Model 8903BB
Service
CHANGES
All
serial
prefixes
2717A
to
2742A
2728A
and below
~ ~ ~~
On the Component Locator:
0
Ul,U2,U6,U8,U12,U13
-
U1, U2, U6, U8, U12 and U13 are round cans and
the tabs should be in the 2:OO o’clock position.
0
U29A
-
On the left hand side of the new A4 OUTPUT
AMPLIFIERflOLTMETER ASSEMBLY (08903-601831, locate U29A and
change pin
1
to 2 and pin 2 to
1.
0
Delete the page number (8B-116.3) on the schematic foldout that is tied to
serial prefix 2730A and replace it with a revision date
of
rev.lOMAY87.
0
R211
-
On page 8B-114.4, in the lower left hand corner
of
the component
-
locator, add R211 between R209 and R210.
On
the Component Coordinates:
0
-
R211
-
On
page 8B-114.3, add R211 A,3,
to
the partial coordinates table.
On
the
A13
schematic:
0
08903-60192
-
Change the part number of the A13 POWER SUPPLY AND
MOTHERBOARD ASSEMBLY from 08903-60129 to 08903-60192.
On
the
A4
schematic:
0
SS6
-
The 08903-60128 board is obsolete, to replace this board
you
must
-
order the 08903-60282 (not Quasi-Peak).
-
Note:
-
The 08903-60282 (not Quasi-Peak) and the 08903-60283
(Quasi-Peak) are identical boards except for the positioning
of
W1.
See
partial schematic on page 8B-116.5, and the Component Locator on page
8B-116.6.
rev.14FEB89
SS6
8B-116.1
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