Sharp SA-201H Serviceanleitung Seite 10
Inhaltsverzeichnis
SA-201H(BK)
FM IF/RF
ADJUSTMENT
SWITCH
FM mono
POSITION
SIGNAL
400 Hz, 40 kHz dev., FM modulated
GENERATOR
TEST
REF-
STEP
STAGE
OUENCY
1
10.7
MHz
2
Detection
Repeat steps I and 2 until no further
3
87.35
4
MHz
Band
108.30
5
Band
MHz
Repeat steps 4 and 5 until no further
6
7
90 MHz
8
Tracking
106 MHz
Repeat steps 7 and 8 until no further
9
made.
Potentiometer
Band
87.35
10
MHz
coverage
ADJUSTMENT
OF FM DETECTOR
• Apply a signal of 98 MHz to the Antenna Socket and set
the
signal
generator
400 Hz (40 kHZ dev., modulated
11
• Connect
electronic
that
the voltmeter
• Adjust T104 so that the output at the headphones jack has
a minimum
distortion
DIAL
AD-
REMARKS
POINTER
JUST.
SETTING
MENT
1. using a minus
driver, turn the
core of T 103
counter-clock-
TIOI
wise before
High
ing it out Of the
frequency
bobbin.
2. Adjust for best
"IF"
curve.
T 103,
Adjust for best
T104
"S"
curve.
improvement
can be
Lowest
L5
frequency
Adjust
for
maximal
Highest
TC3
frequency
improvement
can be
90 MHz
L3, L4
Adjust for
TCI .
maximal
106 MHz
TC2
improvement
can be
VR302—
306
Adjust for
VR301
Lowest
maximal
frequency
COIL
to produce
an FM mono
signal of
at I kHz.)
voltmeter
to TP4, 5 and adjust T 103 to
reads O V.
(0.7%
or less).
Generator
o
tak-
output.
output.
FM Sign.l
output.
Generator
o
Figure 12—4
VCIOI
unit
Figure 12—1 FM IF
'0.7
MHZ
Figure 12—
2
FM IF CURVE
10.7
Figure 12
-3
FM "S"
CURVE
FM
External
Antenna
Socket
Speaker
Output
SOI
unit
Groun<
FM RF/POTENTIOMETER
Oeillosoop•
Electronic
Voltmeter
o
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