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ADJUSTMENT
A MAIN C.B
L301
0
R334
BAR ANT.
TP301
PN751
9
1
8
SFR751
RPH (DECK1)/PH(DECK2)
9
L3
L2
L152
L5
IFT101
TP1
TP2
R102
SFR102
IC101
TP3
R107
SFR101
TP4
MFT101
L61
L52
CT51
11
<TUNER SECTION>
1. AM VT Adjustment
Settings: • Test point: TP1
• Adjustment location: L52
Method: Set to AM 530 kHz adjust L52 so that the test point
4
becomes 1.3 V ± 0.05 V.
2. AM Tracking Adjustment
L61 ............................................................................... 600 kHz
3
CT51 .......................................................................... 1400 kHz
3. FM VT Adjustment
5
Settings: • Test point: TP1
6
• Adjustment location: L5
Method: Set to FM 87.5 MHz adjust L5 so that the test point
becomes 4.0 V ± 0.3 V.
7
4. FM Tracking Adjustment
L2, L3 ...................................................................... 87.5 kMHz
5
1
5. DC balance/ MONO Distortion Adjustment
Settings: • Test point: TP2, TP3
• Adjustment location: IFT101
• Input level: 60 dB
Method: Set to FM 98.0 MHz and adjust IFT101 so that the
voltage between TP2 and TP3 becomes 0 V ± 0.02 V.
2
6. AM tuning Adjustment
Settings: • Adjustment location: SFR102
Method: Make setup for AM 1400 kHz. Adjust SFR102 so that
the machine performs Auto Stop when 50 ± 2 dB is
input.
* Confirm that TP4 is "L" at this time.
PRACTICAL SERVICE FIGURE
<RADIO SECTION>
<FM>
Frequency range:
87.5 ~ 108.0 MHz
IHF Sensitivity:
18.0 ± 5.0 dB (at 87.5 MHz)
(Distortion 3%):
19.0 ± 5.0 dB (at 98.0, 108.0 MHz)
S/N ratio:
60 ± 5.0 dB (at 98.0 MHz)
Intermediate frequency:
10.7 MHz
Stereo separation:
More than 20 dB
<AM>
Frequency range:
530 ~ 1710 kHz
Sensitivity:
50 ± 5 dB (at 600 kHz)
45 ± 5 dB (at 1000 kHz)
43 ± 5 dB (at 1400 kHz)
Intermediate frequency:
450 kHz
7. FM tuning Adjustment
Settings: • Adjustment location: SFR101
Method: Make setup for FM 98.0 MHz. Adjust SFR101 so that
the machine performs Auto Stop when 33 ± 2 dB is
input.
* Confirm that TP4 is "L" at this time.
<TAPE SECTION>
8. Tape Speed Adjustment (DECK1)
Settings: • Test tape: TTA-100
• Adjustment location: SFR751
Method: Play back the test tape with DECK1 and adjust SFR751
so that the output frequency is 3000 Hz. After the ad-
justment, check that the frequency of DECK2 is 3000
± 45 Hz.
9. Azimuth Adjustment (DECK1, DECK2)
Settings: • Test tape: TTA-320
• Adjustment location:
Head azimuth adjustment screw
Method: Play back the 10 kHz signal of test tape and adjust
screw so that the output becomes maximum.
10. Bias OSC Fequency Adjustment
Settings:• Test tape: TTA-601
• Adjustment location: L301
• Test point: TP301
Method: Set to the REC mode. Adjust L301 so that thr fre-
quency counter of the test point becomes 71.5 kHz ±
0.5 kHz
<TAPE RECORDER SECTION>
Recording bias frequency:
71.5 ± 0.5 kHz
Erasing ratio (400 Hz, 0 dB): More than 60 dB
Distortion (T. H. D 10%):
Less than 3.0% (PB)
S/N ratio:
More than 40 dB (AC/DC, PB)
More than 37 dB (AC, REC/PB)
Noise (PB)
Less than 1 mV/0.6 mV
(AC/DC, MIN)
Tape speed:
3000 ± 90 Hz
Wow & flutter:
Less than 0.4% (JIS UN WTD)
Take-up torque:
45 ± 15 g-cm
+40
F.F & REW torque
100
g-cm
–45
12
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