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Model 1821A
Section
VI
Paragraphs
6-1
to
6-7
SECTION
VI
REPLACEABLE PARTS
6-1.
INTRODUCTION.
6-2.
This section contains information
for
ordering
replaceable parts for
the
instrument.
Table 6-2
lists
the
parts
in
alpha-numerical order
of
their
reference
deisgnations
and provides
the following
information
for
each
item;
a.
hp Part
Number.
b.
Total
quantity
(TQ)
used
in
instrument; given
only
first
time a part
number
is
listed.
c.
Description
of
part;
see Table
6-1 for
list
of
reference designators and
abbreviations.
6-3.
Parts
not identified
by a reference designation
are
listed at the
end
of
Table
6-2,
under
Miscellaneous,
6-4.
ORDERING INFORMATION.
6-5.
To
order replacement
parts
from
the
Hewlett-
Packard Company,
address
the
order or
inquiry
to
the
nearest
Hewlett-Packard
Sales/Service
Office
(list
at
the
rear
of
manual) and supply
the
following
information:
a.
hp Part
Number
of
item(s).
b.
Model number
and
eight-digit
number
of
the
instrument.
c.
Quantity
of
parts desired.
6-6.
To
order a
part not
listed in the table,
provide
the following information:
a.
Model
number
and
eight-digit
serial
number
of
instrument.
b.
Description
of
part including function
and
location.
6-7.
Component
descriptions given
in
Table
6-2 are
as
complete as
possible
to
assist
in
obtaining replace-
ment
parts
from
manufacturers
other than
hp.
How-
ever,
many
parts
are manufactured
only
by
hp,
or are
produced
by other manufacturers
to
hp proprietary
specifications,
and are
therefore available only
from
hp.
Actual
manufacturer and manufacturers
part
number
for
non-hp
parts
will
be supplied
upon
re-
quest.
Contact
the
nearest hp Sales/Service
Office.
Table
6-1.
Reference Designators and Abbreviations
A
=
assembly
B
-
motor
C
=
capacitor
CP
=
coupling
CR
=
diode
DL
=
delay
line
DS
=
device signaling (lamp)
E
=
misc
electronic part
A
amperes
AMPL
amplifier
BP
=
bandpass
CAR
carbon
CCW
=
counterclockwise
CER
=
ceramic
COEF
=
coefficient
COM
=
common
COMP
composition
CONN
=
connector
CRT
cathode- ray
tube
CW
clockwise
DEPC
deposited
carbon
ELECT
electrolytic
ENCAP
=
encapsulated
EXT
external
F
=
farads
FET
=
field effect
transistor
FXD
fixed
GE
-
germanium
REFERENCE
DESIGNATORS
F
fuse
MP
=
mechanical
part
TP
test
point
FL
filter
P
plug
V
=
vacuum
tube,
neon
J
jack
Q
=
transistor
bulb,
photocell,
etc
K
relay
R
=
resistor
VR
=
voltage regulator
L
=
inductor
RT
=
thermistor
(diode)
LS
=
speaker
S
switch
W
=
cable
M
meter
T
=
transformer
X
socket
MC
mic
rocircuit
TB
=
terminal
board
Y
=
crystal
ABBREVIATIONS
GL
glass
MTG
mounting
RF
_
radio
frequency
GRD
ground(ed)
MY
=
''mylar"
_
q
S-B
slow- blow
H
henries
N
=
nano
(10
)
SCR
=
screw
HG
mercury
N/C
=
normally closed
SE
=
selenium
HR
hour(s)
NE
=
neon
SECT
=
section(s)
hp
Hewlett-Packard
N/0
=
normally open
SEMICON-
semiconductor
NPO
=
negative positive
zero
SI
silicon
IF
intermediate
freq.
(zero
temperature
SIL
silver
IMPG
impregnated
coeffic
ient)
SL
=
slide
INCD
incandescent
NSR
=
not
separately
SPL
=
special
INCL
include(s)
replaceable
INS
insulation(ed)
TA
=
tantalum
INT
internal
OBD
=
order
by description
TD
time
delay
OX
=
oxide
TGL
r
toggle
K
o
o
o
o
TI
titanium
PC
-
printed circuit
TOL
=
tolerance
LIN
linear taper
PF
=
picofarads
=
TRIM
trimmer
LOG
logarithmic taper
10
farads
LPF
low
pass
filter
PIV
--
peak
inverse
voltage
/-i
,
„-6
micro
=
10
-3
P'O
=
part
of
M
milli
-
10
POLY
=
polystyrene
VAR
=
variable
MEG
meg
-
10^
PORC
porcelain
VDCW
=
dc
working
volts
METFLM
=
metal
film
POS
position(s)
MET
OX
=
metal
oxide
POT
potentiometer
w
with
MFR
manufacture
r
PK-PK
pcak-to-peak
w
watts
MINAT
miniature
ww
=
wirewound
MOM
momentary
RECT
=
rectifier
W/Q
=
without
02591-3
6-1
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