Yamaha SPX990 Service Manual page 25

SPX990
xXh6
JEL'-'a
—
U
— x>
-y
^
Ltto
•rX^
9
xX
r7,
H*'E.8^T'f-x
y
LT.
(cfML^to
(D^IJini
(H^irlinitn
(cx>:D-r^i0il$E}-a±?-it^1-o
diag^^vIo
TEST
R-ENC
R
OK
tx
[UJ'^StVi'x
y
^
LXhili^.
')
^ to
^X
y
LCDU "CHECK
NOT
END"
(2)&-;ji'ri]
(;[x,iir;ft[ui
'n
to
OK<7)II^[HiJX'^-34t^?'Tr'5
to
DIAG~Wo
TEST
R-ENC
OK
T-X
h
7
MIDlAtbtl-^i
MIDI
IN;it/'.
MIDI
OUT^It-^mt
l^0jr-tx
y
:?
L
^to
m
MIDIX
i y
t(i.
MIDI OUTiRijC
MIDIINEMIDIOUT^MIDiy-v-yUTiSli^LTii
#
^to
(l)OKcoiR'i=(±.
DIAG
VI
.0
TEST
MIDI
OK
(2)MIDIOUTU/jv;jL;^^I|-#*EMIDIIN$tMlLTCPU
T-^'
1
to
DIAG VIO
TEST
MIDI
NG
XX
h
8
X—
^"-tf-RAMicVr
^
1-
ij-tg-t:
y
Miftt=7b"-L.
|i/JJUr,yt7ii$'
LSto
(1)LCD{c<:>Cc7)-^47K7'j^T-^
to
DIAG VIO
RAM
INITIAL. ?
(2)
STOREA-$-#L^to
(3)
LCD(iA'<7)-^^WAr-c.
DIAG. VI
0
RAM
INITIAL.
OK
xXMO
PREDEQxXh
ADi--|-E^PRF.
DEQ
(IC19)
LSIA^,iE;f;A'b 1
!5'^-Ry]irr
L S to
(l^':^3960Hz.+
13±
1
5ciBrny)jmilE-^
OUTPUBrrHL.R)
(cmij to
(2)LCD(C*^(7)-^^7'j^r-^
to
TEST PRE DEQ
xX
Ml
POS
DEQ(D^x'y^
POSDEQ
(IC17)
LSIAHEi'l^;
A'$
WrrL^to
(1)
^:^9601-12,
+13±1
.5dBmc/)IEijJ;iljf^
OUTPUTSjftiT
(L.R)
(c/lVljCSto
(2)
LCD{zA'CO-2^7K7-/t-S
to
DIAG.
Vl.O
TEST POS
DEQ
X
X
M
2
DSP
2 -LSI( 7
)^ X
y
^
DSP2A't^ii:i»^-miS-tr.
LSl7b''jl:.;';?/j'f
9
SlrL^to
(1)
J:^j
960
Hz,
+
13
±
1
-
5 d
Bm
(X) iEiJ^/IilE
$
OUTPUTSfU T
(t.,R)
(cmijL^to
(2)
LCD{C<A'<7)^7T*''-C-^
to
DIAG
Vl.O
TEST
DSP2
32