Pioneer SA-520 hums The Electric Company vs Sound Of Silence

[orange]

Re: Pioneer SA-520 hums The Electric Company vs Sound Of Sil

Is this your British guy?

http://www.littlediode.com/components/2SB773.html?

Pioneer lists a substitute for the original part but I think it's a KIT and not a part. NLA or you'd need to log in. Still 43 bucks.


AVIONIC KNOWS! 2011 AK archive.

http://www.audiokarma.org/forums/archiv ... 58929.html

 

[jbeckva]

Re: Pioneer SA-520 hums The Electric Company vs Sound Of Sil

Yep I see, but we're still stuck with having to mod the heatsink mountings (none of 'em have the "wings"). If you're ok with that, let's do it..

 

[orange]

Re: Pioneer SA-520 hums The Electric Company vs Sound Of Sil

So you're telling me it's a Maxi with wings? Verrry interesting.

Got a dead hard drive or optical drive? or PS...

What do they call the white 5/12 V connectors...MOLEX? or something.[attachment=1:2y92tnrg]connector.GIF[/attachment:2y92tnrg]

Try this...[attachment=0:2y92tnrg]connector with output.GIF[/attachment:2y92tnrg]

 

[jbeckva]

Re: Pioneer SA-520 hums The Electric Company vs Sound Of Sil

Ah geeze.... ok.. I am going to get replacements for the outputs that are not going to fit the heatsink. I am going to modify said heatsink to make the new outputs fit. I am going to place the order here in about 5 hours from now.

Unless told otherwise....

 

[orange]

Re: Pioneer SA-520 hums The Electric Company vs Sound Of Sil

I don't know...they're not kissing each other. I'm looking at an open EVO tower and that came to me. Besides, I saw that connector from the turntable to the board of an early Sony HP-series miniconsole I converted over to give my niece once. I know it's a useful part

I have no plutonium to get to 1.21 gigawatts you know.

 

[orange]

Re: Pioneer SA-520 hums The Electric Company vs Sound Of Sil

Pioneer 1-800-421-1404

You have to wait until Monday though, 10 am - 7:30 pm

Parts is 1-800-228-7221 same hours

It never hurts to ask Pioneer, and did you note the NTE replacements yet?

 

[jbeckva]

Re: Pioneer SA-520 hums The Electric Company vs Sound Of Sil

Yes I did - nothing other than the originals are a "perfect fit".

The original transistors are not feasible. And I also have other parts to order. Last chance..

 

[jbeckva]

Re: Pioneer SA-520 hums The Electric Company vs Sound Of Sil

Would one of he big Sankens sub for it??

Might not work in the physical sense. The leads come up to solder pads from the heatsink, and where they pass through the board has limited space. "Fat" leads might be too close of a call.

 

[laatsch55]

Re: Pioneer SA-520 hums The Electric Company vs Sound Of Sil

OK. Something l;ike this??

 

[jbeckva]

Re: Pioneer SA-520 hums The Electric Company vs Sound Of Sil

OK. Something l;ike this??

Well sure.. but those too are going to need to be "adjusted" to mount on the heat sink.

I don't think tweakerin' a little bit on the heatsink is a big deal at all. I'd probably go with those MJ's that Dave suggested in the AK thread (not the ones he "oops" on that are TO-3's, but the TO-220's I think).

Steven.. all indications here point to the originals not being made anymore, and whoever has a stash of them is trying to make a ridiculous buck. If I had to replace all 4 with originals, hell.. I'd go buy this here for a few bucks more and send it to ya.

Working SA-520

Those MJ's that Dave suggested in the AK thread will need just a little bit of tweakin' to get mounted, but it's nothing major. And a few guys 'round here rather "like" the ON Semi products, so when it's all said and done you'll have the "bionic man" version of the SA-520... "on the house", too.

 

[orange]

Re: Pioneer SA-520 hums The Electric Company vs Sound Of Sil

They are used in SA-6500 II as well.

I've been through this before, you just have to sleuth...

My friend in South Korea located the last pair but like I said, all was lost by accident when Lee's boys helped him clean out his closed shop.

It's only 30 watts per channel. I don't want a PIOWO.

What are the outputs in an SA-1040, any matches? There are 5 per side, I have one. It worked until I accident stepped on a speaker wire. They were made to limit damage by stopping it at the first few transistors but this one couldn't get shut down fast enough

You need to look in Pioneer parts. I'll go looking, I'm not rushed.

 

[jbeckva]

Re: Pioneer SA-520 hums The Electric Company vs Sound Of Sil

I will give you two days to find the originals for under 5 apiece, then it's coming back unfixed.

 

[orange]

Re: Pioneer SA-520 hums The Electric Company vs Sound Of Sil

I don't remember wings on the 6500 II either but the parts cross there and 3600

I keep telling Mark L. I find his PL-115D part all the time

http://www.ebay.com/itm/Pioneer-pl-12d- ... 0880079593" onclick="window.open(this.href);return false;" onclick="window.open(this.href);return false;" onclick="window.open(this.href);return false;

This parts lot is only $9.99 BIN!

http://www.ebay.com/itm/Pioneer-PL-112D ... 0897587376

Totally sick! You could fix it for a while!

Spend a million bucks, rebuild an RT-909 I guess/ Somebody had fun taking it apart so you could *^%*( reassemble it.

Just wait until Monday so you can ask Pioneer parts. It's not killing me to wait. I realize SA-6500 IIs are really hot for sellers right now and parts like that aren't so available used but I've found usage over three models and they seem to have been used a while.

Thanks. I appreciate your help a lot!

 

[orange]

Re: Pioneer SA-520 hums The Electric Company vs Sound Of Sil

I spent seven months looking for an STK module, 2 years to repair a bad one on an Onkyo. Go ahead and ask Pioneer Monday and proceed from what they can suggest, please? I'm not trying to bug you nor am I afraid of stuff but I want to be able to look at it down the line and figure it out when I'm to that point. There are no repair shops for 30 miles, much less a Radio Shack anymore.

I don't need another box of broken stuff in here anyway. If you're really going to do that, recycle it.

 

[laatsch55]

Re: Pioneer SA-520 hums The Electric Company vs Sound Of Sil

Styeve, what I think Jer is wanting to know is if you'd be OK with him modifying it as Avionic did in the AK thread. That's all.

 

[jbeckva]

Re: Pioneer SA-520 hums The Electric Company vs Sound Of Sil

Might be screwed anyway tho. What worries me is that R61 (39 ohms) here appears to have flamed out. Not a big deal, but it may have taken D3 out with it. D3 looks to be one of those triple diodes used for temp compensation.

Wondering how I can test D3 out? Can I put it in a quick circuit with a current limiting resistor and figure it should be dropping around .6 volts x 3 or 1.8 volts, when forward biased?

Q17's definitely toast too, by the way.. Shorted E-C.

Steven if you want to call 'em on those output parts go ahead I'll wait. But I'm telling ya.. the replacements handle more current, are BRAND new, and I just may be able to NOT modify anything. I'm looking at the plastic clamp now, and it may just work fine with a TO-220 package style.

 

[avionic]

Re: Pioneer SA-520 hums The Electric Company vs Sound Of Sil

Jerry--If you need some clamping bars milled out of aluminum.Let me know.All I need is a rough dimension and spacing measurements for the two hold down screws.
Plastic may work OK for a while ,but will most likely loosen up with heating/cooling cycles.

 

[avionic]

Re: Pioneer SA-520 hums The Electric Company vs Sound Of Sil

Orange-Only way your going to get a set of original outputs"batwings"..Is a parts unit.A parts unit is and iffy proposition--the outputs might be good or may be the reason its a parts unit...The outputs that jerry has in mind are almost indestructable " I said almost".. And won't sound any different than the original TO-220's..

 

[avionic]

Re: Pioneer SA-520 hums The Electric Company vs Sound Of Sil

Might be screwed anyway tho. What worries me is that R61 (39 ohms) here appears to have flamed out. Not a big deal, but it may have taken D3 out with it. D3 looks to be one of those triple diodes used for temp compensation.

Wondering how I can test D3 out? Can I put it in a quick circuit with a current limiting resistor and figure it should be dropping around .6 volts x 3 or 1.8 volts, when forward biased?

Q17's definitely toast too, by the way.. Shorted E-C.

Steven if you want to call 'em on those output parts go ahead I'll wait. But I'm telling ya.. the replacements handle more current, are BRAND new, and I just may be able to NOT modify anything. I'm looking at the plastic clamp now, and it may just work fine with a TO-220 package style.

Are they STV3 or 4 diodes?

 

[orange]

Re: Pioneer SA-520 hums The Electric Company vs Sound Of Sil

Well, I KNOW it flamed out, said it took up a Dutch pipe earlier.

What I said about the outputs was that the originals were being installed as far back as 1974-5, appeared in SX-3600 as well, which is usually easier to find parts units for than SA-6500/6500 II, apparently the hot Pioneer on eBay although it's tougher than bat guano to sell them at the prices they've asked for...I have no idea but that sorta precludes all but knobs and frame parts.

It's hardly like I'm trying to avoid a shot (not THAT kind at least, I postponed using the computer for thirty minutes after I had to report something unIDed down the way). When Lee had to close his shop after his amputation we almost had my SA-6500 II going. The output for the bad channel were needed but not the complete solution. A new selector switch was in as well. When he brought over his sons to help him move out the unit was misplaced and possibly dumped or something but it was lost when I came over to pick up my other things. He gave me a couple things he didn't need or wouldn't sell off for my bench I've been slowly working on and a Leader LAB-160 for losing the SA.

I don't have an EE and don't always get everything but I just long to get out of this shitty year with braincells left. I'm trying to help, especially because I know the next time I will be dealing with it and I'll want to make sense of it.

That is why I asked.