Denon DP-59L Service Manual

NOTE:
1. Be sure not to interfere with the function of any parts
when connecting the measuring instrument for adjust-
ing. Check that there is no loading resistance or
loading capacity problem. Refer to the following
example for the exact measuring technique.
2. While adjusting or measuring the detecting positions,
close the bottomplate or cover the unit with a black
cloth or paper so that no light enters. Also when
adjusting the speed detector, be sure no magnetic
sources are near and that there are no vibrations.
* Speed Adjustment
Ncc
Oscilloscope
ais
CHI GNO CH2
IR3STOS
20 22
1
_
aa ay
* Keep the wire as short as possible. If it is long, connect
the resistors in series.
WARNING:
1. Component parts
* Off-set Voltage Measurement
P.W. BOARD |
DC VOLTMETER
*
This
distance
should
be
as
short
as
possible.
* FG Signal Check or Wow/Flutter Measurement
IR3TOS
Measuring
equiprnent
By
utilizing
the
legs
of
parts
as
much
closer
to
the
IC
pins
as
possible
to
connect
a
measuring
equipment.
Parts marked with /\ and/or shading in this service manual have special characteristics important to
safety. Be sure to use the specified parts for replacement.
2. Leakage current
Before
returning
the
appliance
to
customer,
test
the
leakage
current
when
the
power
plug
is
connected.
Use
a
calibrated
(with
an
error
of
not
more
than
5%)
leakage
current
tester
and
measure
the
leakage
current
from
any
exposed
metal
to
the
earth
ground.
Reverse
the
power
plug
polarity
and
test
the
above
again.
Any
current
measured
MUST
NOT
EXCEED
0.5
miliamps.
Corrective
measure
must
be
taken
if
it
exceeds the limit.
==

Denon DP-59L Specifications

General

Drive System	Direct Drive
Motor	AC Servo Motor
Wow and Flutter	0.008% WRMS
Platter Size	300 mm
Effective Tonearm Length	244 mm
Speed	33 1/3, 45 rpm
Platter	Die-cast aluminum
Tonearm Type	Static balance type (interchangeable)