• The move to the new server is done. There are some software and database maintenance updates in process. This has us passing the hat around to help out. We appreciate any donations. Seriously, even a dollar helps. The payment page may be found here - https://www.audiokarma.org/support.html

sansui ba and ca 3000

Louie b

Louie b

Sansui/nikko
hi, i have a sansui ba and ca 3000 that need a restoration,as of now the ba 3000 has a shorted r01 and ro2 (f2511) also all power transistor are damage ( 2sb554 and 2sd424). plus my ca 3000 has a low filter output shorted issue. if theres any recommended part lists or suggestion for replacement.
if you have a link for schematic, that will help also...please help, thank you and god bless everyone!
 
Register to hide this ad
Louie b said:
hi, i have a sansui ba and ca 3000 that need a restoration,as of now the ba 3000 has a shorted r01 and ro2 (f2511) also all power transistor are damage ( 2sb554 and 2sd424). plus my ca 3000 has a low filter output shorted issue. if theres any recommended part lists or suggestion for replacement.
if you have a link for schematic, that will help also...please help, thank you and god bless everyone!
Click to expand...
These are not easy units to work on, and the fact the thing blew up and with current part shortages, a parts list would be almost useless to you.

Also, if you feel you need a parts list, you should not be working on these. Find an experienced tech.

For a schematic go to Google and search BA-3000 service manual. Plenty of results.
 
Nice system, will be watching the progress once people.
I think you should focus first on repairing your BA 3000, hope you get the help you need from our good folks here...good luck!
Welcome to AK.
:lurk:
 
I've got a tech working on a few issues with my BA3000. Had to replace some parts for the protection circuit and found some "weak" transistors on the left & right outputs, so he's changing them out, too.
Suggest you also replace the meter bulbs- they have plastic covers that degrade and become discolored. He's replaced them with the new/ proper green LED bulbs and they look great.
This was well built- and in many ways- ahead of its time. Have someone who knows truly how to work on it handle it. i can provide his info if you wish.
Bulbs1.jpg Bulbs2.jpg
 

Attachments

Chuck Vance said:
I've got a tech working on a few issues with my BA3000. Had to replace some parts for the protection circuit and found some "weak" transistors on the left & right outputs, so he's changing them out, too.
Suggest you also replace the meter bulbs- they have plastic covers that degrade and become discolored. He's replaced them with the new/ proper green LED bulbs and they look great.
This was well built- and in many ways- ahead of its time. Have someone who knows truly how to work on it handle it. i can provide his info if you wish.
View attachment 2857581 View attachment 2857582
Click to expand...
Green is not remotely close to the original color. Teal, maybe.
 
Look at the photos. Yes, "kinda" teal - but that's the original celophane that covered the bulbs and eventually dried out. See photo 2, which is a "whitish" color when on. It wasn't a "true green" but closer than teal- and I wanted a more green look, which also matches the protection/ power lamp while in normal operation. New bulbs are brighter and more efficient.
Thanks
 
Chuck Vance said:
Look at the photos. Yes, "kinda" teal - but that's the original celophane that covered the bulbs and eventually dried out. See photo 2, which is a "whitish" color when on. It wasn't a "true green" but closer than teal- and I wanted a more green look, which also matches the protection/ power lamp while in normal operation. New bulbs are brighter and more efficient.
Thanks
Click to expand...
 

Attachments

  • 20230924_204528_resized.jpg
    20230924_204528_resized.jpg
    109.4 KB · Views: 47
Louie b said:
hi, i have a sansui ba and ca 3000 that need a restoration,as of now the ba 3000 has a shorted r01 and ro2 (f2511) also all power transistor are damage ( 2sb554 and 2sd424). plus my ca 3000 has a low filter output shorted issue. if theres any recommended part lists or suggestion for replacement.
if you have a link for schematic, that will help also...please help, thank you and god bless everyone!
Click to expand...
Where are you located?
 
You must log in or register to reply here.
Back
Top Bottom