TANDBERG 6000X Series User Manual

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4.0
HEAD ALIGNMENT WITH
TANDBERG
TEST TAPES, MODEL
6041X
4.1 Playback
Head
Set
the
recorder
for stereo
playback
and
connect
a
VTVM to
each one of the
phono
outputs.
4.1.1
Height Adiustment
Play
Tandberg
test tape No.
1. This
is a full
track
prerecorded
tape with
1.000 Hz recorded
at
7 ll2
ips,
and with the
area corresponding
to track
3 reduced
by
approx.
30 dB.
Adjust the
height of
the
playback
head
by means
of
the
screws
(A)
until minimum
output is
obtained from
track 3
(channel
R),
while endeavourlng
to
maintain the headfront
parallel
to
the tape.
4.1.2
Azlmuth
Adjustment
Play
Tandberg
test tape No. 2.
This is
a
full
track
prerecorded
tape with 10
000 or 15
000 Hz
recorded
at
7 tl2
ips. Adjust
the azimuth
position
of the
playback
head
by means
of the
screw
(B),
until
maximum
indication
on
the VTVM
is
obtained.
4.2 Record
Head
4.2.1
Height
Adiustment
by Visual Inspection
Insert
a
new
tape, and start the recorder in
normal
forward
drive.
Check visually that
the tape appears to
run
parallel
with the upper
track of the record head,
with
a
play
of approx.
0,1 mm
(4
mils).
If
necessary,
adjust
the
height with screws
(C)
fig.
3.1,
while
endeavouring
to
maintain the headfront
parallel
to the tape.
4.2.2Heighl
Adiustment
by Track Meaurement
Record
in
stereo,
well above
normal level, first in
one
direction, then
in the opposite. Cut
off
a length of tape
and
dip
it
into
a solution
of
fine
grained
iron
oxyde
powder
and
alcohol
(Magna
See). The
tracks will
then
be
visible
as
four
dark stripes
with spacings in lighter
shade.
Fig.6.1
shows
the
correct
pattern
on the tape
and the
patterns
obtained
when the head is
positioned
either
too
high
or too low.
Adjust
as
above
and
perform
a
new track
measurement.
4.2.3
Azimuth
Adiustment
Load
a
new
tape into
the tape
recorder
and
record
at
tape speed 7 Ll2
ips, a 15 000
Hz
signal in
stereo.
Depress
both
playback
buttons and turn
both
playback
volume
potentiometers
to maximum. Adjust
both Line
Record
l,evel knobs for
approx. 150 mV
at
the outputs.
Adjust
the record head
azimuth
screw for
maximum
output from
both channels simultaneously or
best
compromise.
4.3
Bias
Head
4.3.1
Vertical Adiustment
Move
the operating
lever
slowly to the normal forward
drive
position
and check that
the
head fronts of
bias- and
record
heads are
parallel.
If
necessary,
bend
the arm of
the bias head as required.
4.3.2 Height
Adjustment
Set
the
tape recorder
in record mode,
and unscrew the
locking screw
(H)
fig.
3.1, about
1/2
turn.
Connect a
VTVM
across each one
of the
record
head
halves. Move
the
bias
head
up or down
by
means
of adjustment screw
M
for the
highest
possible
reading
on
the
voltmeter.
Check that
the tape runs freely in
the
groove
in front
of
the bias head
and that
there
is
sufficient
clearance
between the
bias
head
and
the
mounting
plate
for
the
record head. The height
position
of
the
bias
head is
not
critical, and
if the clearance
between
the
bias
head and
the mounting
plate
for
the
record
head is insufficient,
raise the
bias head slightly.
4.3.3 Horizontal Adjustment
Connect
a VTVM across each one of the record
headhalves,
and
set the tape
recorder
for stereo record-
ing. Insert
a screwdriver in
groove
I,
ref. fig.
3.1, and
pull
the
bias head to the right.
Then
pull
the
bias head carefully
by
means
of
the
screwdriver towards the left hand side.
Induced voltage
(bias)
in recording head
increases to
a
maximum. Continue
pulling
the head towards left side
until the
bias
is reduced
by
10-15 7o
below
maximum.
When the
position
has
been
found,
thigthen
the
screw
(H)
while maintaining correct
horizontal
position
of
the
head.
Then
recheck the output
voltage. If
a noticeable
change
has
occured, the horizontal
procedure
has to be
repeated.
4.4
Erase Head
4.4.1 Height
Adjustment
By
visual inspection,
check that
approx.
0,25
mm
(10
mils) of the
upper half of
the erase head is visible
above
the tape. Insert Tandberg
test tape No.
9 and record
a
4OO Hz
signal
at 7 Ll2 ips well
above
normal
level on
channel R
(track
3). Dip
the tape in
a solution
of
fine
grained
iron
oxyde
powder
and
alcohol
(Magna
See
solution).
Check that
the recorded
track
is
positioned
in
centre of the
erased track.
Make sure
that
no
parts
of
the
adjacent tracks
are
erased, see fig.
6.2.
If necessary,
adjust the height
of the
erase
head
by means
of
the
screws
(K)
and
(L)
ref.
fig. 3.1,
and repeat the
above
check.
4.4.2 Azimuth
Adlustment
Check
that
the
head
front of
the
erase
head is
perpendicular
to
the
mounting
plate.
If necessar5r,
adjust
azimuth
position
by means
of
the
screws
(K)
ref.
fig.
3.1.
This
adjustment
is
not
critical.
4.5 Model 6021X
The
alignments specified
in
para.
4.0
are
valid
for the
model 6021X with the exception
of
paragraph
4.1.1,
which is
supenseded by 5.1.1 and
paragraph
4.2.1,
which
is superseded
by 6.2.2.
$'rF
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TANDBERG 6000X Series Specifications

General

Brand	TANDBERG
Model	6000X Series
Category	Cassette Player
Language	English