Yamaha PORTATONE PSR-E303 Service Manual

PSR-E303/YPT-300
1
Copyright (c) Yamaha Corporation. All rights reserved. PDF-K467 ’05.05
SERVICE MANUAL
HAMAMATSU, JAPAN
CONTENTS
SPECIFICATIONS .................................................................3
PANEL LAYOUT ..................................................................4
CIRCUIT BOARD LAYOUT & WIRING ................................5
BLOCK DIAGRAM ................................................................6
DISASSEMBLY PROCEDURE .............................................7
LSI PIN DESCRIPTION....................................................... 11
IC BLOCK DIAGRAM .........................................................13
CIRCUIT BOARDS ..............................................................14
TEST PROGRAM ...............................................................18
BACKUP & INITIALIZATION .............................................20
TRANSFERRING DATA BETWEEN
THE PSR-E303/YPT-300 and a COMPUTER .....................21
MIDI IMPLEMENTATION CHART .....................................23
MIDI DATA FORMAT .........................................................24
PARTS LIST
OVERALL CIRCUIT DIAGRAM
PK
001734
/
PSR-E303
YPT-300

Yamaha PORTATONE PSR-E303 Specifications

General

Number of Keys	61
Display	LCD
MIDI	Yes
Polyphony	32
Voices	482 voices
Styles	106
Effects	Reverb, Chorus
Songs	102
Power Supply	PA-3C/PA-130 or 6 x AA batteries
Connections	Headphones, MIDI In/Out, Sustain Pedal