1.
FM
TUNER SECTION ADJUSTMENT (Refer to Figs. 4, 5)
Step
Adjustment Adjustment
Result
Remarks
Item Point
Front
End
Tl
Selector
to
FM, and Mode
to
MONO.
1
IF
Coil
(Front
End)
Maximum Noise Level
Detune and receive only interstation
noise.
Connect a Center Tuning Meter between
Centered Tuning
TP201 and TP203.
2
S Curve Center T201-b
98
MHz
(Japan: 83 MHz) 60
dB
(mono)
Meter Indication
input.
Refer
to
NOTE 1
T201-a
Less than 0.15%
98
MHz
(Japan: 83 MHz)
3 Distortion Factor
Tl
Distortion Factor
60
dB
(mono) input.
(Front End)
Modulation: 1 kHz, 100%
4 Readjust
in
steps 2 and 3.
108 MHz (Japan:
90
MHz)
t)
Maximum Output
60
dB
(mono) input.
5
High Range Scale
C56
Minimum Distortion
Modulation: 1 kHz, 100%
Indication
(Front
End)
Factor
Scale indicator to 108 MHz
(Japan: 90 MHz)
Error:
within±
250 kHz
88
MHz
(Japan: 76 MHz)
Confirmation
of
Maximum Output
60
dB
(mono) input.
6 Low Range Scale
Minimum Distortion
Modulation: 1 kHz, 100% Scale
Indicator to 88
MHz
Indication Factor
(Japan: 76 MHz)
Error: within ± 250 kHz
High Range
C54,C55
Less than
3%
108
MHz
(Japan:
90
MHz), Better
than
7
6
dB
(mono) input.
Sensitivity (Front End)
Distortion Factor
Modulation: 1 kHz, 100%
Confirmation
of
88
MHz
(Japan: 76 MHz), Better
than
8 Low Range
Less than
3%
6
dB
(mono)
Sensitivity
Modulation: 1 kHz, 100%
1.
Detune then turn R515 (50 k) and temporarily light Signal
Signal LED
LED
1.
9
R515 (50 k)
2. Turn R515 (50 k)
in
clockwise direction until LED 1 goes
out.
Sensitivity
3. Input 98
MHz
(Japan: 83 MHz), 60 to
80
dB
and check
that
Signal LED 5 lights.
Mode Switch to STEREO. 98
MHz
(Japan:
8"3
MHz) 30
dB
10
FM
Mute Level
R210 (50 k)
input. Adjust R210 (50 k) to the point where the output signal
appears.
PLLMPX
Connect Frequency Counter between
11
Free Running
R304 (10 k)
19.00 kHz
TP301 and Ground 98
MHz
(Japan: 83 MHz)
Frequency
Modulation: not
Confirmation
of
98
MHz
(Japan: 83 MHz)
12
STEREO Indicator Must be lighted
60
dB
(stereo) input.
Modulation: 1 kHz, 100%, only light
indicator Lighting
channel
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