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Denon DP-37F Series User Manual

Denon DP-37F Series
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ADJUSTMENT
METHOD
e
PHONO
MOTOR
ADJUSTMENT
1}
2}
3)
4)
5)
8)
7)
8)
9)
2.
1)
2)
3)
Off-set
adjustment
Set
the
X-asis
and
Y-axis
sensitivity
of
the
oscilloscope
to
100mV/cm
by
using
a
10:1
probe.
Connect
the
X-axis
terminal
of
the
probe
with
TP-203
on
the
motor
drive
base
beard
and
the
Y-axis
terminal
of
the
probe
with
TP-204,
Use
pin
No.
8
as
the
ground.
Connect
pin
No.
5
and
pin
No.
8
and
make
a
low
resistance
circuit
on
the
input
terminal.
Stop
the
rotor
at
the
maximum
position
of
the
X-axis
amplitude
of
the
Lissajous’
figure
of
the
oscilloscope
while
turning
the
motor
by
hand,
Set
the
maximum
amplitude
at
the
X-axis
by
adjusting
VR-201.
A=A'
Stop
the
rotor
at
the
maximum
position
of
the
Y-axis
amplitude
of
the
Lissajous’
figure.
7
Set
the
maximum
amplitude
at
the
Y-axis
by
adjusting
VR-202.
B
=B’
Adjust
the
center
of
the
circle
to
+
5OmvV.
Y-axis
4+,
.(100mV}
:
{100mvV)
X-axis
eo
Disconnect
pin
No.
5
and
pin
No.
8
after
adjustment.
Amplitude
adjustment
-
Check
the
X-axis
and
Y-axis
sensitivity
of
the
oscillo-
scope
by
using
£
5V
power
supply.
Remove
the
arm
from
the
arm
rest
and
remove
the
turntable.
Then,
turn
the
motor
with
full
speed.
Set
the
amplitude
of
the
X-axis
and
Y-axis
of
the
Lissajous’
figure
te
15
VP-P
by
adjusting
VR-203
and
VR-204.
Make
sure
that
there
is
no
voltage
difference
between
the
X-axis
and
the
Y-axis..
isveP
1pyPP
.
Center
adjustment
+)
Adjust
the
X-axis
and
Y-axis
sensitivity
of
the
oscillo-
scope
to
2V/cm,
2)
Set
the
amplitude
of
the
X-axis
and
Y-axis
of
the
Lissajous’
figure
to
exactly
the
same
point
from
the
center
by
adjusting
VR-205
and
VR-206.
After
the
adjustment,
the
amplitude
should
be
as
shown
in
the
figure
below,
Figure
7.6V+0,4V
4.
Adjusting
the
head
gap
Adjust,
so
that
the
gap
between
the
turntable
magnetic
coating
surface
and
the
detection
head
is
0.18
mm.
5.
Checking
the
33
r.p.m.
and
45
r.p.m.
locks
From
now
on,
use
test
point
TP-1
of
the
servo
control
circuit
board
as
the
earth
reference
point
of
the
measuring
instrument.
1)
Connect
an
oscilloscope
to
test
point
TP-6.
2)
Make
sure
to
check
that
the
voltage
of
TP-6
at
normal
speed
is
approximately
2.2
V,
, :
Vang
=
22V

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Denon DP-37F Series Specifications

General IconGeneral
BrandDenon
ModelDP-37F Series
CategoryTurntable
LanguageEnglish

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