Pioneer PORTATONE PSR-280 User Manual

SERVICE MANUAL
PK
001641
HAMAMATSU, JAPAN
1.43K-257 Printed in Japan '00.06
CONTENTS
SPECIFICATIONS···································································· 3
PANEL LAYOUT······································································· 4
CIRCUIT BOARD LAYOUT ······················································ 6
BLOCK DIAGRAM···································································· 8
DISASSEMBLY PROCEDURE················································· 9
LSI PIN DESCRIPTION·························································· 12
IC BLOCK DIAGRAM ····························································· 14
CIRCUIT BOARDS ································································· 15
TEST PROGRAM ··································································· 24
DATA INITIALIZATION··························································· 26
MIDI IMPLEMENTATION CHART·········································· 27
PARTS LIST
OVERALL CIRCUIT DIAGRAM
This document is printed on chlorine free (ECF) paper with soy ink.
PSR-280
PSR-282

Pioneer PORTATONE PSR-280 Specifications

General

Brand	Pioneer
Model	PORTATONE PSR-280
Tones	100
Styles	100
Type	Electronic Keyboard
Effects	Reverb
Connections	Headphones

Summary

SPECIFICATIONS

Technical Features

Covers keyboard, display, voice, sound, effects, MIDI, power, and dimensions.

PANEL LAYOUT

Front Panel Controls

Identifies and describes the function of each front panel control.

BLOCK DIAGRAMS

System Architecture

SERVICE PROCEDURES

Disassembly Guide

Step-by-step instructions for removing the unit's exterior and internal components.

Keyboard Assembly

TEST PROGRAM

Test Execution and Results

Guides on entering, executing, and interpreting system diagnostic tests.

DATA INITIALIZATION

Factory Reset

PARTS LIST

Component Breakdown