A B C D E F G H
1
2
3
4
5
6
I
J
K
L
M
N
O
7
8
9
10
48
KMA-1000/KMA-950
OPERATION 2/2
MIC IN
0
0
0
0
0.6
0
0
2.1
0
0
0
2.1
2.1
1.9
5.1
1.6
1.6
1.9
0
1.6
1.6
1.9
5.1
5.1
0
~
0
0
0
0
5.1
5.1
0
0
5.1
~
5.1
0
0
2.8
2.8
2.8
2.7
2.8
2.8
0
0
0
0
0
5.1
5.1
1.6
1.6
1.9
0
0
0
5.1
5.1
0
0
0
~
2.1
2.1
~
5.1
2.1
2.1
2.1
2.1
2.1
0
0
0
0
0
0
12.1
-11.5
0
0
5.2
0
0
0
0
0
0
0.7
0
0
0
0
0
0.6
0
5.1
0
5.1
CB237
CB562
W702
CB901
IC236
IC235
IC238
IC239
IC237
IC237
IC237
IC237
IC237
IC237
IC241
IC241
IC240
VIDEO SELECTOR
VIDEO AMP
VIDEO CONTROL
MIC AMP
OPERATION (4)
OPERATION (1)
OPERATION (6)
OPERATION (3)
Page 45
A3
to FUNCTION (2)_W303
Page 47
G4
to OPERATION (2)_CB707
Page 49
K4
to MAIN (1)_CB409
Page 44
L7
to FUNCTION (1)_CB21
5
1
2
6
11
10
3
4
9
8
13
12
MIC 1
MIC 2
BALANCED MIC INPUT
1
2
REMOTE
POWER
ON/OFF
ECHO MODE
VIDEO
DVD INPUT
OUTPUT 1
OUTPUT 2
BGM INPUT
* 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.
IC237:
TC74HCU04AFEL
Hex inverters
VCC
6A
5A
4A
6Y
5Y
4Y
GND
3Y
3A
2A
1A
2Y
1Y
1
2
3
4
5
6
7
14
13
12
11
10
9
8
7
1
2
3
4
5
6
8
14
13
12
11
10
9
LOGIC
IN1
GND
CTLA
CTLB
CTLC
IN2
GND
V
OUT
GND
IN5
VCC
IN4
GND
IN3
IC235, 236
: BA7649AF-E2
Video signal switcher for VTR, TV
6 dB
Amp
75-ohms
Driver
CLAMP
2.0k
2.2k
750
5
6
8
6 dB
Amp
75-ohms
Driver
CLAMP
2.0k
2.2k
750
4
3
1
7
2
VIN2
VOUT2
V+
GND
VSAG2
VOUT1
VSAG1
VIN1
IC238, 239
: NJM2267M
Dual video 6 dB amplifier with 75-ohms driver
IC241:
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
QH’
9
10
SCLR
15
QA
14
SER
R
D
Q
SCK
11
SCK
R
D
Q
SCK
R
D
Q
SCK
R
D
Q
SCK
R
D
Q
SCK
R
D
Q
SCK
R
D
Q
SCK
R
D
Q
SCK
D
Q
RCK
12
RCK
13
G
16
VCC
8
GND
1
QB
2
QC
3
QD
4
QE
5
QF
6
QG
7
QH
D
Q
RCK
D
Q
RCK
D
Q
RCK
D
Q
RCK
D
Q
RCK
D
Q
RCK
D
Q
RCK
RCK
X
X
X
x
SCK
X
X
x
X
SCLR
X
L
H
H
G
1
X
X
X
FUNCTION
QA thru QH = Tri-State
Shift Register cleared
QH’ = 0
Shift Register clocked
QN = Qn-1, Q0 = SER
Contents of Shift
Register transferred
to output latches
IC240:
TC74HC595AF
8-bit Shift register/latch (3-state)
KMA-950