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5.
Set the TAPE SELECTOR switch to match Ihe lape thai
you are
using.
6.
Sel the Dolby NR switch 10 C (for maximum quieting of
background tape
hiss),
unless you are recording a tape for
playback on a
portable
or other machine that has
only
Dolby
B or no noise reduction at all. When recording with Dolby
B,
switch Ihe MPX filter ON (button
in).
Z In order 10 determine the optimum recording setting of
the
RECORD LEVEL control, it is desirable to activate the
recording
circuils
without actually depositing a recording on
the tape. To do this, press PAUSE and then
REC.
Observe the
recording level display while setting the RECORD LEVEL
control so Ihat the highest levels
in
Ihe music regisler are at
approximately 0 dB.
When you are ready to
proceed
with the recording, press
and release the PAUSE button to start the tape
moving.
(Its
motion will be confirmed by the
gradually
changing reading of
Ihe turns counter.) Since Ihe recording circuits have already
been
aclivated,
Ihere is no need to press REC
again.
8.
In most cassettes the first few inches of tape al either
end is a "leader" with no magnetic coating. Remember to let
the tape advance by
several
counts
(on
the turns counter)
before beginning the recording
.
9.
To interrupt the recording al any
point,
press PAUSE
;
this
will
stop the lape while leaving the recording circuits and
recording
level
display active. To resume recording, press and
release PAUSE again
.
10.
At the end of the recording
session,
press STOP.
If you want 10 continue recording on the other side of the
cassette, press FAST FORWARD
to
advance the tape to the
end of side
A;
remove the
cassette,
turn
it
over, and insert it
with side B facing
you.
Press REC to resume recording
.
To
Erase
Tapes. The recorder automatically erases pre
-
vious recordings as a fresh recording
is
made.
To erase an
entire
tape, simply
turn down the RECORD LEVEL control
to
minimum,
press
REC,
and record over the full length
of the
tape.
Prevention
of Accldentaf Erasure. Every cassette is
equipped with two plastic tabs in cutaway holes in the top
(thin) edge of the
cassette.
One tape is for side A and the
other for side
B;
when you hold
the
casselle so that
side
A faces you,
its
tab is
on
the top of the cassette near the
left
end.
These tabs engage
a
safety interlock in the recorder that
permits Ihe recording and erasing circuits to be activated
.
If
you think that you may wish to erase and re-use a cassette in
the future
,
do not disturb the
tabs.
But if you have made a
valuable
recording that
you
want to
keep,
you can safeguard
it against any possibility of accidental over-recording and
erasure by breaking off the corresponding tab. (If the valued
recording
occupies
both sides of the
cassette,
break off
both tabs.)
If you change
your
mind and decide
to re-record
over
the tape after having removed Ihe erasure-prevenlion
tabs,
simply cover the cutout wilh a piece of cellophane or olher
adhesive
tape.
Maintenance. The bearings and olher moving parts
in
this
recorder
are assembled with long-life lubricants and
requ ire no periodic
maintenance.
But
in
order
to
preserve the
NAD 6125 's high level of
performance,
all
surfaces thai the
tape comes in contacl with must be maintained free of dirt
and free of
magnetism.
7
Regular cleaning
is
the primary requirement. Dirt particles
smaller than a Iwo-Ihousandlh of an inch (0.01 mm), if lodged
on the polished surface of Ihe record/play
head,
can cause a
large falloff in high-frequency response
.
One easy
way
10
clean
the heads on a daily basis is to use a head-cleaning
cassette
(a cassette that contains a
lextured
paper
tape
inslead of
magnelic
lape).
Play
the
cleaning casselle for
several
seconds
before each recording or playback session,
and as Ihe cleaning tape rubs over the heads it will remove
accumulated
parlicles of dust and
tape
oxide.
At
longer
intervals-weekly or
monthly
depending on how
heavily
you
use the machine-a liquid
solvent
or
spray
should
be used to remove lape
oxides
or
sticky
residue deposited on
Ihe
heads,
capstan,
and pinch
roller.
Tape head cleaning
sprays and fluids are available from your hi-fi dealer and from
other sources
.
We recommend a
solution
whose active
ingre-
dient is either alcohol (denatured or
"isopropyl")
or Freon (a
fluorinated
hydrocarbon compound); some head cleaners
con-
tain both
.
If
you use
isopropyl
alcohol,
check to
be
sure
that
the solution does not contain any unwanted oily substances
such as
Lanolin.
To
clean
the
tape
transport,
remove any casselle from
the machine. Use the fluid or spray
to
moisten a cotton
swab,
then use
the
moist
swab
to scrub the black erase head, the
silver-colored record/play head
,
the steel
capstan,
and the
black rubber pinch
roller.
The door of the cassette compartment can be removed to
provide easier access to
the
heads for cleaning and demag-
netizing.
The
door
is actually in two parts
:
the framework that
holds the
cassette,
and
an extenor
plastiC
trim panel contain-
ing the NAD logo
and
the transparent
window.
Press EJECT to
swing the door open; remove any
casselle,
and press firmly
upward on the exterior surface of the door to detach it from the
cassette
holder.
(Your NAD
dealer can show
you
how to do
this.)
To re-install the door
panel,
align its fastening clips with
the retainers on the casselle
holder,
and slide the panel down
into
place.
During months of regular use the heads and sleel capslan
may acquire a magnelic charge that will add hiss to all lapes
played or recorded in the
machine.
Approximately once
a
year
Ihis
charge should be removed by using a head
de-magnetizer.
Before using the de-magnetizer,
switch
off the power to
the recorder. Open the cassette compartment, and remove
its
door panel. Take away any cassettes from the vicinity. Hold
the
de-magnetizer away from the machine (to protect the
recorder from the de-magnetizer
's turn-on
surge)
;
plug in the
de-magnetizer,
turn it
on,
and
then
slowly pass
its
probe tip
over
the heads and capstan
.
(The
probe tip may be allowed to
touch the heads and capstan-but only
if
its metal surface is
covered with a plastiC sleeve or wrapped with plastic tape to
prevent it from scratching the heads.) Move the probe tip
slowly out of the casselle
compartment,
and move
the
de-
magnetizer at least a meter (3 feet) away from the recorder
before
switching
it
off.
If
you
aCCidentally switch
off
the
de-magnetizer while
its
probe tip is within the cassette
compartment, the entire de-magnetizing procedure must
be repeated.
If
you
prefer not to
do
it
yourself,
you
may have a
complete
annual cleaning and de-magnetizing
service
done
for your
recorder by
your
NAD dealer
or
by an independent
service
shop. At the same
time,
you may have the recorder's
internal bias and Dolby circuit adjustments calibrated to match
the
particular brand
and
type of tape that you prefer
to
use.
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