– 40 –
3) Play back the middle part of the test tape (TTA-100), and check that the level is 0.25% or less.
15. Head Azimuth Adjustment (DECK 1 and DECK 2)
Requirement
•
Measuring instrument: Oscilloscope
•
Test tape: TTA-300(10kHz)
•
Test point: TP8(LCH),TP9(RCH)
•
Adjustment point: Head azimuth adjustment screw
1) Connect the CH1 probe of the oscilloscope to TP8 (LCH) and the CH2 probe to TP9 (RCH).
2) Set the V mode of oscilloscope to ADD.
3) Insert the test tape (TTA-300) to DECK 1. Forward and play back the middle part of the tape,
and adjust the head azimuth adjustment screw so that the waveform during playback of 10kHz
becomes maximum.
4) After adjustment, secure the screw with bonding (1600B).
5) Apply the above steps 3 and 4 to DECK 2.
16. Playback Frequency Check (DECK 1 and DECK 2)
Requirement:
•
Measuring instrument: AC millivoltmeter
•
Test tape: TTA-300(315Hz/10kHz)
•
Test point: TP8(LCH),TP9(RCH)
1) Connect the CH1 of AC millivoltmeter to TP8 (LCH) and the CH2 to TP9 (RCH).
2) Insert the test tape (TTA-300) to DECK 1, and play back 315Hz and 10kHz.
3) Check that the level of 10kHz is ranged within ±3dB compared to the output level
of 315Hz as a reference.
4) Apply the above steps 2 and 3 to DECK 2.
17. Playback Sensitivity Check (DECK 1 and DECK 2)
Requirement:
•
Measuring instrument: AC millivoltmeter
•
Test tape: TTA-200(400Hz)
•
Test point: TP8(LCH),TP9(RCH)
1) Connect the CH1 of AC millivoltmeter to TP8 (LCH) and the CH2 to TP9 (RCH).
2) Insert the test tape (TTA-200) to DECK 1, and play back.
3) Check that the output level is ranged within 280mV±3dB.
4) Apply the above steps 2 and 3 to DECK 2.
18. Record/Playback Frequency Property Adjustment (DECK 2)
Requirement:
•
Measuring instrument: AC millivoltmeter, Audio signal
generator (low frequency generator),
Attenuator
•
Test tape: TTA-602(NORMAL)
•
Test point: TP8(LCH),TP9(RCH)
• Input point: AUX(1kHz / 8kHz)
Adjustment points: SFR451(LCH), SFR452(RCH)
1) Connect the CH1 of AC millivoltmeter to TP8 (LCH) and the CH2 to TP9 (RCH).
2) Connect the output from the generator to the attenuator and the attenuator to AUX of the unit.
3) Insert the test tape (TTA-602) to DECK 2, and record 1kHz from AUX.
4) Adjust the attenuator so that the output levels from TP8 and TP9 becomes 10mV.
5) Record 1kHz and 8kHz alternatively.
6) Adjust SFR451 (LCH) and SFR452 (RCH) so that the playback output level of 8kHz is ranged within
0±1dB compared to the playback output level of 1kHz as reference.
Содержание NSX-R30
Страница 23: ... 23 SCHEMATIC DIAGRAM 1 MAIN 1 2 ...
Страница 24: ... 24 SCHEMATIC DIAGRAM 2 MAIN 2 2 ...
Страница 26: ... 26 SCHEMATIC DIAGRAM 3 FRONT DECK ...
Страница 27: ... 27 WIRING 3 PT 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 A B C D E F G H I J K L M N O P Q R S T U ...
Страница 28: ... 28 SCHEMATIC DIAGRAM 4 PT ...
Страница 29: ... 29 WIRING 4 HP 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 A B C D E F G H I J K L M N O P Q R S T U ...
Страница 30: ... 30 SCHEMATIC DIAGRAM 5 HP ...
Страница 32: ... 32 FL CNF 8 FL BJ867GNK GRID ASSIGINMENT ANODE CONNECTION GRID ASSIGNMENT ANODE CONNECTION ...
Страница 33: ... 33 IC BLOCK DIAGRAM ...
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Страница 55: ...2 11 IKENOHATA 1 CHOME TAITO KU TOKYO 110 8710 JAPAN TEL 03 3827 3111 9620450 0251431 ...