Converting an older Receiver with spring loaded speaker terminals to RCA?

[SeeMoreDigital]

SMD, I'm asking myself that same question. Must have been an option on the same model.

Yeah it's weird....

How different is the layout on the back of your AVR to the picture I uploaded. Are you able to take a photo of the back of your model for comparison?

 

[mandrix]

I have high confidence that those terminals are soldered to the board. If it were me, I would unsolder them and solder jumper wires to the pads freed up by the unsoldering. Those jumpers would go to your new binding post/banana plugs. I’d use the largest guage wire you’re comfortable with. Solid wire should be fine, as there shouldn’t be any flexing once you’re done with the project.

That would be the ideal way. I just really don't want to disassemble the unit. We'll see.

 

[mandrix]

Yeah it's weird....

How different is the layout on the back of your AVR to the picture I uploaded. Are you able to take a photo of the back of your model for comparison?

Not right now...the unit is back in it's place and reconnected for now.
But the layout is the same except the center output is mounted separately.

 

[barfle]

That would be the ideal way. I just really don't want to disassemble the unit. We'll see.

I understand. I’m recapping my Marantz CD400B CD4 decoder, and with all the wires soldered to the board, it would be a bear to remove the board. But with a bracket holding a power supply dropping resistor, and getting in the way a LOT, I’m having second thoughts about pulling the board.

I don’t know that unit’s design, so I don’t really know what’s preventing access to thee bottom of the board.

 

[mandrix]

I understand. I’m recapping my Marantz CD400B CD4 decoder, and with all the wires soldered to the board, it would be a bear to remove the board. But with a bracket holding a power supply dropping resistor, and getting in the way a LOT, I’m having second thoughts about pulling the board.

I don’t know that unit’s design, so I don’t really know what’s preventing access to thee bottom of the board.

I should have taken some more pics. I don't remember how many Daughter cards there are but there's several ribbon cables and looked like it would be a complete time suck to pull everything out.
There's a cabinet length heat sink on the front, don't remember if I looked to see if it has to be removed as well.

Maybe I can pull the unit back out today if time permits and give it a better look.

 

[jimfisheye]

Looks for all the world like soldered on the underside. Ease of fabrication and all.

Yeah, you'll need to disassemble. Use lots of flux. Solder sucker and/or wick. If you can snip some bits of the connector to make for being able to desolder some of the pins one at a time, that can help. Otherwise, lots of flux. Remove as much solder as possible. Little moves like then grabbing a pin end with a tweezers, heating for a brief moment and then gently flexing the pin away the through hole wall. Carefully get them all disconnected and then the connector finally falls away.

Hope that makes sense! Don't pull the pads and traces off the board is all I'm saying. Or you'll have even more rework! Patience and hold your lips just right.

 

[mandrix]

Crappy pic but you get the idea. All terminals removed from housing.

 

[mandrix]

Got carried away with the angle grinder. Aluminum you know, soft.

Going to have to trim the threaded portion...a job for tomorrow I guess.

 

[SeeMoreDigital]

Look at him go!

I like the transparent speaker connectors. Where are they from?

 

[mandrix]

Look at him go!

I like the transparent speaker connectors. Where are they from?

Amazon.
https://www.amazon.com/dp/B0C1Z7KD7V?ref=ppx_yo2ov_dt_b_fed_asin_title

 

[mandrix]

Looking like I may be doing a disassembly to pull the main board out. Argghhh!
1. I dropped a 3mm nut...it appears it may be under the main board.
2. One of the speaker terminals (strip of bare metal) appears to be loose.

If these metal strips that feed the speaker terminals are indeed soldered then I have no idea why one would be so loose.
We'll see, I quit last night when I got tired.

Here's a pic of the original speaker terminals. Yes in this pic two of the ground clips and spring have been removed.

 

[mandrix]

Those springs in the terminals are tiny. No wonder mine are so worn out. lol.

 

[SeeMoreDigital]

Those springs in the terminals are tiny. No wonder mine are so worn out. lol.

I've repaired a few amplifiers and speakers and found those little suckers along with bits of broken plastic inside!

 

[mandrix]

Pulled the board out.
Removed the crappy metal clips.
Soldered in wires.
Banana plugs installed.
Have to solder wiring to banana plugs.

 

[SeeMoreDigital]

It's getting exciting...

 

[mandrix]

It's alive!
Notice how I (cough cough) customized the cabinet paint with a dremel.
Shhhh! Don't tell anyone!

Does it look perfect? No.
Does it function well? Absolutely.

A bit of a jolt at first as I was running pink noise, I could but barely here the speakers. (slap up side the head) Then I checked the volume control on the receiver.

These 'nanner plugs run my 4 height speakers.

 

[mandrix]

Thanks to all who provided their thoughts.