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Denon DP-59L Service Manual

Denon DP-59L
18 pages
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Fi
Component/Record
Player
UAL
SERVO-CONTROLLED
ECT
DRIVE
RECORD
PLAYE
MODEL
DP-59L
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Denon DP-59L Specifications

General IconGeneral
Drive SystemDirect Drive
MotorAC Servo Motor
Wow and Flutter0.008% WRMS
Platter Size300 mm
Effective Tonearm Length244 mm
Speed33 1/3, 45 rpm
PlatterDie-cast aluminum
Tonearm TypeStatic balance type (interchangeable)

Summary

Denon DP-59L Service Manual Overview

Denon DP-59L Key Features

Electronic Q-damping (Dynamic Servo Tracer)

Electronically damped resonance for optimized stereo imaging and reduced noise.

Low-mass Straight Tonearm Tube

Dual construction arm tube reduces resonance, improving tracing ability and clarity.

Precision Turntable Platter

Thick platter minimizes vibrations for clear sound reproduction and acoustic characteristics.

Quartz-Lock Speed Control

Utilizes PLL method for precise speed control, maintaining accuracy within +/-9.9%.

High-Performance Rotational Characteristics

Features AC servo motor and quartz lock for low wow/flutter and high S/N ratio.

Auto-Lift Mechanism

Automatically lifts stylus and stops rotation at record end to prevent stylus wear.

Wood Cabinet Design

Features a mirror-finish surface and improved insulators to prevent howling.

Interchangeable Tonearm Tubes

Allows quick cartridge matching via standard 4-pin connectors.

Denon DP-59L Main Specifications

Denon DP-59L Block Diagram

Denon DP-59L Parts and Functions

Power Switch Operation

Controls power supply activation and arm lift movement.

Start/Stop Button Control

Manages turntable rotation and arm lifter engagement.

Lock Indicator Function

Indicates stable turntable speed lock and transitional states.

Speed Selection Buttons

Allows switching between 33-1/3 rpm and 45 rpm speeds.

Arm Lifter Button

Controls the vertical movement of the tonearm.

Pitch Control Adjustment

Provides precise speed adjustment via the quartz-lock system.

Anti-Skating Knob Adjustment

Compensates for inward stylus pull during record playback.

Q Damping Knob

Adjusts tonearm damping based on stylus force settings.

Weight Ring for Tonearm Balance

Used to achieve zero balance for the tonearm.

Arm Rest and Lock

Secures the tonearm in place, disengaging the lock when moved.

Microprocessor Explanation

Motor Control IC and Outputs

Explains IR3T05 IC functions for motor control, stop output, and lock indicator.

Speed Indicator and RPM Selector

Details speed indication, rpm selector inputs, and associated signals.

Microprocessor Terminal Functions (Part 1)

Describes various FG, PD, and F/V output terminals and their signal characteristics.

Microprocessor Terminal Functions (Part 2)

FG II and F/V Terminal Outputs

Details FG II output, F/V output, and F/V triangular wave signals.

PD Triangular Wave and Sample Pulse

Explains PD triangular wave, sample pulse monitor, and PD hold terminals.

Lock and Direction Detector Outputs

Describes lock detector time set, direction detector output, and revolution detector.

LF3735 PLL Speed Control Terminals

LCD Segment and RPM Selector Inputs

Explains LCD segment outputs and rpm change inputs for speed control.

Speed Adjustment Key Inputs

Details UP, DOWN, and NORMAL key inputs for speed adjustment.

Crystal and Reference Frequency

Describes crystal inputs for 4.5MHz oscillation and reference frequency output.

VCO Input and Power Supply

Explains voltage controlled oscillator input and power supply voltage.

LF3735 PLL Speed Control Terminals (Continued)

L.P.F. Output and Input

Details L.P.F. output for ripple signal and L.P.F. input for VCO control.

Phase Difference Detection

Explains phase difference detection output and GND terminal.

Test, ACL, and LCD Outputs

Describes TEST terminal, ACL state, and LCD segment outputs.

Denon DP-59L Adjustment Procedures

Head Gap Adjustment

Ensures proper perpendicularity of the detection head to the turntable surface.

Speed Lock Adjustments (33/45 RPM)

Adjusts VR1 and VR2 for correct speed lock indication at 33 and 45 RPM.

Horizontal Amp Off-set Voltage

Adjusts VR3 for zero offset voltage in the horizontal amplifier.

Lifter Amp Off-set Voltage

Adjusts VR4 for zero offset voltage in the lifter amplifier.

End Detecting Position Adjustment

Adjusts the cam for correct end-of-record detection position.

Denon DP-59L Parts List (Exploded View)

Denon DP-59L Exploded View Diagram

Denon DP-59L Schematic Diagram

Servo Control Board (KU-5601/5602) Layout

Servo Control Board Parts List

Power Supply Board (PS-1670/1680) Layout

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