Manual Changes - HP 3456A Operating And Service Manual

) · 1 . INTROOUCTlON
7·2. This section of the manual has information to
adapt this manual for instruments with serial number
prefixes other than shown on the title page. In addition,
changes to instruments with the serial prefix given on
the title page may also be included in this section.
)·3. MANUAL CHANGES
7-4. To adapt this manual to your 3456A, refer to Table
7-1 and make aU the manual changes listed opposite
your instrument's serial number. Perform these changes
in the sequence listed.
7-5. I f your instrument serial number is not listed on
the title page of Ihis manual or in Table 7-1, it may be
documented in a yellow MANUAL CHANGES supple­
ment.
Table 7-1 Manual Changes
Inlrlmllll IUlll b lr
Sltri,1
and Below
2015A00260
and Below
201 5A00379
and Below
2015AOO529
and Below
2015AOO950
and Below
201SA0186S
201SA01866 thru 201 SA2905
and Below
201SA02160
and Below
201 SA02970
and Below
201 SA03070
2201A04596 thru 2201A4795
and Below
201 SA04595
MANUAL CHANGE INSTRUCTIONS
).6.
J.7. Changa #1
7-8. For serial numbers 2015AOO260 and below.
a. Page 8-83/8-84, Figure 8·70 (Schematic 9, Main
Controller Schematic), Delete inverters A4Ul6b and
as
UI6c, shown in Figure 7-1. Since part o f U l 6 is also
used in other circuits, only delete U l 6b and UI6c.
b . Page 6-7, Table 6-4 (Replaceable Parts). Change
A4UI8 from 1820-0693 to the following:
...
",.
.
A4U18 1820·1112
SECTION VII

MANUAL CHANGES

M,k, M.nllll Chi .... .
1
1.2
1,2,3
1,2,3,4
1,2,3,4,5
1,2,3,4,5,6
7
1,2,3,4,5,6,8
1,2,3,4,5,6,8,9
"
1,2,3,4,5,6,8,9,10,11
,
,
8 ICSN74LS74AN
7-9. Chang. #2
7-10. For serial numbers 2015AOO379 and below,
a. Page 8-71 /8-72, Figure 8-64 (Schematic 4, A/D
Converter Schematic). Resistors AlOR424 and R427
where origionally 56.2K ohms, and R425 and R426
where 44.2K ohms, They where changed to 52.3K ohms
and 47.5K ohms for R424 and R427, and R425 and
R426, respectively. They where changed to improve the
A/D Converter's Overload Circuitry operation when
the 3456A's is configured to the 50H2 power option. I f
the resistor values are other than shown o n schematic 4,
change them to the values shown on the schematic
(52.3K for R424 and R427, and 47.5K for R425 and
R426).
b. Page 6-1 1 , Table 6-4 (Replaceable Parts). The
values for A20R424 through R427 should be as shown
Table 6-4, if the 3456A is updated to those values.
t.
)·1 Chong. #3
7-12, For serial numbers 20l5AOO529 and below,
a. Page 8-79/8-80, Figure 8-68 (Schematic 7, AC
Converter Schematic). Change capacitors A4OC 17 and
CI8 from IOpF to 15pF.
b, Page 6-15, Table 6-4 (Replaceable Parts).
.
'.n
.. . .-
"'.
A4OC17,C18 0140·0202 2
c. Page 8-81 /8-82, Figure 8-69 (Schematic 8, Inguard
Logic Schematic). Change the following:
I , Delete A30U25a from the schematic, as shown
in Figure 7-2,
2, Connect a .0047f1F capacitor (A3OCI2) from
pin 1 of A30Ul1 to ground,
7-2.
d. Page 6-13/6-14, Table 6-4 (Replaceable Parts).
Delete A30U25 from the table and add the following:
A3OC12 0160-4298
CAPACITOR·FXO 15pF 500VDC
as
shown in Figure
8 CAPACITOR .OO47,.F
7-1
Rev
B