Yamaha KMA-1000, Service Manual

Page: 46 / 68

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
46
KMA-1000/KMA-950
FUNCTION 3/3
KEY CONTROL IN
KEY CONTROL OUT
MIC MIX
MIC ECHO
0
0
0
0
0
0
12.1
0
2.5
2.6
2.6
2.6 2.6
2.5
0
0
0
0
0
12.1 12.1
-11.5
-11.5
-11.5
3.9
2.6
2.6 2.6 2.5 2.5
0 0
0
2.6
12.1
-11.5
-11.5
-11.5
12.1
12.1
5.1
2.5 2.5
2.5
2.6
0
2.6
2.6
0
2.6
2.6
5.1
5.1
0
0
2.5
2.5
2.5
2.5
5.1
5.1
0 0
2.6 2.5 5.1 5.1
2.7
5.1
5.1
2.5
3.9
3.9
3.9
3.9
3.7
3.8
2.6
2.7
2.6
2.6
2.6
2.6
3.9
3.9
3.9
3.9
3.7
3.5
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.5
2.7
3.9
3.9
0
4.3
5.1
5.1
0 0
2.6
2.7
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.5
2.7
3.9
3.9
0
4.3
5.1
5.1
0 0
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
0
2.6
2.6
2.7
2.6
2.6
2.6
0
0
0
0
0
0
0
0
0
0
0
0
2.6
2.6
2.6
5.1
3.9
3.7
3.9
3.9
3.9
3.9
0
5.1
5.1
0
0
0
0
0
0
2.6
5.1
0 2.6
2.2 2.1 4.3 2.7 3.8 3.5
KARAOKE
PROCESSOR
SRAM
DAC
2
CB601
CB602
IC614
IC614
IC612
IC612
IC615
IC615
IC602
IC606
IC607
IC608
IC608
IC605
IC610
IC610
IC611
IC611
Page 44 L5
to FUNCTION (1)_CB12
Page 44 G2
to FUNCTION (1)_CB19
FUNCTION (3)
* 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.
IC608, 610–612, 614, 615:
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
Point
w
Pin 57 of IC602
Power Supply
Enhanced
Multilevel
Delta Sigma
Modulator
V OUT L
4 /8
Oversampling
Digital
Filter
With
Function
Control
Audio
Serial
Port
BCK
LRCK
DATA
Serial
Control
Port
Zero Detect
(TEST)
SCK
System
Clock
Manager
MC (DEMP1)
MS (DEMP0)
Output Amp
and
Low Pass Filter
MD (MUTE)
DAC
V COM
System Clock
AGND
V
CC
ZEROR/ZEROA
(1)
(ZEROA)
ZEROL/NA
(1)
Output Amp
and
Low Pass Filter
DAC
V OUT R
(FMT)
IC605 : PCM1780DBQR
Audio digital-to-analog converter
A3
A2
A5
A6
A7
A12
A14
A16
A15
ADDRESS
INPUT
B
UFFER
ADDRESS
INPUT
B
UFFER
BLOCK
DECODER
COLUMN
DECODER
CLOCK
GENERATOR
131072 WORDS
X 8 BITS
(512 ROWS
X 128 COLUMNS
X 16 BLOCKS)
ADDRESS INPUT B
UFFER
SENSE AMP
OUTPUT B
UFFER
D
A
T
A
INPUT
B
UFFER
R
O
W DECODER
7
6
5
4
3
2
31
9
10 DQ1
DQ2
DQ3
DQ4
DQ5
DQ6
DQ7
DQ8
13
14
15
17
18
19
20
21
W
A13
A8
A9
A11
28
27
26
25
A4
A1
A0
A10
8
11
12
12
29
OE 24
VCC 32
GND(OV) 16
S1 22
S2 30
IC606, 607 : M5M51008DFP-55H
131072 X 8 bit CMOS static RAM
BCI.SDSY.DI
RD
LD
RA
LA
MIC
RD
LD
DA
LA
/IC
/CS
/SCK
CDI
BCO
L/R
DO
AOL
AOR
/ANLS
CVA
AIL
CNL
AIR
CHR
MIC
CHM
CUB
A/D
D/A
DSP
MPX
Microprocessor
interface
A/D SEL
DMPX
Suspected SRAM
interface
Clock
oscillate
IC602: YSS205B-F
Karaoke processor
KMA-950