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Contents
Page
Specifications
........
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F@atu res
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Controls and Connections
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Main Parts Removing..............2000eeeeeees
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Enclosure Assembly
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Electrical Parts 2.5.02.
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Mechanical Parts ..............0000
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Main Adjustments
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Trouble Shooting Guide
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Maintenance
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Block Diagram...
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14
Specifications
Type
Stereo cassette deck
Track system
4-track, 2-channel
Cassettes
C-30, C-60, C-90
Frequency response
:
Signal-to-Noise ratio :
Effect of Super
ANRS
Improvement of
S/N
:
Improvement of fre-
quency response
:
Imrpovement of
distortion
Wow and flutter
Crosstalk
Harmonic distortion :
Bias
z
Chrome *1 20 — 18,000Hz
(Nominal)
30 — 16,000Hz
(Typical)
Regular *2 20 — 17,000Hz
(Nominal)
30 — 15,000Hz
(Typical)
Supasses
DIN 45500
*1 TP-18 or Equivalent
*2 QP-12 or Equivalent
56dB(JIS)
The S/N is improved by
5dB at 1kHz and by
10dB above 5kHz with
ANRS on
62dB with ANRS
(DIN45500 weighted)
(normal tape)
the same as with ANRS
OVU recording; 6dB at 10kHz
+5VU recording; 12dB at 10kHz
OVU recording; 3% less at 10kHz
0.05% (WRMS)
0.18% (DIN45500)
65dB
1.2% (normal tape)
AC bias (95kHz)
Page
Wiring
S622
Hit
eta
bt
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Standard Schematic Diagram...............20005
16
Circuit Board Parts
............02
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Main Amp Circuit Board. ...........
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ANRS Circuit Board ...............00000euee
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Switch Circuit Board
..........
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Mechanical Component ..............00000eeeas
26
Enclosure Ass'y and Electrical Parts
except Circuit Board Parts .............0.0000.
32
ACCOSSOFICS
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34
Pack ing 220i esavaretag ates GA ato iis Ge ahs Ae
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35
Erasure
AC erasure
Heads
Recording/playback
Motor
Tape speed
Recording time
Fast forward time
Rewind time
Semiconductors
Input jacks
Output jacks
Power requirement
Power consumption
:
= Sen-Alloy head
Erasure = Ferrite head
Frequency control DC servomotor
4.8cm/sec
2 x 30 minutes with C-60 cassette
75sec with C-60 cassette
75sec with C-60 cassette
6 ICs
40 transistors
2 SCR and 30 diodes
MIC jack x 2
Max. sensitivity 0.2mV
Matching impedance 6002
Input jack x 2
Min, input level 78mV
Input impedance 1002
Output jack x 2
Output level 0~ 0.5V
Output impedance 10k
Matching load impedance 6.8ka
or more
Headphone jack x 1
Output level 0.3mV
Matching impedance 6.8k9 or more
AC 120V, 60Hz (CD-1770/C)
AC 240V, 50Hz (CD-1770A/B)
AC 220V, 50Hz (CD-1770E)
30W
Dimensions
Width 16-1/2"' (420mm)
Height 3-1/2' ( 88mm)
Depth 10-7/8"" (277mm)
Weight
12.1 Ibs (5.5 kg)
Design and
specifications are subject
to change without notice.
CD-1770/A/B/C/E
a
ee
m
No. 4144
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