Akai 4000DS Mk-II User manual
SERVICE
mrnilML
STEREO
TAPE
DECK
MODEL
4000DS
SECTION
1
SERVICE
MANUAL
.
2
SECTION
2
PARTS
LIST
.
17
SECTION
3
SCHEMATIC
DIAGRAM.
36
SECTION
1
SERVICE
MANUAL
TABLE
OF
CONTENTS
I.
SPECIFICATIONS
.
3
II.
MEASURING
METHOD
.
4
III.
DISMANTLING
OF
TAPE
TRANSPORT
UNIT
&
AMPLIFIERS
.
6
IV.
MECHANISM
ADJUSTMENTS
.
8
V.
HEAD
ADJUSTMENTS
.I
I
VI.
AMPLIFIER
ADJUSTMENTS
.1
2
VII.
COMPOSITE
VIEWS
OF
COMPONENTS.14
I.
SPECIFICATIONS
An
asterisk
next
to
a
figure
indicates
the
minimum
guaranteed
performance.
TRACK
SYSTEM
REEL
CAPACITY
TAPE
SPEED
WOW
AND
FLUTTER
FREQUENCY
RESPONSE
AKA!
SRT
tape
Regular
tape
SIGNAL
TO
NOISE
RATIO
DISTORTION
CROSS
TALK
ERASE
RATIO
INPUTS
OUTPUTS
Mic
input
Line
input
Din
input
Line
output
Din
output
BIAS
FREQUENCY
_
BIAS
LEAK
HIGH
FREQUENCY
DEVIATION
RECORDING
CAPACITY
_
FAST
FORWARD
AND
REWIND
TIME
HEADS
Recording
Head
Playback
Head
Erase
Head
TRANSISTORS
DIODES
POWER
SUPPLY
POWER
CONSUMPTION
INSULATION
RESISTANCE
INSULATION
DURABILITY
DIMENSIONS
WEIGHT
4-track
2-channcI
stereo/monaural
system
_
Up
to
7"
reel
_
7-1/2
and
3-3/4
ips
±
2%
(*±3%)
Less
than
0.15%
(•0.22%)
RMS
at
7-1/2
ips
Less
than
0.20%
(*0.30%)
RMS
at
3-3/4
ips
30
to
23,000
Hz
(M0
to
22,000
Hz)
±
3
dB
at
7-1/2
ips
30
to
16,000
Hz
(M0
to
14,000
Hz)
±
3
dB
at
3-3/4
ips
30
to
20,000
Hz
(M0
to
20.000
Hz)
±
3
dB
at
7-1/2
ips
30
to
14,000
Hz
(M0
to
14.000
Hz)
±
3
dB
at
3-3/4
ips
Better
than
50
dB
at
7-1/2
ips
Better
than
48
dB
at
3-3/4
ips
Less
than
1.5%
(*2.0%)
at
7-1/2
ips
Less
than
2.5%
at
3-3/4
ips
Better
than
70
dB
(*60
dB)
monaural
Better
than
50
dB
(M5
dB)
stereo_
Better
than
70
dB
0.8
mV
Impedance
5
kft
70
mV
Impedance
150
kft
7
mV
1.228V
(4
±
1
dB)
using
a
250
Hz
“O’*
VU
recorded
tape
0.4V
105
kHz
±5%
_
Less
than
-30
VU
_
*
Within
2
dB
using
an
8,000
Hz
3-3/4
ips
recorded
tape
at
7-1/2
ips
60
min.
stereo
recording
using
a
1,200
ft.
tape
at
7-1/2
ips_
15
2/190
sec.
using
a
1,200
ft.
tape
at
60/50
Hz
4-pole
induction
I-speed
motor
Type:
SSM-1
Revolutions:
1,800/1,500
rpm.
at
60/50
Hz
_
In-line
4-track
2-channcl
recording
head
Type:
P4-I54
Gap:
1
micron
Impedance:
9512
±
15%
at
1,000
Hz
In-line
4
track
2-clianncl
playback
head
Type:
P4-I50
Gap:
I
micron
Impedance:
1,250ft
±15%
at
1,000
Hz
In-line
4-track
2-channcl
erase
head
Type:
E4-200
Gup:
0.6
mm
Impedance:
200ft
±5%
at
100
kHz
_
6.2SC458
LG
(C)
<D)
2.2SC97I
(2;
2.
2
SC87I
(K)
(!
■
*)
_
1
.
2
SCHW
4_
LD3I4I
___
2.
IN34A
I.
I
OIK-I
1.
IS339A
100
to
240V
A.(\.
50/60
Hz
120V
A60
Hz
lor
CSA/UL
Models
220V
A.C..
50
Hz
lor
CEE
model
35
W
More
Ilian
50
MA
_
_
I,
000V
A.C.
for
more
than
I
min.
duration
406
<W)
X
314
(11)
X
194
(D)
mm__
(15.9"
X
1
2.4"
X
7.6")
II.
4
kg
(25
lbs.)
2SC971
(2)
(3)
(red)
2SC1098
(L)
(M)
NOTE:
Specifications
subject
to
change
without
notice.
II.
MEASURING
METHOD
1.
T
APE
SPEED
DEVIATION
1
Frequency
4000DS
counter
Line
output
input
Fig.
1
As
shown
in
Figure
1,
connect
a
Frequency
Counter
to
the
Line
Output
of
Model
4000DS.
Take
a
frequency
counter
reading
at
the
beginning,
middle,
and
end
of
tape
winding
during
playback.
The
maximum
value
of
these
respective
readings
will
represent
tape
speed
deviation.
2.
W
OW
AND
FLUTTER
Vl/fMii
•mil
1
4
lai#
1
nr
4000DS
>Y()W
cIlKJ
I
inner
Meter
input
Line
output
Fig.
2
Method
A
As
shown
in
Fig.
2,
connect
the
Line
Output
of
Model
4000DS
to
the
Input
of
a
Wow
and
Flutter
Meter.
Use
a
3,000
Hz
pre-recorded
test
tape
and
take
a
wow
and
flutter
meter
reading
at
the
beginning,
middle,
and
end
of
tape
winding.
The
maximum
value
of
these
respective
readings
will
represent
the
wow
and
flutter.
Method
B
Supply
a
3,000
Hz
sine
wave
signal
from
an
Audio
Frequency
Oscillator
and
make
a
recording
on
a
blank
tape
at
the
beginning,
middle,
and
end
of
tape
winding.
Rewind
and
playback
tape.
Measure
wow
and
flutter
with
a
Wow
and
Flutter
Meter.
(The
wow
and
flutter
value
of
Method
B
will
be
close
to
twice
that
of
Method
A.)
3.
F
REQUENCY
RESPONSE
Audio
Frequency
ollt
Oscillator
put
f
.
4000DS
Line
input
Line
output
ATT.
<
High
Sensitivity
V.T.V.M.
Fig.
3
For
measuring
frequency
response,
connect
instru¬
ments
as
shown
in
Fig.
3
and
proceed
as
follows:
1)
Supply
a
1.000
Hz
sine
wave
to
the
Line
Input
of
Model
4000DS
from
an
Audio
Frequency
Oscil¬
lator
through
an
Attenuator.
Set
recorder
to
re¬
cording
mode
and
turn
recording
level
volume
control
to
maximum.
Adjust
Attenuator
to
obtain
a
+4
dB
V.T.V.M.
reading.
2)
Under
conditions
described
in
I)
above,
re-adjust
Attenuator
so
that
the
Line
Output
is-16
dB,
and
record
40
to
20,000
Hz
spot
frequencies.
3)
Rewind
tape
and
playback
from
the
beginning.
Take
V.T.V.M.
spot
frequency
readings
and
plot
values
on
a
graph.
NOTE:
When
measuring
frequency
response,
new
tape
should
be
used.
4.
S
IGNAL
TO
NOISE
RATIO
4000DS
High
Sensitivity
Line
output
V.T.V.M.
Fig.
4
As
shown
in
Fig.
4,
connect
a
High
Sensitivity
V.T.V.M.
to
the
Line
output
of
Model
4000DS.
Playback
a
250
Hz
“O”
VU
pre-recorded
test
tape
and
measure
the
output.
Then
remove
the
tape
and
measure
the
noise
level
under
the
same
condition.
Convert
each
of
the
measured
values
into
decibels.
5.
TOTAL
HARMONIC
DISTORTION
FACTOR
Fig.
5
Connect
the
measuring
instruments
as
shown
in
Fig.
5
and
record
a
1,000
Hz
sine
wave
signal
at
“O”
VU.
Playback
the
resultant
signal
and
measure
the
overall
distortion
factor.
Measure
the
noise
level
of
the
tape
recorder
without
the
tape.
Connect
the
Audio
Fre¬
quency
Oscillator
directly
to
the
distortion
meter
for
measurement
of
the
distortion
factor
of
the
oscilla¬
tor.
The
required
distortion
factor
can
be
obtained
from
the
results
of
the
above
measurement
by
the
following
formula:
do
=
d
-
dj
-
d2
where,
do
-
Required
distortion
factor
d
-
Overall
distortion
factor
d|
-
Noise
level
d
2
-
Distortion
factor
of
the
oscillator
NOTE:
When
measuring
the
distortion
factor,
new
tape
should
be
used.
7.
ERASE
RATIO
As
shown
in
Fig.
4,
connect
a
High
Sensitivity
V.T.V.M.
to
(he
Line
Output
of
Model
4000DS.
Playback
a
virgin
tape
and
take
a
V.T.V.M.
reading
of
the
output
level.
Next,
record
a
1,000
Hz
sine
wave
signal
at
+3
dB,
then
playback
this
recorded
signal
and
tape
a
V.T.V.M.
reading
of
the
output
level.
Next,
using
this
pre-recorded
tape,
record
under
a
non-input
condition
and
take
a
reading
of
the
noise
level
output
of
the
erased
signal
and
obtain
a
ratio
between
the
two
from
the
following
formula:
Er
=
20
log
^
(dB)
Where,
Er
-
Desired
erase
ratio
(dB)
Ep-
1,000
Hz
signal
output
level
E
2
—
Non-input
signal
recorded
level
E|
-
Virgin
tape
noise
output
level
6.
CROSS
TALK
(Cross
talk
between
the
tracks)
As
shown
in
Fig.
6,
first
record
a
1,000
Hz
sine
wave
signal
on
Track
No.
3
at
+3
VU
level.
Next,
record
under
a
non-input
condition.
Then,
playback
the
tape
on
Tracks
No.
3
and
4
through
the
B.P.F.(band
pass
filter
sensitivity
...
1:1)
and
obtain
a
ratio
between
the
two
from
the
following
formula:
C
=
20
log
(dB)
where,
C
-
Desired
cross
talk
ratio
(dB)
Eq
-
1,000
Hz
signal
output
level
E
2
-
1,000
Hz
cross
talk
level
El
-
Non-input
signal
recorded
level
III.
DISMANTLING
OF
TAPE
TRANSPORT
UNIT
&.
AMPLIFIERS
7<
5
r7
'5'
7d
&
*-3*
^’•S'
7
-3*
y
'S'
y
'S'
^
£
,*v
PINCH
WHEEL
CAP
In
case
of
trouble,
etc.
necessitating
disassembly,
please
disassemble
in
the
order
shown
in
photographs.
Re¬
assemble
in
reverse
order.
y
'S-
y
*F
y
'-s^-
c
s^
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s-
7
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1
A
f!
PAUSE
KNOf
TRACK
SELECTOR
KNOB
i
0-7
1
•
•
•
•
HEAD
COVER
r
r
±J\
—i
*
•
••
7-1
«
to
VIECHANISM
KNOBS
T?/“
I
AJ
IV.
MECHANISM
ADJUSTMENTS
1.
PINCH
WHEEL
ADJUSTMENT
It
is
important
that
the
pinch
wheel
shaft
be
kept
in
perfect
alignment
with
the
capstan
shaft.
Proper
pinch
wheel
pressure
is
between
1,000
and
1,150
grams
when
the
unit
is
operated
at
the
tape
speed
of
7'A
ips.
Any
deviation
from
this
specification
will
result
in
wow
and
flutter.
Check
pinch
wheel
pressure
with
a
spring
scale,
and
if
necessary,
adjust
the
pinch
wheel
load
spring.
Pig-
8
Fig.
9
2.
SUPPLY
REEL
SHAFT
ASSEMBLY
ADJUSTMENT
(See
Fig.
7
at
left)
Felt
clutch
material
(2)
is
used
between
the
lower
side
of
the
reel
table
base
plate
(I)
and
the
rewind
pulley
(3)
to
protect
recording
tape
from
excessive
tension
during
rewind
operation.
To
check
the
amount
of
friction
of
this
part,
install
a
5-inch
reel
with
a
60
mm
diameter
tape,
and
gently
pull
the
end
of
the
tape
upward
with
a
spring
scale.
Adjust
the
conical
spring
(4)
so
that
the
amount
of
tension
is
kept
between
400
and
500
grams.
Other
felt
clutch
material
(5)
is
attached
to
the
supply
roller
(6)
to
provide
proper
slippage
during
FWD
and
RFC
oper¬
ation.
The
procedure
for
checking
friction
of
this
part
is
the
same
as
the
foregoing,
and
between
80
and
100
grams
of
tension
gives
best
result.
Adjust
the
spring
(7)
just
under
the
supply
roller
(6).
When
the
unit
is
set
to
fast
forward
operation,
the
amount
of
friction
will
decrease
to
from
15
to
20
grams.
Check
to
see
whether
this
is
satisfactory.
If
not,
adjust
the
spring
plate
(8)
and
the
pressure
of
the
pulley.
(9).
3.
TAKE-UP
REEL
SHAFT
ASSEMBLY
ADJUSTMENT
(See
Fig.
7
at
right)
Felt
clutch
material
(2)
is
attached
to
the
bottom
side
of
the
reel
table
base
plate
(1)
so
that
the
recording
tape
will
not
stretch
during
fast
forward
operation
due
to
excessive
tension.
To
check
the
amount
of
friction
of
this
part,
install
a
5-inch
reel
with
a
60
mm
diameter
tape,
and
gently
pull
the
end
of
tape
upward
with
a
spring
scale.
Adjust
the
conical
spring
(4)
so
that
the
amount
of
tension
at
this
part
is
kept
between
400
and
500
grams.
Other
felt
clutch
material
(10)
is
attached
to
the
take-up
roller
(II).
This
is
to
provide
proper
slippage
during
FWD
or
REC
operation.
The
procedure
for
checking
friction
of
this
part
is
the
same
as
the
foregoing,
and
between
150
and
180
grams
of
friction
provides
the
best
results.
Adjust
the
spring
plate
(7)
just
under
the
take-up
roller
(II).
When
the
unit
is
set
to
rewind
operation,
the
amount
of
friction
of
this
part
will
decrease
to
from
15
to
20
grams.
Check
to
sec
whether
this
is
satisfactory.
If
not,
adjust
the
spring
(12)
and
the
pressure
of
the
set
sleeve
(13).
4.
RECORDING/PLAYBACK
CHANGING
MECHANISM
(See
Figs.
8,
9)
Turning
The
FWD/REC
knob
(N)
to
recording
posi¬
tion
causes
Lever
(a)
to
pull.
Recording
Lever
(b)
(as
illustrated
by
dotted
line),
and
the
FWD/REC
chang¬
ing
Switch
(SW-9)
is
turned
to
recording
position.
If
Lever
(a)
docs
not
pull
Lever
(b)
properly.
Changing
Switch
SW-9
will
not
operate
properly.
This
may
cause
abnormal
oscillation
and
inability
to
record.
In
this
case,
loosen
Screw
(c)
and
adjust
lever.
V.
HEAD
ADJUSTMENTS
ERASE
RECORDING
PLAYBACK
HEAD
HEAD
HEAD
•
Fig-
I
I
Since
adjustment
of
the
Meads
critically
affects
tape
recorder
performance,
it
is
essential
that
Heads
be
carefully
adjusted
with
precision
measuring
equip¬
ment
and
suitable
recorded
tape.
1.
H
EAD
HEIGHT
ADJUSTMENTS
(See
Figs.
10,
II)
1)
Erase
Head
Adjust
height
control
screws
(a),
(b)
by
turning
to
left
and
right
so
that
the
upper
edge
of
the
tape
is
0.15
mm
lower
than
the
upper
edge
of
the
erase
head
core.
2)
Recording
Head
Adjust
the
screws
(c),
(d)
by
turning
to
left
and
right
until
the
width
between
the
upper
edge
of
channel
1
head
core
and
upper
edge
of
the
tape
is
equal.
3)
Playback
Head
Adjust
the
screws
(f),
(g)
by
turning
to
left
and
right
until
the
width
between
the
upper
edge
of
channel
1
head
core
and
upper
edge
of
the
tape
is
equal.
2.
HEAD
SLANT
ADJUSTMENT
(See
Figs.
10,
11)
Adjust
the
screws
(Head
Height
control
screw)
by
turning
to
left
and
right
so
that
each
head
(Erase,
Recording
and
Playback
Head)
contacts
the
tape
surface
at
a
right
angle.
3.
HEAD
AZIMUTH
ALIGNMENT
ADJUSTMENTS
(See
Figs.
10,
II)
1)
Playback
I
lead
Playback
an
Ampex
Alignment
lest
tape
(8,000
Hz
345
ips.)
at
IVi
ips.
Adjust
screw
(h)
by
turning
to
left
and
right
until
the
various
line
outputs
are
maximum.
2)
Recording
Head
At
recording
mode,
supply
a
15.000
Hz
sine
wave
at
a
-16
dli
recording
level
an
Audio
Frequency
Oscillator
to
the
line
input
of
the
4000DS,and
set
the
monitor
switch
to
“TAPE”
position.
Then
adjust
screw
(e)
by
turning
to
left
and
right
until
the
various
line
outputs
arc
maximum.
4.
Repeat
adjustments
outlined
in
Items
1-2)
to
3,
above
2
or
3
times
to
obtain
optimum
adjusted
condition.
VI.
AMPLIFIER
ADJUSTMENTS
Fig.
12
LEFT
MIC.
VR.
VR-I
LEFT
LINE
VR.
VR-
I
RIGHT
MIC.
VR.
VR-2
EQUALIZER
SW.
SW2
RIGHT
LINE
VR
VR-2
MONITOR
SW
SW
4
TAPE
SELECTOR
SW.
SW
3
Fig.
14
H
<MLEFT
RB.
LEVEL
|
$
VR-2
(£3j
'right
pb.
level|
vR
-
2b
€3
VR-.b|Q
[RIGHT
REC.
LEVE
I*
I
vr
-'$C3
JLEFT
REC.
LEVEL
j_
5
Fig.
13
1.
PLAYBACK
LEVEL
ADJUSTMENT
(See
Figs.
12,
13,
and
14)
1)
Set
the
monitor
switch
to
“TAPE”
position
and
Equalizer
switch
to
7
Yi
ips.
2)
Connect
a
High
Sensitivity
V.T.V.M.
to
the
line
output.
3)
Playback
a
250
Hz
pre-recorded
test
tape
at
1
X
A
ips.,
and
adjust
semi-fixed
resistor
VR-2
and
VR-
2b
(20
kB)
to
obtain
a
4
dB
P.B.
level.
(VU
meter
indicates
“0”
VU)
Recording
Amplifier
Adjustment
should
be
made
only
after
Head
Adjustments
and
Playback
Ampli¬
fier
Adjustments
have
been
made.
2.
RECORDING
LEVEL
ADJUSTMENT
(See
Figs.
12,
13,
and
14)
1)
Set
the
monitor
switch
to
“TAPE”
position
and
Equalizer
switch
to
714
ips.
2)
Connect
an
Audio
Frequency
Oscillator
to
the
line
input
and
High
Sensitivity
V.T.V.M.
to
the
line
output.
3)
Load
a
Scotch-111
blank
tape
and
set
recorder
to
“REC”
mode.
4)
Supply
a
1,000
Hz
sine
wave
from
an
Audio
Frequency
Oscillator
and
adjust
the
line
recording
level
control
volumes
(VR-1
and
VR-2
50
kB)
until
the
line
output
level
reaches
4
dB.
(VU
meter
indicates
“O”
VU)
5)
Set
the
monitor
switch
to
“SOURCE”
position.
6)
Adjust
semi-fixed
resistor
VR-1
and
VR-lb
(2
kB)
to
obtain
4
dB
recording
level.
(VU
meter
in¬
dicates
“O”
VU)
7)
Repeat
2
times
in
the
same
way
as
indicated
in
Items
4)
to
6)
above.
Fig.
15
V.
T.
V.
M.
FREQUENCY
COUNTER
GROUND
3.
RECORDING
BIAS
FREQUENCY
ADJUSTMENT
(See
Fig.
16)
1)
Set
the
recorder
to
recording
mode.
2)
Connect
a
Frequency
counter
to
points
(A)
and
(C)
in
Fig.
16
of
the
oscillator
P.C.
Board
(LE-5021)
and
read
the
frequency
indication.
3)
If
the
bias
frequency
is
105
kHz
±5%,
the
bias
frequency
is
correct.
4)
If
the
bias
frequency
is
incorrect,
it
can
be
adjust¬
ed
by
changing
the
value
of
condenser
C8
(5600
PF)
of
the
oscillator
P.C.
Board
(LE-5021)
4.
RECORDING
BIAS
VOLTAGE
ADJUST¬
MENT
(FREQUENCY
RESPONSE
ADJUSTMENT)
(See
Figs.
15,
16)
1)
Set
the
monitor
switch
to
“TAPE”
position
and
equalizer
switch
to
Vh
ips.
2)
Connect
an
Audio
Frequency
Oscillator
to
the
line
input
through
an
Attenuator
and
a
High
Sensiti¬
vity
V.T.V.M.
to
the
line
output.
3)
Load
a
blank
test
tape
“AKAI
100L”
(Fuji
S-100)
and
set
the
recorder
to
“REC”
mode.
4)
Turn
recording
level
control
volume
VR-1
and
VR-2
(50k
A)
to
obtain 4
dB
V.T.V.M.
reading.
5)
Under
conditions
described
in
Item
4)
above,
readjust
attenuator
so
that
the
line
output
level
is
-16
dB.
6)
Record
from
40
to
20,000
Hz
spot
frequencies.
7)
Adjust
Bias
Adjustment
semi-fixed
condenser
C6
(70
PF
max.)
so
that
the
output
of
1,000
Hz
and
15,000
Hz
frequencies
are
equal.
8)
The
bias
voltage
at
this
time
is
around
1
IV
A.C.
5.
ERASE
VOLTAGE
1)
Set
the
recorder
to
“REC”
mode.
2)
Connect
a
V.T.V.M.
to
points
(B)
and
(C)
in
Fig.
16
of
the
oscillator
P.C.
Board
(LE-5021)
and
read
the
V.T.V.M.
indication.
3)
The
Erase
Voltage
is
around
52V
A.C.
Fig.
16
VII.
COMPOSITE
VIEWS
OF
COMPONENTS
PRE-AMP.
P.C.
BOARD
(LE-5022)
TO
CHASSIS!
8LK
raw
j
gRBjwa
FROM
J6
WWT
WHT
70
EO
SW(SW2)
TO
MONITOR
SW
(SW
4)
—®fL
FROM
M0Nrr0RSW(SW4)
TO
STEREO
HEA^
jg
TO
LEFT
‘SW
08
TO
LEFT*
VU
METER
‘misvzmtm
.aJ
r*.
'2
3S5
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•**«£
YUT/GRN
fMFWjf
J:
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ui.'
1
WHT
t
K
<»pp
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M.'
-vSl
«£,*.
1
c
:
-
FROM
J6
TO
MONITOR
SW
(SW4)
TO
EO
SW
(SW2)
FROM
MONITOR
SW
(SW4)
TO
STEREO
jg
TO
R,GHT
^JfpUT
M
TO
RIGHT*
VU
METER
WHT
VLT
r
y
*
/
\
•
R^b
JdO,
S'
I
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,*>
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■
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-
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GRV
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220
P
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0
lb
INS4A
&3lb
22*
•-Wr«
R33b
2.1
TO
TAPE
BUJ
SELECTOR
SW
(SW3)-
TO
SW9
—
TO
MONITOR
SW(SW4)
FROM
POWER
SUPPLY,
-5®
d
0.
POWE
o.s.c
PC.
BOARO.
FROM
VRI
TO
VRI
FROM
RIGHT
M
K
JACK
J5
TAPE
SELECTOR
SW
(SW3)
TO
SW9
TO
MONITOR
SW
(SW4)
FROM
VR2
TO
VR2
FROM
LEFT
MK
JACK
Jl
1
L*
WHT
2SC87UD
<£>
kJ/jI
R9b
471
to
TO-
?f
lAl
C4b
1/23
10/23
8
'8
i
:s
C9b
47/29
.2
Tltt
_
2SC87I
£XE>
CM
a
I
D8>iii
cit
4
.
7/25
R9
47K
CT
loop
Cfl
10/
6
^
CIS
*2
10/23
s***
TO
TO
*1
C4
1/23
»?
a
t
n
R
2
220K
KL
R3
IK
OSC.
POWER
P.C.
BOARD
(LE-5021)
O
FROM
SW9
SECTION
2
PARTS
LIST
TABLE
OF
CONTENTS
FIG.
1
HEAD
BLOCK
.
21
FIG.
2
SUPPLY/TAKE-UP
REEL
TABLE
BLOCK
.
23
FIG.
3
MOTOR
BLOCK
.
24
FIG.
4
FLYWHEEL/BELT
CHANGE
LEVER
BLOCK.
25
FIG.
5
SWITCH
BLOCK
.
..
26
FIG.
6
MECHANISM
ASSEMBLY
BLOCK.
28
FIG.
7
PRE-AMP.
P
C.
BOARD
(LE-5022)
BLOCK
.
29
FIG.
8
OSC.
POWER
P
C.
BOARD
(LE-5021)
BLOCK
.
30
FIG.
9
AMP.
ASSEMBLY
BLOCK.
30
FIG.
10
FINAL
ASSEMBLY
BLOCK
.
33
INDEX
.34
HOW
TO
USE
THIS
PARTS
LIST
1.
2
.
3.
This
parts
list
is
compiled
by
various
individual
blocks
based
on
assembly
process.
When
ordering
parts,
please
describe
parts
number,
serial
number,
and
model
number
in
detail.
How
to
read
list.
The
reference
number
corresponds
with
illustration
or
photo
number
of
that
particular
parts
list.
•This
number
corresponds
with
the
Figure
Number.
-This
number
corresponds
with
the
individual
parts
index
number
in
that
figure.
|
A
small
“x”
indicates
the
inability
to
show
that
particular
part
|
in
the
Photo
or
Illustration.
1IOX
<
Schematic
Diagram
Number
of
individual
manufactured
part.
(not
required
for
parts
order)
r
-
Quantity
of
particular
part
required.
*
Ref.
No.
Parts
No.
Description
i
t
Schematic
No.
Q'ty
FLYWHEEL
BLOCK
#13
12-11
Sx
800425
Flywheel
Block
Assy.
Comp.
RUG
#13
i
12-116
244506
Flywheel
Only
RO-233
|
12-1
17x
244754
Felt,
Flywheel
K
D-275
l
12-118
251324
Main
Metal
Case
R
0
236
I
12-1
19
2S3080
Main
Metal
R
1)
237
i
4.
The
symbol
numbers
shown
on
the
P.C.
Board
list
can
be
matched
with
the
Composite
Views
of
components
of
the
Schematic
Diagram
or
Service
Manual.
5.
The
indications
of
Resistors
and
Capacitors
in
the
photos
of
P.C.
Board
are
being
eliminated
6.
The
shape
of
the
parts
and
parts
name,
etc.
can
be
confirmed
by
comparing
them
with
the
parts
shown
on
the
Electrical
Parts
List
Table
of
P.C.
Board.
7.
Both
the
kind
of
part
and
installation
position
can
be
determined
by
the
Parts
Number.
To
determine
where
a
parts
number
is
listed,
utilize
Parts
Index
at
end
of
Parts
List.
It
is
necessary
first
of
all
to
find
the
Parts
Number.
This
can
be
accomplished
by
using
the
Reference
Number
listed
at
right
of
parts
number
in
the
Parts
Index,
(meaning
of
ref.
no.
outlined
in
Item
3
above).
8.
Utilize
separate
“Price
List
lor
Parts”
to
determine
unit
price.
The
most
simple
method
of
finding
parts
Price
is
to
utilize
the
reference
number.
ELECTRICAL
PARTS
LIST
TABLE
Because
(he
indication
of
resistors
and
capacitors
in
the
P.
C.
Board
photos
are
being
eliminated.please
confirm
parts
name
and
shape
by
comparing
(hem
with
the
parts
shown
in
this
table.
Solid
Resistor
Cement
Resistor
Wire-Wound
Resistor
'd
MP
Capacitor
(Tublcr
Type)
Plastic
Capacitor
M
f
Mylar
Capacitor
Tantalum
Capacitor
I.
I'erri
Inductor
Stopper
Type
|
3
Insulator
Type
Carbon
Resistor
1
Thermistor
Mylar
Capacitor
Oil
Capacitor
(Tubler
Type)
11
ft
Ceramic
Capacitor
Onset?
3
r
Enamel
Resistor
*
VFM
(HIQ)
Capacitor
Tubler
Type
Vertical
Type
fs
V
4
‘
«
II
Slyrol
Capacitor
12
Mctalized
Mylar
(Paper)
Capacitor
f
?I
n®
©l#AffM
Transistor
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