-24-
ELECTRICAL ADJUSTEMENT-1/1
L004
L005
L007
IC001
L330
J251
SFR761
SFR430
TC001
1
3
6
7 8
7
RPH/PH
8
FRONT C.B
MAIN C.B
BAR ANT
L003
C39
2 4
4
2
3
L006
5
9
< TUNER SECTION >
1. AM IF Adjustment
L007 .................................................................................... 530 kHz
2. AM VT Adjustment
Settings: • Test point: C39 + (TP1)
• Adjustment location: L004
Method: Set to AM 1710 kHz adjust L004 so that the test point
becomes 5.6 V
±
50 mV
3. AM Tracking Adjustment
L003 .................................................................................... 600 kHz
TC001 ............................................................................... 1400 kHz
4. FM VT Adjustment
Settings: • Test point: C39 + (TP1)
• Adjustment location: L006
Method: Set to FM 108 MHz adjust L006 so that the test point
becomes 5.6 V
±
50 mV
5. FM Tracking Adjustment
L005 ..................................................................................... 98 MHz
< TAPE SECTION >
6. Bias frequency Adjustment
L330 ......................................................................... 56 kHz
±
2 kHz
7. Tape speed Adjustment
Settings: • Test tape: TTA-100
• Test point: PHONES JACK (J251)
• Adjustment location: SFR761
Method: Play back the test tape and adjust so that the output
frequency is 3000 Hz
±
30 Hz.
8. Azimuth Adjustment
Settings: • Test tape: TTA-310
• Test point: PHONES JACK (J251)
• Adjustment location: Azimuth adjustment screw
Method: Play back the 8kHz signal of the test tape and adjust screw
so that the output becomes maximum.
< CD SECTION >
9. Focus Bias Adjustment
Settings: • Test CD: TCD-782 (A-BEX)
• Test point: IC401 PIN20, PIN58
• Adjustment location: SFR430
Method: Play back the #15 of the test CD and adjust SFR430 so that
the voltage between pin20 and pin 58 of IC401 becomes
0V
±
0.1 mV.
PRACTICAL SERVICE FIGURE
< TUNER SECTION >
< FM SECTION >
Sensitivity:
Less than 22 dB (87.5 MHz)
(THD 3%)
Less than 22 dB (98.0 MHz)
Less than 22 dB (108.0MHz)
Signal to Noise Ratio:
More than 55 dB (at 98.0 MHz)
(Input 32 dB)
Distortion:
Less than 3.0% (at 98.0 MHz)
(Input 32 dB)
Intermediate frequency:
10.7 MHz
±
0.3 MHz
Stereo separation:
More than 18 dB (at 1 kHz)
< AM SECTION >
Sensitivity:
Less than 52 dB (at 600 kHz)
(S/N 10 dB)
Less than 50 dB (at 1000 kHz)
Less than 50 dB (at 1400 kHz)
Distortion:
Less than 3%
(Input 88 dB)
Intermediate frequency:
530 kHz
±
5 kHz
< CASSETTE SECTION >
Tape speed:
3000 Hz
±
60 Hz
Wow & flutter:
Less than 0.35% (JIS RMS)
Take-up torque:
30-60 g-cm (DECK 1/2)
FF torque:
55-140 g-cm (DECK 1/2)
Rew torque:
55-140 g-cm (DECK 1/2)
Back tension:
1-5 g-cm
S/N ratio:
More than 50 dB (DC)
Distortion:
Less than 3.0% (PB)
Noise (PB):
Less than 0.9 mV (DC)
Less than 15 mV
(AC VOL max)
