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Model 492Aj494A
Section VI
Paragraphs 6-1 to 6-7
)
SECTION VI
REPLACEABLE PARTS
6-1. INTRODUCTION.
6-4. ORDERING INFORMATION.
6-2. This section contains information for ordering
replacement parts.
Table 6-1 lists parts in alpha-
numerical order of their reference designators and
indicates the description and
~
stock number of each
part, together with any applicable notes. Table 6-2
lists parts in alpha-numerical order of their
~
stock
numbers and provides the following information on
each part:
6-5. To order a replacement part, address order or
inquiry either to your authorized Hewlett-Packard
sales representative or to
CUSTOMER SERVICE
Hewlett-Packard Company
395 Page Mill Road
Palo Alto, California
a. Description of the part (see list of abbreviations
below).
b. Manufacturer of the part in a five-digit code;
see list of manufacturers in appendix.
c. Typical manufacturer's stock number.
d. Total quantity used in the instrument (TQ column).
e. Recommended spare part quantity for complete
maintenance during one year of isolated service
(RS column).
6-3. Miscellaneous parts not indexed in table 6-1 are
listed at the end of table 6-2.
or, in Western Europe, to
Hewlett-Packard S.A.
Rue du Vieux Billard
o. 1
Geneva, Switzerland.
6-6. Specify the following information for each part:
a. Model and complete serial number of instrument.
b. Hewlett-Packard stock number.
c. Circuit reference designator.
d. Description.
6-7. To order a part not listed in tables 6-1 and 6-2,
give a complete description of the part and include its
function and location.
A
B
C
CR
DL
DS
E
= assembly
= motor
= capacitor
= diode
= delay line
= device signaling (lamp)
=
misc electronic part
F
FL
J
K
L
M
= fuse
= filter
= jack
= relay
= inductor
= meter
REFERENCE DESIGNATORS
P
= plug
Q
=
transistor
R
= resistor
RT
= thermistor
S
= switch
T
= transformer
v
= vacuum tube, neon
bulb, photocell, etc.
W
= cable
X
= socket
XF
= fuseholder
XV
= tube socket
XDS = lampholder
~
= bandpass
bwo = backward wave
oscillator
c
= carbon
cer
= ceramic
cmo = cabinet mount only
coef = coefficient
com = common
comp = composition
conn = connection
crt
= cathode - ray tube
lin
=
linear taper
log
= logarithmic taper
m
= milli = 10- 3
M
= megohms
rna
= milliamperes
minat= miniature
mfg = metal film on
glass
mfr
= manufacturer
ABBREVIATIONS
mtg = mounting
my
= mylar
td
=
time delay
Ti0
2
= titanium dioxide
tog
= toggle
tol
= tolerance
trim = trimmer
twt
= traveling wave tube
var
= variable
wi
= with
W
= watts
ww
= wirewound
wlo = without
•
= optimum value
selected at factory,
average value
shown (part may
be omitted)
rot
= rotary
rms = root- mean- square
rmo = rack mount only
s- b
= slow - blow
Se
= selenium
sect = section( s)
Si
= silicon
sl
= slide
= normally closed
= neon
= normally open
= negative positive
zero-zero tem-
perature coeffic ient
= not separately
replaceable
nsr
obd
= order
by
de-
scription
p
= peak
pc
= printed circuit
board
pf
= picofarads =
10- 12 farads
pp
= peak- to- peak
piv
= peak inverse
voltage
pos
= position(s)
poly = polystyrene
pot
= potentiometer
rect = rectifier
NC
Ne
NO
NPO
elect = electrolytic
encap= encapsulated
impg = impregnated
incd = incandescent
ins
= insulation ( ed)
h
= henries
Hg
= mercury
Ge
= germanium
grd
= ground ( ed)
K
= kilo
f
= farads
fxd
=
fixed
= deposited
= detector
= Tubes and transistors
selected for best
performance will be
supplied if ordered
by
~
stock numbers;
tubes or transistors
meeting Electronic
Industries' Associa-
tion standards will
normally result in
instrument operating
within specifications
EIA
deli
det
co
,
....
0>
0-<
0-<
o
00144-2
6-1
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