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SERVICE MANUAL
PK
001627
HAMAMATSU, JAPAN
CONTENTS
SPECIFICATIONS
.............................................. 3/4
PANEL LAYOUT
...................................... 5
PSR-740 BLOCK DIAGRAM
.... 6
PSR-640 BLOCK DIAGRAM
.... 7
CIRCUIT BOARD LAYOUT
................. 8
DISASSEMBLY PROCEDURE
............................. 10
LSI PIN DESCRIPTION
............................... 14
IC BLOCK DIAGRAM
.................................. 19
CIRCUIT BOARDS
........................................ 20
TEST PROGRAM
............................. 25/27
DATA INITIALIZATION
.......................................... 29
ALERT MESSAGE LIST
................... 30/32
MIDI DATA FORMAT
................. 34
PSR-740 MIDI IMPLEMENTATION CHART ......................... 49
PSR-640 MIDI IMPLEMENTATION CHART ......................... 50
PARTS LIST
OVERALL CIRCUIT DIAGRAM
PSR-740
PSR-640
PSR-740 19990901-160000
PSR-640 19990901-120000
1.82K-9201
Printed in Japan ‘99.08
Summary of Contents for PortaTone PSR-640
Page 4: ...4 PSR 740 PSR 640 ...
Page 22: ...22 PSR 740 PSR 640 DM Circuit Board PSR 640 Component side Pattern side 2NA V350510 1 2 1 ...
Page 27: ...27 PSR 740 PSR 640 ...
Page 28: ...28 PSR 740 PSR 640 ...
Page 32: ...32 PSR 740 PSR 640 ...
Page 33: ...33 PSR 740 PSR 640 ...