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power supply voltage

  1. sabrefencer

    C11 Preamp Restoration - Advice requested on tweaking voltages

    I recently acquired what appears to be an original C11. It has the silicon rectifier bridge (either the mod per service bulletin 105 or factory) but retained the original selenium rectifiers for the B+. Unit appears to have been produced in second half of 1962 (based on various component date...
  2. twelvety

    Harman Kardon PA2200 unstable DC offset and mysterious rails voltages

    I've scoured these forums for years and now I have a problem to ask you all about. I've learned so much already from @ConradH 's amazing Troubleshooting Audio Electronics Without Tears. It has reinforced the belief that I can figure this out if I understand the circuits well enough and test...
    • twelvety
    • Thread
    • dc offest harman kardon power supply voltage
    • Replies: 3
    • Forum: Solid State
  3. Yamaha5000

    Yamaha CA-810 Schematic Issues

    Serious issues between schematic, drawings and parts schedule. I have the hfe and Analog Alley service manuals and both show the same issues. I believe unless someone has a more updated service manual I must find someone who has a CA-810 that could document the Power Supply 800 series of parts...
    • Yamaha5000
    • Thread
    • power supply voltage schematic yamaha yamaha ca810 yamaha yamaha ca-810
    • Replies: 69
    • Forum: Yamaha
  4. scottie4

    Need help with non functional vintage GE P776g compact stereo

    I have a beloved GE P776g am/fm stereo with a ceramic turntable. Not high tech, but I love playing my 60-70's vinyl on it. My first stereo actually. It will no longer turn on. I do not have a repair shop I can go to. I do have a small amount of repair experience, so I opened it and discovered...
    • scottie4
    • Thread
    • 60's 70's compact stereo ge p776g power supply open power supply voltage repair help solid state amplifier vintage gear
    • Replies: 12
    • Forum: General Audio Discussion
  5. RiotClass

    Marantz PM325 Amp Repair Please Help

    Hello, I recently got my father in laws old Marantz turntable and amp so I could have a go at some vinyl . When I tested the amp the lights were on (see pic) but no sound coming from the speakers and no movement in the power leds no mater what I did with the volume knob. I know enough about...
    • RiotClass
    • Thread
    • maratz pm325 power supply power supply voltage repair
    • Replies: 0
    • Forum: Marantz Audio
  6. N

    SX-1250 Power Supply Assembly Voltages High

    Hello, first time to the forum. My Pioneer SX-1250 power supply assembly (AWR-107) is registering higher than normal voltages which I think might be affecting the stabilizer board. The 85v is reading 92.6v, the -87.5v is measuring -94.0v and the 23v is measuring 26.24v. Is this from the...
    • NetSonny
    • Thread
    • awr-107 pioneer sx-1250 power supply assembly power supply voltage
    • Replies: 16
    • Forum: Pioneer Audio
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