ELECTRICAL ADJUSTMENTPRACTICAL SERVICE FIGURE
<TUNER SECTION><DECK SECTION>
<FM SECTION>Tape speed:3000 Hz ? 60 Hz
A MAIN C.B (PARTS SIDE VIEW)
IHF Sensitivity:Less than 20 dBWow & flutter:Less than 0.35%
(THD 3 %)[at 88.0 / 98.0 /108.0 MHz](JIS RMS)
8Signal to noise ratio:More than 58 dBTake-up torque:30 ~ 60 g-cm
(Input - 54 dB)[at 98.0 MHz ]F.F & REW torque55 ~ 140 g-cm
Distortion:Less than 3.0%Back tension:1 ~ 5 g-cm
(Input - 54 dB)[at 98.0 MHz]S/N ratio:More than 50 dB
Stereo separation:More than 20 dB(PB, SP OUT, DC)
L3[at 98.0 MHz]More than 44 dB
TC1L4 L51Intermediate frequency: 10.7 MHz(PB, SP OUT, AC)
TP1(VT)L401Distortion:Less than 2.0%
TC51<MW SECTION>(PB, SP OUT, DC)
TP401Sensitivity:Less than 50 dBLess than 2.5%
L6C404
(S/N 10 dB)[at 600 /603 KHz](R/PB, SP OUT, DC)
L5
C36 C39Less than 48 dBNoise levelLess than 20 mV
[at 1000 /999 kHz](PB, SP OUT, VOL MAX, AC)
IC1IC2J301Less than 46 dBLess than 25 mV
[at 1400 /1404 kHz](R/PB, SP OUT, VOL MAX, AC)
Signal to noise ratio:More than 30 dB
(Input -74 dB)[at 600 /603 /1000 /999 /1400 /
1404kHz]
Distortion:Less than 1.5%
(Input -74 dB)[at 1000 /999 kHz]
Intermediate frequency: 450 kHz
<LW SECTION>
Sensitivity:Less than 60 dB
6 4213 5(S/N 10 dB)[at 153 KHz]
Less than 63 dB
[at 198 kHz]
Less than 60 dB
<TUNER SECTION><DECK SECTION>[at 288 kHz]
Signal to noise ratio:More than 30 dB
1. FM VT Adjustment7. Head Azimuth Adjustment(Input -80 dB)[at 153 /198 /288 kHz]
Settings: Y Test point: TP1 (VT)Settings: Y Test tape: TTA-320Distortion:Less than 3.0%
Y Adjustment location: L6Y Test point: J301 (Phones jack)(Input -100 dB)[at 198 kHz]
Method: Set to FM 108.0 MHz and adjust L6 so that the testY Adjustment location:
point becomes 5.6 ? 0.2 V V.Head Azimuth Adjustment Screw
Method: Play back the 8 kHz signal of test tape and adjust screw
2. FM Tracking Adjustmentso that the output becomes maximum.
L5 ............................................................................... 90.0 MHz
8. Bias OSC Fequency Adjustment
3. MW VT AdjustmentSettings: Y Test point: TP401
Settings: Y Test point: TP1 (VT)Y Adjustment location: L401
Y Adjustment location: L4Method: Set to recording mode and adjust L401 so that the test
Method: Set to MW 1710 kHz and adjust L4 so that the testpoint becomes 85 kHz ? 1 kHz.
point becomes 6.0 ? 0.2 V V.
4. MW Tracking Adjustment
L3 ................................................................................. 600 kHz
TC1 ............................................................................ 1400 kHz
5. LW VT Adjustment
Settings: Y Test point: TP1 (VT)
Y Adjustment location: L51
Method: Set to LW 288 kHz and adjust L51 so that the test
point becomes 5.6 ? 0.2 V V.
6. LW Tracking Adjustment
L3 ................................................................................. 153 kHz
TC51 ............................................................................ 288 kHz
2324 |
ACEC
