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Hitachi Manuals
Tape Deck
D-900BS
Service manual
Dolby Nr Adjustment; Playback - Hitachi D-900BS Service Manual
Stereo cassette tape deck
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^
a
English
8.
Dolby
NR adjustment
8-1
Record
Setting:
Playback Mode
Connection:
8.
Dolby-NR-Abgleich
8-1
Aufnahme
Einstellung:
Wiedergabe
Anschliisse:
8.
Réglage
de
Dolby
NR
8-1
Enregistrement
Réglage:
Mode de lecture
Brandrement:
Pin
Nos.8(L),9(R) oÍ
lC2
/^
.^
Adjustment
Feed
a
2kHz
signal
into
LINE lN,
so
that the
level at
Pin
Nos.
8(L),
9(R)
of
lC2
be-
comes
-20dBm. Next
put
the
DOLBY
NR
Switch
to
ON.
Adiust
RT1(L,R) so that the
level
at
Pin
Nos.
8(L), 9(R)
of
lC2
becomes
-15.7dBm.
8-2 Playback
Settingl
Playback mode
Connection:
LINE
lN
jacks
Abgleich:
Ein 2
kHz
Signal an
den
LINE
lN
Buchsen einspeisen,
so
daB
der
Pegel
an
den
Stiften
Nr.
8(L)
und 9(R) von lC2 -20dBm
betràgt. Danach
den
Dolby-NR-
Schalter
auf
Position
ON
stellen.
RTl
(L,R)
eínstellen,
so
daB
der
Pegel
an
den
Stiften
Nr.
8(L)
und
9(R) von lC2 -15,7
dBm
betràgt.
8-2
Wiedergabe
Einstellung:
Wiedergabe
Anschlússe:
Pin
Nos.2(L),
15(R)
of
1C5
Abgleich: Den
Monitorschalter auf
Position
TAPE
stellen
und ein 2kHz
Signal an den
Stiften
Nr.
2(L)
und
15(R) von
lCS
einspeisen,
so
daB
der
Pegel
an den Stiften Nr.8(L)
und
15(R) von lCS
-15,7
dBm
betràgt. Danach den
Dolby-NR-
Schalter
auf
Position ON
stellen
und
RTG
(L,R)
einstellen,
bis
der
Pegel
an
den
Stiften Nr. 8(L)
und
9(R) von
lCS -20dBm
betrart.
Róglage:
Appliquer
un
signal
de
2kHz aux
prises
d'entrée
de
ligne
LINE
lN
pour que
le
niveau
de
sortie aux
broches Nos
8(L),
9(R)
de
lC2 soit
égal
à -20dBm.
En'
suite,
basculer
la
clef de
com'
mutation
de Dolby
sur
ON.
Ajus-
ter
RTî(L, R)
pour que
le
niveau
de
sortie aux
brocfies Nos 8(L),
9(R)
de
lC2
soit
égal à
-15,7dBm.
8-2
Lesture
Róglage:
Mode de lecture
Branchement:
Adjustment:
Set the
Monitor
switch
to
the
TAPE and feed
a
signal
of
2
kHz
to
Pin
Nos.
2(L),
15(R)
of
lCS
so that the
level at
Pin
Nos.
8(L). 9(R)
of
lCS
becomes
-15.7d8m. Next, put
the
Dolby
switch
to
ON, and adjust
RTG
(L,
R)
for a
level
of
-20dBm
at
Pin
Nos.8(L),9(R) of
lC5.
Réglage:
Régler
la
clef de contròle
sur la
position TAPE
et
appliquer
un
signal
de
2kHz
aux
broches
Nos
2(L),
15(R)
de
lCS pour que
le
niveau
de sortie aux
broches
Nos
8(L), 9(R)
de
lC5 soit
égal
à
-15,7dBm,
Ensuite, basculer
la
clef de commutation
de
Dolby
sur
ON
et
ajuster
RT6 (L,R)
pour
que
le
niveau
de sortie
aux broches
Nos
8(L), 9(R) de
lC5
soit
égal
à
lCS.
Frequencl,
@unt€r
2kHz
Pin
Nos.8(Ll,9(Rl of
lC5
SG
Frequency
@untet
2kHz
/
VTVM
-15.7
dBm/
-20
dBm
,l
D-900
/
4
a-
l
/+\
-13-
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