-39-
17. Playback Sensitivity Check (DECK 1 and DECK 2)
Requirements
•
Measuring instrument: Millivoltmeter
Test tape: TTA-200 (400 kHz)
Test points: TP8 (Lch), TP9 (Rch)
1) Connect CH1 of the millivoltmeter to TP8 (Lch) and 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 140 mV
±
3 dB.
4) Apply the above steps, 2) and 3) to DECK 2.
18. Record/Playback Frequency Response Adjustment (DECK 2)
Requirements
•
Measuring instrument: Millivoltmeter, Audio signal
oscillator (low frequency
oscillator), Attenuator
Test tape: TTA-602 (NORMAL)
Test points: TP8 (Lch), TP9 (Rch)
Input point: AUX (1 kHz / 10 kHz)
Adjustment points: SFR451 (Lch), SFR452 (Rch)
1) Connect CH1 of the millivoltmeter to TP8 (Lch) and CH2 to TP9 (Rch).
2) Connect the output of the oscillator to the attenuator, and then the attenuator to AUX of the unit.
3) Insert the test tape (TTA-602) to DECK 2, and record 1 kHz signal from AUX.
4) Adjust the attenuator so that the output levels at TP8 and TP9 are ranged at 10mV.
5) Record 1 kHz and 10 kHz alternatively.
6) Play back the tape. Adjust SFR451 (Lch)/SFR452 (Rch) so that the playback output level of 10 kHz is ranged within 0
±
1 dB
compared to the playback output level of 1 kHz as reference.
19. Record/Playback Sensitivity Check (DECK 2)
Requirements
•
Measuring instrument: Same as the above, 18
Test tape: TTA-602 (NORMAL)
Test point: TP8 (Lch),TP9 (Rch)
Input point: AUX (1 kHz)
1) Insert the test tape (TTA-602) to DECK 2, and record 1 kHz signal from AUX.
2) Adjust the attenuator so that the output levels at TP8 and TP9 are 100 mV.
3) Play back 1kHz, and check that the output level is ranged within -2 dB
±
3.5 dB compared to the recording output level.
ELECTRICAL ADJUSTMENT -6/7
Summary of Contents for CX-NR71
Page 25: ... 25 SCHEMATIC DIAGRAM 1 5 MAIN 1 2 AMP SECTION ...
Page 28: ......
Page 42: ... 42 LCD DISPLAY 1 2 HUA 11MM42T GRID ASSIGNMENT ...
Page 43: ... 43 LCD DISPLAY 2 2 HUA 11MM42T ANODE CONNECTION PIN CONNECTION ...
Page 44: ... 44 IC BLOCK DIAGRAM 1 1 IC LC72131D N IC BU2092F IC M61518FP IC LA1845N A IC BU1920FS ...
Page 57: ...2 11 IKENOHATA 1 CHOME TAITO KU TOKYO 110 8710 JAPAN TEL 03 3827 3111 0251431 ...