ELECTRICAL ADJUSTMENT
13
2
4
3
5
24
L004
L006
TC001
L005
IC001
L007
C39
TU C.B
L003
(BAR-ANT)
3
7
M1
(DECK MOTOR)
8
MAIN C.B
+
L331
6
J201
78
2423
< TUNER SECTION >
1. AM IF Adjustment
L007 ....................................................................... 450kHz
2. AM VT Adjustment
Settings: • Test point: C39+
• Adjustment location: L004
Method: Set to AM 1000kHz adjust L004 so that the test
point becomes 3.7V±0.02V
3. AM Tracking Adjustment
L003 ....................................................................... 600kHz
TC001, L007 ........................................................ 1400kHz
4. FM VT Adjustment
Settings: • Test point: C39+
• Adjustment location: L006
Method: Set to FM 108MHz adjust L006 so that the test
point becomes 6.0V±0.2V
5. FM Tracking Adjustment
L005 ........................................................................98MHz
< DECK SECTION >
6. Bias frequency Adjustment
L331 .............................................................. 75Hz±500Hz
7. Tape speed Adjustment
Settings: • Test tape: TTA-100
• Test point: PHONES JACK (J201)
• Adjustment location: SFR of deck motor
Method: Play back the test tape and adjust so that the
output frequency is 3000Hz ±30Hz.
8. Azimuth Adjustment
Settings: • Test tape: TTA-320
• Test point: PHONES JACK (J201)
• Adjustment location:Azimuth adjustment
screw
Method: Play back the test tape and adjust so that the
output is maximum.
PRACTICAL SERVICE FIGURE
< TUNER SECTION >
< FM SECTION >
IHF Sensitiviy: Less than 18dB
(THD 3%) (at 98MHz)
Signal to Noise Ratio: Mono: More than 60dB
(Input 60dB) Stereo: More than 53dB
Distortion:
(Input: 60dB) Less than 2% (at 98MHz)
(Input: 120dB) Less than 3% (at 98MHz)
Auto stop level: 28dB±8dB (at 98MHz)
Stereo separation: More than 28dB (at 98MHz)
Intermediate frequency: 10.7MHz
< AM SECTION >
Sensitivity: Less than 48dB
(S/N 10dB) (at 600kHz)
Less than 46dB
(at 1000kHz)
Less than 44dB
(at 1400kHz)
Signal to Noise Ratio: More than 30dB
(at 600, 1000, 1400kHz)
Distortion:
(Input: 74dB) Less than 3% (at 1000kHz)
(Input: 115dB) Less than 10%
(at 1000kHz)
Auto stop level: Less than 60dB
(at 1000kHz)
Intermediate frequency: 450kHz
< DECK SECTION >
Tape speed: 3000Hz±60Hz
Wow & flutter: Less than 0.35% (R.M.S)
Take-up torque: 30-60g-cm (FWD)
FF&REW torque: 75-160g-cm
Distortion: Less than 5% (REC/PB, 1kHz)
S/N ratio: More than 40dB (PB, AC, DC)
More than 40dB
(REC/PB, AC, DC)
Max Noise level: Less than 35mV
(PB, VOL MAX)
Erasing Ratio: More than 40dB
Test tape: TTA-320
TTA-602 (NORMAL)
TTA-615 (HIGH POSITION)
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