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HP 437B Service Manual

HP 437B
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HP
437B
8-8
SERVICE
Table
8-2.
Schematic
Diagram
Notes
(3
of
8)
SCHEMATIC
DIAGRAM
NOTES
Indicates
multiple
paths
represented
by
only
one
line.
Letters
or
names
identify
individual
paths.
Numbers
indicate
number
of
paths
represented
by
the
line.
Coaxial
or
shielded
cable.
Relay.
Contact
moves
in
direction
of
arrow
when
energized.
Indicates
a
pushbutton
switch
with
a
momentary
(ON)
position.
Indicates
a
PIN
diode.
Indicates
a
current
regulation
diode.
Indicates
a
voltage
regulation
diode.
Indicates
a
Schottky
(hot-carrier)
diode.
Multiple
transistors
in
a
single
package—physical
location
of
the
pins
is
shown
in
package
outline
on
schematic.
Identification
of
logic
families
as
shown
(in
this
case,
ECL).
Indicates
an
opto-isolator
of
a
LED
and
a
photoresistor
packaged
together.
The
resistance
of
the
photoresistor
is
a
function
of
the
current
flowing
through
the
LED.

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HP 437B Specifications

General IconGeneral
BrandHP
Model437B
CategoryMeasuring Instruments
LanguageEnglish

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