BFGoodrich PS-823 - Page 65

BFGoodrich Avionics
Systems,
Inc.
Component
Maintenance
Manual
P/N
501-1075-()
PS-823C,
D,
G,
and
H
Notes:
PS-823CM,
DM,Gif,
and
Hit
Notes:
Description
ofNotationorModification
I
1 Unless
otherwise
specified, all resistors are
in
Ohms (±5%), 1/4W.
All capacitors
are in
microfarads
(µF),
±20%.
All
diodes are 1N2069.
2 2
Select
the
value
of
R24
(nominal
value:
1.0Meg)
and Rl (nominal
value:
130K).
3
AlB2
used
on
101-1075-08
may also
be alternate for
A1Bl.
When
using A1B2
on
101-1075-07,
disconnect R32
from
point 16
for pre 1976 configurations
or from
TB-1
for aûer
1976.
When
using
AlBl on
101-1075-07,
disconnect R35 from
point
17 or TB2.
See Figure
l19 A
and B.
3
AlB2 used on
101-1075-04
may also
be alternate for
AlB l. When
using Al
B2 on 10
1-1075-01,
disconnect R32
from
point
16
for pre 1976
configurations
or from
TB-1
for aûer
1976.
When
using
AlBl
on
101-1075-01, disconnect
R35 from
point
17 or TB2.
See Figure
l19 A
and B.
4
N/A
5
N/A
6
N/A
7 4 Mod 2
added
Cl9.
5
Mod 3
added
CR7.
8 6
Mod 20
added C17 and C18.
9 [7]
Mod 3 [7]
added
chassis ground.
10
[8]
Mod
4
[5]
removed Q9,and Mod 6 [8]
added washer.
11 [9]
Mod
5 [6] changed R19, R20, R21,
R22.
12 10
Mod
8
(PS-823C),
Mod
7
(PS-823D),
Mod 10
(PS-823C/T),
and Mod
9
(PS-823D/T)
relocated
AlF2 and added
CR23
and C20.
13
11
Mod
9
(PS-823C),
Mod 8
(PS-823D),
Mod 11
(PS-823C/T),
and Mod
10
(PS-823D/T)
changed
value
of
R7 to
27K.
14
12
Mod
10
(PS-823C),
Mod
9
(PS-823D),
Mod 11
(PS-823C/T),
and Mod
10
(PS-823DET)
removed
Cl7
and
changed Cll
to 0.lµF/500V.
15 13
Mod ll
(PS-823C),
Mod 10
(PS-823D),
Mod
13
(PS-823C/T),
and
Mod 12
(PS-823D/T)
removed
Cl2,
added
L3,
and changed
the
values
of
C18 to 0.lµF/200Vand
R37to
390.0.
16
14 Electrically
relocated R31,
January
1976.
17
15
Mod 12
(PS-823C),
Mod ll
(PS-823D),
Mod 14
(PS-823C/T),
and Mod
13
(PS-823D/T)
physically
relocated C18.
18
16
Mod
13
(PS-823C),
Mod 12
(PS-823D),
Mod 15
(PS-823C/T),
and Mod
14
(PS-823D/T)
added
wire between
Jl-8
and
A2-l
l.
19
17 Mod 14
(PS-823C),
Mod 13
(PS-823D),
Mod 16
(PS-823C/T),
and
Mod 15
(PS-823D/T)
added
wire between
Jl-9
and
Fl/Ll.
20
18
Mod
15
(PS-823C),
Mod 14
(PS-823D),
Mod 17
(PS-823C/T),
and Mod 16
(PS-823D/T)
added
diode
assembly,
removed
Q19,
and
electrically
repositioned
Ql8
and Q20. See,also,
Figur 119A
and B.
21
19
Mod 16and
17
(PS-823C),
Mod 15
and
16
(PS-823D),
Mod
18 and 19
(PS-823C/T),
and Mod
17
and 18
(PS-823D/T)
removed
A2C16 and
added A2C21.
Schematic
Diagram Notes
Figure
129
msmijtp202TestFaultlso2diskl59
24-20-03
Page
163
Revision A
June 30, 1999