Table of Contents
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Model 3476A
SECTION
VIII
BACKDATING
8-1. INTRODUCTION.
8-2. This section contains backdating information which
adapts this manual to instruments with serial numbers
lower than that shown on the title page.
8-3. CHANGE SEQUENCE.
8-4. Changes are listed in the serial number order that they
occurred in the manufacture of the instrument. However, in
adapting this manual to an instrument with a particular
serial number, apply the changes in reverse order. That is,
begin with the latest change and progress to the earliest
change applying to that serial number. Table 8-1 lists the
serial numbers to which each change applies.
Table 8
-
1. Manual
Backdating Changes.
Instrument Seriat Number
Make Manual Changes
1538A00101 thru
1538A02730
1
CHANGE L
Section
V. Replace
Paragraphs
5-21(d),
5-26(b)
and
5-27(c) with the following paragraph.
d.
If it is not possible to adjust within this limit, remove
R49 and repeat Step c. If R49 has already been removed, it
may be necessary to replace it.
b.
If RIO does not have sufficient range for this adjust-
ment, remove R20 and repeat Step a. If R20 has already
been removed, it may be necessary to replace it.
• c.
Adjust R47 for a display of 1.000. If R45 does not
have sufficient range, it may be necessary to remove R49. If
R49 has already been removed, it may be necessary to
replace it.
Section VI. Change, delete, or add the -hp- part numbers
and descriptions of the replaceable parts as listed in Table
Section VIII
Table 8-2.
Replaceable Parts.
Reference Designator
-hp- Part No.
Description
Change Al
03476-66501
PC Assembly, Main Board
Change Al C3
0160-2605
.02 µF
Change Al C10
0160-2605
.02 µF
Change Al Cl 7
0160-2605
.02 µF
Change Al C18
0160-2605
.02 µF
Delete Al C22
Add Al R30
0698-3153
3.83 kit
Delete Al R31
Add Al R32
,
0757-0281
2.74 tat
Add Al R33
0757-0407
200 11
Change Al R47
2100-0554
500 ft
Change Al R50
0757-0283
2 kft
Delete Al R51
Delete Al R55— R153
Change
1205-0298
Heat Sink
Section VII. Change the component locator and schematic
diagrams as in Figures 8-1, 8-2 and 8-3.
8-1
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