• The move to the new server is done. There are some software and database maintenance updates in process. This has us passing the hat around to help out. We appreciate any donations. Seriously, even a dollar helps. The payment page may be found here - https://www.audiokarma.org/support.html

9090

  1. C

    Sansui 9090 DB Intermittent Stereo FM

    I'm having a very similar issue as this user had previously here - Sansui 9090 Fm Stereo stopped working, Fm Reception OK Doesn't look like he found a solution and I'm a bit unsure of where to start. Unit works flawlessly other than stereo reception on FM. It will work anywhere from 10 minutes...
  2. C

    Sansui 9090DB Output Problems

    Been through this 9090DB, just finished pinning and recapping the dolby board that was previously preventing sound from passing through the pre in either channel. After the pinning all modes seem to work except for one channel in rec 2 that I plan on addressing later - but importantly - off -...
  3. quadmatrix82

    Sansui 9090 service bulletin changes help

    Hi Sansui experts, I am in the process of restoring my Sansui 9090 which I’ve had in long term storage, it’s time to do the service bulletins and hoping I can get some pointers. Looks like it was made in Feb 1976. It says to remove the jumper to the L01-2 coils on the driver board F-2436-1, my...
  4. quadmatrix82

    Sansui 9090 help factory or previous repair mods?

    Hi all, I’m in the process of refurbing a Sansui 9090 I’ve had in long term storage. I’ve come across two mods which I’m not sure if I should replicate in the restoration or bring back to original design and hoping someone can help Last I used this was over a decade it worked however always had...
  5. cykotic

    Sansui 9090DB Dial Lights Out After LED Upgrade to Power Meters

    I am in the process of upgrading all of the incandescent lamps to LED. The Dial lights and Signal and Tuner lights turned out beautiful. I then upgraded the left and right Power Meter lamps to LED and now have NO lights on anywhere. I must say that changing the lamps in the Power Meters were a...
  6. J

    Sansui 9090 F-2436 board.

    I'm drawing up a PCB to replace an F-2436 board in a 9090 I salvaged from the dump. It works fine as a pre-amp so there's hope for it , but there's no driver board so I need to make one . I have a couple of queries , the first being a request for a sketch or dimensions of the board , so I can...
  7. tutor_turtle

    9090 no bias current one channel

    I fixed the bias issue (2sc984 bias control x-stor was bad) I have a 9090 (not db) that came in for shorted outputs (in protection). Rebuilt the driver board, replaced the outputs. Comes out of protection, bias and offset are good, but I don't get a green light. Sound quality is good. Pulled the...
  8. Brandon1250

    Sansui 990db/9090db DC on output

    Hello all. I’m kinda in a situation that has me completely confused with this 990db I have. Getting right to it; This unit was given to me with absolutely no back story. Got it to the point where I felt confident plugging it in and putting it on the dim bulb tester. No smoke but of course...
  9. Eunomians

    AR-XA RCA wiring

    I've had my XA for a very long time, and it runs great. I recently made a large batch of custom Mogami interconnects for my stuff at home. As it turns out, I have some cable left. My AR-XA still has the original RCA cables, so I thought that I'd make a custom set to replace it. I don't want...
    • Eunomians
    • Thread
    • 9090 ar-xa mogami 2549 sansui turntable
    • Replies: 11
    • Forum: Turntables
  10. Eunomians

    Sansui 9090 and fuses

    I’ve had my 9090 for a long time - and I had a terrific AK member CDfixer restore and upgrade mine (RIP CDfixer, he was a true gent and I’m very lucky to have met him). One thing that I’ve noted is that my unit has the updated fuses (pic shows two 10a fuses). A few questions: should I change...
    • Eunomians
    • Thread
    • 9090 9090 receiver fuse monster sansui
    • Replies: 3
    • Forum: Solid State
  11. S

    Sansui 9090 recap and restoration

    Hi everyone, I’m new around here, and recently bought a Sansui 9090 (not DB) in unrestored condition. Who are considered the best folks to do the recap/restore? Appreciate the suggestions.
  12. Richard P

    Sansui 7070 Tuner Board (F-2614) Missing RFTransformer

    I'm bringing a clean 7070 back to life and am getting close to firing it up - just waiting on the new output transistors and some fuses to arrive - but I've run into a possible issue with the tuner board (F-2614). One of the FM discriminator transformers appears to be missing - T03. The...
  13. E

    Found a Sansui 9090db in a bulk collection pile need some help! :)

    Howdy everyone! It was working yesterday, and for part of today. what I noticed was the sound to the speakers was working intermittently, then poof, no sound. I also found a Pioneer PL560 which would play albeit quietly. I figured being plugged into phono, it wouldn't need a preamp. So today...
  14. S

    Help! 9090 protection issues - flashing red

    Hi Sansui lovers. Please could someone help with my 9090? Iam in the UK where techs are hard to come by! I have a beautiful 9090 that won't come out of protection even with the driver board removed. I've replaced c01, c02, c03, tr02, tr01 and the relay so far. The relay does latch at first but...
  15. KeithD

    Scratchy volume pot on 9090

    I used Deoxit on the volume pot of my 9090 a couple of years ago, but never got rid of all the scratchiness at the low volume end to my satisfaction. It's been a bit worse lately for lack of use. Question, can the volume pot on the 9090 be disassembled to do a real cleaning of the contacts...
  16. Devileyes

    Am I checking the Bias right? Sansui 990

    My 990 has been running hot since I bought it a few months ago. It’s been recapped and had the trim pots replaced by the dude who I bought it from. Anyway I checked the DC offset first, using the SM and the sticky thread. RC was 37.0 and LC was 8.9. I adjusted those both down to as close to 0...
  17. pinplayers

    Sansui 9090 no FM stereo

    Hello I was hoping for some guidance on an issue I’m having with my 9090. First some quick back ground. When I purchased the unit it was working with the exception of the Indicator lights for FM and Phono. I can’t recall if the FM Stereo work at that time or not. I decided to recap and clean...
  18. F

    Brand spanking new with a dead 9090

    Greetings all: First off I am not a technical guy but a vintage stereo and classic rock lover. I bought an old Kenwood at a garage sale and I love it. I finally decided I would treat myself to a top shelf vintage receiver. Looked at several. Found a Sansui 9090(not the db) on craigslist. Drove...
  19. markkb

    9090 DC spikes on outputs and speakers solved

    I was getting occasional zap-thwat-switht-zpfft sounds from my right channel audible through my speakers. It eventually got to be too frequent to ignore, and I pulled the 9090 out. I checked the bias and DC offset, during the DC offset check I observed the current spiked up on the voltmeter...
  20. Jcamp

    Sansui 9090 Driver Board

    Hello, Have a beautiful 9090 that unfortunately is missing its driver board F-2436. I know I am dreaming but does anyone know where I could find one or contact someone that can get a bare pcb made? 9090 by Jcamp posted Apr 1, 2019 at 6:04 PM Thanks :)
    • Jcamp
    • Thread
    • 9090 f-2436 f2436 pcb sansui sansui 8080 sansui 9090 sansui9090
    • Replies: 6
    • Forum: Solid State
  21. RobertCO

    9090 repair advice needed

    Just picked up this 9090 for a reasonable price. Right channel was out, turned out the fuse in the plastic cover on the driver board was blown. Replaced it with a 125V 6A fast blow and wow, this thing sounds incredible. I was able to adjust the DC offset to zero (was at 0.012) pretty easily...
  22. G

    9090 Driver Board Transistors

    Hey all, I am in the middle of restoring a 9090. This is my first effort to restore anything so I am learning as I go. I have done a fair bit of reading earlier on 9090 threads but still have a few questions regarding the driver board, 2436. What I have done (on this board): - Replaced...
  23. D

    Sansui 9090 Red Protection Light

    Hello All, First time poster on AK (longtime lurker!). I just got a 9090 (not a 9090db) from a thrift shop, so not sure about its history. Was definitely in a smoker's house due to tar all over it. VERY dusty/dirty inside so I vacuumed it out and did basic clean up. Got the dial lights working...
  24. Johnny_Law

    9090 Static / Current at Idle into Protection SOLVED

    EDIT: Solution was to replace TR01-TR04 (2SC1708) on driver board with KSC1845. Each measured OK using multimeter but would heat up during operation and introduce much noise into the signal path. After extensive searching and not finding this exact issue ... here goes. I have a 9090 that goes...
  25. aqualogic

    Sansui 9090 Fm Stereo stopped working, Fm Reception OK

    FM reception is fine only the stereo reception and related indicator recently stopped. Similar but not exact issues have been mentioned in past posts, but nothing exactly like I've experienced here, so I wanted to try & get some fresh help. My trusty 9090, not DB, has worked fine for decades...
Back
Top Bottom