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Pioneer PL-400 Service Manual

Pioneer PL-400
30 pages
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RECEIVEDMAY
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This seruice
manual describes
the mechanical operations
and
adjustments,
and the D.D.
motor employed
in the
following
models.
STEREO
TURNTABLE
PLI
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FL-ElcIcIX
PLI?55
PLISOO
PL-3clcIX
PLI 4ocl
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PICINEEFI E-ECTFIONIC
CCIFIFEIF|ATICIN
4-1.
Mesu.o
1-chome. rvesuno-ku, Tokyo 153. Jap6n
lr.g. P|q\IEEF ELEST':EINICB OGIPCFIATION
85
Oxfotu
O.,ve, Moonach,e, New
Jereey O7O7A, U.S
A:
PIChIEEFI ELECTFIO TIC
(Et-FleEl
N,V. Lurthagen-Haven
g,
2OS AnEwerp,
Elelgrum
PIO\|EEF| ELECTFIONICB
AIJATFaALIA
FYY.
LTO.
178-184
E]ounda.y Road, Elnaesde, VcEonra
3195,
AusE.6l6
<ART-467-0>
r'@ocr.
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Printed
in
Japan
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Pioneer PL-400 Specifications

General IconGeneral
Drive SystemDirect Drive
Wow and Flutter0.025% (WRMS)
Signal to Noise Ratio78 dB
Effective Length221 mm
Overhang15.5 mm
Weight6.5 kg
Turntable PlatterAluminum Diecast
Speeds33 and 45rpm
Tonearm TypeStatic-balanced type
Cartridge TypeMoving Magnet (MM)
Platter Diameter300 mm
MotorQuartz PLL DC Servo Motor

Summary

PL-200 Panel Facilities and Controls

PL-255 Panel Facilities and Controls

PL-400 Panel Facilities and Controls

PL-300 Panel Facilities and Controls

Disassembly Procedures

Panel and Base Plate Disassembly

Steps for removing the turntable's panel and base plate.

D.D. Motor and Tonearm Removal

Instructions for detaching the direct drive motor and tonearm assembly.

Panel and Base Plate Assembly

PL-200 and PL-300 Assembly

Guide for assembling the panel and base plate for PL-200 and PL-300 models.

PL-255 and PL-400 Assembly

Guide for assembling the panel and base plate for PL-255 and PL-400 models.

Circuit Descriptions and Block Diagrams

Block Diagram for PL-300 and PL-400

Schematic overview of electronic circuits for PL-300 and PL-400 models.

Motor Operation Principles

Detailed explanation of the direct drive motor's construction and rotation.

PD1003 IC Oscillator Stage Operation

Description of the PD1003 IC's function in the oscillator stage.

PA2004 IC Comparator Control Operation

Explanation of the PA2004 IC's role in comparator control.

PA2005 IC Drive Control Operation

Details on the PA2005 IC's function in controlling the drive system.

Block Diagram for PL-200 and PL-255

Schematic overview of electronic circuits for PL-200 and PL-255 models.

Mechanism Descriptions and Operation

PL-200 Mechanism Operation

Description of the PL-200's automatic start and auto-return mechanisms.

PL-400 Mechanical Operation

Explanation of the PL-400's lead-in and auto-return mechanical functions.

Adjustment Procedures

Stylus Descent Position Adjustment

Guide for adjusting the stylus drop position for automatic play.

Auto Return Adjustment

Procedure for calibrating the tonearm's auto-return function.

D.D. Motor Adjustment (PL-300/PL-400)

Steps for adjusting the direct drive motor speed for specific models.

D.D. Motor Adjustment (PL-200/PL-255)

Steps for adjusting the direct drive motor speed for specific models.

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