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MANUAL 'cHANGES
. DC POWER SUPPLY
Model 6448B
Manuol HP Part No,· 06448-9000I
,,1·
'Malte all corrections In the manual according to errata.below, 'then chec)c the following table Co~ your power
'
supply serial number and enter any ·uste~ change(s) In t_he manual.
.
SERIAL
MAKE
Prefix
Number
CHANGES' '
'.
'
I
1
Enera
All
-
i
19E
0402,0561
'
,I
9E
' 0562,0641
1
1,2
I
OH
0642-0670,
1.2.3
OH.
067l-07Sl
1 lhru 4
'
..
OH
07S2-0791
l
lhru
5
OH
0792,0811
1.2,3.4.6
1139A
0812-1741
I linu8
1624A
.
1742,1816
'
11hru 9
1644A
1817,1864
I thn1 ')'
1712A
186S.2116
I
thru
ll
'
182SA
!
2092,2166
l lhru 12
•
'·
1836A
21b7,221b
I
llhru 13
.. · 1844A'
' 2217-2HOI
l lhru )4
203/!A
j
2802-2%1
'!
l 1hru
J.):
2ll7A
, 2952,1,.p
l thru· lb
-
.,
..
·,
!:RRATA
On Figure 3-8, removeJhe strap·between (-) and
L
(-S) on all SIAVE suppl!es. Add a strap between
' (AS)
and (-S) on all SIAVE supplies.
On page 4-4, paragraph 4-30, chan:;e \.he fourth
sentence to read as follows:
For example, dur~rlg constant voltO:gc operati~n ·
the collector voltage of Ql (voltage Input) ,for-
ward biases _CR7 (CRB reversed biased by QB),:.' .
th~ current through CR7 will vary as. Ql collec-
tor voltage varies· and thus vary 04 base cur-
rent:
thCre!ore, the collector current of Q4
is
· controlled by the vpltage Input.
On page 2-1,, delete paragraphs 2-19, 2-20 and ·
2-21 elnce they are not applicable to this suppl\·,
In epeclflcatlons iable and all other places where
output ts mentioned, change it
to
~ad:
l-600 Volts.
'
Add the following note to u.~ specification table
(1-1) and Paragraph 2-14: "The minimum ac power
lir.e protection capacity required for SCk firing
surges ts
20
amperes when operated from
a
US.volt
t'tne, and 10 amperes when 'opernted from·
il
230 v,.Jtt
llne."
·
'
On
the schematic, change ,the,:reference designator
.-md
value
of
the current samplln'g reS'1stcr from
RSj
, R23, ln, SW. ,,'
.
'
.
'Iu th ... , ...
pl"certble parts t.lble, udd: ' .
~
Lcc:kwasher, Internal tooth, 29/64 ID. x 27/32 OD'
x. 062 thick, Shakeproof 1422-00 (for, R2).
'
'
On thE? schcmBtic diagram, reverse' th~
Polarity
o_f
diodes CR39 and CR43, Ch~nge the voltage at
Test Point 51 Crom -J0V to -25,6V. In addition,
everywhere else in the schematic where .. _30V"
•appears. change
it
to "-25~6V/'
'
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CHANGE: 1
In replaceable parts table make the following
changes:
. . CR17, 18: Change to 38639,
~
Part No. 1884-
0058,
'
.
R21: Change to l00n :5% 2W, A.B.,
i} Part No.
0698-3620.
,
,
Motor, Fan: Change to
'Ii
Part No. 3140-0052,
CHANGE 2:
In the replaceable parts· table and on the·s'chematic
dlagri'.lrn.,, make the fo'\ow1ng changes:
,, Rl7:
Change from selected value to
200k.n. :!:5%,
½
W, HP Part No.· 0686-2045.
Handles: Change HP Part No, to 5020"5;!5,
qty, 2,
I
Machine Screw, handles: Add,
HP
·rart No.
2680-0173( qty. 4.
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\. , CHANGE 3:
.
.
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The serial number prefix of the instrument ha.s·beer.
cha.nged from "9[" to
11
0H."
,;
In the replaceable parts table, make the following
~
change:
,
1
•
L2, Line Choke: Change the HP Part No, to . '
5080-7151.
.
CHANGt 4:
In the replaceable
pans
table, make the
f,:,llow1ng
changes:
1
'
•
,
,,
'
· R44: Cliange to "Selected !or optimum periorm-
ance," nominai'
v·alue ls
300"• ±5~~.
! \\'.
OPTION 17/18: .
1
R21: Change to 220,.., 5%, ZW, HP rart'Xo,
0698-3628.
Cl2: Add Cl2. 0,047,J": 600V, HP Pan 1:o.
0IG0-0005.
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