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Yamaha PX-2 Service Manual

Yamaha PX-2
28 pages
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Yamaha PX-2 Specifications

General IconGeneral
Drive SystemDirect drive
Speed33 1/3, 45 RPM
MotorDC servo motor
PlatterAluminum
Tracking Force Range0 to 3g
Wow and Flutter0.025% WRMS
Signal-to-Noise Ratio78dB
CartridgeNot included

Summary

Panel Operation

Internal View

Disassembly Procedure

Main Unit Disassembly Steps

Procedures for removing the bottom cover and key internal assemblies.

Component Board Removals

Steps to remove motor servo, fuse, and power switch boards.

Disassembly of Tonearm Assembly

Tonearm Removal

Procedure for detaching the tonearm from its base.

Drive Motor Removal

Instructions for removing the drive motor assembly.

Adjustment

Phonomotor Synchronization

Adjusting the motor's speed synchronization for accurate playback.

Quartz Synchronization

Specific adjustment for quartz lock synchronization.

Control Circuit and Tonearm Unit

Adjusting electronic circuits and tonearm positioning.

Tonearm Angle Adjustment

Calibrating the tonearm angle in raised and lowered positions.

Tonearm Position Detecting Adjustment

Adjusting the mechanism for detecting tonearm position.

Auto-Up at Tonearm Lead-Out Groove

Adjusting the auto-up function at the record's lead-out groove.

Tonearm Driving Speed Adjustment

Calibrating the speed of tonearm movement.

Normal Tonearm Driving Speed

Specific adjustment for normal tonearm driving speed.

Block Diagram

Logic Control IC: YM-294

Pin Arrangement and Input Signals

Configuration of YM-294 pins and explanation of input signals.

Command and Output Signals

Description of automatic commands and output signals from the YM-294.

IC Functional Block Diagram

Timing Chart

Specifications

Tonearm Section Specifications

Detailed specifications for the arm's type, length, and tracking force.

Rotary Section Specifications

Technical data for the motor, platter, and drive system.

Control and General Specifications

Details on automatic functions, power, and physical dimensions.

Wiring

Schematic Diagram

Exploded View (All over)

Parts List (All over)

Exploded View (Tone Arm)

Parts List (Tone Arm)

Parts List (Circuit Board)

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