COMDYNA GP-6 - Page 26

OPERATOR'S
&
MAINTENANCE
MANUAL-----------------------------.
page
A13
905.4
DIGITAL
VOLTMETER
The
905
assembly
is
a
digital
voltmeter
that
functions
as
a
rationeter
of
input
voltage
signals
to
an
Input
voltage
reference.
For
analog
computer
applicaitons,
the
scale
1.000
reading
is
a
unity
ratio
of
a 1 O
volts
Input:
1 O
volts
reference.
All
active
circuitry
is
contained
within
the
intersll
7107
component.
For
a
description
of
the
circuit,
please
refer
to
I
ntersil
data
sheet
11-
77-008.
Adjustment
The
single
adjustment
should
be
made
so
that
the
display
shows
+
1.000
when
the
input
is
+
1 O
volts
reference.
Assembly
Drawina:
Schematic
Ucc
(')
:t'
~
u
R1
+lOV
IN
II")
u
1.
Gnd
2.
-15U
3.
nc:
If.
HGnd
5.
IN
6.
nc
7.
nc:
8.
+10U
9.
Ucc:
10.
nc
Parts
List
R7-9
RlO
R6
R2
Rl
R3
R4
R5
Pl
C4
180
4.7
47
47
49.9
100
100
1
10
100
K
K
K
K*
K
K*
M*
K
pfd
~
"I!'
C5
.01
ufd
R10
Cl,C6
.1
ufd
-10U
C3
.22
ufd
C2
.47
ufd
Zl
1N5231
Ql
2N4124
1
'+
DVM
ICL7107CPL
Dl
D2
D1
MAN6730
2
D2
MAN6710
* 1
% metal
film
resistor
Digital
Segments
N
-
units
N•
-
tens
N"
-
100
's
N'"
-
1000
's
COMDYNA,
INC.