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I
ADJUSTMENTS
<CONFIRMATTON OF
AUDIO
SECTION>
Before
adjustment
Note 1:
After
the
power
switch
is pushed
on, wait
for
5
minutes
before measuring,
to
be sure
of
the
most stable
operation.
Step
Confirmation
Test
point
Rating
or
standard
Adjustment
method
Rimark
1
Power
supply
voltage
+B-E
_B-E
+20-E
+12-E
+9-E
-9-E
+5.6
-
E
FB-E
AB-E
+36V
t
5V
-36V
tsv
+20v
t2v
+12.5V
t
lV
+9.5V +O.sV
-8.9V
t0.5V
+5.6V
t0.5V
At
FM reception mode'
+12V
t
1V
At
AM
reception mode
less
than
+1V
At
FM reception mode
less
than
+1
V
At
AM
reception mode
+12V +
lV
Make sure
that
AC line voltage
comes
within
Models
AC line voltase
u-c
120V
t
10%
G
?/i20v
L,10%
A,B
240V
+
10%
No
load
2
DC
offset
Speaker
terminal
or pin
5
ol
1C112
(L
ch) and Pin
12
(R ch)
OV
t50mV
\l
\-/
<TUNER ADJUSTMENT>
oBefore adjustment
Note
1) After
the
Power
switch
is pushed
on,wait for
5
minutes before
measuring,
to
be
sure
of
the
most stable
operation.
Note
2)
Adjust the
OSC
coil
and IFT
with
a
nonferrous
screw
driver.
Note
3)
Do
not forget
to
keep
the
bottom
cover on.
1.
FM
TUNER
SECTION
oUse 200H2
to
lskHz
bandpass
filter
to
measure
the
REC OUT.
.On
step
1
and
2
connect
the auxiliary center
meter
(J|0OO36
or
similar)
in
series
with the
resistor
1OkO
between
TPI
(S
OUT)
and
TP2 (NVcc).
Auxiliary
center meter
o
Measu
ring inslruments abbreviation
FM
SG
SSG
AM
SG
OSC
DIST.
M
FC
ACVM
FM signal generator
Stereo
signal
generator
AM
signal generator
Oscilloscope
Distortion
meter
Frequency
counter
AC
volt
meter
oSet the
switches
to
the
following
positions.
INPUT
....
TUNER
BandSelect ..
FM
TUNING/MODE
...
AUTO
VOLUME
.
.
Min
4
Step
Adiustment item
Connection
terminal
tnstrument
required
Adiustment
locations
Adiustment
method
Rating
or
standard
Bemarks
1
Detuned
noise
confirmation
T101
(ST DIST}
Adjust
noise
level
to
maximum
at detuned
point.
2
Discriminator
balance
adjust-
ment
TPl
-TP2
(S
out)(NVcc)
Auxiliary
center
meter
T102
(DISCRI
CENTER}
Adjust
so
that the
pointer
of
the
auxil-
iary
center meter
points
to
0
at detuned
point.
3
station
center
set
confirmation
300s}
FM
ANT
TP1
-TP2
(S
out) (NVcc)
FM
SG
[gguH,
t
tttt, I
lzoosrr
(75.2dBr)
|
IMONO
lkHz
I
[roox
uoo ]
Auxiliary
center
meter
TUNING
SW
+UP
or
DOWI
Confirm that the auxil-
iary center meter
deflects
to
0 at tuned
the
signal
of
FM
SG
4
Monaural
distor-
tion
adiustment
300r}
FM
ANT
REC
OUT
(TP7, TP8}
FM
SG
[98MHz
t
1t<Hz
I
lzoaep
l75.2dBtl
I
I
monaural
1
OOHz
orl
L+oon'
1oo%
MoD_.j
DIST.
M.
OSC
BPF
vc101
(MONO DIST)
Reduce
distortion
to
minimum
Less
than
-64d8
Confirm that
all signal O
indicators
lisht
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