hi,
some delay...... because so busy period.....
but finally back to the issue ......
as in the attached image ,
desoldered driver card and transistors "bar" too
now want to try to replace them with new ,
only need some help abpout the 2 "IC"...
that i do not know much about ,
and please any help about is so welcome,
as showed in the image on the transistors "front" there are the codes :
l
eft IC code : C4793 ,and as you can see on image also : °7G , in the low corner (is this part of the code ? )
digikey have 2 type : 2W , and 20W , they can be a right replacement ?
https://www.digikey.com/product-search/en?keywords=C4793
right IC code : A1837 ,and as you can see on image also : °7I , in the low corner (is this part of the code ? )
same here:
https://www.digikey.com/product-search/en/discrete-semiconductor-products/transistors-bipolar-bjt-single/1376376?k=A1837
thanks in advance for any help about !
ps
the tweetter drive card transistors do not have part code on the surface ,
....deleted with sandpaper.....
moamps said:
speaker same as before :-[ :'(
Unfortunately, my cards doesn't look as yours. IIRC there was few version of boards used in 1031 and higher.
You can check driver transistors as diodes using DMM.
Also, you can swap cards from twiter's amp and check if the bass amp works with twitter card to be sure that bass driver card is faulty. Did yo check output transistors?