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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.
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The service manual when downloaded and printed out was clear and easy to read. I would have liked to have been able to enlarge some details, but this was not possible as the file permissions did not allow this. The service was very good. The time taken from placing my order to downloading the document was only a few minutes.
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The manual is useful for trouble shooting for an old instrument. It saved money,and let me enjoy DIY.
M-640V/645V/647V SECTION 3 MECHANICAL ADJUSTMENTS
PRECAUTION
1. Clean the following parts with a denatured-alcohol-moistened swab : record/playback/erase head pinch roller rubber belts capstan 2. Demagnetize the record/playback/erase head with a head demagnetizer. 3. Do not use a magnetized screwdriver for the adjustments. 4. The adjustments should be performed with the rated power supply voltage unless otherwise noted. Power supply voltage: 3 Vdc TAPE SPEED switch : 2.4 cm Torque Measurement
Mode Forward Fast Forward Torque Meter CQ-103M CQ-201M Meter Reading 0.49 � 1.27 mN � m (5 � 13 g � cm) (0.07 � 0.180 oz � inch) more than 2.95 mN � m (more than 30 g � cm) (more than 0.42 oz � inch) Rewind CQ-201M more than 2.95 mN � m (more than 30 g � cm) (more than 0.42 oz � inch)
SECTION 4 ELECTRICAL ADJUSTMENTS
Specified voltage: 3 V (DC) Test Tape
Type S-2-A030 WS-24 WS-12 Signal 3 kHz, � 20 dB 3 kHz, � 10 dB Used for Head Azimuth Adjustment Tape Speed Adjustment Tape Speed (cm/s) 2.4 2.4 1.2
Record/Playback/Erase Head Azimuth Adjustment
Setting: [VOL] control : mechanical mid [TAPE SPEED] switch : 2.4 cm/s [VOR] switch : OFF Procedure: 1. Mode: Playback
test tape S-2-A030 (3 kHz, �20 dB) set
level meter 16 � + �
Tape Tension Measurement
Mode Forward Tension Meter CQ-403M Meter Reading more than 20 g (more than 0.28 oz)
[EAR] jack (J101)
2. Turn the head azimuth adjustment screw to obtain the maximum reading on level meter.
Note: Several peaks may appear, but the maximum.
Adjustment Location: First remove the cover (AZ).
Remove the cover (AZ).
head azimuth adjustment screw
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$4.99 M-645V SONY Owner's Manual Complete owner's manual in digital format. The manual will be available for download as PDF file aft…
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