sony

I bought a reconditioned Sony CDP CX300 CD changer. The belts are new, the table motor board and drive train look great. I've tested the original and a second (eBay) table sensor board and all sensors show what I would expect on the scope (0V to+4V) square waves. I was worried about the disc...

I've obtained an old Sony ST-S700ES quite cheaply. It's all working well, as far as I can tell, except that the frequency displayed is a little 'off' - for example, a station on 92.90MHz will only lock on when the tuner displays 92.95MHz. This +0.05 MHz offset is constant throughout the FM...

"Hello friends. I have an old 1990s Sony CFS-W470S boombox. Recently, I wanted to listen to compact cassettes again. But of course, the rubber belts are no longer functional. I removed the cover and saw a confusing situation. I removed three belts and will look for replacements. One belt is...

Hi, A couple days ago I recognized one strange thing on my E77ESD. The first picture coming from USA that the device has additional plate clearly visible (circled in green) other device is produced for Europe area and has not got that plate. So anybody who is from Europe area checked their...

Hi, I need to replace the transistors on a Sony STR-3800L output board as both outputs are shorted. The last four transistors in the list differ with the service manual. References in bold were originally installed in this amp, which may be an early specimen (serial at rear is in the 5007xx...

I just picked up a PSLX 520 that was listed as untested. The tonearm would not move across so I put a new belt on and then everything was fully functional size detection record detection everything except the tonearm would not drop the head once it got into place. I've recapped the power board...

I wanted to say a big thank you to the entire audio community both on AudioKarma and YouTube for all the help and guidance in restoring my Sony TA-5650. As we all know, these amps are no small project—the output FETs are extremely difficult (if not impossible) to find and match properly. I...

Hi all, it was a massive pain in the backside to find these, and there are a few historical threads here searching for them, so I thought I'd link them for posterity. Link contains only the PUA-1500L/S service manuals, PUA-237/287 service manuals, and TTS-3000 service manual. The PUA-1600...

Hello, I'm a repair tech based in Malta (Europe), a client brought in a SONY SCD-1 not reading CDs The unit fails to read the table of contents. After consultation of service manual, the Adjustment mode was used to determine the cause of this failure. Code 30 (Disk check) determines the type...

Hey everyone, I’m quite new to the audio gear world and just starting to get into the hobby. I recently dug out an old amplifier that my dad has had since (I think) the 90s. I honestly have no idea what model it is the only thing I know for sure is that it’s a Sony. It’s definitely seen better...

Hey all. Working on a Sony table that is dropping the tone arm pretty violently due to lack of damping fluid. I have removed the little black rotating push rod and cleaned it and the brass plate it puts pressure against and reapplied some 500k silicone oil, but the tone arm is still dropping...

I bought a Sony PS-LX250H turntable for my roommate. When we hooked up the turntable, we noticed after playing a couple of LPs that it was running slowly and heard some wow and flutter. I ordered a belt replacement and dialed in the 33RPM speed adjustment until the speed was perfect (according...

My current restoration project is a Sony STR-7065A. Aside from the usual problems (dirty contacts/pots, burnt out lamps, etc.), it has a very noticeable hum coming from the transformer. It's moderate when idling, but pushing it to max power into dummy loads gets it buzzing really loud. To be...

Dear all, I inherited a TA-4650 from my dad which had been idle for around 15 years. I used it with great enjoyment for more or less a year before noticing one of the channels was sounding more silent than the other. The difference wasn’t huge, but it was perceptible. Given the reputation of...

So as the title says, I’ve bought 6 Turn tables in a short while, I am new to the hobby as of this year but I think I’ve landed some keepers! The first was a near mint Pioneer PL-630 for a whopping $60, needs some TLC but it plays good just sometimes has speed issues with the quartz lock. Gonna...

Hello, AudioKarma friends. My boyfriend has recently gotten into cassettes (hipster) and purchased a Sony FX-290W Walkman for just under 10 dollars. The seller claimed that the right channel was dead but the device was otherwise in good shape and you can just unplug the headphones slightly and...

I had been looking for a set of vintage Sony ECR-500 headphones and recently won a pair at auction. Actually, I have one each ECR-500 and ECR-400 headphones and a pair of ECR-500 energizer boxes. These took forever to arrive from Iceland, mostly because they spent a bit over two weeks in Chicago...

Hello, everyone! I managed to get my hands on a very rare version of Sony SS-G7s speakers. There is little information about these remarkable speakers on the Internet, but I managed to find some. And now I want to share it with you. In the late 1970s, Sony developed a system with active...

Hi AK - This is my first post so please let me know if there's anything missing or if it needs to go in a different section of the forum. I picked up a Sony TA-AX390 integrated stereo amplifier last spring and have had it for a few months now. I got it for a good deal alongside a separate tuner...

Hi, I am trying to finish restoring a Sony PS-4300 turntable (fully recaped) which speeds start fluctuating after a few minutes. The 2SC1173Y is the output transistor of the motor control circuit (Q110, TO-220, BCE) and tests with a gain of 88 (should be 120+). As I don't have any KSC-1173Y, I...

Hello all, I know its a long shot but I am trying to test/restore/refurb an old mobile Sony Video8 head unit from the mid 80s for a customer and for the life of me cannot find the wiring pinout for the older 11pin style multi-connector or the lower 7pin (which I am assuming are the Video...

OK, well, let's see what is in the Lair: Ignoring the very top shelf as that is where the odds and ends are kept, we see that there's a B & O Beogram 3404 sitting on top of a Technics SL-PD8 and both are connected to the Beomaster 3000-2 on the next shelf down. The Beomaster is driving a Beovox...

Hello! I'm helping a friend repairing his beautiful vintage Sony servo TTS-3000. The problem is only on the 45rpm side: it spins way too fast, at around 75rpm. 33 is working perfectly. Under the unit there's a screw to adjust the speed of both 33 and 45. The 33 allows some small adjustments...

Hi, I recently picked up this awesome all in one Sony HMP-70 system. I have cleaned it myself and everything works fine except a few problems. 1. Left channel speakers do not work. Both speakers work when I switch to mono. Is the left channel fuse out and recs for repair or self trouble...

Thought I write couple of lines how these three compare to me. As it's what I have at home now and been working on these as a new hobby kind of. Setup: Source: MXN10 and RME Babyface Pro Speakers: Beovox S45-2 (rebuilt filters, inside cabling and added SpeakOn connectors) Room: fairly small so...