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The manual is well organized and is easy to read. The chapters are following normal way to proceed.
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This scanned manual is well done in that most all the pages except for one is straight and clear- the way I would do them. One page was upside down but that happens. For the money that is charged on this site you get a pretty good deal. Now with complex repairs, I still prefer to us paper manuals which I have to buy at stereomanuals but the one I got here was much less than the $45 he was charging but this is a larger than normal manual for three different units. I am a picky manual user because I have used original manuals from Sony and Teac.
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Very useful service manual, was exactly what i needed.Good quality,reasonable price.Thank you.
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Acurate informations inside the SM and I could repair my old Sansui SC-3330 without any problems. Thanks.
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I used it to repair a NAD 7030, but unfortunately, the 7045 is different !
But documentation was useful.
XR-A670, XR-A370
6.2.2 For XR-A370
� Adjustment points and test points are shown in Fig.10, Fig.12 and Fig.13.
Mechanical Adjustment
� Test tape : NCT-111 (3kHz, 30min).
1. Tape Speed Adjustment
No. Mode Test Tape Adjusting Points Measurement Points
TAPE TEST POINT (Rch) (AF Assy)
Adjustment Procedure
Press the PLAY SW and adjust so that the reading becomes 3000Hz ± 20Hz. Confirm that wow & flutter level is below 0.3% (in the reverse direction, confirm that the reading is within 3000Hz ± 60Hz).
Remarks
1
Deck � PLAY
ADJ. VR on NCT-111 CASSETTE (Playback : 3kHz) MECHA (Fig. 10)
Tape Speed ADJ. VR AF Assy Front Side Cassette Mechanism Section (Side View)
Fig.10 Tape Speed ADJ. Point
Electrical Adjustment
Check the following before starting.
(1) Confirm that the tape speed adjustment has been completed. (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. STD-331E : For playback check STD-632 : Normal blank tape (5) Provide yourself with the following measuring devides: � AC voltmeter (Noisemeter : filter off) � AC millivoltmeter � Low-frequency oscillator � Attenuator � Oscilloscope (6) Adjust both right and left channels unless otherwise specified. (7) 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. (8) Always follow the indicated adjustment order. Otherwise, a complete adjustment may not be achieved.
Playback Adjustment (Decks � and ��)
(1) Head Azimuth Adjustment
Recording Adjustment (Deck �)
(1) Bias Oscillation Frequency Adjustment (2) Recording Bias Adjustment � As the reference recording level is 250nwb/m for STD-331E, the recording level will be higher by 4 dB for STD-331B (160nwb/m). When adjusting, pay carefull attention to the type of tape used.
0 dB 30s 315Hz
0 dB: 315 Hz, 250 nwb/m 30s 6.3kHz 30s 10kHz 30s 315Hz 10s ......................................................................................................... 10s �20 dB 12.5 6.3 500 250 125 14kHz kHz 10kHz 8kHz kHz 4kHz 2kHz 1kHz Hz Hz Hz 63Hz 40Hz 10s
Fig.11 STD-331E Test Tape 63
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