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XR-A660, XR-A330
Recording Adjustment
(1) Bias Oscillation Frequency Adjustment
Step Mode Input Signal/ Test Tape Load the STD-632 test tape and set the recording mode. Adjusting Points Deck II DECK I    L2801 (AF Assy) Measurement Points    Between A point in Fig.7 and GND. Adjustment Value Oscillation frequency to be 105.0kHz ± 2kHz. Remarks If the REC/STOP button for four seconds while the power is in STAND BY mode, the frequency will decrease 2 to 3 kHz.
1
REC
(2) Recording Bias Adjustment
� Since this adjustment affects recording bias, prevent distortion from increasing due to underbias.
Step Mode Input Signal/Test Tape Input a 315Hz signal to the AUX terminal and set the input selector to AUX. Adjusting Points Deck II DECK I Deck II DECK I    Input signal level    VR2801(Lch) VR2802(Rch) Measurement Points TAPE TEST POINT (L, Rch) (AF Assy) TAPE TEST POINT (L, Rch) (AF Assy) Adjustment Value Remarks
1
REC
� 23.7dBV
2
Load the STD-632 test tape and REC � record/playback the 315Hz and PLAY 10kHz signals. (see the Note below)
Repeat adjustment until playback level of the 10kHz signal is within 0 ± 0.5dB from that of the 315Hz signal.
Note : Set the 10kHz input signal level to the same value as the 315Hz input signal level of step 1.
(3) Recording Level Adjustment
Step Mode Input Signal/Test Tape Input a 315Hz signal to the AUX terminal and set the input selector to AUX. Adjusting Points Deck II Input signal level DECK I Deck II DECK I    VR2301(Lch) VR2302(Rch) Measurement Points TAPE TEST POINT (L, Rch) (AF Assy) TAPE TEST POINT (L, Rch) (AF Assy) Adjustment Value Remarks
1
REC
�
7.7dBV
2
Load the STD-632 test tape and REC � record/playback the 315Hz PLAY signal.
Repeat recording, playback and adjustment until playback level of the 315Hz signal becomes � 7.7dBV.
(4) ALC Operation Check
Step 1 2 REC/ PAUSE Mode Input Signal/Test Tape Input a 315Hz signal to the AUX terminal and set the input selector to AUX. Adjusting Points Input signal level Set to a level +10dB adove the input level at step1. Measurement Points TAPE TEST POINT (L, Rch) (AF Assy) Adjustment Value � 8.2dBV Confirm that the reading is � 2.2 ± 2.5dBV. Remarks
56
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