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

Yamaha SY77 Specifications

General

Polyphony	16 voices
MIDI	In, Out, Thru
Year Released	1989
Synthesis Type	AFM Advanced Frequency Modulation, AWM2 Advanced Wave Memory 2
Timbrality	16
Keyboard	61 keys
Effects	Reverb, Chorus, EQ
Sequencer	16 tracks
Display	LCD
Oscillators	6 operators
LFO	2 LFOs
Filter	resonant multimode filter
Memory	64 preset voices, 64 user voices
Storage	3.5" floppy disk drive
Outputs	Stereo
Connections	Foot controller, Foot Switch
Type	Digital