orionspants
New member
Hello
I'm very much a novice to this whole vintage audio game but have plunged in head first and picked up several systems so far to listen to and see which sound I like the best.
I got a Sansui QRX-3500 just over a week ago, I managed to get the guy down to half his asking since when I had him hook up all 4 speakers it had channels dropping out.
Popped it open and it was immediately apparent that 2 speaker fuses were blown (they were 3.15A instead of 3A) got 2 new ones and it sounds great although the rear right channel needs to be kicked in by way of isolating it on balance and upping the volume (this doesn't need to be done if it was recently used though and warmed up). BTW the 22WRMS seem quite under rated compared with my Pioneer QX-8000a.
So after enjoying the sound on it for almost a week, static/crackling (whatever you want to call it, like radio fuzz) started to occur in the left front channel. Switched speakers and it is def. the FR-LT. Looked again at the fuses and shifted them around, no change, sprayed some Nu-trol Control cleaner (for the 2nd time) around the vital selectors and knobs inside, still nothing. There is no popping sound (unless the channel is isolated and volume tweaked), just static, that increases/decreases with volume control. The static is also not constant, it crackles, seems to come and go at certain intervals.
I switched it over to 2 channel and it's gone (also fine on 4ch discrete). So now I'm quite worried that it's something to do with the matrix/decoder as it only occurs when it's in use. And unfortunately unlike the Pioneer the Sansui does not deliver 2ch sound to all 4 speakers just the front. The inside of this unit shows almost no signs of wear and is in excellent condition. One thing I noticed after opening it up again to check for anything visibly wrong was that when using the Nu-trol all-in-one is that the lubricant does not dissipate, even in open areas, it also built up in places and I wonder if at a certain point too much of this stuff can interfere all at with the current or board?
You may not be able to see it in the photo but the clear wire coverings at these contact points have collected the lube and are full, it totally surrounds the wire. I've since left it open to allow air to move freely and hope some of the excess will dissipate and squeezed most of the deposits out of the ends of the wires, but it made no difference.
It still sounds awesome in 2ch on the front speakers but that's obviously not why I bought a quad.
Hoping the quad folks will know better than on regular audio forums so if anyone could tell me where to start looking for solutions for the static (and dropping channel) I'd really appreciate it!
I'm very much a novice to this whole vintage audio game but have plunged in head first and picked up several systems so far to listen to and see which sound I like the best.
I got a Sansui QRX-3500 just over a week ago, I managed to get the guy down to half his asking since when I had him hook up all 4 speakers it had channels dropping out.
Popped it open and it was immediately apparent that 2 speaker fuses were blown (they were 3.15A instead of 3A) got 2 new ones and it sounds great although the rear right channel needs to be kicked in by way of isolating it on balance and upping the volume (this doesn't need to be done if it was recently used though and warmed up). BTW the 22WRMS seem quite under rated compared with my Pioneer QX-8000a.
So after enjoying the sound on it for almost a week, static/crackling (whatever you want to call it, like radio fuzz) started to occur in the left front channel. Switched speakers and it is def. the FR-LT. Looked again at the fuses and shifted them around, no change, sprayed some Nu-trol Control cleaner (for the 2nd time) around the vital selectors and knobs inside, still nothing. There is no popping sound (unless the channel is isolated and volume tweaked), just static, that increases/decreases with volume control. The static is also not constant, it crackles, seems to come and go at certain intervals.
I switched it over to 2 channel and it's gone (also fine on 4ch discrete). So now I'm quite worried that it's something to do with the matrix/decoder as it only occurs when it's in use. And unfortunately unlike the Pioneer the Sansui does not deliver 2ch sound to all 4 speakers just the front. The inside of this unit shows almost no signs of wear and is in excellent condition. One thing I noticed after opening it up again to check for anything visibly wrong was that when using the Nu-trol all-in-one is that the lubricant does not dissipate, even in open areas, it also built up in places and I wonder if at a certain point too much of this stuff can interfere all at with the current or board?
You may not be able to see it in the photo but the clear wire coverings at these contact points have collected the lube and are full, it totally surrounds the wire. I've since left it open to allow air to move freely and hope some of the excess will dissipate and squeezed most of the deposits out of the ends of the wires, but it made no difference.
It still sounds awesome in 2ch on the front speakers but that's obviously not why I bought a quad.
Hoping the quad folks will know better than on regular audio forums so if anyone could tell me where to start looking for solutions for the static (and dropping channel) I'd really appreciate it!