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Technics RS-676US

Technics RS-676US
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M.
Change
of
Accessories
&
Packings
MODIFICATION:
Part
No.
|
Remarks
D
ae.
Ks
escription
Old
Accessory
Bag
5
Dust
Cover
|
QFYO047
XZB16X22A05
Inside
Carton
QPN3082
QPN3180
New
Spacer-2
QPA0116
—
Disused
CHANGEOVER:
From
the
production
of
September,
1974.
(From
serial
number
Ri4...onward)
N.
Change
of
Level
Meter
REASON:
For
improvement
more
performance
and
countermeasure
of
safety.
INTERCHANGEABILITY:
Old
and
new
parts
are
interchangeability.
MODIFICATION:
ES
QSL1052RN
—>
QSL1052RNAM
CHANGEOVER:
From
the
production
of
September,
1974.
(From
serial
number
Rl4...onward)
Oo.
Change
of
Bias
Current
REASON:
Decrease
of
bias
current
causes
overall
frequency
response
to
rise
in
the
high-frequency
range
but
worsens
distortion
factor.
Therefore,
the
standard
value
of
bias
current
is
changed
from
0.17
mA
to
0.21
mA.
MODIFICATION:
Standard
Value:
0.17+0.05
mA
|—->}
Standard
Value:
0.21+0.05
mA
|
(on
page
12)
0.12
mA
—>
0.16mA
(on
page
17)
Correction
of
Measurement
Method
in
Dolby
NR
Bias
leak,
if
occurring,
is
cut
by
the
L.P.F.
mounted
in
the
front
stage
of
Dolby
NR
circuit
because
of
high-frequency.
Practically,
no
problem
arises
relating
to
the
measurement.
Stop
the
bias
oscillation.........
on
page
19.
(Error)
Need
not
to
stop
the
bias
oscillation
(Correction)

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