Yamaha SY77 Service Manual

•
CONTENTS
(S>^)
SPECIFICATIONS
2
PANEL LAYOUT
!•)
4
CIRCUIT
BOARD LAYOUT (^--y
I-
h)
6
BLOCK DIAGRAM
{-^
u
-j
9
7
^
7
L.)
8
DISASSEMBLY
PROCEDURE
10
ASSEMBLY PRECAUTIONS
15
LSI
PIN
DESCRIPTION
17
1C
BLOCK DIAGRAM Ocya-y^m)
23
CIRCUIT
BOARDS
(->-t-»^5EI)
25
ERROR MESSAGES (x-7->
-y-b-v)
44
TEST
PROGRAM
(t^:^
I-
^^7
A)
48/72
MIDI
DATA
FORMAT
(MIDI
t'- 5?7
;r-V'y
h)
94
MIDI
IMPLEMENTATION
CHART
111
PARTS
LIST
YAMAHA
CORP.
HAMAMATSU. JAPAN
2.27K-885
©
Printed in
Japan
'90.01
SY77