Part Changes; Proprietary Parts - HP 3457A Service Manual

Replaceable Parts
6-1 1. PART CHANGES
6-12. Components which have been changed are so marked by one of three symbols; a delta (A), a delta
with a letter subscript
(A,)
or a delta with a numeric subscript (Alo). A delta with n o subscript indicates the
component listed is the preferred replacement f o r an earlier component. A delta with a letter subscript in-
dicates a change which is explained in a note at the bottom of the page.
A
delta with a numeric subscript
indicates the related change is discussed in backdating (Section V11). The number of the subscript indicates
the change number in the backdating section.
6-1 3. PROPRIETARY PARTS
6-14. Items marked by a dagger (T) in the reference designator
service of Hewlett-Packard instruments.
column are available only f o r repair and
Table 6-1. Standard Abbreviations
Ag
SIIYO~
H I
A1 .1ummum
hertz IcycIeIsI per second1 NPO negmve POIltlYB zero SI
lzero temperature coeft#c#entl SPDT
rllde
A ~ l m p e l e l ~ l ID inrlde dlameter nr
nanorecondlsl = I 0
-
9 seconds
SPST
stngls pole double throw
A u gold m p g impregnated nsr not separately replaceable
Ilngle pole rlngle throw
comp COmPO.lllOn
P
Con" COnneEflon L mductor PA
peak t r m
p~coamperelsl TSTR
tr,mme,
I," lhnear taper pc printed c ~ r c u ~ f
tranrtrtor
dSP deposited
DPDT double pole double throw
DPST double pole rmgle throw
F fmadlsl
FET fldld effect transls~or
fxd Isxed
A assembly
B motor
BT battery
C
Capacitor
CR diode or thyrlslor
DL delay 1,"s
DS lamp
E marc elsctronlc part
F furs
m A
m~llcampersls
-
1 0 - 3 amperes
M H z
megahertz .
1
o
+
6 hertz
MO
megohmlri
-
l o +
6 ohms
met llrn metal film
m l r manufacturer
m s m#llr%ec~nd
m t g m o u n m g
mV m ~ l l w o l t l r i
-
I 0 3volrr
PF m~crolaradlri
mmosecondlri
LV
m ~ s r o v o ~ t t s ~ = 1 0 - 6 volts
my Mylar
Q
nA nanoamperelrl = ' 0
9 amperes
NC normally closed
Ne
neon
NO normally open
PF plcofaradlsl 1 0 - 1 2 lareds
P*v peak lnverse voltage
Pi0 part o f
P o l p o ~ m o n l l i
polv polystyrme
PO! potentmmeter
P P peak
10
peak
w m
prec
p a m per m ~ l l ~ o n
p r m s m n Itempermure coelflcent
long term a t a b # l l t ~ andior folerancsi
R
Rh
,tl$IJtOl
rmr
rhodwm
root mean souare
1 0 1
rotary
FL fllter 0
HR h e OCR
tranllstor
IC megrated crcult Rlpl
transstor diode
J lack RT
~ e s l s t o r l p ~ ~ c k I
K relay S
therml.,~,
L mductor T
swlfch
M mscer TB
transformer
MP mschanlcel part TC
tsrmonal board
P plug TP
I h e r m ~ c ~ ~ p l e
test pomt
v
vacw
Voltill
cltemamg current worhrng voltage
var
vdcw
variable
d o r m current working voltage
optimum
value selected a t factory
svemge value shown lpart may be ommedl
no standard type number anslgned
1
>
lermlnel stnp
U m l c l o ~ l r ~ ~ l ,
V vacuum tube neon bulb photocell sfc
W
cable
X socket
XDS lampholder
XF fuseholder
Y Crystal
Z network