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outputs

  1. M

    Weak outputs transistors Sansui 9090db

    I have been fixing A sansui 9090db for a while now,driver board ,power supply are done unit is re-capped ,keeps going green then maybe a minute or more then goes into protection.my theory is it had weak mj21194 g's hfe was 41,46,45,53,the 93's were in the 80's hfe zone,I've replaced them...
  2. ocdecio

    Marantz 2325 2SA747 - low breakdown voltage

    I am working on the amp boards for a 2325 and checking the outputs I found one of them (A747) testing a breakdown voltage of 167V, whereas all others test 247V or so. Is that a sign that I should replace the whole set? Would replacing just the A747 with another pulled from a working unit be OK?
  3. R

    Splitting a signal

    I just noticed that on my RC-1070 there are two pairs of output terminals. Obviously one pair is going to my amplifier. It says in the manual that I can use the second pair to "drive a second power amplifier or to supply a signal to a signal processor." My goal is to send a signal from the cd...
    • r schneider
    • Thread
    • cd signal outputs
    • Replies: 7
    • Forum: DIY
  4. hertzdonut

    CR-2020 Left channel is gone, fuses popped, some troubleshooting, where to next?

    My 2020 has been working fine, no issues as a bedroom receiver. (Light use). Background info: All service bulletins were completed, as well as other repair work to bring this unit back to life, about a year ago. (With help from multiple contributors on AK!) During recent use, I heard a couple...
    • hertzdonut
    • Thread
    • cr-2020 left channel blown left channel gone left channel not working output transistor outputs
    • Replies: 9
    • Forum: Yamaha
  5. Richs_Trains

    Marantz PC board question / observation

    As I posted before I have a 2220b with a nasty power amp board, the foils were mostly non-existent from the factory and all of the components were install with the pins bent against the PC board. I purchased a used power amp board for this unit because once I worked on the old board I could not...
  6. reverend13

    Schiit Output to Powered Speakers: Which Cable/Converter?

    I have a Schitt Valhalla 2 that has RCA's for outputs to external speakers. I have two powered speakers/monitors that I would like to use on occasion, instead of using headphones all the time. I assume that the L RCA output would run to one powered speaker and the other R RCA to the other...
  7. Richs_Trains

    1090 Basket Case

    Okay, so I bought a 1090 on craigslist for $50.00 to use for parts for a 1090 that I recapped. This unit was filthy inside and someone had pulled 1 output transistor from each channel, a 588 on one side and a 618 on the other. I was just going to take the cosmetic parts I need and trash the...
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