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Pioneer PL-255 Service Manual

Pioneer PL-255
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.
i979
Printed
in
Japan
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Pioneer PL-255 Specifications

General IconGeneral
Weight5.5 kg
MotorDC Servo Motor
Effective Arm Length221 mm
Overhang15.5 mm
Speed33-1/3, 45 rpm
TonearmStatic-balance type
CartridgeMoving Magnet
PlatterAluminum die-cast
Dimensions420 x 100 x 375 mm
Wow and Flutter0.045% WRMS
Cartridge TypeMoving Magnet (MM)
Signal to Noise Ratio65 dB (DIN-B)

Summary

PL-200 Panel Facilities

PL-255 Panel Facilities

PL-400 Panel Facilities

PL-300 Panel Facilities

Disassembly

Panel and Base Plate Disassembly

Procedure for removing the panel and base plate components.

D.D. Motor and Tonearm Disassembly

Steps for disassembling the direct drive motor and tonearm assembly.

Panel and Base Plate Assembly

PL-200 and PL-300 Assembly

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

PL-255 and PL-400 Assembly

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

Circuit Descriptions

Block Diagram (PL-300, PL-400)

Illustrates the circuit connections for PL-300 and PL-400 models.

Motor Operation Principles

Details the construction and rotational principles of the motor.

PD1003 IC Operation (Oscillator Stage)

Explains the function of the PD1003 IC in the oscillator stage.

PA2004 IC Operation (Comparator Control)

Describes the role of the PA2004 IC in comparator control.

PA2005 IC Operation (Drive Control)

Details the function of the PA2005 IC for drive control.

Block Diagram (PL-200, PL-255)

Illustrates the circuit connections for PL-200 and PL-255 models.

Mechanism Descriptions

PL-200 Mechanism Operation

Explains the operational sequence for the PL-200 mechanism, including start and auto-return.

PL-400 Mechanical Operation

Details the mechanical operation for lead-in and auto-return of the PL-400.

Adjustment Procedures

Stylus Descent Position Adjustment

Guide for adjusting the stylus descent position for automatic play.

Auto Return Adjustment

Procedure for adjusting the auto return mechanism.

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

Steps for adjusting the D.D. motor for PL-300 and PL-400 models.

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

Steps for adjusting the D.D. motor for PL-200 and PL-255 models.

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