Pioneer CT-S670D, Руководство по обслуживанию

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CT-S670D
30
6. ADJUSTMENT
Adjustment points and Measurement points are shown in Fig. 6–5.
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. 6–1 Constants of the Test Tape STD–331E
List of Adjustments
Playback Section
(1) Head Azimuth Adjustment
(2) Playback Level Adjustment
Recording Section
(1) Bias Oscillator Adjustment
(2) Recording Bias and Recording Level Automatic Adjustment
NOTE: This unit has an automatic tape selection feature.
Mode Test Tape Adjusting Point
Specifications/Ratings
(Playback Frequency)
Remarks
PLAY NCT-111 (3kHz) Capstan Motor
3000Hz ± 5Hz
6.1 MECHANICAL ADJUSTMENT
Tape Speed Adjustment
6.2 ELECTRICAL ADJUSTMENT
Adjustment Conditions
(1) The mechanical adjustments must be completed first.
(2) The head must be cleaned and demagnetized.
(3) Turn the power on allow the deck to warm up for at least a few
minutes before commencing any electrical adjustments.
(4) The reference signal is 0 dBV = 1 Vrms.
(5) Connect a10 k
Ω
load resistance to the OUTPUT terminals.
(6) Unless otherwise specified, the switches listed below are left in
the positions indicated.
DOLBY NR
: OFF
DIGITAL NR : OFF
Test Tape
STD–331E : Playback adjustment (See Fig. 6–1)
STD–632 : NORMAL blank tape
STD–622 : CrO2 blank tape
STD–611 : METAL blank tape
∗
As the reference recording level is 250 nwb/m for STD–331E,
the recording level will be higher by 4 dB for STD–331B
(160nwb/m). When adjusting, pay careful attention to the type
of tape used.
Note) Always use a ceramic screwdriver
for adjustment.
Dolby noise reduction and HX Pro headroom extension manufactured
under license from Dolby Laboratories Licensing Corporation. HX Pro
originated by Bang & Olufsen.
“DOLBY”, the double-D symbol and “HX PRO” are trademarks of Dolby
Laboratories Licensing Corporation.