Model 8903BD Service
All serial prefixes
2717A to 2742A
2728A and below
2730A
to
2813A
for HP8903B
and
2730A
to
2814A
for HP8903E
CHANGES
On the Component Locator
0
Ul,U2,U6,U8,U12,U13
-
U1, U2, U6, US, U12 and U13 are round cans and
0
-
R211
-
On page 8B-118.3, in the lower right hand corner of the component
the tabs should be in the 2:OO o’clock position
locator, add R211 between R209 and R210.
On the Component Coordinates:
0
-
R211
-
Add R211 A,3, to the partial component coordinate table on page
8B-114.3.
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
-
SS7
-
The 08903-60128 board
is
obsolete, to replace this board you must
order the 08903-60282 (not Quasi- Peak).
0
-
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-118.3.
On the A4 schematic:
0
-
SS7
-
Change the A4 board part number 08903-60128 to 08903-60183
(Quasi-Peak).
On the Component Locator:
0
-
A4
-
Use the partial component locator on page 8B-114.3.
In General Information:
Add the following notes;
0
NOTE
5: When in
5.7
Special (Quasi) the AVG/RMS line is high.
0
NOTE
6:
Unused gates U29C
and
U29D have their inputs and outputs
grounded.
On the Component Coordinates:
0
-
R211
-
Use the partial component coordinates on page 8B-114.3.
ss7
rev.14FEB89
8B-118.1
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