Moog Source - Page 19

SOURCE DRUM INTERFACE UPDATE BULLETIN *1741
DIGITAL BOARD MODIFICATIONS
DELETE
ADD PART NUMBER COMMENTS
R2 470 OHM R2 IK OHM 852-317102-001 Update schematic
Cl .1 uf
Cl .01 uf 947-045183-103 Update schematic
Jumper at the
C2 location.
Step 1 - mount
and solder C2,
a 2.2 uf/25V
capacitor with
negative side
towards P37-3.
945-040209-014 Update schematic by
showing R89 from
ground to the
negative side of
C2 .
Step 2 - Mount a
100K, R89 from
right side of R2
to negative side
of C2.
852-312104-001
R3 22K Deletion only Not applicable Update schematic.
R63 100 Ohm R63 10K
852-312103-001
Update schematic
Cl 5 .Oluf CIS .luf
946-041978-J 04
Update schematic
R65 22K R65
Add 100K from
top of old R65
location to the
bottom of CR16
location (CR16
location is
not used).
852-312104-001 Update schematic by
showing R65 from •' ■ 5V
to U30 Pin 5.
R68 47K Ohm
R68 100K Ohm 852 - 312104-001
Update schematic
R67 750K Ohm R67 100K Ohm
852-312104-001 Update schematic
R66 47K Ohm R66 100K Ohm
852-312104-001 Update schematic
R69 4.7m Ohm R69 2M Ohm
852-312205-001 Update schematic
C16 220pf Cl6 470pf
947-045008-471
Update schematic
Not applicable Insulated white
wire jumper from
the top of R66 to
bottom of the old
R65 location.
987-040751-999 Update schematic by
shorting R64 to pin 6
of U30.
Not applicable CR20 and CR21-
Add two 1N4748A
diodes at P37
Pins 1 and 2.
919-041255-002 Solder two 22 volt
1 watt 5% zener diodes
to the traces coming
from Pins 1 and 2 of
P37 and join cathodes
together.
EPROM U23
Old version
EPROM U23
Version 3.2
991-045307-910 Return old EPROM
version to Moog for
recycling. Be sure to
return it in black
black velostat foam
provided.
K1 .5 amp
closure rating
K1 1 amp
closure rating
921-045141-002 Replace old relay with
one of larger current
rating.
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