Jvc KDD 4 Service Manual

Page 2

No. 4200

KD-D4A/B/C/E/J/U

Contents

Page
Specifications ............................. 2
Features ................................. 3
Controls and Connections ..................... 3
Main Parts Location ......................... 4
Maintenance .............................. 4
Removal of the Main Parts ..................... 5
Block Diagram ............................. 6
lntegrant Circuit ............................ 6
Standard Schematic Diagram of KD-D4 ............ 2
Wiring Connection .......................... 8
Main Adjustments .............. . ............ 9
Enclosure Assembly and Electrical Parts ........... 13

Specifications

Type Component stereo cassette deck
Track system 4-track, 2-channel
Tape speed 1-7/8 inch/sec (4.8 cm/secl

Frequency response:
(0 VU recording)
Metal tape *1 ;
SA/Chrome tape *2;
SF/Normal tape *3;
(-20 VU recording)
Metal tape *1 ;

30 -12,500Hz(i 3dB)
30 - 8,000HZ (i 3dB)
30 - 8,000Hz (: 3dB)

20 - 18,000Hz
(30 v16,000Hz i 3dB)
20 - 18,000Hz
(3O - 16,000HZ i SdB)
30 - 17,000HZ
(30 -15,000HZ i 3dB)

SA/Chrome tape 2;
SF/Normal tape *3;.

Surpasses DIN 45 500
Note: *1 JVC ME or Equivalent
*2 TDK SA or Equivalent
*3 MAXELL UD or Equivalent
: 60dB (from peak level, weighted,
Metal tape)
The S/N is improved by 5dB at
1kHz and by IOdB above 5kHz
with ANRS/Dolby B NR on.
(DIN 45 500 weighted)
Effect of Super AN RS : (normal tape)
Improvement of S/N the same as with ANRS
Improvement of frequency response:
0 VU recording; GdB at 10kHz
+5 VU recording; 12dB at 10kHz
Improvement of distortion:
0 VU recording; 3% or less at 10kHz
+5 VU recording; 3% or less at
IOkHz

S/ N ratio

0.05% (WRMS)

0.17% (DIN 45 500)
65dB (IkHz)

K3; 0.4% THD: 1.0%
(metal tape, 1kHz 0 VU)

Wow and flutter

Crosstalk
Harmonic distortion

Page

Mechanical Component ...................... 14
Enclosure Assembly and Electrical Parts List ...... 15
Mechanical Component Parts List ............. 17
Main P.W. Board Parts ....................... 21
Display P.W. Board Parts ..................... 22
Other P.W. Board Parts ...................... 22
Main P.W. Board Parts List .................. 22
Display P.W. Board Parts List ................ 25
Other P.W. Board Parts List ................. 26
Accessories .............................. 27
Packing ........................... Back cover
Packing Material Parts List ............ Back cover

Bias : AC bias

Erasure ' AC erasure

Heads METAPERM head for recording/
playback, 2-gap Ferrite head for
erasure

Motor Electronic governed DC motor

Fast forward time 105 sec or less with C~60 cassette

Rewind time 105 sec or less with 060 cassette

21 ICs, 30 transistors, 39 diodes, 4
LEDs

Semiconductors

Input terminals
Mic jack x 2 Max sensitivity; 0.2mV (~72st)

Matching impedance; 6009, - 10k§2

Min. input level; 80mV (-20st)

Input impedance; lOOkQ

Input jack x 2

Output terminals
Output jack x 2 Output level; 300mV

Output impedance; 5k§2

Output level; 0.3mV (89)

Matching impedance; 89 - IkSZ

Min. input level;

0.1 mV/kS'l

Input impedance; IOKQ

Output level; 300 mV

Output impedance; 5kQ

Matching impedance;

50k§2 or more

AC 120V, 60Hz (KD-D4C/J)

AC 240/220/120V, 50/60Hz
(KD-D4A/B/El

AC 240/220/120/100V, 50/60Hz

Phones jack x 1

DIN socket

Power requirement:

(KD-D4U)
Power consumption 17W
Dimensions 161/2 (420mm)W
41/2" (115mm)H
9 7/8" (250mmlD
Weight 10.6 lbs (4.8 kg)

Design and specifications are subject to change without notice.

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