Dual C901 Handleiding
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•••••••
Dual
Edition
August
1975
c901
No.
37
000
and
subsequent
Nos.
Service
Manual
Dual
Gebrüder
Steidinger
•
7742
St.
GeorgenISchwarzwald
Download from www.dual.de
Not for commercial use
Contents
Technical
data
Mechanical
Part
Seite
2
1.
Dismounting
and
mounting
3
2.
Removal
of
front
panel
and
cover
plata
3
3.
Motor
4
4.
Adaption
for
line
frequency
4
5.
Drive
belts
5
6.
Coupling
assembly,
5
7.
Tape
motion
keys
6
8.
Locking
pawl
6
9.
Power
switch
6
10.
Muting
switch
7
11.
Cleaning
7
12.
Lubrication
7
Electrical
Part
Functions
8-11
Test
and
adjustment
data
11-13
Adjustment
14-15
Circuit
Diagram
16-18
Printed
circuit
boards
19-24
Spare
parts
and
exploded
views
25-38
Technical
data
The
Dual
C
901
meets
or
surpasses
the
requirements
of
DIN
(German
Industry
Standard)
45
500
for
HiFi
home
studio
equipment.
Tape
speed
1.875
ips
Deviation
from
correct
speed
<
1
%
Wow
and
Flutter
Measured
according
to
DIN
45
507
Weighted
R.M.S.
Frequency
response
(according)
to
DIN
45
500
With
Standard
(STD)
tape
With
Chromium
dioxide
(Cr02)
tape
Dynamic
range
Measured
according
to
IEC,
curve
A
With
*Dolby
system
<
0.12
%
<0.09
%
30
—
14,000
Hz
30—
16,000
Hz
>
51
dB
>
60
dB
Harmonie
Distortion
<
2
%
at
333
Hz
0
dB
VU
Oscillator
frequency
85
kHz,
push
-pull
oscillator
Erasure
STD
>
70
dB
Cr02
>
65
dB
Channel
separation
in
opposite
direction
between
stereo
channels
>
60
dB
>
30
dB
Inputs
Radio
(DIN
jack)
1.8
mV
into
20
kohm
(RCA
jack)
60
mV
Microphone
0.22
mV
Outputs
Radio
(DIN
jack)
0.75V
(RCA
jack)
0.75
V
Headphones
(designed
for
approx-400
ohms
impedance)
Fast
-wind
time
58
seconds
for
C
60
Cassette
Semiconductor
Complement
Line
voltage
Line
frequency
Dimensions
4
IC's,
3
FET's
32
transistors
1
photodarlington
38
diodes
110
—
117,
220
—
240
V
Adaptable
to
50
or
60
Hz
420
x
122
x
281
mm
(W
x
H
x
D)
Weight
Approx.
6.5
kg
*
Dolby
is
a
registered
trade
mark
of
DOLBY
Laboratories
Inc.
Mechanical
Part
Fig.
1
1.
Dismounting
and
mounting
Pull
out
power
plug.
Remove
mounting
plate
from
the
bottom
of
the
cabinet.
Release
pull—relief
of
power
cable
by
removing
the
securing
wedge.
(Fig.
1)
After
detaching
the
two
covers
(7)
from
the
cover
plate
(2)
the
wood
screws
under—
neath
should
be
removed.
(Fig.
2)
Then
raise
left—hand
side
of
chassis
slightly
(looking
at
the
unit
from
the
front)
and
pull
to
the
left,
lift
chassis
out
up—
wards.
When
mounting
proceed
in
reverse
order.
2.
Removal
of
front
panel
and
cover
plate
To
remove
the
cover
plate
(Fig.
3)
detach
the
two
slide
knobs
(191/204)
and
remove
the
following
parts:
)
The
two
hexagon
head
seif—tapping
screws
(37)
on
the
back
b)
The
two
oval—head
screws
(5)
on
the
front
c)
The
two
fillister
head
cap
screws
(35)
and
the
two
retainer
straps
(34).
In
addition
the
two
fiiii—
ster
head
cap
screws
(25)
should
be
loosened
and
the
two
clamps
(24)
pushed
back.
Flip
up
the
n
meter
(188)
and
open
the
cassette
hol—
der
(16).
Detach
front
pa—
nel
(11)
and
cover
plate
(2).
Gerry
out
mounting
in
reverse
order,
ensure
that
the
slider
(S)
für
STD/
Cr02
bias
switching
enge
—
ges
with
switch
layer
(61).
Fig.
2
le
Fig.
3
3
Product specificaties
| Merk: | Dual |
| Categorie: | Niet gecategoriseerd |
| Model: | C901 |
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