THORENS TD 125 Service Manual

t.
Dle'Arbeltsnelse
de!
qlat!'cnrplel€r! TD
125'
I
Das
Blld
I
zelgt
schainatlgch
den
Aufbau
deE
Platt€nsplelcrd'
Daa
Hauptchaggls
trtEt
den t{otor
unil
dl€
welt€ren
zuDr
Antrleb
bcnotlgten
Aggregate.
Das
platrenterrerraiSi
[if,;;-i.;;i"-u"rl"a."
rlch
dasesen
auf
den
schwlnschaasis'
<tis
alurch
3 Federn
itt
aen
Hauptchaarls
verbunden
lst'
.Der
Antrleb
dea PlattGntellors
crfolgt
dulch
elnen
alaatlachen
Rlenren'
sornlt-
ent-
steht
an
kelnern
Punkt
61ne feate
Verkopp.i*S
zwigchen
den
llaupt-
gnd
den
Schwtng-
chassi6.
zum
Antrleb
wlrd
eln
16-poltger
Sl,nchrorutotOr
Verwendet,
der
aug
elnem
wechaelapan-
nnngsgen€ratot
g..p.f"t
ifral
Daa-B1ldl
2 zeLE:-
dae
Sehaltblld
dleges
Steuergenera-
tors.
Ea
handelt
slch
ur0
elne Verctf,rk€rschaltungl
dle,-zwel
Funktlon€n
bcsltzt'
E!'nerealti
dlent
ete
ats
veratllfu;;;r;"p"i-iu"
ai"
fiienbrocke,
anderergelts
lst
thre
Endlstufe
der,art
bcneseen,
daeg
au!
thr ier
Motor-dlrekt
ohne
weltere
Verstgrkung
geapelat
wor-
den
kann.
sfe
Uerteil,-;l.-i.f-ni
ietetungaverstlrkern
aus-einer
eLsenlosen
Gegen-
taktstufe
nlt
den iiiiri"ioi."
ao
Ug
(r5i
'r7),
dle-mlt
Hllfc
dec
tbmPlementtrpaur
BC
147-BC
1??
(T1r
12)
trn C€gentakt
angesteuert
wlr'l'
1. Fonctlonnement'.de
la table
de lecture
rD
1?9
La
flgure
(1)
1uu8tr6
schgrnatlquernent
lt
eonatruetlon
de cet
tpparell'
Le
chagsla
prlnclpal
flxe
supporte
le
lpteur
3t
lea
autres
616tnentB
necelralres
a
I'entratnement
du
Plateau.
Le
paller du
plateau
et le
bras
lecteur
tont
Par-contre
ttbntcs
aur
un
chasels
ln-
termcdlalre
"o"p.nao
6lastlguenent
au
chaesls-prlnclpal
au
noyen
dle
3 regsorts'
Ltentratncnont
du
phtoau
gst
arEur€
Par
une
cgurrol€,de
"ooltthoo"'
rl nrexlrte
alns1
aucun"
g"i"5i-Iiiial-Jriil-i"
'"i"rsrs
prinelpal
et le
chatslr
rurpcndu.
Le
plateau
egt
entralnE
par
un
moteur
synchrone
a.19
Pgfes
allnentd
Par
un oscll-
Iatlur.
!a
flgure
(2)
nontre
le
sch€ma
de
cet
osclllateur'
11 araglt
drUn
clrcult
ampllflcateur
e
double
fonctlon.
Drune
Part
11
est
utllls€
colune
quadrlpole
drampllflcatlon
pour-le
Pont
dle Wlen
et
dtautia
Part
3on
6tage
de
sortle
est
afneneionn'E
de
naniEre
! allnenter
le noteur
directenentr
8dll8
aucune
autre
ampllflcatlon.
r,r6tage
de sortle,
comng-dana
lea
anrpltflcateurs
de
pulasance
BF'
est
conposd
drun
6tase
push-p"rr
llnl-1"3,-i*'.".f."
tiingfgors
AD
14i
(T5
et
T7)3
11
est
conmandc
e.
ir"i-puri
a
r;iia.-a;'fi
p.rt. eonpl6nentalre
BC I47-Bc
I77
(T1
et
.12)'
FLgure
no. I
Ehowg
stnpllftedl
the
basi'c
design
of
the
turntable'
The
maln
chasata
contaLns
the
notor
and
the
further
elernents
of
the
drlvlng
nechanlgm'
whlle
the
turntable
beartng
and
th€
toneirm
are
sltuated
on
the
sprlng
suependad
chaagla'
rrrr"
r" connected
tttil
miln
chaegls
by
three
splral
sprlngs'
The
turntable
Is
drlven
frotn
th8
notor
by means
of
an-elaetl'c
belt'
so
that
lhere
lg no
rlgld
couplrng
letween
ttre-rnafn
and
the
iprlng
suspencled
chaBsls'
Ihe
motor
ts a l6-po1€
synchronoua
tl?9.whlch
18 controlled
by
an
AC
generator'
FLgure
no.
2
shons
the
scienatti
alagram
of
thlg
control
generator'
It
18 an
anpllfler
clrcult
nl.th
tno
dlfferent
functlons.
on
bne
glde
lt
Ls
connected
to
l-wiln-lrra-g.l-".-tfiir-ii
worrg
""
"tt
o".iiiator
ana
on
th€
other
slde
l!-s
flnal
sgage
is
powerful
enough
dl-aiitil-trt"
rnotoilittt6ut-iotltr-r
arnprreicatt'on'
The
flnal
Etaga
ls
a
tranaformerless
pu8h-pull
anpllff.r-riii-t*-
tranglatoig
AD
149
(T5,
T7)
whlch
arc
fe6
by
a comprementary
;;it-;a
r47:
Bc 17?
(T1r
T2)
tn
puah-pulI'
2

THORENS TD 125 Specifications

General

Drive System	Belt drive
Motor	16-pole, 2-phase synchronous motor
Speeds	16, 33 1/3, 45 rpm
Drive method	Belt drive
Wow and flutter	0.06% WRMS
Platter	6.8 lbs (3.1 kg), non-magnetic
Tonearm Compatibility	Standard 9-inch tonearms
Suspension	Spring suspension
Speed control	Electronic
Rumble	-68 dB
Platter weight	6.8 lbs (3.1 kg)