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TANDBERG TCD 310 Service Manual

TANDBERG TCD 310
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Voltmeters
|
R801
(left
ch.)
CrOz
|
Voltmeters
|Set
the
cassette
deck
to
CrO2
recording
and
adjust
R901
{right
ch.)
|€801
(left
ch.)
and
C901
(right
ch.)
to
readings
of
see
“location’’
drawing
OUTPUT
sockets
approximately
6—8
mV.
(Measure
between
ground
and
the
side
of
the
resistor
which
is
connected
to
the
head.)
Set
the
cassette
deck
to
CrO2
recording.
R1
and
R2
to
mid-position.
Connect
an
audio
generator
to
the
INPUT
sockets.
Adjust
the
jgenerator
to
400
Hz,
-5
dB
(=
450
mV
on
the
voltmeters).
(—5
dB
is
used
instead
of
0
dB
in
order
to
avoid
inaccurate
results
caused
by
varying
tape
characteristics.
y
varying
tap
)
Bakes
output
Rewind
and
play
back.
The
voltmeters
should
now
read
—5
dB
(=450
mV)
+
0.5
dB.
If
outside
the
tolerance,
make
a
new
recording
while
adjusting
R105
(left
ch.)
and
R205
(right
ch.)
as
required.
Then
play
back
and
check
once
more.
Voltmeters
Distortion
meter
Voltmeters
CrQ2
|
Indicators
Mian
aa
Voltmeters
HL
HL
Voitmeters
|
i
H
Distortion
meter
;
HL
Voltmeters.
Voltmeters
Hum/noise
meter
(according
to
DIN
45.405)
OUTPUT
sockets
OUTPUT
sockets
OUTPUT
sockets
OUTPUT
sockets
OUTPUT
sockets
OUTPUT
sockets
OUTPUT
sockets
Set
the
cassette
deck
to
CrOg
recording.
Adjust
the
generator
to
—35
dB
{=
14
mV
on
the
voltmeters)
and
record
a
400
Hz
and
a
10,000
Hz
signal
at
this
level.
Rewind
and
play
back.
Use
the
400
Hz
signal
as
a
reference
and
check
on
both
channels
that
the
10,000
Hz
signal
is
within
the
following
tolerance:
-0
dB
to
+5
dB.
If
outside
the
tolerance
adjust
C801
and
C901
(bias).
Then
make
a
new
recording,
play
back
and
check
once
more.
Set
the
cassette
deck
to
CrOg
recording.
Generator
to
1000
Hz,
0
dB
(=775
mV
on
the
voltmeters).
Rewind
and
play
back.
Check
that
the
distortion
is
S
5%
(3rd.
harmonic
distortion
according
to
DIN
45,405).
If
outside
the
tolerance
adjust
C801
and
C901
(bias).
Make
a
new
Set
the
cassette
deck
to
CrO2?
DOLBY
(!)
recording.
Adjust
the
generator
to
—35
dB
and
record
the
following
frequencies:
400
Hz,
55
Hz,
1000
Hz,
4000
Hz,
10,000
Hz,
12,500
Hz.
Rewind
and
play
back.
Use
the
400
Hz
signal
as
a
referance,
and
check
that
the
other
signals
are
within
the
following
tolerances:
55
Hz:
~3
dB
to
+2
dB
10,000
Hz:
OdBto+
5B
1000
Hz:
~2
dB
to
+2
dB
12,500
Hz:
—2
dB
to
+
5
4B
4000
Hz:
—2
dB
to
+4
dB
If
outside
the
tolerances
try
changing
the
values
of
Cb01/C502
(left
ch.)
and
€601/C602
(right
ch.).
Increased
values
give
higher
treble
response.
Record
a
400
Hz,
0
dB
signal
and
adjust
R115
(left
ch.)
and
R215
(right
ch.)
to
0
dB
deflection
on
both
indicators.
Same
as
in
step
9.2,
except
that
the
CrOg
button
is
released.
If
outside
the
tolerance
adjust
R104
(left
ch.)
and
R204
(right
ch.).
DO
NOT
TOUCH
R105
OR
R205.
NOTE!
Adjustment
of
R104
and
R204
will
not
affect
the
readings
on
the
indicators
of
the
cassette
deck.
Same
as
in
step
9.3,
except
that
the
CrO9
button
is
released,
If
outside
the
tolerance
adjust
R807.
DO
NOT
TOUCH
C801
OR
C901.
Same
as
in
step
9.4,
except
that
the
CrOg
button
is
released.
If
outside
the
tolerance
adjust
R807.
Then
repeat
11.2.
DO
NOT
TOUCH
C801
OR
C901.
Same
as
in
step
9.5,
except
that
the
CrO9
button
is
released.
Tolerances:
55
Hz:
—3
dB
to
+2
dB
10,000
Hz:
—2
dB
to
+5
dB
1000
Hz:
—-2
dB
to
+2
dB
12,500
Hz:
—3
dB
to
+4
dB
4000
Hz:
-2
dB
to
+4
dB
If
outside
the
tolerances
try
changing
the
values
of
C503/C510
(left
ch.)
and
C603/C604
(right
ch.).
Increased
values
give
higher
treble
response.
Record
a
400
Hz,
0
dB
signal.
Rewind
and
erase.
Then
rewind
once
more
and
play
back
the
erased
piece.
The
voltmeters
should
read
<—
62
cB.
The
signal/noise
ratios
at
5
%
distortion
should
be
at
least
as
good
as
specified
in
the
table
below:
NORMAL
DOLBY
Signal/tape
noise:
HL
CrO2
HL
CrO2
DIN
45.511
(Gerauschspannung)
46
dB
49
dB
55dB
58
dB
DIN
45.511
(Fremdspannung)
46dB
48dB
50dB
50
dB

Table of Contents

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TANDBERG TCD 310 Specifications

General IconGeneral
Weight7.5kg
Track System4-track, 2-channel stereo
Tape Speed4.76 cm/s
Heads1 x record/playback, 1 x erase
TypeCassette Deck
Frequency Response30 Hz to 16 kHz (Chrome tape)
Signal to Noise Ratio58dB
Wow and Flutter0.07 %
MotorDC servo motor
Tape TypeCrO2
Power Supply220V
InputLine In

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