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Denon DP-57L Service Manual

Denon DP-57L
24 pages
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Denon DP-57L Specifications

General IconGeneral
MotorDC Servo Motor
Overhang15 mm
Speeds33, 45 rpm
PlatterAluminum
Wow and Flutter0.025%
Signal-to-Noise Ratio78 dB
TonearmStatic balance type

Summary

Names of Parts and Function

Power Switch

Controls the power ON/OFF state and affects tonearm movement when ON.

Stop Button

Initiates the stop sequence, turning off lamps and stopping rotation.

Start Button

Initiates playback for 33 or 45 rpm records, lowering the tonearm.

Lifter Up/Down (Cueing) Button

Controls the vertical movement of the tonearm, with an indicator lamp.

Anti-skating Knob

Compensates for the inward stylus pull during record playback.

Q Damping Knob

Adjusts damping based on stylus force for optimal performance.

Block Diagram

Microprocessor Explanation

Adjustment Procedures

Tonearm Control Adjustments

Covers off-set voltage and end detecting position adjustments.

Phono Motor Speed Adjustment

Procedure for adjusting turntable speed using test points and VRs.

Important Notes and Warnings

Safety Warnings

Covers component parts and leakage current safety precautions.

Parts Lists by Unit and Group

KU-4590 Lifter Servo Unit Parts

Component list for the KU-4590 Lifter Servo Unit.

Exploded View of Main Parts (DP-57L/62L)

Exploded View of Main Parts (DP-67L/72L)

Exploded View of Tonearm (DP-57L/62L)

Exploded View of Tonearm (DP-67L/72L)

Connections of P.W. Board (DP-57L/67L)

Schematic Diagram (DP-57L/67L)

Connections of P.W. Board (DP-62L/72L)

Schematic Diagram (DP-62L/72L)

P.W. Board Layout (KU-4650/5050 Motor Servo Unit)

P.W. Board Layout (KU-4680/5040 Motor Servo Unit)

KU-4590 Lifter Servo Unit P.W. Board

Power Supply Unit P.W. Board

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