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HP 3455A Operating And Service Manual page 228

Digital voltmeter
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I
COMR SlO€"
16
34se>g-«$9o
A
CKT
SIDE
8
A14
0345S-66514
Rev.
A
The
value of
R44
has
been changed
from
40
MO
to
2
MO
to prevent the zero-detect
compara-
tor
from
oscillating.
Instruments with
Serial
No's
1622A01056
and
greater
have
this
change
incorporated.
**6
Serial
numbers
1
622A05231
and
above
the
following
component
changes have been
made
to
improve
reliability
of
A1 0U1
5:
Old
Pert
No,
R1:
06B3-4335
(5.1 K1
R18:
0757-0435
(3-92
K1
R19:
0757-0421
(8261
R20:
0757-0442
(10
KJ
CR2:
1901-0040
CR6;
1901-0040

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