Ramsey Electronics FX-440 Manual page 109

[ ] [ ] G11. Install C90, 2.2 uf electrolytic.
[ ] [ ] G12. Install C92, 2.2 uf electrolytic.
[ ] [ ] G13. Insert U7, type 74HC283 IC with its notched end correctly
oriented. Solder the 4 outermost pins. •
[ ] [ ] G14. Insert and solder US as in step G13.
[ ] [ ] G15. Insert and solder U9 as in step G13.
[ ] [ ] G16. Insert and solder U10 as in step G13.
Soldering the remaining pins for U7, US, U9 and U10 may be done either
as a single operation or at any other pace preferred by you to ensure,
careful work (no missed pins, no solder bridges). As you complete the
soldering of each IC, mark its respective assembly step:
[ l [ l
G17 14 pins soldered on U7.
I I I I G18. 14 pins soldered on US.
[ l [ l
G19. 14 pins soldered on U9.
I I I l G20. 14 pins soldered on U10.
Install the following resistors and capacitors:
I I I I G21: R55, upright, 1 OK (brown-black-orange).
[ l [ l
G22: R44, upright, 22K (red-red-orange).
I I I l G23: R53, upright, 22K (red-red-orange).
[ l [ l
G24: C69, .01 uf (marked .01 or 103 or 1 Ont).
[ l [ l
G25: C6S, .01 uf.
I I I I G26. C91, .01 uf.
[ l [ l
G27. C98, .01 uf.
I l I I
G2S: R43, upright, 1 OK (brown-black-orange).
[ l [ l
G29: R52, also 1
OK
[ l [ l
G30: R103, upright, 47K (yellow-violet-orange).
I I I I G31: R104, upright, 1
OK
[ l [ l
G32: R90, upright, 1
OK
. I l I I
G33: R47, upright, 1
OK
FX-440 Assm. 49