Marantz cp430 - Playback Noise Measurement; MPX Filter Adjustment; Record;Playback Frequency Response and Recording Level Adjustment; Aligniment. Ponts

5.6 Playback Noise Measurement NS ORF 5.9 Alignment Points
1. Set the selector switch to NORMAL and NR switch to ae ae
side 40Hz 250Hz lOKHz 12 SKHz
2. Play back the blank tape and make sure that the noise :
volume is below 2mV when the REC LEVEL Knob is
set to both maximum and minimum. DOLBY BNR
1. Perform measurements when the power hum is at mini- 250Hz IOKHz 12. 5KHz Hi ay "
mum.
e
4
>
2. Perform measurements under conditions where induc- Cin ee > OF le
tion noise will not affect measurements. :
ok =
[CrO,] us jens @ seat
5.7
MPX
Filter
Adjustment
1.
Set
the
tape
selector
switch
to
CrO2.
N
iy
1. Adjust the tape selector switch to NORMAL. 2. Insert the AC-512 test tape in the cassette holder and Tes
2. Put the blank tape in the cassette holder, and set the set the recording conditions. Attenuate from 500mV to ;
:
we
MPX
Filter:
ON)
—25dB
on
Line
Out
with
the
attenuator
and
record
at
A
Po
BIOs ies tie Source pastsiore.| nats 1kHz, 10kHz, 12.5kHz and 15kHz on an unrecorded ey ony
3.
Add
a
1kHz,
—20dB
signal
to
LINE
IN.
Adjust
the
Rec.
section
of
the
tape.
aN
<
NG
gm
Volume knob r0 OgB Level Meter reading. - . Record and playback at 1kHz, 10kHz, 12.5kHz and dR, f mo Fr
4.
Set
the
input
signal
at
19kHz
+10Hz.
Adjust
L602(L)
15kHz.
Make
sure
results
comply
with
the
following
f
ng
a:
Ze
is
and LG61(R) to the minimum level.
If the value is 40dB or more, the adjustment is com-
pleted.
Mode: record
diagram.
NR “OFF”
8dB
1OKH
z
12, 5KHz
ISKHz
NR “ON”
[fe
|
i
250Hz 1OKHz
12. 5KHz
Se,
TILLY,
a,
rt ;
r
é
SSO. z
Mea
se
[METAL]
1. Adjust the Tape Selector Switch to METAL.
2. Load the test tape AC-712 into cassette holder. Perform
measurements as with CrO., and make sure they con-
form with the Chart.
5.8 Record/Playback Frequency Response and
Record Level Adjustment
[NORMAL]
. Set the tape selector switch to NORMAL.
. Set the MPX filter to OFF and Dolby NR to Dolby B.
3. Insert the AC-212 test tape in the cassette holder and set
the recording conditions. Set the monitor switch to
SOURCE
and
attenuate
from
1kHz,
500mV
to
—25dB_
lOKH>
on
Line
Out.
12.5KHz
4. Set the monitor switch to TAPE and adjust RLO7(L)
and RLO8(R) so that the level for 1kHz and 10kHz is
brought within +0.5dB.
5.
Adjust
RK41(L)
and
RK42(R)
so
that
the
level
of
1kHz
[
be
|
is
the
same
when
the
monitor
switch
is
changed
from
SOURCE
to
TAPE.
eae
lOKH2
"12.
SKHz
6. After making these adjustment, record and playback at
NOTE:
1kHz, 10kHz, 12.5kHz. Make sure results comply with
the following diagram. Adjustment points for NORMAL, CrO,, METAL are
common with CB01(L) and CB02(R).
_
NR “OFF”
nN
8dB
ISKHz