My Sansui 881 Receiver

[milo63]

Basing on this article but using a Digikey recommended replacement for obsolete cap. Diameter is the same on both.

http://hudsonvalleyhifi.com/archives/2041

"New filter caps were installed. These are Panasonic THA 10000uf 80v which fit perfectly in the existing clamps"

 

[avionic]

Basing on this article but using a Digikey recommended replacement for obsolete cap. Diameter is the same on both.

http://hudsonvalleyhifi.com/archives/2041

"New filter caps were installed. These are Panasonic THA 10000uf 80v which fit perfectly in the existing clamps"

Super....

 

[avionic]

Figured out how to disassemble the backside to get those broken RCA jack solder connections?

 

[milo63]

Figured out how to disassemble the backside to get those broken RCA jack solder connections?

Nope, everything seems to block everything else. I'll figure it out, a lifetime of working on airplanes helps in times like these.

*First, do no harm*

Cleared the deck of the Yamaha M-60 so I could measure the original filter on the 881, I'm golden.

Thanks for your help.

 

[avionic]

Service manual may give you a clue or two.

You need the TO's to work on aircraft..

 

[milo63]

Service manual may give you a clue or two.

You need the TO's to work on aircraft..

TO's and paper a$$holes to hold them together...good times.
Nowadays it's Boeing AMM (Aircraft Maint. Manuals).

 

[avionic]

Nowadays for me its SOP's and CGMP.

 

[milo63]

AUX culprit found and (hopefully) fixed.

In the middle is the back side of the RCA jack, the "tongue" has broken away from the solder. There were two of them that I needed to re-solder with my new bestie Hakko 888.

To access was a bit convoluted.
-Disconnect the SELECTOR shaft and unscrew SELECTOR module from the rear of the unit.
-Separate side frame and move it enough to work the SELECTOR wires up to allow the SELECTOR module to move enough to expose the back of the RCA panel.

All done:

 

[avionic]

Good work..

 

[avionic]

Do you have a glass or window store that my be able to cut you a replacement piece of glass. Or use lexan or use polycarbonate acrylic.

 

[avionic]

Like this..
https://www.mcmaster.com/#8574k27/=1dbdtcx

 

[Oldsansui441]

Nice work on the Aux fix .

 

[milo63]

Do you have a glass or window store that my be able to cut you a replacement piece of glass. Or use lexan or use polycarbonate acrylic.

There's a black (painted?) frame around the glass that might be hard to replicate,

I'll pull it out and stop by a glass shop to see if it's possible.

Thanks for the compliments, it's a new hobby for me and I think I'm going to enjoy it.

 

[milo63]

Dumb questions of the week as I press forward.

the old caps have big honkin' holed lugs to solder to, the new caps are "snap in" (I couldn't find the option of big lugs). Affixing both a resistor and wire to one post seems inelegant. Or did I screw up?

About those resistors, I ordered 3W because I don't know what I'm doing... the resistors coming out look beefier.
Or did I screw up?

 

[avionic]

About those resistors, I ordered 3W because I don't know what I'm doing... the resistors coming out look beefier.
Or did I screw up?

No.. Technology -- doing more with less.

 

[Oldsansui441]

Affixing both a resistor and wire to one post seems inelegant. Or did I screw up?

You could solder a small ring terminal to the snap in leads and then solder your wires/resistors to the ring terminals if that is easier and neater.

 

[milo63]

It took a while to figure out but as the new resistors were smaller I went high and tight with them and wrapped the wires around the remaining terminal length.

Not enough time to do a test run tonight (I have to learn patience).
Tomorrow we rock...or smoke.

Let's hope for rock.

Thanks again for all your help.

 

[Oldsansui441]

I hate to say but l am sure that the wiring on those new caps is incorrect, please don't turn unit on. Refer to your photo of the old main caps, the - of one cap and the + of the other cap are common, then the red wire goes to the positive of one cap and the white wire goes to the negative of the other cap.

 

[milo63]

I hate to say but l am sure that the wiring on those new caps is incorrect, please don't turn unit on. Refer to your photo of the old main caps, the - of one cap and the + of the other cap are common, then the red wire goes to the positive of one cap and the white wire goes to the negative of the other cap.

Doh!!!! I *assumed* signal and ground.

I'll fix that before I light the fires.

A thousand thanks.

 

[Oldsansui441]

Your very welcome, def not the first time this has happened to someone on AK as in a way it seems wrong to tie + of one cap and - of other.