28
CT-IS21
List of Adjustment
¶
Playback Section
(1) Tape Speed Adjustment
(2) Head Azimuth Adjustment
(3) Playback Level Adjustment
(4) Playback Frequency Characteristics Confirmation
¶
Recording Section
(1) Recording Bias Adjustment
(2) Recording Level Adjustment
(3) Recording Frequency Characteristics Confirmation
250
3dB
10k
12.5k
3dB
4dB
PLAY BACK
250
3dB
10k
12.5k
3dB
5dB
RECORDING
Fig. 6-2 Frequency Characteristics
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
Fig. 6-3 Test Tape STD-331E
Dolby noise reduction manufactured under license from Dolby
Laboratories Licensing Corporation.
“DOLBY” and the double-D symbol are trademarks of Dolby
Laboratories Licensing Corporation.
NCT-111 (3 kHz)
VR2701 (AF Assy)
(Refer to Fig. 6-4)
No.
Mode
Input Signal/Test Tape
Adjustment Points
Measurement Points
Adjustment Value
Remarks
PLAY
1
LINE OUT
(L, R ch)
(AF Assy)
3000 Hz
±
10Hz
(1) Tape Speed Adjustment
STD-331E
(10 kHz, –20dB)
Head azimuth
adjustment Screw
(Fig. 6-4)
Remarks
PLAY
1
LINE OUT
(L, R ch)
(AF Assy)
Max. Playback
signal level
(2) Head Azimuth Adjustment
• This unit is equipped with auto tape selector.
• Do not switch between forward and reverse operation with the screwdriver inserted.
6.2.1 Playback Section
After adjustment, apply silicon
bond to the head azimuth
adjustment screw.
No.
Mode
Input Signal/Test Tape
Adjustment Points
Measurement
Points
Adjustment
Value
FWD adjustment
REV Confirmation
( 3000 Hz
±
40Hz )
