pioneer sx

Hi newbie here and learning. Does anyone know of the chassis on the SX950 is cadmium plated? Have some white stuff that doesn’t look like dust, more like ground up styrofoam and lots of it on the bottom portion of the chassis. Just trying to determine what the situation is. Any insight as...

So I just picked up a Pioneer sx440 a couple months ago.Cleaned it up sounded good until today. I put on a cd with heavy bass and all of a sudden my right channel on both a and b does not sound good.Music coming out but if I turn it up it starts crackling out of both the woofer and tweeter.Im...

Greetings, So here’s an issue I have never encountered. The balance pot not functioning. When centered, the sound is crap, and seems like any sound below 1000Hz is cut off. Turn to either left or right and get great stereo sound. I had a hum also so adventured to remove the balance pot and...

Hello all. Strange problem I can't figure out. I just recapped my SX 680 and all went well. No issues. Well, one. I have a mysterious situation with the FM light. On power up the light will sometimes come on and sometimes not. At first it would always be off and then light up after about a...

Oops, I had to correct the header! Hello to all the enthusiasts out there. I have been lurking around here since 7/1/2007. My only post was to list my Pioneer gear. Now I am asking for some advice. The 1050 had a low and distorted right channel, that is what started this odyssey. I had recapped...

Hello! I've owned an sx680 for about 4 years and has been great. I recently shipped it from my home town to where I live, and it worked fine for about a week and then stopped working.. No sound from the speakers from the AUX input. I've since taken it apart, and tested voltage throughout...

Hello, I need some help with a SX-950. I received it with the following components blown Four power transistor - Replaced all with "original" 2SB557/2SD427 from eBay Both 2SB536 One C1628 Both Bias pots blown 150 ohm R40,R39 I have replaced these transistors 2SB536 with KSA940 2SD381 with...

Hello all! recently acquired this marvelous SX-1280 - been looking for one for a while. I also have an SX-980 which i recapped myself back in 2011. Here are some pictures that I managed to take while restoring this big old dog. re soldered all of the solder joints, full recap and replacement of...

Been running this unit for a few weeks with no issues. Suddenly upon startup, it fails to get FM signal in the middle of the tuner, but still will at the far ends. After about 20 minutes, the problem manages to right itself and tuning isn't a problem. Any thoughts as to what this may be are...

I stumbled upon what appears to be an official Pioneer publication and contains schematics and foil layouts for quite a few 70's receivers. I've never seen one of these before! I'm scanning them now (hi res, multi-page), I'll re-compose each into a single image, and post the PDFs as soon as...

I've seen several comments about "gold" or "bronze" colored Pioneer SX receivers from the "silver-face" era. I've collected quite a few SX-424, SX-525, SX-626, SX-727 and SX-636 units over the last six months (refurbishing them to compare to my HK 330B's and pick the one I like best, then sell...

Help please

Hi AK'ers I wonder if I can modify the tone control in my Pioneer SX-1080, by changing the value on some capacitors on the tone control board? I've read a couple of places that the specs of the caps can enhance/reduce the amount of bass/treble an amp (pre-amp?) will let out, and also a while...

I recently acquired a sx-850 in near mint condition, but has a no sound issue. It will power up and pull in the fm stations with ease but has no sound output. Turn on and in about 15 seconds I hear a click from the clear contact box( speaker protect switch??) I did print out a service manual and...

Hello, I was listening to music on my SX-737 about an hour ago and the sound just stopped. I turned off the receiver and turned it back on and... no click from the receiver at. I'm getting absolutely no audio output. I had an issue previously on the B-Channel where my right speaker would start...

Hi Everyone, Thanks for looking into my issue. I can hook up a Bose Soundlink II on a tape port, and get FM fine. Just bought B&W 685 S2 and hooked up on SpkA, no sound. Same thing with moving them to SpkB, and SpkC. I don't know if this helps, but even without any speakers attached, before I...