HP 3455A - Page 236

components changed the
03455-66501
Assembly
from Rev,
A to
Rev.
C.
Ag
A1U57 has been
changed from
a
standard power TTL to a low power TTL device and
resistor
assemblies A2R17 and R18
changed from
2.2
kfl to 10 kfi to reduce the effects of switch
contact
resistance. This change has been made on
instruments with Serial
No's 1622A00906
and greater.
^
Resistor R69 and capacitor C44 have been added to
filter
out
pulses caused
by
switch
bounce
to eliminate "double
entries" In
the
MATH mode. Addition of these components change the
03455-66501 assembly from Rev. C to Rev. D. This
change has been made on instruments
with Serial No's 1622A01506
and greater.
A1 Componsnl Locitoc TiM*.
A2
03455-66502
Rev. A
Co'nooi'VRi Col CofTipcn«f>t Col Con>pon«(il Col CompoA«<it Col
Comooflort
Col Componont Col
ci.$ A CRI 6 J1 A
Q1-2
A R1-7 A U1 6
A
6*9
B 29 c 2 6-C 34 e 69 B
6-11
8
11
12 B
IM3
0 3 B 76 6
17-19
A 12 26 C
13-14
C
I4>16
6
4-6 D
9
e 21
26 B 2732 D
16 n
c
16 F
6
0-E 11
18 G 29. 3143 C
3348
t
iei9
0
J P 34
36 0
4963 f
21 0 B
P-C
36 c
64 71
C
22
0-6
9 G 3739 6
23 29 t
41-44
6
3143 E
46-49 P
3449
F 61
69
P
VI
p
4t
P 61«3 P
42
G JM1
P-G
6467 G
4344 P 2 F 66
C
46
CO 3 D
69
P
1 1
Li F SI A
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I
I
DODDDDODODDDOODDDDDODDDDDDDD
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