Dmitry; There are schematics, and parts listed on them in the STICKY "Most Common Fisher PARTS needed". Page 2, POST #39.
http://audiokarma.org/forums/index....needed-for-fishers.327561/page-2#post-6364459
All resistors are 1/4w. and the caps for these are no more than 50V.
On the IBAM you'll see two demarcations "existing parts" . The parts between the two demarcations are the parts you need.
On the IBBA board (Yellow paper) jpg. Dave has written down all values. Pots for both are bourns 3386 types. Link here...
http://www.mouser.com/ProductDetail/Bourns/3386P-DF6-103LF/?qs=sGAEpiMZZMukHu%2bjC5l7YewRvTbBNT1xiERk5N2DVYQ=
http://audiokarma.org/forums/index....needed-for-fishers.327561/page-2#post-6364459
All resistors are 1/4w. and the caps for these are no more than 50V.
On the IBAM you'll see two demarcations "existing parts" . The parts between the two demarcations are the parts you need.
On the IBBA board (Yellow paper) jpg. Dave has written down all values. Pots for both are bourns 3386 types. Link here...
http://www.mouser.com/ProductDetail/Bourns/3386P-DF6-103LF/?qs=sGAEpiMZZMukHu%2bjC5l7YewRvTbBNT1xiERk5N2DVYQ=