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TANDBERG 6000X Series User Manual

TANDBERG 6000X Series
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2.0
ALIGNMENT
It is-important
that
the
contact
between
the
tape
and
the
heads
on.the
tape
recorder
is
good.
To
obtain
optimum
results
on
new
tapes,
the
tape should
be run
through
the
tape recorder
approx.
5 times
at normal
speed
to
have
the tape
polished
before
measuring
the
friquency
res-
ponse
and the
signal-to-noise
ratio.
2.1
Demagnetizing
Demagnetize
the
heads
and
adjacent
parts
before
aligning
the
heads.
2.2
Bias-
and
Erase
Circuits
2.2.1
Oscillator
Frequency
Connect
a
calibrated
long
wave receiver
(tuned
to
256.5
kHz),
frequency
meter
or frequency
counter
to
the
oscillator
by
means
of
a
pick-up
loop
placed
around
the
erase
head. Adjust
the
oscillator frequency
to 8b.b kHz
by mens
of C404.
2.2.2
Era* Voltage
Set the
tape recorder
for
stereo recording
and connect
a
VTVM
to
upper
half of
the
erase head
by
means
of a
low-capacitance
probe.
The
voltage
should
be 80-120V.
Then
check that
the same voltage
appears
across lower
headhalf.
Set
the
tape recorder
for recording
on channel
L
and
check
the voltage
across
upper half
of the erase
head.
The
deviation from
the voltage
measured
in
stereo
recording
should
not exceed
10V.
Proceed
similarly
for
recording
on
channel R.
2.2.3
Btas Current
Set
the
tape
recorder
for
stereo recording
and measure
the
voltage
across
upper
half of the
bias head
by means
of a VTVM.
Adjust
the
voltage
to 22Y
by
means of
R407.
Check
the
voltage
across lower
head-half
and
adjust
to 22Y
by
means
of R410. Demagnetize
heads
and
tape
path.
3.2
Mechanical
adjustment
of tape
path
Prior
to the
electrical
adjustment
of the
heads,
it
is
essential
to make the
tape
run
without
sideways
move-
ment
through
the
path.
Set the operating
lever
to neutral
position.
Unscrew
the
screw holding
latch 215563
to
allow the latch
to settle in
the
position
determined
by
spring
284478.
Then tighten
the
screw. The
spring
pressure
will
now
be equal
against
the_ upper
and lower
points
of
pressure
roller
pivot
247941.
Put
a tape free
from
damages
on the
recorder
in
normal
way and
set the operating
lever
to normal forward
drive
position,
Adjust the
azimuth
position
of
pressure
roller
99033.1
with
a screw
driver
as shown in fig.
3.2, until
the
tapg
ls
running
evenly through
the
rest of
the tape
path,
$ightly
touching
on-e of the
flanges
of the tape
post
1
located
adjacent to the
capstan.
Align
guide
post
2, 3,
and
4 similarly.
If necessary,
adjust
pressure
roller
spring
234478
to make
the
tape
run
perfectly.
-
-<l
3.0 TAPE
PATH
3.1
Visual
Check
Load
the recorder
with
a t-ape,
and
move
the
operating
lever
dowly
to
the
normal
forward
drive
position.
Checi
that
the
bias
head neither
touches
the height
adjustment
screws (C)
on
the record
head
base
plate,
nor
presses
the
tape
against
the
record
head.
Also
check
thit
the
bias
head
is
parallel
to the
record
head.
Operate
the start/stop
button,
and check
that the
tape
runs
within
the rims
of the
pressure
wheel
rubber
without
flickering
on
neither
side
of the
pressure
wheel.
Check
that
height positioning
of
the
guide
posts
is
cor:ect.
It
can
be
tolerated
that
the tape
touches
the
flanges
of
the
guide
posts
when
the recorder
is in
normal
forward
drive,
or
as the
drive
mechanism
is
engaged.
The
tape
must,
however,
by
no means
bulge
at the
flanges.
ln
IHMD
Fig.
3.1 Tape
path
adjustment
screws
Fig.
3.2
Azimuth
adjustment
of
pressure
roller
rll'\

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TANDBERG 6000X Series Specifications

General IconGeneral
BrandTANDBERG
Model6000X Series
CategoryCassette Player
LanguageEnglish

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