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driver board

  1. tutor_turtle

    2330B Driver board dilemma.

    I have 2330B in for blown outputs. The customer was driving two 4Ω speakers and fried the driver board. I identified the many, many damaged parts.. Some transistors are unavailable so I used the recommended On-Semi replacements. I even managed source original output transistors. I could not get...
  2. D

    Sansui 9090DB Poppy Buzzy Bass

    Hello! I have been playing my rebuilt 9090DB for about a month now. Yesterday I finally was able to turn it up to see how she sounds on a higher volume. I did a full recap, replaced fusible resistors on the driver board, replaced some diodes, rebuilt the bridge rectifier, fixed the through...
    • degdug
    • Thread
    • 9090db bass driver board help pop pop noise on power up repair advice
    • Replies: 5
    • Forum: Exclusively Sansui
  3. kennycrippen

    Sansui F-2624 New Build From Affinity for Artifacts Question(s)

    Hello! I’ve just nearly finished building this board and it’s beautiful. Very grateful to Ben for providing the BOM along with the blank PCB on eBay. I unfortunately have made somewhat of a rookie mistake in attaching the bottom connectors as they are misaligned with my 7070 male pins and won’t...
  4. tutor_turtle

    SX-1010 epic driver board issues.

    After Recapping every board except the driver boards, everything checked out. WhenI got to the first driver board, I discovered it had warped due to excessive heat. When I started replacing parts, traces fractured left and right. I got to the point of having to pull the board completely out of...
    • tutor_turtle
    • Thread
    • awh-032 bias troubles driver board substitute resistive load for output transistors sx-1010 trouble shooting ouptut
    • Replies: 25
    • Forum: Pioneer Audio
  5. Racingh11

    Soundcraftsmen A5002 driver boards

    I have had a few amps with burned or damaged driver boards, so I decided to make some new ones. I also plan to make output boards to retrofit everything in the MA5002 wire-wrap rats-nest. The first version is basically a remake of the originals, with component and trace placement in the same...
    • Racingh11
    • Thread
    • a5002 driver board ma5002 pcb soundcraftsmen
    • Replies: 0
    • Forum: Solid State
  6. L

    G-9700 F-3074 Driver Board Repair

    I purchased a non-working g-9700. The seller said he sent 1 of the driver boards to a "professional" to have it repaired and when he got it back it still did not work. I do not have much experience repair these but I got it at a fair price to if I can not repair it then I can part it out. *Any...
  7. Racingh11

    Adcom GFA-565 service

    I finished restoring a pair of these amps. They both had DC offset issues among other things. After messing around with the original board on the first one, I found it had current leaking into the DC servo opamp ground reference. I removed everything from the trace and it was still there around...
    • Racingh11
    • Thread
    • adcom driver board gfa-565 gfa565 power amp
    • Replies: 11
    • Forum: Solid State
  8. BradWil

    ToliTom's F-2624 Driver PCB Build Sansui 8080DB

    Greetings. Here’s a thread detailing my first attempt at using this beautifully engineered F-2624 PCB produced by AK legends Tom and Toli. It does not cover any of the other F-2624 PBCs that have been seen on offer from various others. Here's Tom’s original AK post...
  9. G-901

    G-9000 R33 on Driver Board keeps burning up

    Was testing receiver with Dim bulb tester and keep burning up R33 on the F-2806 driver board. Any suggestions. I was going to start by testing TR 9 and TR 7
    • G-901
    • Thread
    • driver board f-2806 g-9000 g-901 resistor short circuit
    • Replies: 1
    • Forum: Exclusively Sansui
  10. W

    G-5000 G-6000 G-7000 F-2856 Driver Board

    I'm looking to make a clone of the F-2856 Driver Amp Circuit Board used in the G-5000, G-6000, and G-7000. The schematic and pictures of the PCB are readily available in the service manuals, but I do not own one of these boards and so cannot determine the physical dimensions of the PCB and...
  11. TheThreat

    Tracking a short in an AU-666

    I'm trying to track down a fault in an AU-666 I bought recently and I'm looking for some ideas. I think I've narrowed it down to one of the Driver Blocks but I can't seem to pin down the problem. I'm going to refer to it as the "bad" board until I can find another cause. With both driver boards...
  12. Pilotlips

    9090db smokes R34 without fuse 04

    Hello, Doing a restoration on the Sansui 9090db. I did a full recap, changed most transistors, resistors, diodes and fixed all threw holes on the dolby board. Naturally also all pots/switches taken care of. Now without the driver board using a dbt is dim the relay works and get the green...
  13. metaphile

    Sansui QRX-7001 F-2436 driver board: strange resistor values

    Update: I did not lift one leg of the resistors before measuring and therefore read the wrong values because the resistors were still in-circuit. Once I lifted one leg I read the right values. Measuring across the other resistors without lifting one leg gave me the right values so I incorrectly...
  14. zapdog

    MC2105 Driver Board Help

    Hi guys, this is my first post, so go easy on me. I have a 2105 with driver boards 049-899 which blew a channel a number of years back. At the time I replaced the large 'lytics, but then shelved the project due to lack of time. recently I have replaced all the output transistors (MJ's), all...
  15. FireGuruMN

    AU-X1 Troubles

    I fired up (literally) my AU-X1 yesterday because I was feeling nostalgic. One channel was silent. So I went around to the back and found that on of the RCA connectors was loose. When I plugged it in I heard a distressing "sizzle" from deep inside the amplifier. The power/protection light...
  16. Cabdiver

    Dynaco ST70 rebuild with Triode boards

    Hello everyone. I'm a newbie with more enthusiasm than good sense who bought the Triode E input (Driver) and capacitor (power) boards in an attempt to bring an ST70 back to life. I've completed the boards and placed them in position on the chassis, but have gotten stuck on the final stages of...
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