Pioneer CT-IS21 Service Manual page 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
Dolby noise reduction manufactured under license from Dolby
Laboratories Licensing Corporation.
"DOLBY" and the double-D symbol are trademarks of Dolby
Laboratories Licensing Corporation.
0 dB 30s
0 dB: 315 Hz, 250 nwb/m
30 s
315 Hz
6.3 kHz
6.2.1 Playback Section
(1) Tape Speed Adjustment
No. Mode Input Signal/Test Tape
1 PLAY NCT-111 (3 kHz)
(2) Head Azimuth Adjustment
• This unit is equipped with auto tape selector.
• Do not switch between forward and reverse operation with the screwdriver inserted.
No. Mode Input Signal/Test Tape
STD-331E
1 PLAY
(10 kHz, –20dB)
28
30 s 30 s 10s 10s .......................................................................................................... 10s
12.5
10 kHz 315 Hz 14 kHz
kHz
Fig. 6-3 Test Tape STD-331E
Adjustment Points
VR2701 (AF Assy)
(Refer to Fig. 6-4)
Adjustment Points
Head azimuth
adjustment Screw
(Fig. 6-4)
PLAY BACK
250
3dB
RECORDING
250
3dB
Fig. 6-2 Frequency Characteristics
6.3
10 kHz 8 kHz
4 kHz 2 kHz 1 kHz
kHz
Measurement Points Adjustment Value
LINE OUT
3000 Hz ±10Hz
(L, R ch)
(AF Assy)
Measurement Adjustment
Points Value
LINE OUT
Max. Playback
(L, R ch)
signal level
(AF Assy)
12.5k
10k
3dB 4dB
12.5k
10k
5dB
3dB
–20 dB
500 250 125
63 Hz 40 Hz
Hz Hz Hz
Remarks
FWD adjustment
REV Confirmation
( 3000 Hz ± 40Hz )
Remarks
After adjustment, apply silicon
bond to the head azimuth
adjustment screw.