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Sansui AU-417

A

alexmdq

New Member
Hello!
My name is Alex, i live in Argentina...
sorry for my English, is very bad ((((((
I have ampl. sansui au-417 pics in attachment,
Need transistors:
2sd382
2sb537
2sc1904
2sc945
2sa899
2sa750
2sc1400
2sa1105
2sc2580
In Argentina all transistors is fake, when bay original transistors?????
Pleas help me
 

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more pics
 

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Welcome to AK, and the Sansui forum.
Why do you need all those transistors? Did you test all of them out of circuit and they were bad?
Your English is fine.....
I am sure the resident experts will be along shortly.
Casey
 
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Hello ,
Thanks!
I testing all transistors in board F2722/2721 - they are not original, they are different in each board and they are is bad (((
It is desirable to give the working order to amplifier
 
Last edited:
alexmdq, welcome to AudioKarma. Judging by the pictures, you have a lot of work to do. Generally the transistors used in classic Sansui equipment are long out of production. Fortunately there are usually modern replacements available.

To post a list of transistor numbers and demand that someone helps you choose replacements is a little rude. It can be a time consuming process. Many of us are willing to help you repair your amp, but please don't expect valet service.

Here's how you can find the information yourself.

Do an Internet search for each transistor number. Often that will turn up actual original parts or substitution information. Some of the transistors listed are fairly common so there should be information availble. If that doesn't get you what you need, look for data sheets that give the specifications of the original transistors. That information is necessary to find a modern replacement.

- Pete
 
Pete's advice is spot on, and please reply to my question, did you check the suspected parts out of circuit?
It's unlikely that all those will have failed. Also, remember that there are a lot of counterfeit transistors out there, buy from reputable sources only.
 
Hello,
Sorry for my silence.
I check all pieces,
Board F2722:
TR12: 23D382 - Bad
TR13: 2SB537 - Bad
TR09: 2SC945 - Good
TR06: 2SC945 - Bad
TR01: 2SC1400 - Good
TR02: 2SC1400 - Good
TR03: 2SA750 - Good
TR05: 2SA899 - Bad
TR07: 2SC1904 - Bad

Board F2721:
TR12: 23D382 - Good
TR13: 2SB537 - Bad
TR09: 2SC945 - Bad
TR06: 2SC945 - Bad
TR01: 2SC1400 - Good
TR02: 2SC1400 - Bad
TR03: 2SA750 - Bad
TR05: 2SA899 - Good
TR07: 2SC1904 - Bad

Tr701: 2SC2580 Bad not original (Sanken 2sc1403b)
Tr702: 2SC2580 Good not original (Toshiba 2sc3281)
Tr703: 2SA1105 Bad not original (Sanken 2sa745b)
Tr704: 2SA1105 Bad not original (Toshiba 2sa1305)

I want to supplement all the transistors since the majority of them this bad one. I was watching supplements but not as they are the best ones and where to buy them. They do not interpret to me bad, I do not want that they solve everything by my, if I do not request an advice. Of return I request excuses by my English
 
Reason why I was watching in different post offer different replacements
23D382 === MJE15030 ==== NTE291
2SB537 === MJE15031 ==== NTE153
2SC945 === 2SC1509S === 2SC2320 === NTE85
2SC1400 === KSC1845UBU === TX649B === NTE90
2SA750 === PN4249 === KSA992 === NTE234
2SA899 === KSA1220A === 2SB631 === MJE350 === 2SB649
2SC1904 === KSA2690A === 2SC2071 === NTE373


2SC2580 === ??? I could not find
2SA1105 ===??? I could not find

But I am not so specialistic to choose correct and better replacement for this amplifier. I request Its aid
 
I see that nobody wants to help to me. :cry:
The replacements who take are:

2sa1105---MJW21194G ----------- 4,35 ---- Mouser
2sc2580---MJW21193G ----------- 4,35 ---- Mouser
2sc1904---KSC2690AYS ---------- 0,38 ---- Mouser
2sa899----KSA1220AYSTSTU------ 0,37 ---- Mouser
2sc945----BC182B ---------------- 0,22 ---- Mouser
2sa750----KSA992FBU ------------ 0,06 ---- Mouser
2sb537----MJE15031G ------------ 1,36 ---- Mouser
2sd382----MJE15030G ------------ 1,36 ---- Mouser
2sc1400---KSC1845UBU ------ ---- 0,07 ---- Mouser

I hope that it is not bad election.....:scratch2:
 
I have called the major supply houses for parts replacement recommendations and this may be a way for you to go. Mouser.com and Digikey.com are the ones that get the most mention here and they have huge catalogs of parts. Maybe you would be able to contact them about supply and replacements for your amp. You should be able to do this on line.

Since these two companies handle some different brands, you may find two recommendations for the same obsolete transistor. This should not be a problem as if the electrical properties are the same the part should work.
 
Except for the first two listed, I have used all the other substitutions you have listed successfully.

Scott T.
 
alexmdq said:
Hello! Please respond me )))))
Click to expand...

Please understand our members are here to assist on their own free will, and a bit of patience and courtesy will go far in helping you get through your dilemma.
This is a great resource for everyone.
Casey
 
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