
MA-990
3.SCHEMATIC
DIAGRAM
Note
:
When
ordering
service
parts,
be
sure
to
refer
to
"EXPLODED
VIEWS
and
PARTS
LIST”
or
"PCB
PARTS
LIST".
49
|
EQ
main
Boarp
assy
(mwx1079)
sy
+9OV
JA402
9
MKN1017
C409
aa16
i
.
VAG
C425
33/16
+)
rst
H
R617
C407
1000P
100k
Icag2(12)
|
c6o1
AG
91k
ra
AG
MS5248AL
Tw
3
R407
100k
C613
Ww
very
T1500P_
Kes
R412
100
AGY
Rér9
tg
300K
402
(22)
AG
1/50,
¢g*
_F910
15k
91k
R409
100
R08
Yo04l
Me218AL.
10
WY
REIS
19
otk
Rao
100
ae
>
ma
7,
at
C426
1803
(2/2)
si6
cato
aaite
Reoe
csos
LL
MS218AL
aCe
408.
“
}a700P
F612
A620
1
|
‘
(000!
-gy
AG
S316
+
MG
AG AG AG
aa
eo
cess,
-9V
ist
Cel?
150
tay
0618
33/16
AG
22
47116
Le
49V.2
1S2
Cor
ean
R625
1.5k
bees
|
|
a
ae:
Fog
z
eee
1¢501
(1/2)
507
1000P
G
+
R01
C504,
Up
cas7oHA
508
33/16
WSBFAASNIS
SS}
a
§
_
Af
180s
(1/2)
|
C622
SONOS
BVecy
JA5OL
'R622T
C816!
MS218AL
TF
1000P
Beh
aSasa59s
+
aaa
29
222A
ese
MKNgOoS
1C804
(2/2)
1.1
4
700P
620
ste
OB"
2
2
8°S
MS216AL
AG
AG AG
a6.
BES.
4)
ADRS
SADRVd
TE!
R504
-9V
AG
aa]
AONE.
01
TT
0.01
380
45
ee
'
0505
3
1800P
ADMi
10/50
+5V
OSAYCC
se
ADMVed
|
FG
nG
+
reas
ADM3
—
9501
MTF3002
PO
'
=
tet
C656
CBSA
C653
ay]
P2
|
476
|
0.01
Toor
4st]
Sips
men
P4
JA5O2
0G1_DG1
DG1 Oct
Vas
LC83025E
MKN3006
F509
47k
4
yess
|
R510
47k
gi
sick
1
0.01
q
0.01
FG+
+FG
502
VCE
L605
F601
cea2
|
Rei.
0512
me
BSNS
©
2.2
MTF3002
33/16
1602
i
47150
(C592
(1/2)
me
=
—]9_LOS2464P-80
r
14_
R652,
100
#503../]
13R653.yr
100
Al
MKN3005
R516
AM
%
ya
np
[12654
yy,
100
AP
33
TF}
C514
11
F698
yyy,
100_
AS
VQVBVSSSSSSG
1800P
C528
39/16
'
513
Le
€524
100°
10/50
|
mt
Lis
1
Je
02
(2/2)
|,
B37
cste.a7100"
Too
470
i
vAs04
mnsoos
LL
|
R520
C520
hd
1
Tees
519
$,330
—-1800P
f
10/50
&
FG
o
|
AG
swsot
'
t
MSG3005,
'
MICS
_
ay,
1C503
(2/2)
1504
(1/2)
i
1
Mict.2
220
M5218AL
MB2iBAL
'
——
ie
|
40
EQHO
INPUT.SELECT
'
—t
KEY.MATRIX
LED.SELECT
’
|
“7
10K(B)
—
10K(B)—10K(B}—-10K(B)_—S0K(B}
MCS3002 MCS3002
MCS3002
MCS3003.
MCS1014
Mict.
MIC2
=
MIC3-—
«ECHO
MUSIC
1
’
R301
-:VR302.—««VA303.-««VR304-:VR305
|
1
'
VOLUME
BOARD
ASSY
(MWX1078)
|
——
D201,208,207,218
-SLR-342VG
202,203,208,
:SLR-342MC
0209-212.214-217
9204213
SLA-3420