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sa-8100

  1. C

    SA-8100 low volume left channel and parts list Update

    Hi, last year I started restoring the old SA-8100 which belonged to my mother. I changed all the e-caps (including the ltwo large ones 10 mF 50V, half of the diodes, half of the transistors and the relay. The unit works quite well and the improvement has been noticeable, but there are still some...
    • centrons95@h
    • Thread
    • led conversion left channel gone parts list restoration sa-8100
    • Replies: 9
    • Forum: Pioneer Audio
  2. tusntuk2

    SX-727 Schematic changes for AWM-027 D Protection Board

    Holiday Greetings, AK'ers! My beloved Pioneer SX-727 blew an internal .5 fuse, so I checked it out. AK threads suggested the power supply or the protection circuit were common culprits. You might remember that the Protection Boards in the SX-727, and several other SX and SA series amps, are a...
    • tusntuk2
    • Thread
    • awm-027 awm-027d pioneer protection circuit sa-8100 sx-727
    • Replies: 0
    • Forum: Pioneer Audio
  3. C

    headshell recommendation with a PL-A450 + Ortofon Red

    Hi all, Novice listener here. I've been lurking and searching for advice to get a lovely vintage system off the ground. Just before COVID I found (in 3 separate transactions) a PL-A45D + SA-8100 + a pair of HPM 60's thanks to the great advice from a friend. I have a new Ortofon red that needs...
  4. amr2

    Pioneer SA-8100 restoration

    Hello I'm servicing this unit. All components seems to be OEM. I found that the control board ( AWG-017) have some cut traces and some components under the board. They appear to be OEM These are the installed capacitors C1 1/25 C2 1/25 C11 22/10 C12 22/10 C15 100/6.3 C16 100/6.3 C17 4.7/25...
    • amr2
    • Thread
    • pioneer restoration sa-8100
    • Replies: 18
    • Forum: Pioneer Audio
  5. K

    SA-8100 Output transistor insulators

    I'm in the final stages of restoring my SA-8100 amp, having replaced the caps, transistors, and a few fried resistors. It is obvious that something really bad happened to the power amp board, so I'm replacing the output transistors as well, assuming they suffered stress along the way. When...
    • kpmadden
    • Thread
    • output devices power amp board recap and restoration sa-8100 sa8100
    • Replies: 3
    • Forum: Pioneer Audio
  6. K

    SA-8100 "as built" photos

    Hello, and happy new year to my fellow AK members! I have finally started the rebuild of a nice SA-8100 I purchased on eBay years ago. It's condition is generally good, but something really bad happened to one channel of the power amplifier during its previous ownership. It was repaired, but...
  7. Wyatt Weeks

    SA-8100 : low volume right channel problem (RESOLVED)

    EDIT: the initial problem with idle current has been resolved (thanks to MTF!) - see post #14 for a description of the The ‘low volume right channel’ issue I’m now having... EDIT: The low volume in right channel problem is also now resolved. Hi - I recently acquired and rebuilt a SA-8100...
  8. Dritan

    Repairing old Pioneer SA-8100

    Hi. A week ago I got an old Pioneer SA-8100 amplifier. Tested it and it worked for few moments and the protection circuit did its job, several time thus I decided to go further and repair it. I recapped the power supply and the power amp. I have changed the transistors: AWR-030: q1 - TIP122 q3...
  9. KeithD

    SA-8100 -36V on one amp channel output

    My SA-8100 that I recapped and replaced all suspect transistors has developed an issue. Output of power amp board (AWH-022-A) on one channel is reading -36V. Input on that channel (pin 16) is 0V. On this board I actually replaced ALL transistors in addition to the e-caps. I checked voltages...
  10. slayer44

    SA-8100

    Hi all...so I am having some trouble finding a replacement volume pot for a SA-8100. I guess there wasnt much call for a double tapped pot in pioneers' other models. I see a ton of single tap pots out there, and was wondering if anyone has come up with a fix to get theirs working. I would like...
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