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SILENT SB SERIES
PP
008599
YAMAHA PIANO
SERVICE MANUAL
•U1-Silent
CONTENTS
SPECIFICATION ....................................................................... 2
SWITCH BOX & PEDAL ........................................................... 3
CIRCUIT BOARD LAYOUT ....................................................... 4
WIRING ..................................................................................... 4
DISASSEMBLY PROCEDURE ................................................. 5
LSI PIN DISCRIPTION ............................................................ 10
IC BLOCK DIAGRAM .............................................................. 14
CIRCUIT BOARDS ................................................................. 15
TEST MODE, ADJUSTMENT ................................................. 19
RELOADING THE PROGRAM ............................................... 21
MIDI IMPLEMENTATION CHART ........................................... 23
PIANO MAINTENACE PART .................................................. 24
OVERALL CIRCUIT DIAGRAM
•U1-Silent
(MPU1)
•U3-Silent
•M112-Silent
0.915K-2411 IT
Printed in Japan '02.06