Pioneer XR-VS200 - Page 72

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XR-VS90SW, XR-VS90, XR-VS70SW, XR-VS70
Recording Adjustment
(1) Bias Oscillation Frequency Adjustment
(2) Recording Bias Adjustment
• Since this adjustment affects recording bias, prevent distortion from increasing due to underbias.
Note : Set the 10 kHz input signal level to the same value as the 315 Hz input signal level of step 1.
Step Mode
Input Signal/
Test Tape
Adjusting Points
Measurement
Points
Adjustment
Value
Remarks
1 REC
Load the STD-632 test
tape and set the
recording mode.
Deck Ι
Oscillation
frequency to be
105.0kHz ±
2kHz.
Deck ΙΙ
L2801
(AF Assy)
Between A
point Fig. 9
and GND
Step Mode Input Signal/Test Tape Adjusting Points
Measurement
Points
Adjustment Value Remarks
1 REC
Input a 315 Hz signal to the
AUX terminal and set the input
selector to AUX.
Deck Ι
Input signal level
TAPE TEST
POINT (L, Rch)
(AF Assy)
– 23.7 dBV
2
REC →
PLAY
Load the STD-632 test tape and
record/playback the 315Hz and
10kHz signals
(see the Note below)
Deck Ι
Deck ΙΙ
TAPE TEST
POINT (L, Rch)
(AF Assy)
Repeat adjustment until playback level
of the 10kHz signal is within 0 ± 0.5 dB
from that of the 315Hz signal.
If the REC/STOP button for four
seconds while the power is in STAND
BY mode, the frequency will decrease
2 to 3 kHz.
Deck ΙΙ
VR2801 (L ch)
VR2802 (R ch)
(3) Recording Level Adjustment
Step Mode Input Signal/Test Tape Adjusting Points
Measurement
Points
Adjustment Value Remarks
1 REC
Input a 315 Hz signal to the
AUX terminal and set the input
selector to AUX.
Deck Ι
Input signal level
TAPE TEST
POINT (L, Rch)
(AF Assy)
– 7.7 dBV
2
REC →
PLAY
Load the STD-632 test tape and
record/playback the 315Hz
signal.
Deck Ι
Deck ΙΙ
TAPE TEST
POINT (L, Rch)
(AF Assy)
Repeat recording, playback and
adjustment until playback level of the
315 Hz signal becomes – 7.7 dBV.
Deck ΙΙ
VR2301 (L ch)
VR2302 (R ch)
(4) ALC Operation Check
Step Mode Input Signal/Test Tape Adjusting Points
Measurement
Points
Adjustment Value Remarks
1
2
REC/
PAUSE
Input a 315 Hz signal to the
AUX terminal and set the input
selector to AUX.
Input signal level
Set to a level + 10dB above the
input level at step 1.
TAPE TEST
POINT (L, Rch)
(AF Assy)
– 8.2 dBV
Confirm that the reading is
– 2.2 ± 2.5 dBV.