Contents
Precautions ············································································································· 1
Features of This Unit ································································································ 2
Before Use ·············································································································· 4
Names and Functions ······························································································ 6
How to Assemble ·································································································· 10
Connections ·········································································································· 14
Operations ············································································································· 16
Block Diagram ······································································································· 17
Specifications ········································································································ 18
Before Asking for Repair ························································································ 19
BELT DRIVE ANALOG PLAYER PD-171AL
Precautions
Installation place
• Install this unit in a horizontal and stable place where the
unit is less subject to external vibration.
• Do not install this unit near a television or color monitor.
Keep this unit away from such devices as cassette decks
that are subject to magnetism.
Do not move this unit during playback.
Moving this unit during playback may cause needle jump, and
damage the needle and record thereby.
When moving this unit
For moving this unit, be sure to turn off the power after stop-
ping the platter and removing the record.
Next, unplug the power and phono cables and move this unit.
Avoid the following locations for installation.
• Locations exposed to direct sunlight
• Places subject to humidity and with less ventilation
• Places where are extremely hot or cold
• Places subject to vibration
• Places subject to dust
• Places subject to oil, steam, and heat (such as kitchens)
Do not put articles.
Do not put articles on this unit.
Lubrication
Do not lubricate this unit yourself because special oil is used
for the spindle.
Cleaning
• Usually, wipe the unit with a dry soft cloth.
When the dirt is hard to remove, dip soft cloth in detergent
diluted 5 or 6 times with water, wring it well, and remove
contaminants. Then, remove the moisture with dry cloth.
• Be aware that acrylic portions such as dust cover may be
damaged if the portions are rubbed hard.
• Be aware that printed or painted portions may be damaged
if the portions come into contact with alcohol, thinner, ben-
zine, insecticide, or the like. In addition, do not let this unit
contact a rubber or plastic form for a long time. That may
damage the cabinet surface of the unit.
• When using a chemical cloth for cleaning, read the caution
provided with the chemical cloth product.
• Be sure to unplug the power cable from the outlet before
cleaning.
Repair and adjustment
When repair and adjustments are needed, please ask the
dealer where you bought the unit.
To avoid heat emission
Do not place this unit on such device as an amplifier that may
emit heat. If the unit is installed on a rack, install the unit as
distantly as possible from where the amplifier is installed so
as to avoid heat emission from the amplifier and other audio
devices.
Dew condensation
Be aware that condensation may occur when this unit is
moved from a cold place to a warm place especially in win-
ter or when the temperature of the room where this unit is
installed is quickly raised with a heater or the like. It depends
on the condensation state, however, this unit can be used af-
ter disappearance of water droplets by turning on the power
and leaving the unit as it is for 1 to 2 hours to keep the unit at
room temperature.
Even in summer, dew condensation can occur if this unit is
directly exposed to cool air from an air conditioner. In such a
case, the installation place should be changed.
1
Features of This Unit
Belt drive
We have introduced a drive system in which motor-derived
noise is attenuated via a belt and smooth rotation is achieved.
Circuit configuration
AC synchronous motor is driven by sine waves coming from
32-bit microprocessor, which are DA converted and amplified
by a high-power audio amplifier.
Stroboscope
This unit is equipped with a reflective view type LED stro-
boscope that is useful for adjusting the rotation speed in a
precise manner.
High torque motor
An AC synchronous motor with high torque is adopted to
achieve precise and quiet rotation.
Heavyweight platter
The platter weighs 5.0 kg, which is machined from aluminum
metal to improve accuracy.
2
Approximately 0.7 t·cm
achieved.
of moment of inertia has been
High rigidity main chassis
This unit uses an underslung vibration-damping structure ca-
pable of hanging internal main parts using machined alumi-
num plate with 15 mm in thickness as a base.
2
BELT DRIVE ANALOG PLAYER PD-171AL
Large-sized spindle
This large-diameter spindle is equipped with polyether ether
ketone (PEEK) bearing of ball bearing specification that pro-
vides stable rotation.
Floating mount
The power transformer and motor are floated from the main
chassis to isolate vibration to the top board.
Hybrid vibration damping
The bottom face of the cabinet has a hybrid vibration-damp-
ing structure made of wood and metal for resonance disper-
sion.
Large-sized insulator
This unit adopts a damper as an insulator that is a combina-
tion of rubber and spring, made from different materials to
isolate unnecessary vibration coming from an audio rack or
others.
Unnecessary vibration from the main chassis itself is also
suppressed.
LED stylus light
The detachable high-intensity LED stylus light is supplied for
operation in the dark.
AC inlet
Power-cable-detachable AC inlet.
3
BELT DRIVE ANALOG PLAYER PD-171AL
• Arm base cover removal wrench (3.0 mm)
• Phono cable securing cushion
• Dustproof cap for stylus light connector
* This cap is mounted on the main unit at shipment.
• Printed matters
Safety cautions
Owner’s Manual (this document)
• Power cable
5
Names and Functions
Top view
7
1. Operation switch (OPERATION)
This switch turns on and off the power.
2. Operation indicator
This indicator lights up when the power is turned on.
3. Start/stop switch (start/stop)
This switch starts rotating the platter at the selected rotation
speed.
This switch also stops platter rotation while the platter is
rotating because this switch serves as both start and stop
switches.
6