HP 428B, Operating And Service Manual, Page: 30 / 52

Model 428B
23
SECTION VI
REPLACEABLE PARTS
6-1. INTRODUCTION.
6-2. This section contains information for ordering
replacement parts. Table 6-1 lists parts in alphabetic
order of their reference designators and indicates the
description, -hp- part number of each part, together with
any applicable notes, and provides the following:
a. The TQ column lists the total quantity of any
part listed in the manual. The total quantity of
a part is given the first time the part number
appears.
b. Description of the part. (See list of
abbreviations below.)
c. Typical manufacturer of the part in a
five-digit code. (See Appendix B for list of
manufacturers.)
d. Manufacturer's part number
6-3. Miscellaneous parts are listed at the end of
Table 6-1.
6-4. ORDERING INFORMATION.
6-5. To obtain replacement parts, address
order or inquiry to your local Hewlett-Packard Field
Office. (See Appendix C for list of office locations.)
Identify
parts by their Hewlett-Packard part
numbers. Include instrument model and serial
numbers.
6-6. NON-LISTED PARTS.
6-7. To obtain a part that is not listed, include:
a. Instrument model number.
b. Instrument serial number.
c. Description of the part.
d. Function and location of the part.
ABBREVIATIONS
Ag silver ID inside diameter ns nanosecond(s) = 10
-9
seconds SPDT single-pole double-throw
AI aluminum impg impregnated nsr not separately replaceable SPST single-pole single- throw
A ampere(s) incd .incandescent
Ω
ohm(s) Ta tantalum
Au gold Ins .insulation(ed) obd order by description Te temperature coefficient
C capacitor k
Ω
kilohm(s) 10
+3
ohms OD outside diameter Ti02 titanium dioxide
cer ceramic kHz kilohertz= 10
+3
hertz P peak tog toggle
coef coefficient L inductor pA picoampere(s) tol tolerance
com common lin linear taper pc printed circuit trim trimmer
comp composition log logarithmic taper pF picofarad(s) 10
-12
TSTR transistor
conn connection mA milliampere(s) = 10
-3
amperes farads V volt(s)
dep deposited MHz megahertz = 10
+6
hertz piv peak inverse voltage vacw alternating current
DPDT double-pole double-throw M
Ω
megohm(s) = 10
+6
ohms p/o part of working voltage
DPST double-pole single-throw metflm metalfilm pos position(s) var variable
elect electrolytic mfr manufacturer poly polystyrene vdcw DC working voltage
encap encapsulated ms millisecond pot potiometer W watt(s)
F farad(s) mtg mounting p-p peak-to-peak wi with
FET field effect transistor mV millivolt(s)= 10
-3
volts ppm parts per million wiv working inverse voltage
fxd fixed µF microfarad(s) prec w/o without
GaAs gallium arsenide µs microsecond(s) ww wirewound
GHz Gigahertz=10
+9
hertz µV microvolt(s) = 10
-6
volts
precision (temperature coefficient,
long term stability, and/or
tolerance) *
gd guard(ed) my Mylar® R resistor
Ge germanium nA nanoampere(s) = 10
-9
amps Rh rhodium
optimum value selected at
factory, avg value shown
(part may be omitted)
grd ground(ed) NC normally closed rms root-Olean-square **
H henry(ies) Ne neon rot rotary
Hg mercury NO normally open Se selenium
no standard type number
assigned (selected or
special type
Hz hertz (cyc1e(s) per second) NPO negative positive zero sect section(s)
(zero temperature coefficient) Si Silicon
sl slide
DECIMAL MULTIPLIERS
Prefix Symbols Multiplier Prefix Symbols Multiplier
tera T 10
+12
centi c 10
-2
giga G 10
+9
milli m 10
-3
mega M or Meg 10
+6
micro µ 10
-6
kilo K or k 10
+3
nano n 10
-9
hecto h 10
+2
Pico p 10
-12
deca da 10 femto f 10
-15
deci d 10
-1
atto a 10
-18
DESIGNATORS
A assembly FL filter Q transistor TS terminal strip
B motor HR heater OCR transistor- diode V vacuum tube, neon bulb,
BT battery IC integrated circuit R resistor photocell, etc.
C capacitor J jack RT thermistor W cable
CR diode K relay S switch X socket
DL delay line L inductor T transformer XDS lamp holder
DS lamp M meter TB terminal board XF fuse holder
E misc. electronic part MP mechanical part TC thermocouple Y crystal
F fuse P plug TP test point Z network