Transistor Substitutions

And carefully look for something that has shorted. SOMETHING let a lot of current through there and took out your transistor. It is relatively uncommon for a transistor to fail like that. The 2SA726 is notorious for going noisy or failing, but not catastrophically shorting like that... at least not in my limited experience.

If you don't find the device that shorted, then you risk blowing the new replacement components.
 
Hi dlucy, you are right i need to change 2sc2360 too... its directly connected to 2sa1016 ... i found that MJ21194 is probably good substitution, or maybe mj21193g.:dunno::bye:
Which one is 2sa726 you mentioned in your last post? I couldn't find this one on the parts list...
 
Last edited:
ivo said:
Hi dlucy, you are right i need to change 2sc2360 too... its directly connected to 2sa1016 ... i found that MJ21194 is probably good substitution, or maybe mj21193g.:dunno::bye:
Which one is 2sa726 you mentioned in your last post? I couldn't find this one on the parts list...
Click to expand...

Sorry, ivo. The pos about the 726 wasn't in reply to you. That's one of the issues of mixing threads.

The complement to the KSA992 you'll be putting in is the KSC1845. This will be listed on the datasheet for the KSA992. Datasheets are your friend. There are lots of answers in them.

So, look at the KSC1845 datasheet and see if it is a good substitute for the 2SC2362 you've got to replace. KSA992 and KSC1845 are meant to go together.
 
Sory for the delay!! i wasn't home. My bad - its 2sc2362. Q102 and Q152.
So im going to replace Q104 and Q 154 which are 2sa1016 with ksa992 and Q102 , Q152 which are 2sc2362 with ksc1845. I'm I right?
Thanks!!
 
2SA1016 = KSA992 and 2SC2362 = KSC1845 in your case, yep.
 
Thanks, Doug! Sorry if I ask too much, but couldn't find sub for 2sa1210 and 2sc2912 they both are missing in the main list.
They are looking too bad in the board and the related caps are bad too...Ill take a look at the cross reference page too
 
Last edited:
ivo said:
Thanks, Doug! Sorry if I ask too much, but couldn't find sub for 2sa1210 and 2sc2912 they both are missing in the main list.
They are looking too bad in the board and the related caps are bad too...Ill take a look at the cross reference page too
Click to expand...


The datasheet is available here: https://datasheet.octopart.com/2SA1210-Sanyo-datasheet-101591.pdf

That is a high voltage, high-ish gain (hfe), 1w or more application. Without knowing the actual circuit needs, the best match I found was the MJE15034 and MJE15035 complementary pair.

Anyone have a better match for the 2SA1210 and 2SC2912 ?
 
Checked up ksa1142. Found some different digits. 2sa1210 Ic=140mA, Icp=200mA - ksa1142 Ic100mA (?)
2sa1210 Vcbo 200v ksa1142 Vcbo=180v(?)
Ivo.
 
That's right! Ill replace the existing drivers with ksa1142 and ill post the result here
 
Any idea on a substitute for 2SD655E? I can't find anything about it on AK :dunno:

It's used in the post amp / muting section of a Yamaha T-2 tuner (TR411 and TR412).

upload_2018-6-24_16-4-31.png
 
You must log in or register to reply here.

Similar threads

Bassblaster
Collaboration Transistor Substitutions Monster Thread!
2
Replies
31
Views
16K
eizner23
eizner23
dlucy
  • Sticky
Top Ten Worst Transistors - noisy, failure-prone, whatever... and replacements
20 21 22
Replies
420
Views
184K
jheu02
jheu02
dzkfraser
Transistor Help
Replies
5
Views
1K
Watthour
Watthour
TMaster
Sansui 7070 no bias voltage - transistors?
Replies
6
Views
894
Tom B
Tom B
JoshHendi
Refreshing an AU-20000... Help with transistor subs please
Replies
9
Views
2K
jFF_Bulbo
jFF_Bulbo
Back
Top Bottom