Jvc KD 2 Service Manual

Page 1

JVE'.

I"(BEL-zA/B/C/E/J/u

PORTABLE STEREO CASSETTE DECK

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KD-2A/B/C/E/J/U

Contents

Page
Specifications ........................... 2
Features ............................... 3
Controls and Connections ..................... 3
Main parts Location ....................... 4
Main Parts Removing
Enclosure Assembly ..................... 5
Electrical Parts ......................... 6
Mechanical Parts ....................... 7
Main Adjustments
Electrical Adjustment .................... 8
Mechanical Adjustment .................... 12
Maintenance ............................. 14
Block Diagram ............................ 15

Specifications

Type Portable stereo cassette deck
Track system 4-track, 2-channel
Cassettes C-30, C-60, C-90
Tape speed 4.8cm/sec
Frequency response
Chrome *1 25~18,000Hz (Nominal)
30~16,000Hz (Typical)
Regular *2 25~17,000Hz (Nominal)

3015,000Hz (Typical)
Supasses DIN 45500
*1 TP-18 or Equivalent
*2 0P-12 or Equivalent
57dB (from peak level, weighted)
The S/N is improved by 5dB at
IkHz and by 10dB above 5kHz
with ANRS on.
62dB with ANRS
(DIN 45500, weighted)
Effect of Super ANRS (Normal tape)
Improvement of
Signal-to-Noise ratio .
Improvement of
frequency response

Signal-to-Noise ratio

the same as with ANRS

DVU recording; GdB at 10kHz
+5VU recording; 12dB at 10kHz
Improvement of
distortion OVU recording; 3% or less at 10kHz
+5dB recording; 3% or less at 10kHz
0.09% (WRMS)

0.20% (DIN 45511)

Wow and flutter

Separation 35dB
Harmonic distortion 1.2% (Normal tape 1kHz, OVU)
Bias AC bias (95kHz)
Erasure AC erasure
Heads 2 heads
SA head for recording/playback
and ferrite head for erasure
Motor DC coreless motor

2 x 30 minutes with the

C-60 cassette

Less than 90 sec (with the 0-60
cassette)

Recording time

Fast FonNard time

Page

Circuit Board Parts

Main Amp Circuit Board Parts List ............ 1G

REC Amp Circuit Board ................... 20

ANRS Circuit Board ...................... 22
Mechanical Component (1) ................... 25
Mechanical Component (2) ................... 26
Mechanical Component List ................... 27
Enclosure Ass'y and Electrical Parts

Except Circuit Board Parts (1) ................ 29

Except Circuit Board Parts (2) ................ 30
Wiring ................................... 32
Standard Schematic Diagram .................. 33
Accessories .............................. 35
Packing ................................ 36
Rewind time Less than 90 sec (with the C-60

cassette) per track
IC: 4, Transistor; 37,
Diodes; 25, SCR;1
Mic jack; 2
Max. sensitivity; 0.2mV (-72st)
Matching impedance;
600$} (200Sl~2k§l)
Input jack; 2
Max. sensitivity; 78mV (-20st)
Input impedance; 100kfl
Output jack; 2
Output level; 500mV (fixed)
Output impedance; 2.5kQ
Matching impendnce;
50kt? or more
Headphone jack; 1
Output level; 0.75mW
Matching impedance; 852
Min. input level; 0.2mV/k52
Input impedance; 2.2kQ
Output level; 500mV
Output impedance; 2.5kfl
Matching load impedance;
SOkSZ or more
DC 6V ("D" size CELL x 4)
External DC power; 6V
AC power;
120V, 60Hz for KD-ZJ/C
120/220/240V, 50Hz for
KD-2A/B/E
100V,115V 230V
50/60Hz for KD-2U
5.5W (KD-2J/C) 6W (KD-2A/B/E/Ul

Semiconductors

Input jacks

Output jacks

Recording connector
(REC/PB)

Power supply

Power consumption

Battery life Approx. 6 hours of continuous
recording (on super type batteries)
Dimensions 10-7/8 (width) x 3-3/4 (height)
x 11-3/8 (depth) in.
Weight 8.8 lbs. (including 4 batteries)

Design and specifications are subject to change without notice.

No.4151 _2 7

Page 29

Enclosure Assembly and Electrical Parts Except Circuit Board Parts (1)