Got the itch to fix some vintage audio equipment, so I scored the Grundig off ebay for 20€. Seller said it is quiet and has some noise.

The inside is prestine, no dust. That diode was the only sus thing I could find. So we'll see if swapping that fixes it.

Found a pair of JBL G500 speakers in my neighborhood while walking the dogs. The speakers look perfect with no deterioration of foam surrounds. They sound pretty good (to my ears with my hearing aids) but the bottom woofer on one of them has a problem. at higher volume the bottom woofer sounds distorted with a fuzzy crackling sound. When I press in on the woofer cone, there is a rubbing sound from within. the upper woofer is silent when pushed. the rubbing is present no matter where i PUSH.......12....3......6.......9 O"CLOCK. any clues on troubleshooting or repair. I will remove the speaker tomorrow to check it out. Thanks

Picked this up at an estate sale yesterday, probably evened out to $10 or so. Since I got it, I’ve cleaned the laser very well and that eliminated most of the skipping that initially happened - however if I play something that isn’t in absolutely perfect shape it has a tendency to skip just a little bit on occasion, to the point where it’s a hindrance. I’m not inclined to believe it’s a laser issue as it’ll seek tracks and load the table of contents very quickly even on super scratched discs. I’ve tested these discs in an ‘89 Sharp player and multiple different Xboxes I own and it plays them just fine. I saw a mention of laser rails being a possibility but otherwise I can’t figure it out.

I bought a used pair of **Sven SPS-702** speakers. I've been using them for over a month, but today the active speaker started glitching. Sometimes, while I'm listening to music, watching a video, or playing a game (especially GTA IV), the active speaker suddenly cuts out. This happens no matter what I do, but the passive speaker keeps working perfectly. When the sound disappears, the LED indicator on the active speaker stays lit, and the passive one keeps playing just as good as before. What could be the problem?

Recently started a vintage audio repair shop. Until now I have been able to find most service manuals and schematic diagrams online. At the moment I'm struggeling to find a service manual for an Onkyo Super Server Stereo P-3090 pre amp where the schematic diagram is actually readable.

Does anybody know how or where to get a better quality then online availabe?

Hi all, I have several transistor dead.

I have to replace them, I'm a newbie and I use IA to find a solution.

I tried 3 differents IA and they give me differents replies.

Could a pro give me the right transistors to replace this

TO220 :

• 2SB596
• 2SD526

TO92:

• 2SA697
• 2SC1211

Thanks a lot

nach längerem Suchen eine einfache Lösung gefunden um die volle Funktionalität der Soundtouch Geräte wieder herzustellen.

Was brauche ich dazu?

Nur meinen Heimrouter ( Fritzbox)

Wie gehe ich vor ?

In Menü von der Fritzbox aktiviere ich den Media-Server. ( Häkchen setzen),

dort gehe ich auf den Reiter Internetradio und füge Internetadressen meiner Radiosenden hinzu.

Diese finde ich ebenfalls im Internet.( Achtung Bose spielt aber nur das Format.M3u sauber ab.)

Dann die Soundtouch App öffnen und dort die Fritzbox suchen und auswählen

dort in den Internetradioreiter gehen einen Sender auswählen - Stream auswählen

dann läuft der Sender auf der Box . Nun die entsprechende Senderspeichertaste auf der Box solange drücken bis Sender kurz weggeht .

Jetzt ist die Stations-Taste mit dem Sender verheiratet und lässt sich auch ohne Handy bedienen, direkt an der Box oder mit der Fernbedienung.

Das bei all deinen Boxen wiederholen.

Letztendlich übernimmt deine Fritzbox die Aufgabe des Servers von Bose, der ja bekanntlicher Weise abgeschaltet ist.

Multiroom geht sowieso noch.

Ich hoffe nur das viele ihre doch tollen Boxen nicht für billig Geld verklimpert haben aus Frust.

Es gibt immer eine Lösung !

Hello all, I am trying to run one MC58 in bridge mode from a CR16 and cannot get the bridged speakers to play. I would like help to confirm the correct wiring for this combination.

Equipment:
CR16 multizone controller
MC58, all four pairs set to Bridge, intended as four bridged channels
Zone 1: MC275, not using the MC58
Zones 2 and 3: two B&W AM-1s each, so each zone needs two bridged MC58 channels
Zone 4: no speakers

Sources: MP100 on AUX, MB50 on CD2
Trigger chain currently: CR16 to MP100 to MC58 to MC275, using 1/8-inch power control
7-pin DIN from the CR16 multi-channel DIN, the jack beside the DB25, to the MC58 MULTI-ROOM jack
DB25 is not connected

Audio is on the odd RCA inputs: 1, 3, 5, and 7
MC58 rear switch is Remote, front power switch is on.

What the MC58 actually does:
CR16 Zone 2 on lights only the 3/4 pair
CR16 Zone 3 on lights only the 5/6 pair
CR16 Zone 4 on lights the 7/8 pair, even though Zone 4 has no audio output connected
CR16 Zone 1 on does not light the 1/2 pair. Zone 1 audio goes to the MC275 only
With the DIN unplugged, the logo comes on at startup but no pair lamps light, including with the 1/8-inch trigger connected
Result: a bridged stereo zone needs two powered pairs, but each CR16 zone enables only one pair, and 1/2 never enables. The bridged speakers have no sound.

Any thoughts are appreciated as I can’t get this to work. Incidentally, all the equipment is in a front load only audio rack so it’s quite difficult to remove and readjust..

These PW-2522BM woofers have stiff surrounds, thus very little movement. I've been advised to apply some brake fluid. Is this wise?

Advice appreciated

I’ve just moved flat from the U.K. to Spain and in the move my Denon receiver looks like it took a bit of a whack, the front panel has a dent etc. I went to turn it on and it boots before going onto the blinking red light issue after a couple of seconds. I’ve downloaded the repair manual and gone through the debug process and when I disconnect the speaker board the amp stays on and it displays that the previous fault was an ASO protection which apparently means there is a short in the signal path, such as speaker wires touching but it happens even when no speakers are connected. Does anyone have experience with these in the past? The fuses are fine. The PSU is producing the correct voltages when the rest of the pcbs are disconnected so I don’t think it’s the PSU issue some other owners have had. I’ve tested the transistors and resistors on the amp board and I don’t think any are off, the parallel pairs are measuring between 0.2 and 0.3 for parrallel .47Rs and the transistors are doing 0.45-0.65V between the legs. Some of the resistors do have some discolouration though that they might have got a bit hot at some point. My feeling is it is a loose connection somewhere but I can’t see it and I’m not too keen on going further into the big hdmi/power amp pcb stack as I don’t think I’ll get it back together. Is it worth me replacing the resistors in case that is the issue? Any other tips before start removing components?

I have an RCA RS2534 5-disc changer stereo that is not reading discs. I’ve cleaned the lens and lubricated the rails, but still nothing. This is a 25-year-old stereo, so I’m not sure what replacement I can get, if any.

hello i don't know if this is the correct subreddit but i have a question can this adapter works with this radio is a sony hcd bx20i

Hey! I’ve got to replace 1 (!) knob on an old Yamaha mixer, but am struggling to find what the correct name for the type of knob required is. Doesn’t bother me if the replacement doesn’t look similar, it’s purely so the control can function. Any pointers appreciated, I think it’s a D shaft but I’m not having any luck with what to search for the type of design with the two tier style.

How do I access these speaker panels. I see a bunch of screws but we can only get to half of them because of the drop down component compartment on the right side. My mom wants to change the speakers and fix the fabric but we cant tell how they are attached.

My girlfriend has a single Pioneer DJ VM-50 that she runs off her DDJ-REV7. It suddenly stopped producing any sound at all.

The power LED still behaves normally:
It goes red when it drops into auto-standby
It switches back to white when the REV7 wakes up or a track plays.

So it seems to detect the signal and power on, but nothing comes out of either driver.
What we've ruled out:

No hiss at all, even with the volume knob maxed and an ear right against both the woofer and tweeter

The REV7 works fine through headphones

Tried different REV7 outputs, with Master and Booth levels up

Swapped cable ends and wiggled the connections at both ends. No crackle, no sound.
Checked the volume and the settings on the back of the speaker

A shop quoted $300 to fix it, which is close to the cost of a new one.

Honestly, we're pretty new to this and don't really know how to go about diagnosing it. We're both pretty handy with this kind of thing though, so we'd love to try fixing it ourselves if it's realistic. Is this something we could DIY? Any pointers on where to start would be hugely appreciated.

Thanks in advance!

I've had my AXC35 for a number of years, and I love it. Recently, however, the drawer has developed an issue. When a CD is inserted, the unit makes a grinding sound and refuses to recognize the disc. Opening the drawer and then closing it again usually gets the player to recognize the disc and they always play without an issue. Is there a way I can eliminate this problem?

I need a recommendation for repairing my Yamaha KX-580. The right channel has dropped out to about 10% of normal. The VU meters show a normal signal for both channels. The head phones are dead on the right, but that's a preexisting issue. It's my number 2 deck in my main system so it's not a rush job. Still I use it enough I really need it fixed. I live in SW Missouri and there is no one around here that I am aware of. I've been on net but I would still like some direction from.the community. And why does there need to be flair. It reminds me of Office Space.

There is a weird metallic artifact/undertone from the FM section of this Onkyo receiver. Sounds like some kind of bad digital compression. More apparent with music with distortion or reverb, or lots of audience noise. Hear it on all stations, don’t hear it on my car radio with same signal. Not using any of the DSP modes. Is this just how this receiver sounds?

Hi all. Managed to grab a Beosound 3200 and Beolab 2400 set out of a skip the other day. Didn't really know much about it when I picked it up but seems after doing some research I've got pretty bloody lucky.

Unfortunately it doesn't fully work. The Speakers power on and the beosound powers on but not together. Seems like an issue with the connection between them? Also the front panel seems to get a bit stuck when opening and closing. Is this just a case of cleaning it out?

Hope to get it working and tested soon :D

Got some 15 inch Bose speakers this past Christmas and recently I’ve noticed that they haven’t been playing as loud as they used to(they played super loud). Wondering if because I play my music loud, it’s damaged them more and more. Let me know. Thanks

Hi everyone!

I’m a Master’s student in Product Development, conducting research for my master’s thesis on circular design and the repairability of consumer electronics, with a focus on hi-fi equipment such as amplifiers.

I’m looking for people who use hi-fi audio equipment, regardless of their technical knowledge or previous repair experience.

Whether you repair your own equipment or have never attempted a repair, your perspective would be very valuable to my research.

Thank you for your time and contribution!! :)

Survey link: https://docs.google.com/forms/d/e/1FAIpQLScOF1ACzZeIdLZ-vHgwHnAAyzQgS55B48F05K_VNGoGdTRcqg/viewform?usp=header

How to fix these if i must

Hi everyone, recently i had to put my soul cat to sleep due to health issues. I've been wanting to get a build a bear with his Purrs as a sound inside, however the videos i have of his purring are crackly due to my phone. I'm wondering if there's any way anyone can fix this? Or knows of how I can fix it? Any help is immensely appreciated!
I uploaded the video to welink so i can link it here! Welink
(photo above for attention!!)

Never mind how old I am... this was my grandfather's book.

I was showing my son some of the old books I've got, and realized I had never posted any pictures.

Thought you'd enjoy!

Anyone know of a place in the L.A. area?