JVC KD-A66 Service Manual

No. 4193
KD-A66A/B/C/E/J/U |
Contents
Page
Specifications... 0... ee es 2
FOQtUFOS ape cnt id ean erate bos ah A a ei ee ea ea ee 3
Controls and Connections... ......-----00 ee ee eee 3
Main Parts Location... ...... 2.002: eee ee eee 4
Description on New Technology. ..........--+-+---- 5
Maintenance. ....... 00 eee eee eee ee eee 10
Removal of the Main Parts ......-...0202000000 10
Main Adjustments ........ 200002 eee eee ee ee 13
Block Diagram 2.0... et 20
Instruction of ICs 2... ee ee 22
Standard Schematic Diagram
(Main Amp Circuit)... ....0..0 0000. eee eee 23
(Mechanical Control Circuit)... .........2005. 24
(Computer Circuit)... 2... 2.0.00 ce eee oe tess 25
Specifications
Type : Component stereo cassette deck
Track system : 4-track, 2-channel
Tape speed : 1-7/8 inch/sec (4.8 cm/sec)
Frequency response :
(-20 VU recording)
Metal tape *1 515 — 18,000Hz
25 — 16,000Hz (+3dB)
SA/Chrome tape “2 15— 18,000Hz
25 — 16,000Hz (+3dB)
SF/Normal tape *~3 15 — 17,000Hz
25 — 15,000Hz (+3dB)
(O VU recording)
Metal tape
SA/Chrome tape
SF/Normal tape
25 — 12,500Hz (+3dB)
25 —.8,000Hz (+3dB)
25 —8,000Hz (+3dB)
Frequency response when using the
computer B.E.S.T. tuning system
(~20 VU recording)
Metal tape
SA/Chrome tape
SF/Normal tape
40 — 12,500Hz (+1dB)
40 — 12,500Hz (+1dB)
40 — 12,500Hz (+1dB)
Those values are almost the same for
all types of tapes when the computer
B.E.S.T. tuning system is used.
Note: *1..... SCOTCH METAFINE or Equivalent
AD, TDK SA or Equivalent
Ec ie MAXELL UD or Equivalent
S/N ratio : 60dB (from peak level, weighted,
Metal tape)
The S/N is improved by 5dB at 1 kHz
and by 10dB above 5kHz with ANRS
on.
(DIN 45 500 weighted)
Effect of Super ANRS :
(Normal tape) Improvement of S/N:
the same as with ANRS
Improvement of frequency response:
0 VU recording; 6dB 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
10kHz
Wow and flutter : 0.04% (WRMS),
0.14% (DIN 45 500)
Page
Wiring. (1): (3) sins ON BS ee ea ee ae VS 26 ~28
Enclosure Assembly and Electrical Parts List ...... 30
Enclosure Assembly and Electrical Parts ........... 33
Mechanical Component Parts.............0.005- 34
Mechanical Component Parts List.............- 35
Main Amp P.W. Board Parts... ..... 2.000002 ee 37
Computer P.W.B., Mechanical Control P.W.B........ 38
Main Amp P.W. Board Parts List............... 39
Computer P.W. Board Parts List..............4. 42
Mecha Control P.W. Board Parts... ..........0055 45
Mecha Control P.W. Board Parts List............- 46
Other P.W. Board Parts... 0... 0. cee ee es 47
Other P.W. Board Parts List.......-....000005 48
Packing, Packing Material List, Accessories.......... 49
: 65dB (1kHz)
K3;0.4%, THD; 1.0%
(metal tape, 1kHz OVU)
Crosstalk
Harmonic distortion :
Bias : AC bias
Erasure : AC erasure
Heads : 2SA (Sen-Alloy) heads
X-cut head for recording and playback
2-Gap head for erasing
: Electronic governed DC motor (for
Capstan)
DC motor (for Reel)
: 85 sec. with C-60 cassette
: 85 sec. with C-60 cassette
: 18 ICs, 77 transistors, 1 FET
52 diodes, 12 LEDs
Motors
Fast forward time
Rewind time
Semiconductors
Input terminals
Mic jack x 2 ; Max. sensitivity; 0.2mV (-72dBs)
Matching impedance;
6002. ~ 10k92
Input jack x 2; Min. input level; 80mV (-20cBs)
Input impedance; 100kQ
Output terminals
Output jack x 2. ; Output level; 0 ~ 500mV
Output impedance; 5kQ2
Phones jack x 1; Output level; 0 ~ 0.5mV
Matching impedance;
BQ ~ 1kQ
: AC 240V, 50Hz (KD-A66A)
AC 120V, 60Hz
(KD-A66C/J)
AC 240/220/120V, 50/60Hz
(KD-A66B/E)
AC 240/220/120/100V,
50/60Hz (KD-A66U)
Power consumption : 30W
Power requirement
Dimensions : 17-3/4''(450mm)W
4-5/8" (118mm)H
13” (331mm)D
(with feet, buttons, switches)
Weight : 17.4 Ibs (7.9 kg)
Design and specifications subject to change without notice.

JVC KD-A66 Specifications

General

Brand	JVC
Model	KD-A66
Category	Cassette Player
Language	English