XV-GX3
57
5
6
7
8
5
6
7
8
C
D
F
A
B
E
6. ADJUSTMENT
6.1 DECK SECTION
6.1.1 ADJUSTMENT CONDITION
7
Adjustment Condition
(1) The ground at the time of adjustment shall be JA3001(GND)
(Refer to Fig. 6–2).
(2) Clean the heads and demagnetize them using a head eraser.
(3) Set the measurement level to 0 dBV = 1 Vrms.
(4) Use the specified tape for adjustment. Use the labeled (A) side
of the test tape.
NCT–111 or STD-301
: For Tape Speed adjustment
NCT-112 or STD-331E
: For Playback adjustment
STD–630 or STD-631
: Normal blank tape
(5) Provide yourself with the following measuring devides:
÷
AC millivoltmeter
÷
Low-frequency oscillator
÷
Attenuator
÷
Oscilloscope
(6) Adjust both right and left channels unless other wise specified.
(7) Warm up the unit for several minutes before adjustment. In
particular, be sure to warm up the unit in the REC/PLAY mode
for 3 to 5 minutes before starting recording/playback frequency
characteristics adjustment.
(8) Always follow the indicated adjustment order.
Otherwise, a complete adjustment may not be achieved.
7
List of Adjustments
¶
Playback Section
(1) Tape Speed Confirmation
(2) Head Azimuth Adjustment
¶
Recording Section
(1) Recording Bias Adjustment
Fig. 6-1 Test Tape NCT– 112 ( STD-331E)
0 dB
–20 dB
30s
0 dB: 315 Hz, 250 nwb/m
315 Hz
6.3 kHz
10 kHz
315 Hz
14 kHz
12.5
kHz
6.3
kHz
500
Hz
250
Hz
125
Hz
10 kHz 8 kHz
4 kHz 2 kHz
63 Hz 40 Hz
1 kHz
30 s 30 s 30 s 10s 10s .......................................................................................................... 10s
* As the reference recording level is 250nwb/m for STD-331E,
the recording level will be higher by 4 dB for STD-331B
(160nwb/m).
When adjusting, pay carefull attention to the type of tape used.
