A B C D E F G H
1
2
3
4
5
6
I
J
K
L
M
N
7
8
9
10
33
KMA-1080/KMA-980
FUNCTION 2/2
* All voltages are measured with a 10M
Ω
/V DC electronic volt meter.
* Components having special characteristics are marked
Z
and must be replaced
with parts having specifications equal to those originally installed.
* Schematic diagram is subject to change without notice.
MUSIC OUT (L ch)
MUSIC OUT
MIC IN
MIC OUT (L ch)
MIC IN
MIC OUT
0
11.8
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
11.8
0
0
0
0
0
11.8
-11.5
0
0
0
11.8
-11.5
11.8
-11.5
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
11.8
0
0
0
-11.5
0
2.6
2.6
2.6
5.1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
-11.5
-11.5
W303
CB304
W302
MIC AMP
MIC MIX AMP
ECHO MIX AMP
MUSIC TONE CONTROL
MIC TONE CONTROL
FUNCTION (2)
MIC VOL
MIC 1
MIC VOL
MIC 2
MIC VOL
MIC 3
BASS
TREBLE
MUSIC TONE
BASS
TREBLE
MID
MIC TONE
MUSIC TONE
MIC TONE
MIC TONE
MUSIC BALANCE
MIC ECHO
DELAY
MIC ECHO
REPEAT
KMA-1080 only
KMA-1080
KMA-980
R308, 330
22K
0
IC300, 301, 303, 305, 307:
UPC4570G2-E1-A
Dual operational amplifier
+ –
+ –
1
2
3
4
8
7
6
5
OUT
1
OUT
2
–IN
1
+IN
1
+IN
2
-IN
2
–V
CC
+V
CC
