Yamaha PortaSound PSS-125 Service Manual

SERVICE MANUAL
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■ CONTENTS
SPECIFICATIONS . 2
PANEL LAYOUT . 3
CIRCUIT BOARD LAYOUT . 4
LSI DATA TABLE . 5
1C BLOCK DIAGRAM . 5
DISASSEMBLY PROCEDURE. 6
TEST PROGRAM . 9
CIRCUIT BOARDS. 10
OVERALL CIRCUIT DIAGRAM . 12
PARTS LIST
YAMAHA CORP.
HAMAMATSU, JAPAN
1,048K-071 K Printed in Japan '89. 8