Yamaha Portatone PSR-540 Service Manual

HAMAMATSU,JAPAN
1.45K-536 I Printed in Japan’99.06
CONTENTS
SPECIFICATIONS ......................................................................................3
PANEL LAYOUT .......................................................................................4
CIRCUIT BOARD LAYOUT .......................................................................5
BLOCK DIAGRAM .................................................................................... 6
DISASSEMBLY PROCEDURE .................................................................7
LSI PIN DESCRIPTION ............................................................................9
IC BLOCK DIAGRAM ............................................................................. 11
CIRCUIT BOARDS .................................................................................. 12
TEST PROGRAM & INITIALIZE ...............................................................16
MIDI IMPLEMENTATION CHART............................................................18
PARTS LIST
OVERALL CIRCUIT DIAGRAM
SERVICE MANUAL
PK 001629

Yamaha Portatone PSR-540 Specifications

General

Display	LCD
Amplifier	5W + 5W
Type	Portable Keyboard
Effects	Reverb, Chorus, DSP
Headphone Jack	Yes
Polyphony	32
Styles	160 styles
Sequencer	6-track
MIDI	In/Out
Speakers	12 cm x 2
Keyboard	61 keys
Connections	MIDI In/Out, Headphones, Sustain Pedal