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Yamaha PortaTone PSR-A300 Service Manual

Yamaha PortaTone PSR-A300
40 pages
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PSR-A300
1
Copyright (c) Yamaha Corporation. All rights reserved. PDF-K556
’05.07
SERVICE MANUAL
HAMAMATSU, JAPAN
CONTENTS
SPECIFICATIONS .................................................................3
PANEL LAYOUT ..................................................................4
CIRCUIT BOARD LAYOUT & WIRING ................................5
BLOCK DIAGRAM ................................................................6
DISASSEMBLY PROCEDURE .............................................7
LSI PIN DESCRIPTION....................................................... 12
IC BLOCK DIAGRAM .........................................................14
CIRCUIT BOARDS ..............................................................15
TEST PROGRAM ...............................................................21
BACKUP & INITIALIZATION .............................................24
TRANSFERRING DATA BETWEEN
THE PSR-A300 and a COMPUTER ...................................25
MIDI IMPLEMENTATION CHART .....................................27
MIDI DATA FORMAT .........................................................28
PARTS LIST
OVERALL CIRCUIT DIAGRAM
PK
001738

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Yamaha PortaTone PSR-A300 Specifications

General IconGeneral
Number of Keys61
Keyboard TypeStandard
Touch SensitivityYes
Polyphony32
DisplayLCD
Amplifiers2.5W + 2.5W
Speakers12 cm x 2
EffectsReverb, Chorus
ConnectorsHeadphones, AUX IN, USB
Power SupplyAC Adaptor

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