Table of Contents
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Service
Model
1331A
Table
8-1.
Schematic Notes
Refer
to MI
L-STD-15-1 A for schematic symbols not
listed in
this
table.
I.
[_~=~
Etched circuit board
17.
Main
signal path
18
.
Primary feedback
path
r -
--,
2.
Assembly
L
_
_J
19
.
Secondary feedback path
3
.
1
c-l1
Etched circuit board
20
~
Test point
L.::
_:-_:_J
on assembly
21.
~:
Field-effect transistor
Front-panel marking
(N -type base)
4
.
~----,
22
.
Cf)
Breakdown diode
5
.
I
I
Rear-panel Marking
(voltage regulator)
L
---~
6 .
.
0---
Front-panel control
23
.
El >
Tunnel diode
-:,
7.
Screwdriver adjustment
24.
®
Step-recovery diode
8.
P/0
Part of
Clockwise end of vari-
I
Circuits or components drawn
9
.
CW
·~
able
resistor
,.
with dashed
lines
(phantom)
show
25.
_,,.
function only
and are
not
intended
fr'
10.
NC
No
connection
--
I
to be
complete.
The circuit
or
'-~
I
component is
shown
in detail on
II.
~
Waveform test
point
--~
another
schematic.
(with
number)
26
.
(925)
Wire colors are given by
--L_
numbers
in
parentheses
12.
Clamp type connector
using the resistor color code
[
(925) is wht-red-grn
]
L~>-
0- black
5 - Green
13
.
Single-pin connector on board
1
-
Brown
6 - Blue
2- Red
7
-
Violet
3 - Orange
8
-
Gray
4 - Yellow
9
-
White
[--,
Pin of a plug-in board
14.
__
J
>-
(with letter or number)
27.
*
Optimum value selected
at factory, typical
15
lJ~
value shown; part may
Coaxial cable connected
have been omitted.
directly to board
Unless otherwise indicated:
28
.
resistance in ohms
16
.
[ - 4 -
Wire connected to pressure-fit
capacitance in picofarads
.
socket on board
inductance in microhenries
8-6
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