    Marantz 4240 repair, help please

    I'm using the same speakers since I have it, I built a generic for any purpose. With them, initially worked well (before modifications). I thought it might be that the problem, then connected it to a yamaha ns-690, then I can not turn the volume up more than 1/4 without the lights go down. But...
  18. K

    Marantz 4240 repair, help please

    Thanks for your quick response. I do not know if consumption increases too much, or is the source of power that is not being able to deliver the power required (or transfo, or maybe d315 transistor, or capacitor?, the transistor d315 is not original.). If you look at the video, when the music...
  19. K

    Hello from Chile!

    Thank you all for the welcome. También a los que hablan español :yes: Me too :D
  20. K

    Marantz 4240 repair, help please

    Hi! I'm back! Thanks Tom for your help, unfortunately still can not find the problem. I can not turn the volume up more than one third, because it seems that consumption is very high. I have reviewed all the transistors and all diodes are good. I checked all connections and position of...
  21. K

    Marantz 4240 repair, help please

    Thank you! I have checked the diode you mention, seems to be good, I will change it anyway and I will check the connections again.
  22. K

    Marantz 1060 Restoration Project

    Me too :yes: Tiber63, can you help me with my problem? I think there is a problem with the power supply or transformer is bad, thanks. http://www.audiokarma.org/forums/showthread.php?t=427297
  23. K

    Hello from Chile!

    here is my post: http://www.audiokarma.org/forums/showthread.php?t=427297 Hahaha! Gracias vecino! :D
  24. K

    Marantz 4240 repair, help please

    Hi! I'm new here :yes: http://www.audiokarma.org/forums/showthread.php?t=427288 This is my first post, forgive my basic english, I'll use google translator ;) I have only basic knowledge of electronics, but enough to make a typical maintenance on this device. I found it near the...
  25. K

    Hello from Chile!

    Hello! I introduce myself. I'm from Santiago, Chile, and I really like the old hi-fi, I like to fix them and keep them safe. Sorry I'm just here to make inquiries, I would like to participate in this forum, but my english is limited. It's great this site, in my country is difficult to...
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