I can't remember if I used 1N4148 signal diodes as a sub for these in the past? Does anyone know for sure?
I couldn't find anything on it either but that's the name the AU-5500
service manual had for this diode? It's those green and black roundish blobs on vintage Sansui's.
service manual had for this diode? It's those green and black roundish blobs on vintage Sansui's.
Might get better attention of you put "green and black blob diode" in the thread title, as you can't be the first one to come across these. If there is a schematic it shouldn't be too hard to come up with a replacement part.
I've no idea without seeing a circuit and what they do. Just wondering whether they could be some form of double or triple diode or perhaps a Zener.
Now that my memory has been jogged I can remember replacing these DS-430 diodes with 1N4148 diodes in the Sansui AU-series amplifiers that I have rebuilt, if you look at an AU-11000 service manual you will see these diodes on the F-2580 driver board in the DC offset circuits. The Sansui AU-5500 I'm working on now has this DS-430 diode in the protection circuit and/or the turn-on delay circuit? I have already replaced the SV-02 diode with 2 x 1N4148 diodes, I suppose I was borked by having 3 x 1N4148 diodes in a row? But you are right Mooly, that's what it is, a triple diode! It doesn't cost anything to ask a question but it cost a lot sometimes (in magic smoke) if you don't ask, for fear of ridicule. Thanks, Mooly, your boundless knowledge on these things is always appreciated. Happy New Year and all that gear!
It does show as a silicon Zener
.5 to .8 drop at 1.5 ma so most applications 4148 switching diode is fine.
other cross reference substitutes show
BA216, BA314/315
.5 to .8 drop at 1.5 ma so most applications 4148 switching diode is fine.
other cross reference substitutes show
BA216, BA314/315
Found them. Yes, 4148's will be fine for those.
All that gear 😉 Hope everyone has a great Christmas and New Year
