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Model
654A
Appendix C
QMANUAl BACKDATING CHANGES
Model
654A
TEST OSCILLATOR
Serials Prefixed:
0951
A-
This manual backdating sheet makes
this
manual
applicable
to earlier instruments.
Instrumen
t-component
values
that differ
from
those in the manual, yet
are
not list ed
in
the backdating
shee
t, should
be
replaced
using
the part number
given
in the
manual.
I
nstrumenl Serial
Prefix
Make
Manual
Changes
InSlrumenl
Serial
Prefix
Make
Man
ual Changes
907-00200
and below
1
951-00340 and
below
1 2
0951 A00755 and
below
1,2,3
0951 AO 1700 and below
1,2,3,4
0951 A02260
and below
1,2,3
,
4,5
CHANGE NO. I
Table
6-1:
Change A2RII to R: fxd, 10 krl ±
1%,
1/8 W,
-hp- Part No. 0757-0442
.
Change
A2RI2 to R: fxd, 4.02
krl
±
1%,
1/8 W,
-hp-
Part No. 0698-3558.
Figure
7-2:
Change the value
of
A2RII
to
10 krl
and
the
value
of
A2R 12 to
4.02
krl.
CHANGE
NO.2
Table
6-1: Change
the -hp- Part No. of J I to 1251-0148
Change
the
-hp- Part
No
.
of
WI
to
8120-0078.
Change the -hp- Part No. of Panel: rear to 00653-00202
(Mechanical
Parts).
Change the -hp- Part No.
of
MPI7
to
00653-01204.
Delet
e
MP50,
Bracket:
Attenuator
-hp-
Part
No.
00653-01206.
CHANGE
NO.3
Change the -hp-
Part
No. ofTI to 9100-0294.
CHANGE NO.4
Page
6-3,
Table
6-1.
Delete A2CR25 and A2CR26
Page 6-4, Table
6-1.
Change A2 R61, 62 to
A2R61,
62;
0757-0384;
20 ohms.
Add A2R70
and
A2R73, 0686-2015,
200 ohms
)2
W.
Page 7-6
.
Change the
A2 Component Locator as
in
Figure C-I
.
- R 6 4 -
-C22-
-R79-
-CR20-
e
8
-
R70-
020
-R
68
-
-R71-
-
C26-
-C28-
8
-R74-
-R7S-
-CRI9-
~~I
-C31-
L\S3W
-
-C30-
-~g:;:
_cN_
2
i6
8
C33-
I\)I~
-R77~
-R76-
-R73-
Figure C-1.
PIa
A2 Component Lo c-
....
j
, >-.
'L ••
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