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au-9900

  1. KeithD

    Comparison of boards in Sansui Definition and Professional series

    A while back I looked at the service manuals to determine which boards were used in multiple units in Sansui's Definition series and Professional series: AU-9900, AU-11000, AU-20000, BA-3000, CA-3000 (did not look at the BA-5000). Also included the next generation of these units: AU-9900A...
    • KeithD
    • Thread
    • au-11000 au-20000 au-9900 au-9900a au11000a ba-2000 ba-3000 ca-2000 ca-3000
    • Replies: 5
    • Forum: Exclusively Sansui
  2. T

    Sansui AU-9900 & AU-11000 Differences

    Hello, Between the two, are there any major differences, not defined in the SM? I see only minor ones, specific to power transformers, some resistor values on the F-2630 PS board and probably some cap and resistor values on the "common parts list". Driver board and power transistors, as shown...
  3. KeithD

    Sansui AU-20000 vs AU-9900

    Looks like an AU-20000 is going to come for sale locally through a mutual friend. My Sansui gear is in my signature list. I have had an AU-9900 (that I restored) for several years. I'm wondering if there would be any sonic difference between a 20000 and a 9900? I feel like the 20000 would be...
  4. T

    Sansui AU-9900 Left Channel Low Volume/Distortion With Tone Control On

    Hello All, Picked up the attached recently. Overall in good condition, with original outputs and some caps replaced. Major issue is with the Tone control enabled, the left channel volume is very low and barely audible at about 50%. Increasing the volume some more, introduces distortion. With...
  5. KeithD

    AU-9900 Tone control static

    After recapping and replacing all transistors on the tone control boards (F-2575 midrange and F-2576 treble and bass) of my AU-9900, I am getting some low level static, mostly on the right channel. I'm wondering if there is a way to isolate whether the static is coming from the F-2575 or F-2576...
  6. Tommyboy7

    Japan Market Sansui AU-9900 Protection Circuit Starting to Act Up!

    Hi everyone, I live in Japan and I finally picked up an AU-9900 about a year ago and it's been great. Recently the protection circuit has been intermittently been cutting in and out. It might work fine for several days with no issues and on other days it just cycles on/off on/off on/off...
  7. KeithD

    AU-9900 static and hiss issue

    I'm in the process of restoring my AU-9900. It's gone well. Check on DBT then line voltage after each board. Did the F2568 regulated PS board first. Here is what was replaced. All checked out OK, so moved on to F2567 replacing e-caps. Again, all ok. Same with F2570 equalizer board...
  8. KeithD

    AU-9900 replacement parts recommendations?

    I'm starting to put together a list of parts to order from Mouser of replacement parts for my AU-9900. Everything is working fine, speaker relay was replaced by previous owner, but time to replace e-caps, trimmers, bad transistors, and other parts? There are a number of threads on this amp...
  9. S

    AU-9900 Stuck In Protect

    Continuing on from my thread about channels dropping out, I have started to recap as I was getting LOUD pops and clicks and it was then going into protection. As I was told it is resistors that cause this, I decided to start work with what I have on hand (still waiting for some backordered...
  10. KeithD

    AU-9900 Tone/filter switch dropping channel

    When the tone control/filter switch is in the tone defeat/center position or filter position, all is good. But, when I switch to Tone/filter position (to the right) the right channel drops out. I’ve used DeOxit on the switch, but that has not cleared up the issue. If it momentarily push the...
  11. KeithD

    AU-9900 how to replicate loudness switch?

    Since the AU-9900 does not have a loudness switch, I was wondering what setting on the tone controls would replicate what a loudness circuit does? Has anyone tried this on an AU-9900? I can mess around with the triple tone controls and adjust to taste, but just wondering if someone knows the...
  12. Sansui Professional Series

    Sansui Professional Series

    Top to bottom, left to right: TU-9900 BA-2000 center stack: BA-2000 CA-2000 BA-2000 TU-9900 CA-2000 right stack: AU-20000 (Definition Series) AU-11000 AU-9900 AU-11000
    • SuiDog
    • Media item
    • au-11000 au-20000 au-9900 ba-2000 ca-2000 tu-9900
    • Comments: 0
    • Category: Sansui Gallery
  13. Sansui Professional Series

    Sansui Professional Series

    Top to bottom, left to right: TU-9900 BA-2000 center stack: BA-2000 CA-2000 BA-2000 TU-9900 CA-2000 right stack: AU-20000 (Definition Series) AU-11000 AU-9900 AU-11000
    • SuiDog
    • Media item
    • au-11000 au-20000 au-9900 ba-2000 ca-2000 professional sansui series tu-9900
    • Comments: 1
    • Category: Sansui Gallery
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