OPERATOR'S
&
MAINTENANCE
MANUAL------------------------------.
7913.1
REGULATOR
The
7913
assembly
rectifies/filters
from
the
28
VCT
secondary
to produce
an
unregulated
+
UN
and
-UN
outputs,
which
are
also
regulated
as
plus/minus
15
volts,
precision
plus/minus
10
volts
reference
and
Vee
(plus
5
volts.)
Positive
refernce
is
produced
by
ua723
regulator
14.
Negative
reference
is
inverted
positive
reference.
Lamp
L 1
offers
negative
reference
output protection.
Reference
Adjustments
1.
Adjust potentiometer
Pl
until the positive reference equals
+
10.000 volts.
2.
Adjust potentiometer P2 until negative reference equals the inverted positive
refernce.
Schematic
+UN
.---------~----------
+151,J
1'fUAC
PGnd
----------.
1'fUAC
Aaaembly
Drawing
eaaa
Lisi
R6
10
ohm
R2
2.32
K#*
R3
2.43
K#
R5,R7
4.99
K#
C2
i
C3\~
Pl
R1
6.04
K#
P2
R4
9.76
K#
L1
..
12V
.04A
INC
P1,P2
50
ohm
C1,C2,C3
2200
ufd
elec
C4
.1
ufd
cer
cs
1
ufd
tant
C6
100
pfd
cer
...;ruM;l{)\Or°'-00(1\o_;NM;U,
...i
.....
....i
.........
-4
CB
.01
ufd
cer
D1
-
D8
1
N4001
01
2N4124
02
2N4403
11
ua7815
12
ua7915
13
ua7805
14
ua723
15
Mc1741CG
NOTES:
#metal
film resistor
*value may be altered
Rectifier diodes
01
•
D4
may be
2N5401
for high current applications.
page
A3
---------------------------------------COM
DYNA,
INC.
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