ELECTRICAL ADJUSTMENT
D TUNER C.B
| 567 |
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| L003 (MW BAR ANT) |
TC001 | 2 | L004 | L051 | 123 |
| 1 |
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| 3 |
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| TP2(VT) | |
TC051 |
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| + | |
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L005 | L006 |
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| C039 |
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| TP1(DET) |
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4 |
| IC001 | 16 | 21 |
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1 |
| IC002 | 1 | ||
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| L007 |
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89
B CD C.B
IC404
SFR430
#
CN401
A MAIN C.B |
| IC801 |
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| CN801 |
| CN201 | L801 |
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@
CASSETTE DECK MOTOR | CASSETTE DECK HEAD | E H.P. C.B | ||
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J251 PHONES
0 | ! | 0! |
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< TUNER SECTION >
1.FM VT Adjustment
Settings : • Test point : TP2 (VT)
• Adjustment location : | L006 |
Method : Set to FM 108.0MHz and adjust L006 so that the test point voltage becomes 6.0V ± 0.05V.
2.MW VT Adjustment
Settings : • Test point : TP2 (VT)
• Adjustment location : | L004 |
Method : Set to MW 1000kHz (U), MW 999kHz (EZ,K) and adjust L004 so that the test point voltage becomes 3.75V ± 0.05V.
3.LW VT Adjustment <EZ,K> Settings : • Test point : TP2 (VT)
| • Adjustment location : | L051 |
| Method : Set to LW 288kHz and adjust L051 so that the | |
| test point voltage becomes 4.5V ± 0.05V. | |
4. | FM Tracking Adjustment |
|
| L005 | 98.0MHz |
5. | MW Tracking Adjustment <U> |
|
| L003 | 600kHz |
| TC001 | 1400kHz |
6. | MW Tracking Adjustment <EZ,K> |
|
| L003 | 603kHz |
| TC001 | 1404kHz |
7. | LW Tracking Adjustment <EZ,K> |
|
| L003 | 153kHz |
| TC051 | 288kHz |
8.AM IF Adjustment <U>
Settings : • Test point : TP1(DET)
| • | Adjustment location : | L007 |
Method : | Adjust L007 so that the output level at 1400kHz | ||
| becomes maximum. |
| |
9. AM IF Adjustment <EZ,K> |
| ||
Settings : | • | Test point : TP1 (DET) |
|
| • | Adjustment location : | L007 |
Method : | Adjust L007 so that the output level at 1404kHz | ||
| becomes maximum. |
| |
< DECK SECTION >
10.Tape Speed Adjustment
Settings : • Test tape :
•Test point : J251 (PHONES jack)
•Adjustment location : SFR of deck motor
Method : Play back the test tape and adjust SFR so that the frequency counter reads 3000Hz ± 30Hz.
11.Head Azimuth Adjustment
Settings : • Test tape :
•Test point : J251 (PHONES jack)
•Adjustment location : Azimuth adjustment
screw
Method : Play back the 8kHz signal of the test tape and adjust screw so that the output becomes maximum.
12.Bias frequncy Adjustment
L801..................................................................85kHz±0.5kHz
< CD SECTION >
13.FE Balance Adjustment
Settings : • Test point : IC401 PIN58 (VR), IC401 PIN 20 (FE)
• Adjustment location : SFR430
Method : Playback the disc and adjust SFR430 so that the test point voltage becomes 0V.
PRACTICAL SERVICE FIGURE
<TUNER SECTION >
<FM SECTION >
Sensitivity: | Less than 18dB (87.5MHz) |
(THD 3%) | Less than 18dB (98.0MHz) |
| Less than 18dB (108.0MHz) |
Signal to Noise Ratio: | More than 66dB (at 98.0MHz) |
(Input 60dB) | (EXCEPT U) |
| More than 58dB (at 98.0MHz) |
| (U) |
Distortion: | Less than 3% (at 98.0MHz) |
(Input 60dB) |
|
Intermediate frequency: | 10.7MHz |
Stereo separation: | More than 20dB |
< AM SECTION >
Sensitivity: | Less than 48dB (at 600kHz) |
(S/N 10dB) | Less than 46dB (at 1000kHz) |
| Less than 44dB (at 1400kHz) |
Distortion: | Less than 3% |
(Input 74dB) |
|
Intermediate frequency: | 450kHz |
< LW SECTION >
Sensitivity: | Less than 60dB (at 153kHz) |
(S/N 10dB) | Less than 56dB (at 198kHz) |
| Less than 52dB (at 288kHz) |
Distortion: | Less than 3% |
(Input 80dB) |
|
Intermediate frequency: | 450kHz |
< CASSETTE SECTION >
Tape speed: | 3000Hz±60Hz |
Wow & flutter: | Less than 0.3% (JIS RMS) |
FF torque: | |
Rew torque: | |
S/N ratio: | More than 35dB |
Distortion: | Less than 3.0% (PB) |
Noise (PB): | Less than 1mV |
| (AC/DC, MIN) |
Erasing Ratio (W/FILTER): | More than 45dB |
27 | 28 |
