Yamaha Portatone YPT-300 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 YPT-300 Specifications

General

Type	Portable Keyboard
Keyboard	61 keys
Songs	102 preset songs
Display	LCD
Speakers	2 x 2.5W
Polyphony	32 notes
Effects	Reverb, Chorus
Power Supply	PA-3C/PA-130 or 6 x AA batteries
Connectivity	Headphones
Weight	4.9 kg