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Very useful Service Manual! With it I was able to identify the damaged pots in my old amplifier, purchase the adequate replacements and make myself the repair.
I have again my old amplifier, still a very good one that I will keep for as many years as I can!
Thanks to Owner Manuals!
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Good price for the manual and easy to locate on the site and download. Plus, just like the original. Thanks a lot.
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Genuine Service Manual. Link was available in less then an hour or so. Service Manual contains assembly, PCB layout, complete circuit diagram, Components list etc
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Great and very well scanned Service Manual, also very fast download - Recomended !
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I'm quite impressed. I had to wait 24 hours for my manual (quite a rare one) but I got it and the quality was good. Also, from trawling the web, these prices are by far the best.
HCD-EC70 SECTION 4 MECHANICAL ADJUSTMENTS
� Precaution 1. Clean the following parts with a denatured-alcohol-moistened swab : record/playback head pinch roller erase head rubber belts capstan idlers 2. Demagnetize the record/playback head with a head demagnetizer. (Do not bring the head magnetizer close to the erase head.) 3. Do not use a magnetized screwdriver for the adjustments. 4. After the adjustments, appiy suitable locking compound to the parts adjusted. 5. The adjustments should be performed with the rated power supply voltage unless otherwise noted. � Torque Measurement
Mode FWD FWD back tension FF Torque meter CQ-102AS Meter reading 2.0 � 8.0 mN � m (20 to 80 g � cm) (0.28 � 1.12 oz � inch) 0.15 � 0.6 mN � m (1.5 to 6 g � cm) (0.021 � 0.083 oz � inch) 5 � 17.7 mN � m (50 to 177 g � cm) (0.7 � 2.48 oz � inch) 5 � 17.7 mN � m (50 to 177 g � cm) (0.7 � 2.48 oz � inch)
SECTION 5 ELECTRICAL ADJUSTMENTS
DECK SECTION 0 dB=0.775 V
1. Demagnetize the record/playback head with a head demagnetizer. 2. Do not use a magnetized screwdriver for the adjustments. � Test Tape
Tape P-4-A063 Signal 6.3 kHz, -10 dB Used for Azimuth Adjustment
RECORD/PLAYBACK HEAD AZIMUTH ADJUSTMENT
Procedure: 1. Mode: Playback
test tape P-4-A063 (6.3 kHz, �10 dB) JACK board PHONES jack (J102) level meter set + �
CQ-102C
CQ-201AS
REW
CQ-201B
2. Turn the adjustment screw and check output peaks. If the peaks do not match for L-CH and R-CH, turn the adjustment screw so that outputs match within 1dB of peak.
� Tape Tension Measurement
Mode FWD Tension Meter CQ-403A Meter Reading more than 80 g (more than 2.82 oz)
L-CH peak Output level
within 1dB within 1dB
Screw position
R-CH peak L-CH peak R-CH peak
Screw position
3. Mode: Playback
test tape P-4-A063 JACK board (6.3 kHz, �10 dB) PHONES jack oscilloscope (J102) V set H
waveform of oscilloscope
in phase 45° good
90° 135° 180° wrong
4. After the adjustments, apply suitable locking compound to the pats adjusted.
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