Date Codes - HP 7475A Service Manual

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Section V
Model 7475A
c.
Assembly Date Code. The date code on the PCA is a four-digit number which identifies the assembly level.
The first two digits represent the last two digits of the current year and are derived by subtracting 60 from the
current year; the last two digits are the number of the week in that year, i.e. 2314
=
fourteenth week in 1983. Any
digits following a hyphen in the date code represent the division that manufactured the assembly.
5-9.
Table 5-3 is a quick-reference table that lists PCAs by part number and date code. Listed next to the part number
and date code of the PCAs are the Items located in this section that describe the differences between the PCA in
question and the level of that PCA described in the main body of this manual.
Table 5-3. Date Codes
PCA
DATE CODE
ITEM
Al (07475-60101)
2314-11
1
Al (07475-60102)
2314-11
2
Al (07475-60101)
2420-11
3
Al (07475-60102)
2420-11
4
ITEM 1
Date code 2314-11 is the date code on the original PCA installed in the plotter at the time of product introduction. Except
for the following part numbers, PCAs having a date code of 2314-11 have the same components as those listed in
Section IV.
REFERENCE
DESIGNATOR
AlDSl-2
AlDS3
AlE4
AlE8
AlEll-16
A1El8-20
AlH3-6
AlH9-12
AlJ4
MAIN PCA, RS-232-C, OPTION 001
PART
NUMBER
1990-0485
1990-0487
1200-0567
1200-0654
2110-0597
07 4 70-40038
0515-0055
0535-0031
1251-4946
ITEM2
DESCRIPTION
LED
LED
SOCKET
SOCKET
FUSEHOLDER
SPACER
SCREW
NUT
CONNECTOR
CHECK
DIGIT
5
7
1
7
7
6
8
2
5
Date code 2314-11 is the date code on the original PCA installed in the plotter at the time of product introduction. Except
for the following part numbers, PCAs having a date code of 2314-11 have the same components as those listed in
Section IV.
5-2
REFERENCE
DESIGNATOR
AlDSl-2
AlDS3
A1E3
AlE6
A1El4-19
AlE21-23
AlH3-6
AlH9-12
MAIN PCA, HP-IB, OPTION 002
PART
NUMBER
1990-0485
1990-0487
1200-0567.
1200-0654
2110-0597
0747040038
0515-0055
0535-0031
DESCRIPTION
LED
LED
SOCKET
SOCKET
FUSEHOLDER
SPACER
SCREW
NUT
CHECK
DIGIT
5
7
1
7
7
6
8
2

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