Basic Component Symbology - HP 8340A Service Manual

Resistance is in ohms,
R, L, C
inductance is in micro-
henries, capacitance is
in microfarads, unless
otherwise noted.
Part of.
P/O
Indicates a factory sel-
*
ected component.
0-
Panel Control.
�
Screwdriver adjustment.
Encloses front panel
c=i
designation.
Encloses rear panel
designation.
._ __ - ..
Circuit assembly border-
----
line.
Other assembly border-
------
line.
Heavy line with arrows
indicates path and dir-
ection of main signal.
Indicates path and dir-
ecti on of main feed-
--·-
back.
*
Earth ground symbol.
Assembly ground. May
9
be accompanied by a
number or letter to spec-
ify a particular ground.
,;,
Chassis ground.
Represents n number
--4-
of transmission paths.
l Test Point: Terminal
provided for test probe.
CD
Constant Current
Source
Model 8340A - Service

BASIC COMPONENT SYMBOLOGY

Pin Edge Connector
=::: ::r-
output of PC board.
Indicates wire or cable
color code. Color code
same as resistor color
code. First number
�
indicates base color,
second and third
numbers indicate
colored stripes.
Indicates shielding con-
0
ductor for cal:iles.
Indicates a plug-in
-< �
connection.
Indicates a soldered or
-0--
mechanical connection.
Connection symbol in-
�
dicating a male con-
nection.
Connection symbol in-
--<
dicating a female con-
nection.
Resistor.
-¥l'v-
@-
Resistor (Temperature
Se
Variable Resistor.
�
General purpose diode.
�
-®-
Step recovery diode.
--®-
Schottky diode.
v
Breakdown Diode: Zener
�
--@
Light-Emitting Diode.
©
SCR (Silicon Controlled
Rectifier).
Ferrite
-0-
Figure BA-12. Schematic Diagram Notes (1of2)
Scans by HB9HCA and HB9FSX
©
®
�
()
()
-Jr-
t>
-<Y\.-0-
��
0
s e)
n iti
---a
v
0
-0-
0
8-
8
0
Bead
FET: Field Effect Tran-
sistor ( N-channel).
Field Effect Tran-
FET:
sistor-Guarded gate- (N
channel).
Dual Transistor.
Transistor NPN
Transistor PNP
+ Electrolytic Capacitor.
Toroid: Magnetic core
inductor.
Operational Amp! ifier.
Fuse
Pushbutton Switch.
Toggle Switch.
Thermal Switch.
Summing Point.
Oscillator;
RPG (Rotary Pulse
Generator).
Fan, Motor.
Toroidal Transformer
Feedthrough
8-59