Marantz SD555 - Page 12

5. Adjusting the Recording Section
(1) Adjusting the record/playback overail frequency response.
(HIgh)
1) Load the test tape AC-514, record a signal with an input
level of —40 dB. 1 kHz at the LINE IN terminal; playback this
recording.
2) Change the frequency of the input signal to 10 kHz, record
and playback; adjust RT-105 (L ch), RT-205 (R ch) so that
the characteristic standards meet the following diagram
when compared to the 1 kHz signal output level.
(The other TAPE POSITIONS will automatically be adjusted
by finishing of the foregoing adjustments.)
Dolby C Record/Playback Overall Frequency Response
20 50 100 200 500 ik 2k 5k 1Ok. 14k = 20K (Hz)
.
Tape
1
AC-514
Dalby NR Onc
Level : —20dB From Dolby Level
(2)
Adjusting
the
record/playback
levels
(HIgh)
(3)
Checking
the
Dolby
C
record/playback
overall
frequency
re-
1) Load a AC-514 tape and after having recorded a signal of sponse
“1
kHz
(—20
dB),
play
it
back.
1)
Set
the
DOLBY
NR
switch
to
the
”C”
position.
2)
Adjust
RT-103
(L
ch)
and
RT-203
(R
ch)
so
that
the
output
2)
Using
the
test
tapes
AC-514,
perform
record/playback
in
from the line out terminal has the same value as the output the same manner as 5-(1).
when
monitoring
the
recording.
3)
Check
to
make
sure
that
the
record/playback
overall
fre-
quency response meets the specifications in the diagram.
Record /Playback Overall Frequency Response
20 50 100 200 500 1k 2k Sk 10K 14k = 20k (Hz)
Tape 1 AC-514
Dolby NA : Off
Level + —20d8 From Doiby Level
PCS
87614
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