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repair amplifier

  1. R

    M-90a power protect problem

    I have an M-90a imported from Japan that looks like it's spent time in a river with how corroded it is, I got it for cheap so it is what it is, but I'd like to see if I can't fix it. The unit powers on but immediately enters protection mode. I have a step down transformer I'm using to power it...
    • Rotary
    • Thread
    • pioneer pioneer 100v repair repair advice repair advice help needed repair amplifier repair help restoration restoration help urushi
    • Replies: 2
    • Forum: Pioneer Audio
  2. plbeard

    60s Hifi Tube Amp Repair in Northeast?

    I am looking for tube amp repair in the Northeast (although the location may be moot, as it made need to be shipped regardless). These are mid-60s amps by Dynaco (a stereo pre-amp) and Harman Kardon (A500) that work but need modest repair or rehab. No MacIntosh-type stuff, but good. I am near...
    • plbeard
    • Thread
    • dynacco harman kardon repair amplifier tube amp amplifier
    • Replies: 11
    • Forum: Tube Audio
  3. T

    Curtis Mathes HA-235

    Hi! I'm a librarian in Dallas, I am looking for a service manual for this amp. I can't seem to find it in the Sam's Photofacts Index and I have a patron who has had this piece for a while and wants to repair it. Any help is appreciated!
  4. D

    Esart e100 restoration - strange resistor ?

    Hello all, I am restoring this old Esart E 100 amplifier right now. I came across a strange resistor in the volume potentiometer section. Here is the schematic : So one parallel resistor for each Balance potentiometer (R50 and R'50) and no resistor for Volume potentiometers. However...
    • degleve
    • Thread
    • esart electronics repair amplifier
    • Replies: 2
    • Forum: Solid State
  5. P

    Needed help with repair PA amplifier

    Hi, I recently managed to buy a Hollywood Impact 1000 amplifier at a bargain price. The seller informed me that one of the channels was damaged and was generating noise. However, after connecting the speakers and the signal, it turned out that the noise was present on both channels. To solve...
    • Patryk754
    • Thread
    • need help pa amplifier repair amplifier
    • Replies: 6
    • Forum: DIY
  6. N

    LXI Series 9300, Repair or Replace?

    Hello! I'm new here, nice to meet you all. I'm on a bit of a quest, and for the first time ever, ebay has failed me. TL;DR: Does anyone know where I can purchase an LXI Series 9300 Amp, or of someone who can repair mine? The long story: I have an LXI Series 9300 stereo system, with all the...
  7. JamesWest...

    Channel output Issue Marantz 1150

    Hello dwellers of the Marantz subforum. :) I am seeking knowledge about a Marantz 1150 (not the D model). This amp is a friends, and they asked me to take a look at it. I have a rudimentary knowledge of electronics (mainly tinkering with them for fun) and can solder confidently. A bit of...
    • JamesWest...
    • Thread
    • 1150 amplifier repair marantz marantz 1150 output board repair advice repair advice help needed repair amplifier repair help
    • Replies: 9
    • Forum: Marantz Audio
  8. L

    McIntosh MX151 color of outer case

    I got a Mcintosh MX151 that the case has really taking a beating scratch everyway, and yes the faceplate is in pieces, I don't what to spend the money on a new one so would like the color of the case. Any ideals ??? In the future I might want to sell it, so I would like the right McIntosh color.
    • lostman0077
    • Thread
    • mcinstosh painting cases repair amplifier restoration restore
    • Replies: 6
    • Forum: McIntosh Audio
  9. R

    Sony TA-D705 Receiver not loud enough (Preamp gone?)

    So I have this Receiver from the 90s its called Sony TA-D705 the problem is that the receiver when connected to my Speakers is not loud enough. I have to turn up the volume dial to the max, to barely hear something. When I put a CD in my Player and press CD Direct on my Amplifier it plays loud...
  10. Akur98

    Kenwood KA-3080R going into protect mode?

    Hello! I just got Kenwood KA-3080R amp, it was working fine, except the input buttons didn't work properly i.e. when CD pressed, the TAPE enables, if i press PHONO, then CD turns on, and so on. It's always random. The buttons are microswitches on the PCB. After some time it turned off. Tried to...
  11. F

    Zenith console help!

    Hi everyone! First time poster. I’ve got a bit of a project on my hands. I picked up a Zenith RN2601 console from Facebook marketplace and of course, it has problems. The left channel is out, the audio is extremely quiet(about the volume of an iPhone), and it has virtually no bass. FM, AM, and...
    • Forsythe93
    • Thread
    • diy repair amplifier restore zenith zenith console
    • Replies: 15
    • Forum: Solid State
  12. Alonia

    NAD Model 300 repair

    After a long time where I was no longer active here I would like to throw an interesting project into the room and maybe someone can help me. Normally I mainly deal with Yamaha devices but for once a NAD Model 300 has found its way onto my desk.;):biggrin: There was a note on the lid...
    • Alonia
    • Thread
    • nad nad model 60 repair repair amplifier
    • Replies: 5
    • Forum: Solid State
  13. J

    Denon DRA 625r bass issues

    Hey everyone, Current set up: FS52 floor standing speakers; SVS SB-12 NSD; Denon DRA 625. Primary use is music via a Technics SL-Q2 TT and phone through the aux input on the AVR. Listening around 3 meters away in a small living room. Just recently noticed my sub sounded very...
  14. troutmaskrep

    Sansui AI-317 mk1 - Troubleshooting and Repair

    I purchased a Sansui AU-317 off of ebay a few months ago in non-working condition to force myself to learn how to fix it. I have no background in electronics or electricity, although I did just recently complete the building of a Dynaco ST-70 and learned basic safety as part of that process...
  15. P

    Need help with a CA-800

    I've been tasked to diagnose a CA-800 amplifier for a family member, everything works totally fine, but the power meters spike to 5/5 and the VU stays at maximum. I have the whole thing apart currently, not seeing any burnt resistors in the path to the power meters (or anywhere else really). Any...
    • PolkaBird
    • Thread
    • fisher fisher ca-800 power meter power meters repair amplifier vu meter
    • Replies: 3
    • Forum: Fisher
  16. D

    Diagnostic - Pathos Logos amp

    Hi everyone! I am writing to better understand an issue that my amp displayed today. Specifically, the amp gives a periodic popping sound on the right speaker, even at 0 volume. The amp is question is a Pathos Logos that I recently bought used (worked fine until today!). Something to note is...
    • DimiSakis
    • Thread
    • diagnostic logos pathos repair amplifier
    • Replies: 2
    • Forum: DIY
  17. A

    Luxman L-80V Problems! Help!

    Hello, A few months ago I retrieved my Luxman l-80v from storage. After connecting it up it started humming aggressively so I turned it off and let it rest for a bit. On the second attempt, the humming grew and the old 50v 10000uf Capacitors exploded. All 3 of the 0.3A 250v 6x30mm fuses were...
    • AmpSound
    • Thread
    • 10000uf diagnose help luxman luxman l-80v repair repair amplifier replacement
    • Replies: 14
    • Forum: Solid State
  18. donny0m

    Help fixing a Wharfedale amplifier

    Bought this amp and speaker set at a garage sale, owner said speaker dont work. I've tried out the speakers and they are great. Turns out the active subwoofer does not output signal to the speakers. The sub woofer speaker itself is going though. I opened up the back plate to see if there was a...
    • donny0m
    • Thread
    • repair amplifier wharefdale
    • Replies: 4
    • Forum: DIY
  19. Carguy1394

    Repair Pioneer A9 NSA

    Repair Pioneer A9 NSA.Any help or opinion is welcome
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