THORENS TD-150 AB User Manual

PAGE
:
2/L5
If
under
Ehese
conditions,
Ehe rumble
level
of the
turntable
is
judged
disturbing, Ehe
following tests
nay help
to Erace
the cause
of Ehe trouble. For analysis
of Ehe
noise,
firsE
lift the
pick-up
off the
record
without
changing
the
control
setting;
the remaining
noise will
be
hum.
Shut
off
the
turn-
table
,
if
the hum rernains
it may
be
concluded
tha t
the hum is
due to
an
incomplete or incorrect
installation
of
the
pick-up
carEridge, the
improper wiring
sysEem
is employed
(3
wire or
5
wire)
for Ehe
parEicular
manufacEure
of carEridge
or the
amplifier
is
at
fault.
The amplifier
may
and
observing
the
should
be
checked
The
wiring sys
tem
pick-up
carEridge
be
checked
by
short-circuiting
the
inputs
hum
level.
If
it is
unchanged
the amplifier
fur
ther
.
(3
wire or
5
wire) as recommended
by
the
manufacturer
should
be
employed.
If
when the turntable
moEor
cause
nay be
attributed to
(rumble)
.
LubricaEion
and
followed
as
described.
ACOUSTIC FEEDBACK
is shut
off
the
hum ceases.
The
EurnLable and
/
or
motor
vibrations
service
procedures
should
be
The
very
low
frequency
sounds
coming
out
of the
loudspeakers
rnlly
Eransmit appreciable vibraLions
to the
turntable. The
cabineE
supporting
this
turntable,
scting
as a resonaEor,
may
amplify
Ehese
vibrations.
This
will result
in higher
noise
levels,
and
in
some
cas€s,
in instability
or
feedback.
The
acoustic
isolation of
the
THORENS
model TD-150
turntable
may
be
adj us Eed as
described in Ehe
section
"Chass
is
suspens
iont'
.
If
the cabinet is acting
as a resonaEor,
it
may
become
necessary
Eo
find
another
place
for the
turnEable
if
compleEe
stability
is
to
be
obtained.
SERVICE
PROECDURES
RUBBER
BELT-S
8OO-574
Examine
Ehe rubber
belt by
stretching
it.
If
cracks
appear
in the rubber,
the
belt
is
dried
out
and
should
be
replaced.
Before replacing
the
belt,
examine
Ehe
surface
of
Ehe motor
pulley
and ouEer
skirt
of the
inner
turntable
for traces
of
rubber
deposits.
Clean
Ehese surfaces
with
a soft cloth
saturated
in
denatured
alcohol
and
replace
the
belE.

THORENS TD-150 AB Specifications

General

Drive System	Belt Drive
Tonearm	TP 13
Suspension	Spring Suspension
Platter Material	Aluminum
Speeds	33, 45 RPM
Weight	8.5 kg