Found out my 790 has bad OPAMPS (TA7136)x2 in the Tone Control Section. The TA 7136 is basically NLA as far as I can find. ANYWAY. I did find this interesting thread on DIYAUDIO, but it's really vague on how to do it. You replace the Single inline 7pin TA7136 with Dual inline 8 pin OPA604 or OPA2604. http://www.diyaudio.com/forums/parts/46179-replacement-ta7136p.html
My problem is I don't have the vaguest idea how to do this.
1.) Do I need a 2604 for each side(R&L) or just one?
2.) I know I'll need to socket this in and wire it in, but don't know how to figure out pinouts. (if it has more than 2 pins (+&-)) I'm lost!
3.) Which of the OPA 604 and 2604 would be a better match for the 7136?
If someone would be so kind as to look at the .pdf's attached, and match the pins for me I'd be very greatful. The TA7136.pdf is here: http://www.audiokarma.org/forums/attachment.php?attachmentid=245924&d=1292876900http://www.audiokarma.org/forums/attachment.php?attachmentid=245924&d=1292876900
Once I have the pinouts, I can make up the sockets and solder them in and install the chips. I just don't know how to figure out the electronic shorthand.
Thanks
Larry
My problem is I don't have the vaguest idea how to do this.
1.) Do I need a 2604 for each side(R&L) or just one?
2.) I know I'll need to socket this in and wire it in, but don't know how to figure out pinouts. (if it has more than 2 pins (+&-)) I'm lost!
3.) Which of the OPA 604 and 2604 would be a better match for the 7136?
If someone would be so kind as to look at the .pdf's attached, and match the pins for me I'd be very greatful. The TA7136.pdf is here: http://www.audiokarma.org/forums/attachment.php?attachmentid=245924&d=1292876900http://www.audiokarma.org/forums/attachment.php?attachmentid=245924&d=1292876900
Once I have the pinouts, I can make up the sockets and solder them in and install the chips. I just don't know how to figure out the electronic shorthand.
Thanks
Larry
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