Adjustment - Pioneer XC-IS22CD Service Manual

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6. ADJUSTMENT

For adjustment, use the stereo power amplifier (M-IS21).
6.1 DECK SECTION
6.1.1 Adjustment Condition
(1) The ground at the time of adjustment shall be W166.
(Refer to Fig. 6–3).
(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
STD-331E : For Playback adjustment
STD–632
* As the reference recording level is 250 nwb/m for STD–
331E, the recording level will be higher than 4 dB for STD–
331B (160nwb/m). When adjusting, pay carefully attention
to the type of tape used.
(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) Turn the DOLBY NR switch off unless otherwize specified.
TE
L 13942296513
(8) 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.
(9) Always follow the indicated adjustment order.
Otherwise, a complete adjustment may not be achieved.
0 dB
30s
0 dB: 315 Hz, 250 nwb/m
315 Hz
6.3 kHz
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: For Tape Speed adjustment
: Normal blank tape
30 s 30 s 30 s
10 kHz 315 Hz
Fig. 6-2 Test Tape STD– 331E
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7 List of Adjustments
¶ Playback Section
(1) Tape Speed Confirmation
(2) Head Azimuth Adjustment
(3) Playback Level Adjustment
¶ Recording Section
(1) Recording Bias Adjustment
(2) Recording Level Adjustment
PLAY BACK
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3 6 7 1 3
RECORDING
Dolby noise reduction manufactured under license from Dolby
Laboratories Licensing Corporation.
"DOLBY" and the double-D symbol are trademarks of Dolby
Laboratories Licensing Corporation.
10s 10s .......................................................................................................... 10s
12.5 6.3
14 kHz 10 kHz 8 kHz 4 kHz 2 kHz
kHz kHz
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2 9 9 4 2 8
12.5k
250 10k
3dB 3dB
1 5 0 5 8 2 9 9 4
12.5k
250 10k
3dB 3dB
Fig. 6-1 Frequency Characteristics
500 250 125
1 kHz
Hz Hz Hz
m
co
XC-IS22CD
9 9
4dB
2 8 9 9
5dB
–20 dB
63 Hz 40 Hz
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