Technics RS-676US

CHANGEOVER: ;
From
the
production
of
January,
1975.
(From
serial
number
RA5...onward)
Change of Audio Amplifier Circuit (3)
REASON:
@
To
eliminate
click
noise
occurring
at
changeover
operation
of
FM
Dolby
switch.
@
Capacitance
of
playback
frequency
response
adjusting
capacitor
is
changed.
® To prevent the oscillation in high frequency.
MODIFICATION:
Part No.
Reason
Remarks
Description
New
ECQS1681J2
Former
ECQS1561JZ
Styro! Capacitor
Tantalum Capacitor ECEAL6V10L ECSZ16EF4R7
Carbon Resistor — ERD14VJ560
CHANGEOVER:
From
the
production
of
December,
1974.
(From
serial
number
RL4...onward)
Change of Control Circuit
REASON:
@
If
voltage
at
record
plunger
drops,
power
of
attraction
reduces,
resulting
in
failure
of
operation. To prevent such a trouble, resistance and capacitance are changed.
®
In
that
result,
because
the
current
is
increased,
diode
(D212)
damage
may
be
occured.
In order to prevent diode damage, R250 is added.
MODIFICATION:
Part No.
Ref.
No.
Description
Remarks
Former New
RZLS
Carbon Resistor
ERD14VJ472
ERD14VJ222
R216
ERD14VJ121
R233
ERD14VJ333
ERD14VJ560
ERD14VJ153
R241
ERD14VJ822
ERD14VJ183
R250
R253
ERD14VJ8R2
ERD14VJ682
ERD14VJ392
C201, 204, 415,
416, 423, 424
Aluminum Capacitor
ECAG25ER1
C205
CHANGEOVER:
From the production of September, 1974
Electrolytic Capacitor
ECEAL6V47L
. (From serial number RIl4...onward)
ECAGI6ERLY
ECEA1L6V100L