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power

  1. Stack

    Kenwood KA-801: powers on intermittently

    I've been having a very strange issue with my Kenwood KA-801 recently and was wondering if somebody could point me in the right direction for starting my troubleshooting: Recently, the amp has been having intermittent issues powering on, and it's been getting worse. 1 time in 10 the amp will...
    • Stack
    • Thread
    • intermittent ka-801 kenwood power
    • Replies: 10
    • Forum: Solid State
  2. C

    Marantz 4300 - Missing 10v in Power Supply

    Hey all, Finally got this Marantz 4300 on my bench that I'd been putting off for quite sometime. Power cable cut, busted switch, blown left channel. Anyhoo, I rebuilt/refreshed the right channel but before firing it up decided to check out the power supply. It was swinging between...
    • CaseyWKC
    • Thread
    • marantz 4300 marantz power supply missing power psu unstable
    • Replies: 51
    • Forum: Marantz Audio
  3. sean sweeney

    Marantz 2220b came back after a recap with pesky power supply issues!

    I just recapped and calibrated this 2220b... found all the corrections, got the thing done, and when I fired it up, the 220 ohm wire wound resistor got hot and it blew the fuse. Still had the relay closing. Still had lights... so I went and did the calibration again and this time it all worked...
  4. getthedog!

    Pioneer VSX-3300 - relay clicks but no display or output

    I've got a VSX-3300 which turns on (volume knob lights, relay clicks) but that's it. Fuses are all OK I'm seeing 5v and 2v in places Power button functions OK 12v rail appears dead - checked at the test points and other plug pins Relay on the small transformer board clicks and stays engaged...
    • getthedog!
    • Thread
    • amplifier problem diagnosis help issues pioneer power vsx vsx-3300
    • Replies: 5
    • Forum: Pioneer Audio
  5. N

    Yamaha rx-a 1050 convert to power amp

    hi all first post here so please dont judge :) So im trying to convert a motherboard failed yamaha avr to a power amp just by using its transformer, amp boards and speaker terminal board ?( dont know the name of this board) all advise comes in handy . First question can i connect line in signal...
    • nikke92
    • Thread
    • amplifier avr diy power power amp power amplifier yamaha
    • Replies: 44
    • Forum: DIY
  6. electrotek

    Onkyo A-9130 Volume Increase Causes Protection

    Hi legends! I recently acquired a 5 year old Onkyo A-9130 amp from a first-time owner who found it would cut out (assumably protection circuit) after the volume reached above about 10 o'clock (1/3rd power) if, and only if, music ("input") is playing. However, using headphones does not cause the...
    • electrotek
    • Thread
    • a-9130 amp amplifier onkyo power protection circuit
    • Replies: 0
    • Forum: Solid State
  7. P

    Arcam Alpha 3 Tuner - Won’t power on

    Hello. I recently purchased an Arcam Alpha 3 tuner. It was not powering on arrival so got a refund, but can’t bring myself to get rid of it! When plugged in the power button does nothing, no lights or anything. I’ve checked the plug fuse and internal fuse, both fine. I checked the power...
  8. Drayman

    C31V Won't Power Up

    Hi, newbie here- Thanks in advance for your help. I have an early C31V with the volume buttons (Serial ER1041). It's been poorly stored in a box in a shed, but otherwise undisturbed for years. PROBLEM: Plug it in, press red Power button, it wont turn on. Totally dead. No clicking, no lights...
  9. Y

    Marantz 6350 Power Button

    I picked up a beautiful 6350 at auction. I opened the back and was amazed at the simplicity (especially compared to the Sony PS-x5 I've been struggling with lately - anyone need parts???). I cleaned what little grease there was and relubed all hinge points. It runs perfectly except for one...
    • yustr
    • Thread
    • 6350 marantz power
    • Replies: 2
    • Forum: Turntables
  10. richardg0n

    Why Does 2325 Amp Have Full Voltage Readings W/O PWR Supply?

    I am troubleshooting a possible short on one of the 2325 amps connected to a DBT and only having one amp in the receiver. I have the RCA connected to the amp only. Can someone explain why I can take full voltage readings with my multimeter on the components without the amp power ribbon...
  11. elkasdad

    Model 24 won’t power OFF

    My Model Twenty Four will not power off. Into the back of the preamp’s switched power outlets I have a Model 250 amp plugged into the outlet with the “protector” and an AR “the turntable” plugged into a second of the three “switched” outlets. The amp and the turntable are receiving power and...
  12. M

    ADC Sound Shaper Two Voltage Output Or Service Manual

    Hello everyone. I am looking for the power output readings of the Sound Shaper Two. Not the MKII. I can find no information or crossreference on this transformer.This is a P-100686 with a 3 wire output. 1 black, 1 brown and 1 grey. I also can't locate a service manual This would solve all of my...
  13. Virus

    An electric clicky sound, Nakamichi CD player won't turn on

    I've just done a classic repair of replacing the belts on my Nakamichi MB-3 and everything works but a new problem arose. When I power it on, the relay sends electric surges in an attempt to start the CD player to no avail (you can see the electricity between the board and film that's zip-tied...
    • Virus
    • Thread
    • cd player fix help issue nakamiachi power repair
    • Replies: 0
    • Forum: Digital Sources
  14. D

    Music Hall MMF 5 won't turn on? Right power cable

    So I found a Music Hall MMF 5 table at the thrift for a decent price. It had no power cable. I got one off of Amazon that I thought would work, but it doesn't. I'm thinking that that's because the cable I got uses DC power. I found out that I need AC power, but some of the OEM cables cost $40+...
  15. foo.kamikaze

    Pioneer SX-727: Protection Mystery Caused by Power Supply?

    Hi folks, I have an elusive and mysterious protection issue I believe originates from the power supply. HISTORY I bought a working Pioneer SX-727 up until I decided to begin rebuilding. I did my research on Audiokarma as I always do before jumping into a rebuild. The first day of the rebuild I...
  16. B

    Need to find VU meters for Marantz 500

    They say fs.. 200uA on the back.
  17. richardg0n

    McIntosh MX 112 FM/AM Stations Suddenly Gone

    Greetings AK, I was listening to FM stations on my MX112 and noticed FM reception began fading and a short while later I could no longer receive FM stations. I noticed the tuning tube is still on but no longer fluctuating while tuning in stations. A few years ago I recapped the power supply...
  18. DoctorJon

    Question about protecting my stereo with a surge protecter.

    Hi all, I have a question about how you protect your home from a stereo that is older from burning out when you are unexpecting it. I have a Pioneer SX-3700 reciever that I want to protect both from a surge and the chance that it would have heat sink problem that would result in electrical...
  19. david winter

    Heathkit AA-40 - strange voltages at 6AN8A plates

    Hi, I have been working on a Heathkit AA-40 amp for which I did the following works: - Set to 230V mode (powered at 240Vac). - Surgistor replaced with CL-90 varistor - Tubes: two NOS Sylvania 6AN8A + four good EL34 - All electrolytics and coupling caps replaced - Most resistors replaced (out of...
  20. C

    Fault finding or fix a dead CD player, Nak MB-3

    Hello, I have a Nakamichi MB-3 CD player that is completely dead. Looking for either tips on fixing it, or where to source a replacement power transformer if that turns out to be the problem. Here's what I know: It was dead when I got it. It was free with a working tape deck I bought. So I...
  21. KD2KGA

    Power & Fuses

    Quick story with advice and then a question at the end. I have a Pioneer SA-8800 that I had recapped by a tech years ago. Now I'm getting into doing things for myself and recently recapped a Technics SA-200 that I found. And look, I'm still alive. I had some power issues a few months back with...
  22. M

    SX-1250 died

    Hello, total Noob here. I inherited an SX-1250, decent condition, a few months ago. It worked ok. A few weeks ago, I took it apart and cleaned all the switches and contacts and it worked beautifully after that. Yesterday, the receiver was idle for several minutes after listening to some music...
  23. H

    Marantz PM7200 doesn't start after cleaning

    Hello everyone. I would like to get your ideas what went wrong with my amp. I bought it recently and it was very dirty - all pcb’s were covered with thick layer of dust. I cleaned dust with brush and pcb with spirit and contact cleaner, then cleaned with cotton buds. After that I switched on...
  24. C

    Yamaha NS-W1 Subwoofer - stopped powering on

    Was wondering why my bottom-end had gone away, my Yamaha NS-W1 from early 80's died. No light and no power. Took it to the bench, removed the bottom and side grills. I'm not electrically inclined at all. I have a multimeter and the service manual for it. Where do i start? No loose wires or...
    • cmarti02
    • Thread
    • power subwoofer yamaha
    • Replies: 9
    • Forum: Yamaha
  25. Preston8452

    Power, Network, Connection, Which one matters the most to you?

    Hi guys, When it comes to sound quality, I've realized there're freaking many factors could affect it, some say the DAC is the paramount thing to be taken care of; some say the speakers are the real crucial part, given that you hear all the sounds from them, there's no certain right or wrong...
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