Sansui 5050 - Recap Help, Direction Needed

[SCI OTR]

Hi Everyone,

I have a Sansui 5050 that needs some work.

I have a growing interest in this vintage gear, but don't have any experience working on the stuff.

Couple Questions.

1) Does the sansui 5050 hold any voltage excess when unplugged from the wall outlet? If so, how does one go about bleeding this voltage to safely work on it? This may be a dumb question, but safety first.

2) From my research, I am aware there are different versions of the Sansui 5050. How would I go about determining my actual model and obtain the correct documentation/schematics to work on this unit.

3) Could you guys add links to other AKer repairs done to Sansui 5050 in the past. I definitely want to do my due diligence and research before I dive in.

4) I am thinking Nichicon and Panasonic parts, but any advice would be appreciated. Also links on where to buy this stuff.

5) I'm not in a hurry to do this project, just want to take my time and do it right. Any advice would help prepare me for this undertaking.

Thanks everyone. I will document my findings and repairs for future AKer projects as well.

 

[Hyperion]

Couple Questions.

1) Does the sansui 5050 hold any voltage excess when unplugged from the wall outlet? If so, how does one go about bleeding this voltage to safely work on it? This may be a dumb question, but safety first.

Just leave the unit for 10 minutes, it will discharge itself given time. At least there won't be enough voltage remaining to hurt you after this time.

2) From my research, I am aware there are different versions of the Sansui 5050. How would I go about determining my actual model and obtain the correct documentation/schematics to work on this unit.

Compare the available schematics with the board numbers (F-xxxx) in your unit. Use the schematic that lists your boards.

3) Could you guys add links to other AKer repairs done to Sansui 5050 in the past. I definitely want to do my due diligence and research before I dive in.

You can do a search for this, either with the AK Search function, or typing a keyword ('5050' ?) into your Browser (Google?) - many links will lead back to AK.

4) I am thinking Nichicon and Panasonic parts, but any advice would be appreciated. Also links on where to buy this stuff.

Good choices, I buy almost all my stuff from Mouser.com, and occasionally from Digikey.com, avoid buying components from auction sites However as you don't have much prior experience, buying a capacitor upgrade kit might be the way to go for you. I think you have already had recommended to you seller 'peace.love.and.music' on ebay, who is a trusted supplier of such kits, if he does one for the 5050 he's your go-to supplier - as far as I know AK members don't presently trust anyone else on ebay for this service.

5) I'm not in a hurry to do this project, just want to take my time and do it right. Any advice would help prepare me for this undertaking.

I suggest you read some books and/or watch some Youtube videos on Vintage Audio restoration. You will also need to learn how to solder - this is crucially important skill to have. Often people buy or obtain a piece of old electronic junk with printed circuit boards and use it to try out component removal and replacement including use of a soldering iron - again there are Youtube videos which will help with this.

 

[kwayde]

https://audiokarma.org/forums/index.php?search/82905357/&q=sansui+5050&o=date

 

[milo63]

Lots of fusible resistors and 2SA726 and 2SC1313 to replace.
Mine had a shorted diode on the vertical power supply board, it seems to be a common problem on the 5050.

 

[LBPete]

Don't assume that just replacing the electrolytic caps will fix all issues with it. Mistakes can be made when replacing caps. You run the risk of introducing new issues over your old issues. This greatly complicates troubleshooting. Start by cleaning all the controls and evaluating it's operation before starting the recap.

- Pete