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Sanyo RD 30 - Playback and Meter Adjustments; Playback Output Level Adjustment; Meter Level Adjustment; Frequency Response Adjustment

Sanyo RD 30
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ELECTRICAL
ADJUSTMENTS
(continuea)
PLAYBACK
OUTPUT
LEVEL
ADJUSTMENT
LEFT
CHANNEL
.
Connect
a
VTVM
to
the
left
channel
LINE
OUT
as
illustrated.
Then,
insert
test
tape
for
the
DOLBY
Level
Calibration
(Example:
TEAC
MTT-150)
into
the
cassette
compartment.
VTVM
560mV
47
k-ohm
Dummy
Load
.
While
playing
back
the
test
tape,
adjust
the
potentiometer
(P101)
until
the
output
level
becomes
560mV
on
the
VTVM.
RIGHT
CHANNEL
Connect
a
VTVM
to
the
right
channel
LINE
OUT.
Then,
adjust
the
potentiometer
(P201)
for
the
right
channel
by
following
the
same
procedure
as
for
the
left
channel.
METER
LEVEL
ADJUSTMENT
LEFT
CHANNEL
Connect
an
audio
signal
generator
and
an
attenuator
to
the
left
channel
LINE
IN,
anda
VTVM
to
the
left
channel
LINE
OUT
as
illustrated.
Then,
insert
a
bulk-erased
tape
into
the
cassette
compartment
and
set
the
unit
in
the
recording
mode.
: ;
LINE
IN
Audio
Signal
RECORO
Generator
R
1
Attenuator
:
315mV
(—10dB)
LINE
OUT
PLAY
BACK
Dummy
Load
While
feeding
the
1kHz
signal
from
the
audio
signal
generator
at
315mV
(—10dB)
to
the
unit,
adjust
the
left
channel
INPUT
Level
Control
until
the
VTVM
reads
560mvV.
Keeping
the
unit
in
the
condition,
adjust
the
potentiometer
(P103)
until
the
pointer
of
the
left
channel
Meter
swings
to
the
DOLBY
mark
position
as
illustrated.
SLL
pi
eyes
+
==@
wee
%
ra
50
100
fp
INPUT
LEVE
OUTPUT
LEVEL
RIGHT
CHANNEL
Connect
an
audio
signal
generator
and
an
attenuator
to
the
right
channel
LINE
IN,
and
a
VTVM
to
the
right
channel
LINE
OUT.
Then,
adjust
the
right
channel
INPUT
Level
Control
and
the
potentiometer
(P203)
for
the
right
channel
by
following
the
same
procedure
as
for
the
left
channel.
RECORD
&
PLAYBACK
FREQUENCY
RESPONSE
ADJUSTMENT
1.
for
Chromium
Dioxide
Tape
LEFT
CHANNEL
Connect
an
audio
signal
generator
and
an
attenuator
to
the
left
channel
LINE
IN,
and
a
VTVM
to
the
left
channel
LINE
OUT
as
illustrated.
Then,
insert
a
chromium
dioxide
tape
(Example:
TDK
AC-221)
into
the
cassette
compartment.
Audio
Signal
LINE
IN
RECDRO
Generator
R
L
1kHz,
12.5kHz
Attenuator
5mV
(—46
dB)

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