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transistor

  1. A

    2SC871 (E,F) sub for Sansui AU-101

    Hi I'm working on an amp with a noise problem. Some helpful threads have helped me identify BC550 as a possible sub for the x-sistors I think are the problem, eg: https://audiokarma.org/forums/index.php?threads/top-ten-worst-transistors-noisy-failure-prone-whatever-and-replacements.731653/ I...
  2. F

    Sansui 6060 - output transistor orientation

    Recently acquired a 6060 in a few pieces. This is the later version with the F-2701 amplifier board and vertical heatsink. Upon opening up the cabinet, all 4 output transistors (2SD188A & 2SB545A) plus a few other surprises were inside a ziploc bag. I do not have a schematic showing the F-2701...
  3. Beavs

    Yamaha CR-2040 Shorted During DC/Bias/Voltage Adjustment

    Well, I'm pretty new to this and probably have no business digging into the likes of a CR-2040, but this is what I've found to pass the time and I'm enjoying every second of it. I picked this CR-2040 up for $200 knowing it was cosmetically great aside from being dirty and there was no sound out...
    • Beavs
    • Thread
    • capacitor electrolytic output transistor recap restoration transistor troubleshooting yamaha cr-2040 zener diode
    • Replies: 143
    • Forum: Yamaha
  4. R

    Sansui 771 restoration gone wrong, help please

    Hello dear members, my name is Romulus and I am new to this forum... at least i've been reading a lot from the Sansui section and this is my first post. Recently got a Sansui 771 in very poor shape but it was working. I've done some major restoration to cosmetics and repaired a couple of lights...
    • Romique
    • Thread
    • 771 fail mistake power receiver restoration sansui stereo transistor
    • Replies: 17
    • Forum: Exclusively Sansui
  5. Z

    Luxman L510 power transistors

    Hi all, I'm trying to repair a Luxman L510, I've found that two of the four power transistors for one channel are damaged (short between B and C), it uses the 2SA1075 and 2SC2525 complementary pair, can someone suggest a recommended complementary pair, even in a different package? I can find...
    • zluca71
    • Thread
    • luxman power amplifier repair transistor
    • Replies: 10
    • Forum: Solid State
  6. KinoRodori

    Sony 570ES left channel hissing

    Hi all it's my first post here and it's about my first purchased Hi-Fi amp on this audio journey. It's a Sony TA-F222ESA (aka 570ES in the west) and I admire it being a little beast with 100W @ 6 ohms with a very clear and neutral output. However the topic at hand is I'm experiencing a hissing...
    • KinoRodori
    • Thread
    • hiss hissing problem repair sony sony es transistor vintage
    • Replies: 58
    • Forum: Solid State
  7. Alonia

    Yamaha C2a 2SC1913/2SA913 replacement

    While searching for a replacement type for the transistors TR527/528 -> 2SC1913 and TR529/TR530 -> 2SA913 I found the following transistors as comparison type: 2SC1913 --> 2SC5171 (obsolet) --> 2SC4883 or 2SC4883A (digi-key) 2SA913 --> 2SA1930 (obsolet) --> 2SA1859 or 2SA1859A (digi-key) I...
    • Alonia
    • Thread
    • preamp repair replacement transistor yamaha c2a
    • Replies: 7
    • Forum: Yamaha
  8. Sergimm

    Strange output transistor setup on JVC 4VN-880

    I am attempting to clean an extra-dirty JVC 4VN-880 (was used in a bar for 30 years). When I looked at how would I remove the output transistors, I found something I’m not familiar with: On the opposite heatsink side that the transistor is, there is a strange connector composed by two...
    • Sergimm
    • Thread
    • 4vn-880 grease jvc output transistor
    • Replies: 7
    • Forum: Solid State
  9. Sergimm

    Choosing an ouput pair

    I'm restoring a Luxman L1 (thread), and I want to replace the current output transistors, which are not original. I am far from understanding all that's implied on pairing these kind of transistors, so I've made a list of potential replacements: 2SA1135/2SC2665 (Original as specified on the SM)...
  10. S

    Solder sucker sucked up half of a solder pad

    So, I have a vintage receiver that would occasionally go into protection mode, and I narrowed the issue down to the two voltage regulator transistors in the power supply. They both had cracked solder joints. Strangely, all of their solder pads seemed wiggly and loose, but I got them to stick...
    • Saffire
    • Thread
    • diy jumpers pcb solder transistor
    • Replies: 16
    • Forum: DIY
  11. O

    Luxman KX-101 input stage oscillation/static noise

    Hello, I have some difficulties repairing a Luxman KX-101 cassette deck. I fixed a number of things including the suckface mechanism, now I am puzzled by one persistent issue that I strongly suspect is coming from the input stage of playback amplification. The symptoms are a static noise or...
    • octavstan
    • Thread
    • cassette deck input stage luxman luxman kx-101 transistor
    • Replies: 6
    • Forum: Solid State
  12. Jamie Dh

    mcs 3253,power transistors ???

    help me!I have a question, do anyone knows if the mcs 3253 uses the same type of power transistors as the pionner sx 950 or the mcs is stk? please I'd really appreciate it.
  13. JayPare

    Transistor replacement (2SC828 and 2SC1685)

    Hi all, I'm looking for replacement for those to transistor for my project: 2SC828 2SC1685 I found the following replacement for 2SC828: KSC1815 (Digikey has KSC1815YTA, never sure what the letters at the end means) BC548BU (Digikey has it) And the following replacement for 2SC1685...
    • JayPare
    • Thread
    • amp repair japanese electronics transistor transistor equivalent
    • Replies: 2
    • Forum: Solid State
  14. JayPare

    Technics SA-160 repair advise

    Hi all, I in the process of bringing back to life a Technics SA-160 I found at the thrift store for 5$. I'm repairing it for my personnal knowledge, so I'm thinking of selling it and give the profit as a donation to the website. Right now it's not powering on. I opened it and noticed the...
    • JayPare
    • Thread
    • amp repair ampifier audio repair repair transistor
    • Replies: 24
    • Forum: Solid State
  15. mauser

    Help troubleshooting a Sherwood S-9910

    Hello all, I am new at troubleshooting electronics, and am hoping for some help and direction from those more knowledgeable than myself. I was given this vintage Sherwood with a sound output problem, this is what I know so far: Visual inspection shows nothing significant of concern, some dust...
    • mauser
    • Thread
    • 9910 monster output sherwood transistor vintage
    • Replies: 2
    • Forum: Solid State
  16. H

    Yamaha CR-1020.. replacement resistors and transistors help needed.

    Yamaha CR-1020 - On the amp boards can anyone recommend the replacement resistors for: R627 and R628? - Which of these diodes is the better replacement for HZ-6C? https://www.mouser.co.uk/ProductDetail/512-1N5232B or.. https://www.mouser.co.uk/ProductDetail/771-NZX6V2B,133 Best replacement...
  17. D

    2SC1885 NPN transistor replacement (TO92)

    Hi all, i found in many threads here that the 2SC2911 substitutes very well the obsolete 2SC1885. But it's a TO126 instead of a TO92. Anyone knows a TO92 that would do the job ? Thanks to all,
  18. Sergimm

    Sparks and a volatilized transistor

    I'm an idiot. I was trying to adjust the idle current for my Marantz 1050 after a full recap. But I slipped and I managed to short a collector leg of the 2SB686 transistor with the metal bar that holds the 4 transistors to the heat-sink. It cracked, sparked, it even dented the metal bar, and the...
  19. M

    Marantz Output Transistors

    I am trying to replace bad output transistors (2SD313D & 2SB507D) on a Marantz 2215b. I read previous threads that recommend MJE15030 (NPN) & MJE15031 (PNP). Since these are no longer available, I was hoping the MJE15030G & MJE15031G transistors would be suitable replacements...
  20. R

    Repair Denon PMA-280

    I am trying to repair my Denon PMA-280. The fuse blew, and it keeps blowing after replacement. I measured the transistors attached to the heatsink (C3853 and A1489), and one of them shorted on all combinations of the legs. This is the C3853 at place TR319 (schematic), for speaker channel B. I...
    • Rinkert
    • Thread
    • amplifer denon repair transistor
    • Replies: 4
    • Forum: DIY
  21. mrhandlin

    Purchasing transistors and power caps on ebay, should I?

    I'm sure that I will get some rather opinionated responses to this post. What are the chances that large filter caps listed on Ebay are any good? Will they be the actual brand that are advertised? If a component tester specs them out okay, would they still be worthwhile to use? There are...
    • mrhandlin
    • Thread
    • capacitor ebay power conditioning filtering purchase transistor
    • Replies: 25
    • Forum: DIY
  22. mlannoo

    2230 left channel crackling

    Was reluctant to post anything but i'm at a loss. I've done a bunch of reading here already and understand what may be the culprit but I could use a little guidance. I have crackling coming from the left channel of this 2230. It is not the speaker because I've swapped speaker connections. I...
    • mlannoo
    • Thread
    • 2230 channel crackling marantz transistor
    • Replies: 22
    • Forum: Marantz Audio
  23. Psychprog76

    Static Noise Left Speaker with Pioneer SX 838

    I have a Pioneer SX-838. Since few weeks a noise appeared on the left speaker. The noise is still here when I change the speaker, or when I turn the volume knob or even the balance. Whatever the channel (Phono, FM or AUX) It's the same noise with the same volume. It's like a blown crackle. I...
  24. Richs_Trains

    Marantz 1150 finally fixed

    Hey all, Got some help on my 1150 but I posted in barter town and that was the wrong place. I am going to order the suggested transistors for the differential pairs, but figured I may as well replace the other transistors on the power amps while I am at it (the static problem sure sounds like...
  25. 7367ruffles

    Does the 2sc2878 have a replacement?

    I want to replace the 2sc2878 transistors in my Yamaha AX-390 amplifier’s tone controls, as there is an audible hiss through the speakers and headphone jack, which increases/decreases in intensity as I boost/cut the treble using the knob. So far I’ve uses the Toshiba 2sc2878 datasheet and...
    • 7367ruffles
    • Thread
    • bipolar npn replacement substitute transistor
    • Replies: 20
    • Forum: Solid State
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