I have an old electronic organ from brand Yamaha, need to replace 2 pcs transistor; on body marked A672 2-E . Can't find alternative searching on the internet . I suspect it is a NPN type as I have between middle +pin and one side -pin 0.677VDC (on diode check) . The other outer pin gives 0V to middle ( ? suspect that is the broken circuit) .

 

Hello,

The A672 is most likely an 2SA672.
The 2S prefix often is not printed on the parts.
The 2SA672 is a PNP transistor.
There is a shortform datasheet with some replacements in the attached PDF.

Bertus

 

Thanks for the info. I got the BC560 but 2 unclear points :
1/ when checking by meter ( Diode check) current flow is opposite to original ,
2/ how to mount ? original A672 is square form, BC560 is has round off shape . So how to judge the pointing. On the board, between 2 holes, there is white dot . No idea what the dot refers to .

 

Hello,

I have attached the pages from my transistor book, with the pins.
You can see that the BC560 has the base in the middle and the 2SC672 the base on one side.
The shades on the pages are due to the reduction of colors.

Bertus