Ser
v
i
ce Model 89036
ComDonent Coordinates
-
COMP
R2
R3
R4
R5
-
~ ~~
NOTES
1.
DecouDle Drobe
with
a
10k
ohm resistor when measurina
this
voltaae
-
X.Y
-
COMP
~
c59
C60
C61
C62
C63
C64
C65
C66
C67
C68
C69
c70
C7
1
CRll
CRl8
CR19
CR20
CR21
CR22
CR23
CR24
CR25
CR26
CR27
08
09
010
011
012
R101
R104
R105
R107
R100
R109
RllO
Rlll
Rll2
R113
R114
R115
R116
R117
Rl18
RllS
Rl2O
R121
R122
0123
R124
R125
R126
R127
R128
Rl29
R130
R131
R132
R133
R134
R136
R136
R137
R138
R139
R140
R200
R201
lP7
TP9
lP10
Ul
u9
u10
u11
U15
U1B
u19
u20
u21
c2
c2
c3
C3
c1
02
02
02
02
01
01
02
01
c1
c1
01
01
01
GI
GI
01
01
01
01
01
02
0%
02
02
c3
02
01
c2
c3
c2
c2
C?
02
n2
c1
D1
01
01
01
01
01
03
03
01
01
01
02
01
01
01
01
0i
02
02
01
02
01
01
01
01
01
02
82
E1
01
c1
02
c1
c2
c3
01
01
E?
D1
02
. .~
2.
Measuied
with
respect
to
the
+15
VDC
supply.
3. THE A4 OUTPUT AMPLIFIER/VOLTMETER
ASSEMBLY
108903-601281
may
...-,
~~
.
......
~ ~ ~~~
retrofit
to
analyzers
with
serial prefixes 2306A or
lower,
having
A3 NOTCH FILTER ASSEMBLY (08903-60105). To retrofit,
carefully
unsold-
er A4R101
and
resolder
this
resister between points
A
and
B
as
shown
on
this
schematic
(SS7).
Unsolder A4R200
and
resolder
this
resistor
between
points
C
and
D (on
SS7).
Solder pads
and
mounting
holes are
prOVlDED
on
the
circuit
board.
4.
if
the
A4
OUTPUT AMPLIFIER/VOLTMETER ASSEMBLY (08903-60128)
is
to
be
used
in
an
8903A AUDIO ANALYZER
as
an
RMS
detector,
pin
1
of
t
e
XA4A connector must be grounded. Otherwise,
the
A4 assembly
wi
I
function
as
an
AVG detector.
lP8
?
METEA DC
CALIBRATION
?Q
AVO.
RMS
AVO. ZERO
RMS
ZERO
?
SCALE SCALE
lP2
ADJUST ADJUST
lP3
TPI
TP1l
-
1
-
2
-
3
-
Y
0
SO
1
a
4
0
r
RIH
aauu
Y
I
N
uu
c_l
B
I,
1
15
I
_I
pi
I
:
<
I
8
A4
I
I
A
B
C
D
Figure
86-118. SERVICE SHEET
7
INFORMATlON ComDonent Locator
Schematic General Information
86-118
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