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power supply

  1. C

    Sansui Solid State Amplifiers and Low Freq. Oscillation

    Hey all, I have a weird issue that's come up twice now, both Sansui solid state receivers, both the same kind of issue, low frequency oscillation. First - I have a Solid State 3500. The outputs are original - as are all pre-drivers/tx on both amp boards. Bias adjusts fine on both channels...
    • CaseyWKC
    • Thread
    • bias low frequency oscillation power supply sansui solid state stability stv swing voltage
    • Replies: 10
    • Forum: Exclusively Sansui
  2. SickOfItAll

    Yamaha M80 - In over my head….

    Hello. I have a Yamaha M-80 that has been with me for ever and can’t imagine life without it . It was serviced (including polychloroprene adhesive removal) by a place called Paradyme in California just before I purchased it. The M80 has provided years of flawless service showing no signs of...
    • SickOfItAll
    • Thread
    • m80 power supply protect yamaha amplifier
    • Replies: 3
    • Forum: Yamaha
  3. nevergiveup

    Cheap GC2020 resurrection attempt

    Hello first time poster. I have a habit of picking up these hopeless cases and this GC2020 is my latest. Inside it looks nearly brand new, the guy I got it from had no idea what the problem is. I thought maybe the power supply could be faulty but I can't see any strange caps or burns other than...
    • nevergiveup
    • Thread
    • compressor power supply repair advice
    • Replies: 7
    • Forum: Yamaha
  4. Mrcoolest123

    Sony CDP-XA30ES CD player power supply

    Good evening forum people! I bought a sony cdp-xa30es cd player but unfortunately my unit came without a Power supply. Where the supply should have been inside the case there's just an empty space, so I'm looking to substitute it or make a DIY replacement. Unfortunately there's zero info online...
    • Mrcoolest123
    • Thread
    • cd cdp sony marantz help power supply power supply assembly reapair
    • Replies: 0
    • Forum: Digital Sources
  5. A

    Need Help Identifying a Replacement Cap for L-05M Power Supply

    Hi, Hope your listening is going well. I am in the process of acquiring a pair of L-05Ms. Been "in storage" for years according to the seller. Most likely be in need of a rebuild. I've looked through the AK database for information on the main filter caps (12,000uF @ 79V). Did not see...
  6. A

    Is this part a fusible-link

    Hi, I am working on a SG-9800 Equalizer and have a question on a couple parts. This unit does not have a fuse in the circuitry. The unit does have two resistors in line with the rectified power before the regulation circuity. The initial issue was a burnt resistor (R902). This led to...
    • ampman
    • Thread
    • fusible resistor pioneer power supply sg-9800
    • Replies: 6
    • Forum: Pioneer Audio
  7. X

    Pioneer SX-1280 voltages at power supply and no FM

    Unit is working under AM, tape, phono, aux, but I am not getting any meter movement or signal under FM. I measured at Power supply pin 16 Orange wire and I am not getting the 13 V, checked back to the power supply and receiving 0 V. This unit has been recapped, and we also replaced the diodes /...
  8. kennycrippen

    NAD 214 Troubleshooting

    I’ve been restoring a NAD 214 power amp with my 9 yo son for a fun learning project. He’s been doing great with soldering and staying interested. Initial symptoms were: unit powers on, soft clipping light stays on, no relay click. Front lights stayed on even after unplugging the unit suggesting...
    • kennycrippen
    • Thread
    • nad nad 214 power amp power supply power supply board relay restoration restoration help
    • Replies: 31
    • Forum: Solid State
  9. P

    MPI-4 High Voltage Power Supply

    I'm looking to change the high voltage power supply of my mpi-4 as the scope is no longer outputting a display and believe the C301 capacitor has gone faulty which is a .1uf 1000v Sprague black beauty cap it makes a noticable buzzing sound when the unit is turned on. My question is which...
    • PLUTD
    • Thread
    • capacitor high voltage power supply mcintosh mpi-4 oscilloscope power supply
    • Replies: 1
    • Forum: McIntosh Audio
  10. C

    Can't find replacement nichicon electrolytic capacitors 10000uF for 1980s Sansui receiver

    Hello, I am trying to revive my 1983 Sansui Z-7000 receiver. It has 2 - nichicon 10,000uF power supply caps at 71v, 85degC. 80mm high x 40mm wide. They have 5 pins (separated by 60deg each), only 2 are active (across from each other), spaced at 25mm across from each other. They have vents on the...
  11. D

    Marantz 2220B intermittent voltages in power supply

    A power supply is behaving a bit erratic in my Marantz 2220B. I think I can recall putting this unit aside a couple of years ago after it developed a sizzling "bacon" kind of sound in both speakers which would indicate a problem in the power supply, perhaps some transistor. However, after trying...
    • Donguri
    • Thread
    • intermittent voltage marantz 2220b power supply
    • Replies: 7
    • Forum: Marantz Audio
  12. sbparks

    SX-1280 Power Supply Assembly (AWR-157) Question...

    Hi Folks, I know this topic has been discussed a bit, but I can't seem to find the specific threads. I want to rebuild my power supply board for this unit. I see evidence of scorching of the board due to the quite warm (hot) transistor and several of the capacitors have seen better days. I...
  13. Joe Kraft

    Help with Accuphase E-202 Power Supply voltage

    I need to tap in to some Kenwood/Kensonic/Accuphase gurus. I am restoring a very nice Accuphase E202 integrated amplifier and I am having difficulty getting the proper voltage out of my power supply board. (719-0004-00). I have recapped and replaced all heat stressed resistors. I have replaced...
  14. M

    Stereo Console Power Supply Issues

    Hi Everyone! I recently got a Magnavox stereo console to upgrade off of Facebook Marketplace. I checked it out in person, and the console turns on and can very poorly play AM/FM radio, which seemed like good signs of an excellent base to work off of. I took it to an audio shop to get checked...
    • MaximumHiFi
    • Thread
    • diy help magnavox power supply stereo console vinyl vinyl stereo
    • Replies: 9
    • Forum: DIY
  15. T

    Avante Audio Imperio Pro IMP205

    Hello. I'm looking for someone who has an Avante Audio Imperio Pro IMP205 speaker and can take a photo of the power supply motherboard for me. I am particularly interested in the place marked in the photo. Thank you in advance for your help.
    • ThorinB
    • Thread
    • avante audio imperio imperio pro imp205 pcb power supply service manual
    • Replies: 0
    • Forum: Speakers
  16. T

    Avante Imperio service manual

    Hello. I am looking for a service manual or a photo of the power supply PCB for the AVANTE IMPERIO loudspeaker. The power supply has failed and I am unable to read the resistance of the two resistors marked in the photo. the resistors are hidden under a layer of silicone used by the...
    • ThorinB
    • Thread
    • avante imperio manual pcb power supply service
    • Replies: 1
    • Forum: Speakers
  17. 'goodtimes'

    Marantz 2385 no output on left channel of both Phono 1 and Phono 2

    Hello out there in Marantz land! I have been working on this beast of a receiver and it has been going pretty well thus far. The original problem was the main filter caps, one deteriorated internally but luckily it didn't take anything out with it. I did my own version of the restuffing them...
  18. Racingh11

    Soundcraftsmen MTX S800 battery charger

    I needed a battery charger for a 144V hybrid tractor project I'm working on. I also have a MTX Soundcraftsmen S800 amp for parts. It is the same style as the old Soundcraftsmen PCR800, PM840/860 with regulated power supply. I needed the amp section to repair an S860, so I had everything else...
    • Racingh11
    • Thread
    • amp charger hybrid mtx pcr800 pm840 pm860 power supply soundcraftsmen
    • Replies: 1
    • Forum: Solid State
  19. W

    AIYIMA A07 Pro power supply

    Not sure if this is the right forum for this question. This amplifier comes with three options for power supply. 32V5A 36V6A 48V5A What difference does the power supply make?
  20. dylan_k

    Replacement Power Adapter for a TC-750LC Pre-Amp

    I've read that there can be improvements by upgrading the power supply for a phono pre-amp like my TCC TC-750LC. What I'm having trouble finding, though, is the make and model number of any power supplies that can provide this improvement, or any specifications. The power supply that came with...
    • dylan_k
    • Thread
    • power supply pre-amp tc-750lc
    • Replies: 15
    • Forum: DIY
  21. B

    NAD C588

    Hello everyone, I’m new in here and have a couple of semi-pressing issues that I would love it if some of the experts around here would be willing to help me with some info or advice on what my best course of action might be! Thanks in advance for your help… First up I have a NAD-C588 Turntable...
    • Bhilton1
    • Thread
    • nad nad c588 power supply preamp
    • Replies: 10
    • Forum: Turntables
  22. A

    Trio KT-900 - trying to fix problem tuning stereo

    Hi all I'm fishing for a bit of help trying to fix an issue with this tuner. Hopefully someone out there has the time/inclination. It's a nice sounding tuner and I'd like to get it working, if I can. The issue is a bit unusual. It will tune into stereo (with some effort) and sounds good...
    • audiogymp
    • Thread
    • analogue cleaning power supply stereo trio kt-900 tuning problem
    • Replies: 7
    • Forum: Tuners
  23. M

    Power supply characterization

    I am interested in better understanding DC power supplies used in receivers/amplifiers. What are some approaches to characterizing DC supplies used for audio equipment, including relevant metrics? I understand the blunter characterizations commonly performed for generic/bench top power supplies...
    • Matt Giarra
    • Thread
    • dc power supply power supply
    • Replies: 8
    • Forum: DIY
  24. D

    2245 p800 problems

    Aloha AK, I was 96% done with a full recap of my 2245 with no problems. Phono board, preamp, and both power boards all done with no shorts on DBT, audio in both channels. I adjusted the idle current and DC offset on both boards just fine. I got to the main power p800 board, recapped it, good on...
  25. G

    Advice for Lehman power supply upgrade… or not

    So I have an original Lehmann Black Cube (from early 2,000’s) with standard wall wart peer supply. I have 2 Rega TT’s, an older 3 with Goldring 1042 MM & new P6 with an Ania MC. The P3 w1042 plays quiet but I’m getting a 60 hz hum through the P6 Ania (yes I am adjusting the dips for MC). I...
    • greggor
    • Thread
    • lehmann phono stage power supply reccomendations rega
    • Replies: 9
    • Forum: Turntables
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