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CT-S520, CT-S420
PLAYBACK SECTION
1. Head Azimuth Adjustment
¢ Tum VR101, 102 to mechanical center positions.
[No.| Mode |
Input signal & test tape
Adjustment location
Measuring location
Adjustment value
Play the 10 kHz/-20 dB
Head azimuth adjustment
PLAY
section of STD-331E test
screw.
[2
STOP
Lock the screw with screw lock after completing adjustment.
tape.
(See Fig. 8-4)
2. Playback Level Adjustment
* This adjustment determines the DOLBY NR level, and must be performed with great care.
[No.| Mode |
Input signal & test tape
Adjustment location
Measuring location
Adjustment value
Play the 315 Hz/0 dB
This adjustment must be
PLAY
section of the STD-331E
VR101 (Leh)
TP. 3 (Leh)
%
performed accurately for
VR102 (Reh)
TP. 4 (Reh)
'
test tape.
proper Dolby lever setting.
Maximum playback signal
LINE OUT
level.
RECORDING SECTION
1. Bias Oscillator Adjustment
Mode
input signal & test tape
Adjustment location
| Measuring location
|
location
|
Adjustment value
|
|
Adjustment value
| | Remarks |
Load the STD-610 test
2. Bias Trap Adjustment
|No.| Mode |
Input signal & test tape
Adjustment location
Measuring location
Adjustment value
Load the STD--610 test
L101 (Lch)
ae
pf ree | tape wane
input signal.
[ose
| L102 (Fich}
sug
fnmmovor
||
3. Recording Bias Adjustment
e After the adjustment, caution should be exercised so as not to become under bias by checking the distortion rate.
e | Mode |
Input signal & test tape
Adjustment location
Measuring location
Adjustment value
Apply a 315 Hz and
10 kHz signal to the line
input terminals, load the
STD-631 test tape.
REC tevel control volume
LINE OUT
Repeatedly record, playback
and adjust so that the
playback level of 10 kHz
signal becomes 0 dB + 0.5
dB when compared with the
315 Hz signal.
Record the above signal
2.
onto the STD-631 test
tape, and playback
VR601 (Lch)
VR602 (Reh)
27
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