Yamaha Portatone PSR-9000 Service Manual

CONTENTS
SPECIFICATIONS ................................................................. 3
PANEL LAYOUT..................................................................... 5
UNIT LAYOUT........................................................................ 6
WIRING .................................................................................. 7
BLOCK DIAGRAM ................................................................. 8
DISASSEMBLY PROCEDURE .............................................. 9
LSI PIN DISCRIPTION........................................................... 15
IC BLOCK DIAGRAM............................................................. 23
CIRCUIT BOARDS ................................................................ 26
TEST PROGRAM................................................................... 37
POWER ON RESET............................................................... 40
TROUBLESHOOTING ........................................................... 41
MIDI IMPLEMENTATION CHART ......................................... 43
PARTS LIST
SERVICE MANUAL
PK
001628
1.45K-*** Printed in Japan '99.11

Yamaha Portatone PSR-9000 Specifications

General

Sequencer	16-track sequencer
Effects	Reverb, Chorus, DSP
Storage	Floppy disk drive
Type	Arranger Workstation
Display	Large LCD
MIDI	In/Out/Thru
Keyboard	61 keys, touch response
Connectivity	AUX OUT
Power Supply	AC adapter
Styles	Over 300 styles