COMDYNA GP-6 - Page 24

OPERATOR'S
&
MAINTENANCE
MANUAL-----------------------------,,
page
A9
970-1
OVERLOAD
INDICATOR
A
lamp
driver
conducts
when
any
of
eight
amplifier
output
exceeds
a
preset
positive
or
negative
voltage.
With
negative
overrange,
01
shuts
off
and
02
conducts.
With
positive
overrange,
03
conducts,
pulling
02
on.
The
lamp
is
pulled
to
ground
or
on
when
06
conducts.
Resistor
R5,
capacitor
C1
and
transistor
04
provide
a
temporary
latch
so
that
momentary
overrange
may
be
overserved
with
the
lamp
alarm.
Adjustments
Adjustments
are
to
turn
the
lamp
alarm
on
at
an
approximate
10.5
volts,
0.5
volts
overrange.
Patch
to
be
+
10.5
volts.
Adjust
potentiometer
P2
until
the
lamp
indicator
is
on.
Invert
the
output
to
-10.5
volts.
Adjust
P1
until
the
lamp
tunrs
on.
Schematic
Assembly
Drawing
:>
.-.
CU
M
:r
It')
\D
r,.
a>
f
AMPLIF'IER
OUTPUTS
eaas
List
RB,
R9
..
4.7
K
R1
-
R4,
R6, R7,
R10
15
K
RS
..
27
K
P1,
P2
5
K
C1
6.8
ufd
C2
0.1
ufd
C3
0.01
ufd
01
-05
.2N4124
06
..
.MPSA13
Diodes
.1
N4148
Q.
E:
a:
...I
::>
s
+
-------------------------------------COM
DYNA,
INC.