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Quality scan of the original. All the detail necessary to troubleshoot, repair and adjust the unit. I'm sure I will be downloading more manuals in the future as the need arises.
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Exactly as described, a Service Manual complete with the schematics and PCB layout delivered in a timely manner. Many thanks for the great service.
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some of the writing is a bit blur but the part in the schmatic was great and i have fixed the machine thanks
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Well.. I'd searched for this manual and although I found many copies online I was pleased to find your website with a well balanced pricing system and easy to search and follow links. That together with the very quick response time was just what I was looking for.. being a very impatient tech.. ;-) I had the service manual in front of me within a short time.
Bookmarked.. and you can bet I will always come here first for my service & user manuals..
best regards
Ed(Tony) Foley
G7WHK
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I will definitely be back for more information when I need it.
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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