Dual CR 5950 RC Serviceanleitung Seite 3

Tuning lnstructions for CR 5950
Signal source Equipment
setting
Signal source setting Connection of
measuring Instrument
Item to be tuned
Tuning, Remarks
FM oscillator
87.5 MHz DC voltmeter to:
E 2 - 2
[106 1.7 V DC± 0.1 V
108 MHz CT 104
9.0 V DC ± 0.1 V
Repeat tuning
FM IF, Input circult
FM signal generator to
75-ohm
antenna input
Mono key: ON
Frequency with-
out transmitters
approx. 98 MHz
0 - 1 mV
Shift ± 40 kHz
Mod. 1 kHz
Tune to approx.
98 MHz
Harmonic detector
oscilloscope to L/R
speaker output via
load resistors
L 107
AF maximum
L 161 A
L 161 B
AF and harmonic distortion
minimum
90 MHz Tune to app. 90 MHz L 102, L 103, L 104 AF maximum at
min. noise
105 MHz
Tune to app. 105 MHz C 101,C 102,C 103
Repeat input-circuit tuning
FM IF (line tuning)
Antenna to
75-ohm
antenna input
Receivestrong
FM transmitter
at its nominal
frequency
DC voltmeter to:
TP 1 - TP 2 L 161 B
Determine DC maximum
and DC minimum
L 161 B Adjust power mean
L 161 A OV±1 mVDC
Repeat tuning
Transitlon between monaural, stereo and muting; signal indlcation, channel Separation
FM signal generator to
75-ohm
antenna input
Frequency with-
out transmitters
approx. 98 MHz
Mono key: OFF
Tune to approx. 98 MHz
Shift ± 40 kHz
Mod. 1 kHz
19-kHz pilot ON
6 µV
AF voltmeter,
oscilloscope to
UR speaker output
via load resistors
VR 161
Set monaural, stereo
and muting transition
1 mV VR 162
Third signal LED must light up
VR 201 Maximum channel separation
Suppression of realdual pilot frequencles (19 kHz)
FM signal generator to
75-ohm
antenna input
Frequency with-
out transmitters
approx. 98 MHz
Mono key: OFF
Tune to approx. 98 MHz
1 -2 mV,
19-kHz pilot ON
AF voltmeter,
oscilloscope to UR
speaker output
via load resistors
L 201 (lett channel)
Minimum
L 202 (right channel)
LPF (114 kHz)
AF generator OFF 114 kHz
1 Vpp to R 172
Oscilloscope
to C 181
[164 Minimum
AM oscIllator
522 kHz
DC voltmeter to
E2 - 2
L 152 1.4V DC ± 0.1 V
1611 kHz C152 10 V DC ± 0.1 V
AM IF, Input circuit
AM signal generator to
AM antenna input
999 kHz
10 µV- 1 mV, 1 kHz,
Mod. 30%
999 kHz
AF voltmeter,
oscilloscope to UR
speaker output via
load resistors
L 163
Maximum
594 kHz 594 kHz L151
1404 kHz 1404 kHz CT 151
AF closed-circuit current
Volume: min.
DC voltmeter to:
TP 1 - TP 3
VR 801 After 5 min, 4 mV
TP 2 -TP 4 VR 802 4 mV
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