JVC KD-21 - Page 2

KD-21A/B/E/U |
KD-15A/B/C/E/J/U
This manual contains all you need to know about the new KD-15/KD-21 cassette decks.
Operation and facilities provided the two models are the same except for the meter grille employed on
the KD-15.
Contents
Page
Specifications
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Features
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Controls
and
Connections
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Main
Parts
Location.
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Main
Parts
Removing
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Enclosure
assembly
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Electrical
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Mechanical
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Main
Adjustments
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Trouble
Shooting
Guide
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Maintenance
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Specifications
Type
Stereo
cassette
deck
Track
system
4-track,
2-channel
Cassettes
:
C-30,
C-60,
C-90
Frequency
response
Chrome *1 : 20 — 16,000Hz (Nominal)
30 — 15,000Hz (Typical)
Regular *2 20 — 15,000Hz (Nominal)
Signal-to-Noise ratio :
Wow and flutter
Crosstalk
Bias
Erasure
Heads
Motor
Tape speed
Recording time
Fast forward time
Rewind time
Semiconductors
No. 4150
Harmonic distortion :
30 — 14,000Hz (Typical)
Surpasses DIN 45500
52dB (JIS)
The S/N is improved by 5dB at
1kHz and by 10dB above 5kHz
with Dolby N.R.
62dB with Dolby N.R.
(DIN 45500 weighted)
0.1% (WRMS)
0.20% (DIN 45511)
65dB
1.3% (normal tape)
AC bias (95kHz)
AC erasure
2 heads
Hard permalloy head for
recording/playback and
ferrite head for erasure
Electronically governed DC
motor
4.8cm/sec.
2 x 30 minutes with C-60
cassette
100 sec., with C-60 cassette
100 sec., with C-60 cassette
5 1Cs, 20 transistors, and
29 diodes
Page
Block Diagram ....... 0.00 e cece ee ence eee 13
Standard Schematic Diagram ...............0000005 15
WING) ace ieoncetese oe ead ced naire dR AR R08 Sadie th ace aee 16
Circuit Board Parts List ........... 2c cee ee 17
Circuit Board Parts ......... 00.2 c ee eee eens 21
Mechanical Component List .............00000eees 23
Mechanical Component .............2200ceeeeaeee 25
Enclosure Assembly and Electrical Parts
Except Circuit Board Parts ........... 000 eee eeees 26
Pack ing: 25. veaicraie ed aiere: Gee Ae a ea tie eee oes 29
ACCOSSOFIES: iio dit insta abd Cae aa wea a Wd Vea 29
Mic jack x 2
Max. sensitivity 0.2mV
Matching impedance
6002 — 10k
Input jack x 2
Min. input level 80mV
Input impedance 100kQ
Output jack x 2
Output level;0.42V
Output impedance; 3.5kQ
Matching load impedance
50kQ or more
Headphone jack x 1
Output level 0.3mW
Matching impedance
BQ. — 1kQ
Min. input level 30mV/kQ
Input impedance 8kQ
Output level; 0.42V
Output impedance; 3.5kQ
Matching impedance 50kQ
or more
AC 120V, 60Hz (KD-15C/J)
AC120V, 220V, 240V, 50/60Hz
(KD-21A/B/E, KD-15A/B/E)
AC100V, 120V,200V,220V,
Input jacks
Output jacks
DIN connector
Power requirement
50/60Hz (KD-21U, KD-15U)
Power consumption : 15W
Dimensions : Width; 15- 3/8” (390mm)
Height; 6- 1/4" (157mm)
Depth; 10-1/4"" (259mm)
Weight 9.9 Ibs. (4.5kg)
Pl ssica BASF TP-18 or Equivalent
hs eae BASF OP-12 or Equivalent
Design and specifications are subject to change without notice.