Yamaha SPX990 Service Manual

^CONTENTS
(g'^)
SPECIFICATI0NS(J^B-f±^5^)
2/3
PANEL
LAY0UT(/';4'
;uu<
7'0
h
)
4
CIRCUIT
BOARD LAYOUK
zl
-
y
h
U
Y
r
^
I-
)
6
BLOCK
DiAGRAiVl(7'D
8
DIIViENSIONS(-t>=fell])
9
DISASSEMBLY PROCEDURE(:j^m^)iS) 10
LSI
PIN DESCRIPTIONCLSIJSiT^ia^HMa)
14
1C
BLOCK DIAGRAMCICVP
19
CIRCUIT
BOARDS('>-
^
»[U)
20
TEST
PROGRAM
(
7^^
i-
-7^
v A)
26/30
CHECKS
&
ADJUSTMENTS(^^^tllH^li)
34/35
RAM
INITIALIZE(RAMYA'>i^^YX)
36
ERROR MESSAGES(x
5-7
y-tz--7)
36
MIDI
DATA F0RMAT<MID!^--
7 7=1--
V
y
h )
37/42
MIDI
IMPLEMENTATION
CHART
47
PRESET
PROGRAM
LIST
48
OPERATION
MAP
50
PARTS
LIST
SPX990