Specification - JVC CD-1740 Service Manual

Index
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SPECHICAIONS siiseiersretos eqeting Gone peers tecw cers weterasege 2
Features sssecsaeteuse gece e sn dimeekeansome 3
The Name of Parts... cc ccccnccrecces cave sinsans 3
Main Parts Removing & Replacement ............. 4~6
Enclosure Assembly .........022eceeeeeeeees 4
Electrical Parts: ...c.c0 0 sansa eaiseanreere ae aes 5
Mechanical Parts. s.c.s:-o1e se: e:e mere to aceon serenass caress ah crash 6
Replacement and Adjustment of the Head ......... 7
PAG JUSTINGNIES: cide octets cnsso era mascemnae mee OS STs 7
Cleaning and Oiling ........ 00. cece cece eee e eens 9
Trouble Shooting .......0c02 ccc csc e cece eanes 9
Circuit Board! Parts: o..cccccscacccmeawercieeees 10~ 14
Specification
Dimensions 405mm(W) x 97mm(H) x 217mm(D)
15-15/16" 3-13/16" 8-9/16"
Weight 4.2 kg (9.2 Ibs.)
Type Stereo Cassette Deck
Track system
Usable cassettes
Frequency response
S/N ratio
Wow & flutter
Crosstalk
Channel separation
Harmonic distortion
Recording system
Erasure system
Heads
Motor
Tape speed
Recording time
4-track 2-channel
C-30, C-60, C-90
Chrome tape 30~15,000Hz
(40~ 14,000Hz+3dB)
30~ 13,000Hz
(40~ 12,000Hz+3dB)
50dB at 1kHz from peak level
without Dolby NR
5dB at 1kHz
10dB at 5kHz or more improved
with Dolby NR
0.13% (WRMS)
60dB at 1kHz
30dB at 1kHz
2% at 1kHz (reference output level)
using normal tape
AC bias 95kHz
AC erasure 95kHz
R/P ... Cronios Head
Erase.. Ferrite Head (double gap)
DC Electric governor motor
4.75cm/sec. (1-7/8inch/sec.)
60 min. for double pass (C-60)
Normal tape
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Main Circuit Board asc as.ccsem cis came anew eee 10
Power Supply Circuit Board .................. 13
Dolby NR Circuit Board ..........02 0c eee eaee 14
Mechanical Component .........--.22200ceeeeee 17
Enclosure Assembly ... 0... ccccsec0neeeswasewas 20
Electrical Parts Except Circuit Board Parts ......... 22
Wirihig: scascsececrneecstameeees Scie ee ee ewes 24
Standard Schematic Diagram ............00 sees 25
Block. Diagram <3 2:6 usjacis es eeiere exes ayaa deren e sates ears 26
Packing 25... taccceeeesr a gia Wes muwei ese ws ee es 26
JNGGESSOPIGS: © 5 saya? e a1 au.c rar esaied wie. ceeuciey ava ws eterstesmie cones 26
Fast forward time 130 sec. or less (C-60)
Rewinding time 130 sec. or less (C-60)
Semiconductors 2 1Cs
24 transistors
26 diodes
2 FETs
Input MIC x2
Max. sensitivity 0.45mV
Matching impedance 10ka
LINE x2
Min. input level 100mV
Input impedance 220k2
Output LINE x 2 0.42V
DIN connector
Power source
Power consumption :
Output impedance 1kQ
PHONES x 1 0.3mW
Matching impedance 82
Max. sensitivity 20mV
Input impedance 84kQ
Output 0.42V
Output impedance 1kQ
AC 120V, 60Hz (CD-1740)
AC 240V, 50Hz (CD-1740A/B)
AC 220V, 50Hz (CD-1740E)
AC 100V,110~ 120V,200V,
220~ 230V, 50/60Hz
(CD-1740U)
15W
Design and specifications are subject to change without notice.
CD-1740/A/B/E/U
No. 4133