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blown output transistors

  1. T

    sony hp-210a repair help.

    I have a sony hp-210a all in one system that has some issues with the power amplifier section. 3 of the 4 power transistors are shorted to ground and the resistors directly in line with the top two got completely toasted. I ordered some replacement d291 transistors from alie and I am checking...
    • TrevorBarten
    • Thread
    • all in one amplifier blown output transistors help repair sony
    • Replies: 5
    • Forum: Solid State
  2. rickl

    Citation 22 output transistors needed

    I'm trying to bring back a dead 22. I've narrowed down the problem to the outputs and drivers. I need: Q439 2SC3298A, NPN Q437 2SA1306A, PNP Q441,Q443 2sc3907, NPN Q449,Q451 2SA1516, PNP a search suggested 2SA1516 / 2SC3907 can be replaced with 2SA1962 / 2SC5242 for a big yamaha. Is this...
    • rickl
    • Thread
    • blown output transistors citation 22 harman kardon power amp
    • Replies: 5
    • Forum: Solid State
  3. T

    JVC RX-503BK Blown Channel, But WHY...?

    Hey folks so I have this old JVC stereo receiver that has been sitting around for years because the main fuse kept blowing. So I finally took the time to investigate and surprisingly I found that the output transistors on the left channel were blown. Now I really have no idea what I'm doing and...
    • Troy Kilian
    • Thread
    • blown channel blown output transistors jvc
    • Replies: 6
    • Forum: DIY
  4. r_electronic

    Pioneer vsx 5600 blown outputs

    Hello, I recently required an early 90s pioneer vsx 5600 receiver. The guy I got it from said it stopped working one day and the unit did not make a second click when powering on (speaker protection relay). I know he ran like 11 speakers on this poor 5 channel receiver. Main output transistors...
    • r_electronic
    • Thread
    • blown output transistors pioneer vsx receiver repair repair help
    • Replies: 5
    • Forum: Pioneer Audio
  5. jdg123

    good advice

    I have taken on one of my biggest projects ever, a blown Sansui AU-919. I have cleaned it up, replaced all the electrolytics and black flag caps and the output transistors with 2sa2223A and 2sc6145A. There was only one obvious thing wrong with the amp upon tear-down: one of the emmitter...
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