KD-A77A/8/C/E/J/U
r-
Contents
Specifications
.........................................................
2
Features
..................................................................
3
Controls and Connections
..........................................
3
Main Parts Location
...................................................
4
Maintenance
............................................................
4
New
Technique
......................................................
5
Removal
of
the Main Parts
..........................................
6
Main
Adjustments
...................................................
1 0
Block Diagram
......................................................
16
Integrant Circuit
......................................................
18
Standard Schematic Diagram
of
KD-A
77
Amplifier
circuit
................................................
1 9
Mecha. control
circuit
..........................................
20
Wiring
Connection
(1
)
of
KD-A 7 7
..............................
21
Specifications
Type
Track
system
Tape speed
Frequency response
OVU
Metal
tape
SA/Cr02
tape
-20VU
Metal
tape
SA/Cr02
tape
*
1
*2
SF/Normal tape
*
3
SIN ratio
Stereo cassette
deck
4-track,
2-channel
1-7/8
inch/sec
(4.8
cm/sec)
25-12500Hz
±3dB(Typical)
25
-
8000Hz
± 3dB(Typical)
15-20000Hz
25
-1
8000Hz
± 3dB(Typical)
15-20000Hz
25-
1
8000Hz
± 3dB(Typical)
15-19000Hz
25-17000Hz
±3dB(Typical)
Surpases DIN
45
500
60dB (from peak level, weighted,
Metal tape)
The SIN 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
SIN : the same
as
with
ANRS
Improvement
of
frequency response
:
OVU
recording; 6dB
at
10kHz
+
5VU recording; 12dB at 10kHz
Improvement
of
distortion
Wow
and
flutter
Crosstalk
Hormonic
distortion
Bias
Erasure
Heads
No.4186
OVU
recording;
3 % or less
at
10kHz
+
5VU recoridng;
3 % or less at 10kHz
0.04%
(WRMS),
0.14%
(DIN
45
500)
65dB
(1
kHz)
K3;
0.4%,
THD:
1.0%
(metal tape, 1 kHz OVU)
AC bias
(85kHz)
AC erasure
(85kHz)
3 heads
SEN
ALLOY head
for
recording,
SEN
ALLOY X
cut
type
for
playback and
two-gap
SEN
ALLOY head
for
erasure
Wiring Connection (2)
of
KD-A77
..............................
22
Enclosure
Ass'y
and Electrical Parts
...........................
25
Enclosure
Ass'y
and Electrical Parts List
..................
23
Mechanical Components Parts
.................................
26
Mechanical
Components
Parts List
........................
28
Printed Wiring Board Parts
Main
Amp.
P.W. Board Parts
....................................
33
Power Supply P.W. Board Parts
.................................
34
Main
Amp.
P.
W.B
Parts List
.................................
30
Power
Supply P.W.B Parts List
..............................
35
Other
P.W.B Parts
...................................................
37
Other
P.
W.B
Parts List
.......................................
39
Packing
......................................................
Back cover
Accessories
................................................
Back cover
Motors
Fast
forward
time
Rewind
time
Semiconductors
Input terminals
Output
terminals
Power requirement
Power consumption
Dimensions
Weight
FG
type
DC
servo
motor
(for
Capstan)
DC
motor
(for
Reel)
85
sec.
with
C-60
cassette
85
sec.
with
C-60
cassette
1 8 ICs,
49
transistors,
59
diodes,
14
LEDs
Mic jack x
2,
Max. sensitivity;
0.2mV
(-72dBs)
Matching impedance;
6000-10kO
Input jack x
2,
Min. input level;
80mV
(-20dBs)
Input impedance;
100kO
Output
jack x
2,
Output
level;
0-300mV
Output
impedance; 6kO
Matching impedance:
50kO or more
Phones jack x 1,
Output
level;
0-0.5mW/SO
Matching
impedance:
80-1
kO
AC
120V,
60Hz
(KD-AnCW
AC
240/220/120V,
50/60Z
(KD-A
n
A/B/E)
AC
240/220/120/1
OOV,
50/60Hz
(KD-A77U)
36W
17-3/4"
(450
mm) W
4-3/4"
(120
mm) H
12-7/16"
(316mm)D
18.3
Ibs
(8.3
kg)
Note:
*
1 ... SCOTCH MET AFINE or Equivalent
*
2 ... TDK SA or Equivalent
*
3 ... MAXELL
UD
or Equivalent
Design and specifications are subject
to
change
without
notice.
- 2 -
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