repair advice

Hey folks, I’m getting into receiver repair (only done recapping and basic adjustments on turntables before) and have a really barebones tinkering setup (I solder on the floor in an oven tray, don’t worry I have a standing fan). Exposition aside I got a nice looking Marantz MR235 for 50 bucks...

I have a rack consisting of a marantz 3250b and 300dc, and the left channel cuts out. It goes silent while the right continues to play music, until I turn off the speakers, max out the volume until the vu meter starts showing something, lower it again, and turn the speakers back on. Doing this...

Hello hopefully to a vintage stereo enthusiast!! This is a long shot, i know. I have this stereo unit from the 1960’s. The cord has been cut as I needed the plug for another use, but of course it was tested before then. I can’t find much info about it online. Is there anyone out there who...

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...

Anyone have any recommendations for a repair tech near western North Carolina? The shop in Northern Va that I’ve used in the past isn’t accepting shipped items. So I’m looking for someone that will accept shipped items or someone closer( 150 miles +-). Thanks for any help Lance, Bryson City NC

So I imported a PD-5000 from Japan and before anyone says anything, yes I understand the inherent risk of shipping these components and it was sold as untested anyways so I expected it would have issues. I have also read the CD player diagnosing thread and I'm still a bit stuck The package...

So I imported a PD-5000 from Japan and before anyone says anything, yes I understand the inherent risk of shipping these components and it was sold as untested anyways so I expected it would have issues. The package arrived fine and well protected, however the unit itself did not have any of the...

I picked this tape deck up thinking I might try to get it working. Having opened it up and taken a closer look, I'm leaning towards just trying to find a working or semi-working 201 and keeping this for parts. The primary fault seems to have been the power switch. Either the power cable got...

Greetings all, I am in the process of repairing and restoring an SAE 2500 Pre-Drive Board. In taking out the screws to the hear sink, one of the copper rings separated from the pcb (see !MG_1070). It is the bottom screw hole in the photograph and is the bottom hole of the q4 transistor. In...

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...

Any advice on how to fix this damage or am I just screwed? I've got photos from before it was shipped and it was mint. I'm genuinely gutted. I imagine it's a veneer, but I also imagine finding a replacement veneer would be borderline impossible. Not to mention the fact I'd probably need to use...

Dear all, I have a Yamaha RX-A3030 reciever that I have been working on for a while - it has an issue I can't figure out, so I hope that one of you can help me further! The SR (Surround Right) channel is outputting 0.85 VDC, while all the others read -1.0 VDC. The amp shuts off after a few...

Hi. Read through some of the posts on the subject and can’t find what I’m looking for. I just repaired a Sony STR-V3. I changed all the caps and transistors on the output amp board. I used what I think are reasonable equivalent transistors. Planning to put it up for sale and I always do a « burn...

Hello, New member here in search of advice on a problem with my Pioneer GR-560 Graphic Equaliser. I’ve had the unit for several years and it’s been absolutely great! On a power-up recently I heard a loud bang through the speakers, followed by a low buzzing. I’ve spent some time with Google...

So, I went and bought myself a vintage integrated amp to replace my NAD C 720BEE receiver. The SU-V4X was sold as defective, with sound in only the right speaker channel, so I went into this knowing it would be a restoration project. I've never done anything like this before, but my mind is set...

Hi All (and especially anyone with Japan experience), I just picked up a Micro-Seiki SX-555FVW with a RP-1110 pump at an auction in Japan, and am hoping to have it serviced before I pick it up in Japan later this year or early next year. I previously had Amp8 overhaul a Micro-Seiki RX-2000...

Hi all, I am hoping to find someone super familiar with the Dual 1019. I am pretty novice when it comes to turntables, and I inherited my grandfather's 1019 when he passed. It would engage the motor when clicked to "start" but the motor would not continuously run. The "stop" motor put the...

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...

Sorry if this isn't the right thread to post this in, I'm still new here. I picked up some ESS AMT 1Cs for a bargain, however they are missing the rear speaker, not sure if they were passive radiators or not. However I figure this gives me an opportunity to upgrade the speakers since I've read...

I got this MCS 3233 from my dad several years ago and in the process of upgrading it (complete recap, replaced output transistors) we've discovered a hum coming from the power supply that we can't get to go away. Thanks to this forum (so many helpful posts!!) we've been able to address most...

Hi all, as the title says, I have a couple small but annoying problems with this rare quadraphonic receiver. I think I know what the issues are but this is my first time trying to track down and rectify such problems. I'd like some guidance on where to look for my problems and what to replace...

Hi All, I am in need of a well regarded and trusted service engineer for some older high end amps. Based in the UK. Specifically; Mark Levinson 33h, 334 & 27.5 ECS EA-2 Currently the ECS is the only amplifier which actually needs repair - dropping out on one channel. God help me when the...

I've been using this turntable I bought refurbished for a year now, and slowly the automatic movement of the tonearm has degraded. Can anybody please give me some advice on how to fix? The issue is that when I start the record player, the arm doesn't move over, it simply raises and falls...

Hi all, New to the forum and I have a question. I recently picked up a very nice condition Marantz from my local thrift store for only 20 bucks. Since I bought it, it's had some very obvious speed problems. I've repaired electronics as a hobby for close to a decade now, so I figured whatever was...

Hi, I have had this Kenwood KA-5500 for a while now, and since I have had it, it has had an issue where the left channel volume was higher than the right and after it had been running for a bit I would get scratchiness / static in both channels (Even with volume all the way down) and shortly...