Pioneer Reverb SR-303 Not Powering On.

[ajohnnyz]

Hmm, that means that either you have an intermittent problem in the preamp or the problem is in the amp. I guess try another preamp with the amp and see what happens.

OK it ran all night long with the signal going in audience one and monitoring the output and balance works perfectly.

This morning I plugged in the new little preamp I just bought and right from the start balance works turning it to the left, you only get the left signal in the headphones, but when you turn it to all the way to the right you still get both. I can hear it trying to do something when I turn it to the right but both channels are still there when it's all the way to the right for the most part. I don't have speakers on the bench, but I know it's the same through the speaker outs as it is through the headphones. So it's definitely an issue within Preamp the spec 1, not the amp,

 

[dr*audio]

OK it ran all night long with the signal going in audience one and monitoring the output and balance works perfectly.

This morning I plugged in the new little preamp I just bought and right from the start balance works turning it to the left, you only get the left signal in the headphones, but when you turn it to all the way to the right you still get both. I can hear it trying to do something when I turn it to the right but both channels are still there when it's all the way to the right for the most part. I don't have speakers on the bench, but I know it's the same through the speaker outs as it is through the headphones. So it's definitely an issue within Preamp the spec 1, not the amp,

You plugged another preamp in, or an amp? Or did you use a second preamp because it has a headphone amp in it?
You know, the Spec1 has an Output 1 and an Output 2. Are you maybe connecting to the Output 1 and Output 2 instead of Output 1 Left and Right?

 

[ajohnnyz]

You plugged another preamp in, or an amp? Or did you use a second preamp because it has a headphone amp in it?
You know, the Spec1 has an Output 1 and an Output 2. Are you maybe connecting to the Output 1 and Output 2 instead of Output 1 Left and Right?

I used another AMP. And yes its plugged in correctly. And FYI I tested Aux1 and Aux2, no difference there. And now we know the issue is the spec 1 because it does the same thing when I have my Pioneer Spec 2 plugged into it.

Definitely a weird issue Balance works fine through the input and the output but not on power side of things speakers or headphones. It just doesn't seem to make any sense because it leaves the preamp working fine. It comes back in through the AMP not working fine, And that happens with both amps.

 

[ajohnnyz]

You plugged another preamp in, or an amp? Or did you use a second preamp because it has a headphone amp in it?
You know, the Spec1 has an Output 1 and an Output 2. Are you maybe connecting to the Output 1 and Output 2 instead of Output 1 Left and Right?

OK narrowing it down. When I mess around with the wires going to the power input I get all kinds of things going on with the balance. I am going to have a better look at those and see if there's some broken off wires in there or what's going on?

Bummer, no that is not the issus. Well yeah maybe an issue somewhere along that line but not right there on the back.

And when doing that test with wave set to default on aux 1 or 2 signals are way off when the balance is in the center one channel's completely different, a lot lower than the other channel but, if I set it to 440 MV they line up. I'm not sure that tells us anything or not?

 

[dr*audio]

OK narrowing it down. When I mess around with the wires going to the power input I get all kinds of things going on with the balance. I am going to have a better look at those and see if there's some broken off wires in there or what's going on?

Bummer, no that is not the issus. Well yeah maybe an issue somewhere along that line but not right there on the back.

And when doing that test with wave set to default on aux 1 or 2 signals are way off when the balance is in the center one channel's completely different, a lot lower than the other channel but, if I set it to 440 MV they line up. I'm not sure that tells us anything or not?

What is "default?"

 

[dr*audio]

I used another AMP. And yes its plugged in correctly. And FYI I tested Aux1 and Aux2, no difference there. And now we know the issue is the spec 1 because it does the same thing when I have my Pioneer Spec 2 plugged into it.

Definitely a weird issue Balance works fine through the input and the output but not on power side of things speakers or headphones. It just doesn't seem to make any sense because it leaves the preamp working fine. It comes back in through the AMP not working fine, And that happens with both amps.

With the power off and your meter on Ohms, measure the resistance between:
1. The chassis and each of the outer rings of the output RCA connectors.
2. The outer ring of the L output jack to the outer ring of the R Output jack.
Do this with nothing connected to the jacks.

 

[ajohnnyz]

What is "default?"

And it's actually working fine on default now I don't know what was going on?

 

[ajohnnyz]

With the power off and your meter on Ohms, measure the resistance between:
1. The chassis and each of the outer rings of the output RCA connectors.
2. The outer ring of the L output jack to the outer ring of the R Output jack.
Do this with nothing connected to the jacks.

Output 1: Left .08 Right 1.500M
Output 2: Left .08 Right .08

 

[dr*audio]

Output 1: Left .08 Right 1.500M
Output 2: Left .08 Right .08

You have an open ground on the Output 1 Righ jack. Fix it or use Output 2. I bet that will fix the problem.

 

[ajohnnyz]

You have an open ground on the Output 1 Righ jack. Fix it or use Output 2. I bet that will fix the problem.

The balance has the same issue when using output 2. I've checked all that I just double checked it balance has the same issue using the output either output is the same.

And I ran the wave in on Aux 1 and 2 Put the scope on outputs one and two and the ballots work perfectly for two days on all of it's only introducing power that's having a issue. I think the inputs and the outputs are working OK according to the scope.

 

[ajohnnyz]

I just don't know what to do at this point? Obviously this is taking a lot of our time and I'm we're not getting anywhere. I have a list a mile long and I'm not able to cross anything off. This thing is spread across my bench right now and I'm not getting anywhere and it's so frustrating.

 

[mikiekimi]

Is this only happening when you route the speaker wires BACK to the SPEC-1? In other words, if you run the amp directly to the speakers (either the Pioneer or the little amp) does the balance issue persist?

I'm not familiar with the SPEC line, and I am assuming you can run from Preamp > Amp > Speakers and that you do NOT need to run Preamp > Amp > Preamp > Speakers (if that makes sense).

 

[ajohnnyz]

Is this only happening when you route the speaker wires BACK to the SPEC-1? In other words, if you run the amp directly to the speakers (either the Pioneer or the little amp) does the balance issue persist?

I'm not familiar with the SPEC line, and I am assuming you can run from Preamp > Amp > Speakers and that you do NOT need to run Preamp > Amp > Preamp > Speakers (if that makes sense).

I would say yes because it happens through the headphones also

 

[ajohnnyz]

And again I wanna repost this past history. years ago I was doing work on the 082 board and I shorted something out and took out a bunch of stuff and I ended up going through it and replacing a whole bunch of things. I just wanna point this out I'm not sure how all this ties together. I'm assuming things go through the 082 board before they go to the 083 Three bored that the balance is on. Again I am lost when it comes to figuring anything out. If someone holds my hand, I can test and do whatever they want and I have no problem changing out components if they tell me what to order....

I have a guy I can bring this to, He's very expensive.... I bought all the stuff years ago during Covid trying to learn how to do this so I have everything needed I just don't know how to do it. And it's frustrating for me because there's nothing I can't do but this.

But at the same time, time is money And after weeks of trying to fix this it may be time to cut my losses and send it to takes a guy?

 

[mikiekimi]

I would say yes because it happens through the headphones also

A little feedback for you...you have a bad habit of NOT answering the questions directly, or answering questions that are not asked.

So, have you CONFIRMED that it only does it when re-routed through the SPEC-1?

 

[ajohnnyz]

And again I wanna repost this past history. years ago I was doing work on the 082 board and I shorted something out and took out a bunch of stuff and I ended up going through it and replacing a whole bunch of things. I just wanna point this out I'm not sure how all this ties together.

A little feedback for you...you have a bad habit of NOT answering the questions directly, or answering questions that are not asked.

So, have you CONFIRMED that it only does it when re-routed through the SPEC-1?

so yes when having the amp hooked up I have the issue, I have 2 amps that I have tested with to rule out the spec 1 having the issue. When the wave is running on Aux 1 in and scop on output 1 or output 2, balence works fine, when I hook up an AMP and CD player to Aux 1, or Aux 2, and output 1 or output to 2 to AMP Balance does not work correctly on headphones. Turning it one way works perfectly Turn it the other way does not.

I don't have speakers on my test bench but I've tested this in the rock with the speakers and the results are the same with the speak as in the headphones.

So yeah you're right I'm not isolating the problem as the signal coming out of the outputs...

I don't have any speakers here in the garage that I can use for that. But I do have a scope here?

 

[mikiekimi]

And again I wanna repost this past history. years ago I was doing work on the 082 board and I shorted something out and took out a bunch of stuff and I ended up going through it and replacing a whole bunch of things. I just wanna point this out I'm not sure how all this ties together. I'm assuming things go through the 082 board before they go to the 083 Three bored that the balance is on. Again I am lost when it comes to figuring anything out. If someone holds my hand, I can test and do whatever they want and I have no problem changing out components if they tell me what to order....

I have a guy I can bring this to, He's very expensive.... I bought all the stuff years ago during Covid trying to learn how to do this so I have everything needed I just don't know how to do it. And it's frustrating for me because there's nothing I can't do but this.

But at the same time, time is money And after weeks of trying to fix this it may be time to cut my losses and send it to takes a guy?

It's impossible for any of us to know the extent of the damage, it's also very difficult for us to 'hold your hand' when you keep letting go

While this thread has been incredibly entertaining to watch, I think you should cut your losses and take it to the tech.

 

[ajohnnyz]

It's impossible for any of us to know the extent of the damage, it's also very difficult for us to 'hold your hand' when you keep letting go

While this thread has been incredibly entertaining to watch, I think you should cut your losses and take it to the tech.

OK I just hooked up two speakers to the AMP and balance works fine.

So it has something to do with when the amp goes back into the preamp. Hopefully that narrows it down That's what I've been trying to say for a while now I think a lots been lost in translation - Sorry

 

[mikiekimi]

I don't have speakers on my test bench but I've tested this in the rock with the speakers and the results are the same with the speak as in the headphones.

So yeah you're right I'm not isolating the problem as the signal coming out of the outputs...

I don't have any speakers here in the garage that I can use for that. But I do have a scope here?

We are all 'trust by verify' folks, so what you claim you did, doesn't matter

It's not a test bench without access to some test speakers. As I look over the SM, I only see relays between the line level input and the SPEC-1 speaker terminals so I'm not sure that's where the problem lies, unless there's some kind of grounding issue.

I asked if you ran the amp directly to speakers because you mentioned something about 'things going on' with balance when you messed with the wires (by wires, I assume you mean speaker wires and not RCA cables).

Bypass the line level speaker input on the SPEC 1 from the amp and see what happens, worse case you rule out the speaker line inputs/outputs as the issue.

You could also connect using dummy loads and use your scope (again, dummy loads connected directly to the AMP and connected to the SPEC-1). If you don't have dummy loads you need to find some speakers and NOT USE the SPEC-1 speaker terminals.

So you're going to run it SPEC-1 >> AMP >> SPEAKERS (or DUMMY LOADS). No re-routing back to the preamp. See what happens.

 

[mikiekimi]

OK I just hooked up two speakers to the AMP and balance works fine.

So it has something to do with when the amp goes back into the preamp. Hopefully that narrows it down That's what I've been trying to say for a while now I think a lots been lost in translation.

Sorry our messages crossed...

Is there a reason you need to run the amp back into the SPEC-1? Are you running more than one set of speakers?