Denon DP-60L Service Manual

1.
Adjustment
of
spacing
between
detection
head
and
platter:
Adjust
the
spacing
so
that
it
may
represent
abt.
0.15
mm
between
the
magnet-coated
surface
of
platter
and
detection
head.
Depending
upon
the
degree
of
the
spacing,
the
condition
of
stop
will
vary.
Con-
sequently,
adjustment
should
be
made
in
such
a
way
that
the
platter
without
the
turntable
sheet
on
glides
slightly
forward
when
stopping.
NOTE:
When
the
magnetic
head
is
replaced,
make
sure
that
the
terminal
connection
is
as
shown
in
the
figure
below.
Other-
wise,
the
platter
may
turn
reversely.
HOT (RED)
IP GND
(3
(WHT) “fo | ae
S , D)
awe 7 HOT
GND
Head connection
2.
Confirming
the
regulator
voltage:
Since
the
power
source
employs
a
fixed
voltage
3-
terminal
IC,
confirm
that
the
output
voltage
of
IC5
and
represents
5V+0.2V.
(No
adjustment
is
feasible.)
3.
RPM
Adjustment:
(1)
Pull
out
the
lead
wire
through
test
points
39
and
41
(3P
connecting
pin)
on
motor
servo
P.C.
Board
KU-385
and
connect
39
to
positive
side
of
the
oscilloscope
while
41,
earth
side.
(2)
Adjust
the
speed
to
45
RPM;
observing
the
wave-
form
by
means
of
an
oscilloscope,
Adjust
VR2
so
that
the
pulse
may
occur
at
the
40%
position
from
the
left
of
the
pulse
side
of
the
half-cyctle
in
a
cycle
of
a
square
wave
as
shown
in
the
figures
below.
(3)
Subsequently
adjust
VR1
for
33
RPM
in
the
same
manner
as
in
the
case
of
45
RPM
so
that
the
pulse
may
be
positioned
at
40%
of
the
square
wave
cycle.
|
40 % 60 %
7.2 ms (33 rpm)
5.3 ms (45 rpm)
(Reference)
Following are the waveforms of test points 39-40
and 41—40: (Test Point 40 is grownd.)
7.2 ms (33 rpm)
5.3 ms (45 rom)
5V 5V
39—40 41—40
_Arm lifter height adjustment: |
Arm lifter is so designed as to move upward and
downward together with the arm when its height is
adjusted. Although the adjustment is carried out in
the plant before shipment, if re-adjustment ts required,
the height can be re-adjusted in the following manner:
(1) Loosen the arm lifter height adjusting screws
Depress lifter button to light the cueing lamp
and lower the arm lifter.
(2) Place the stylus point on the record surface and
- adjust the clearance between the arm lifter and
arm tube to be 0.5~1.0 mm by moving the arm
lifter vertically, and then tighten the height
adjusting screw.
Arm tube
Clearance 6.5~1.Omm
5.
Arm lifter
Arm lifter height adjusting screw
End adjustment (lead-out adjustment):
The end adjustment has been carried out in the plant
prior to shipment with respect to the straight arm
tube. If, however, re-adjustment is required, adjust in
the following manner: |
(1) Turn the anti-skating knob to ‘0’. ;
(2) Confirm that the cueing lamp .is off. If it is lit,
depress the lifter button so that the arm lifter is
kept up.
(3) Set the cartridge stylus point to position 53 mm
from the motor shaft by the use of accessory
overhang gauge.
(4) Turn the lead-out adjusting screw with a screw-
driver so as to allow the lead-out adjusting indi-
cator to light.

Denon DP-60L Specifications

General

Brand	Denon
Model	DP-60L
Category	Turntable
Language	English