Technics RS-676US

J. Change of Dolby Circuit
REASON:
@
Improvement
of
Dolby
curve
in
high-frequency
range
characteristic.
®
Countermeasure
for
deviation
of
Dolby
adjustment
occurring
by
vibration.
MODIFICATION:
Part No.
Reason
|
Ref.
No.
Description
————______________———|
Remarks
Former New
R437,
438
|Carbon
Resistor
ERD14VJ333
|
ERD14VJ393
C417,
418
|Electrolytic
Capacitor}
ECEA6V47L
ECEALOV47L
C419,
420
|Ceramic
Capacitor
ECCD1H221K
|
ECCD1H220K
C437,
438
|Mylar
Capacitor
—
Disused
CQM
05102KZB
VR401,
Semi-fixed
Variable
=
402
rao
lg
or|
QVSR19R473B
|
QVSRI9R223B
NOTE:
C419
and
C420
are
changed
in
position
between
base
and
collector
of
Tr409
(L-CH),
Tr410
(R-CH).
CHANGEOVER:
From
the
production
of
September,
1974.
(From
seriel
number
RI4...onward)
K.
Change
of
Power
Transformer
REASON:
|
For
improvement
more
performance
and
the
countermeasure
of
safety.
MODIFICATION:
TS QLPN3EMH ——> QLPN3EMHA
INTERCHANGEABILITY:
Former and new parts are interchangeable.
CHANGEOVER:
From
the
production
of
September,
1974.
(From
serial
number
RI4...onward)
L. Change of Leaf Switch
REASON:
In
order
to
improve
contact
condition
the
contact
pressure
and
material
are
changed.
Contact Pressure: 15g +5 —> 208 a
MODIFICATION:
$103, 104 QSB0216 —> QSB0216A
INTERCHANGEABILITY:
Old and new parts are interchangeable.
CHANGEOVER: |
From
the
production
of
October,
1974.
(From
serial
number
RJ4...onward)