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 1goes
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
