Yamaha KMA-1000, Service Manual

Page: 44 / 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
44
KMA-1000/KMA-950
* 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.
KMA-950
DVD IN
KEY
CONTROL IN
KEY CONTROL OUT
MUSIC OUT
L
MIC MIX
MIC OUT
MIC ECHO
0
0
0
0
0 0
0
0
0
0
5.0
2.5
2.5
5.1
2.5
2.5
2.5
5.1
5.0
5.1
5.0
2.5
0
2.5
0
0 0
0
0
0
0
0
0
0
0
0
0
11.7
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0 0 0
0
0
5.0
12.1
0
12.1
12.1
12.1
12.1
12.1
-11.2
-11.5
0
0 0
0
-11.5
-11.5
-11.5
2.5
2.5
5.1
2.5
2.5
2.5
5.1
5.0
5.0
5.0
2.5
0
2.5
0
0 0
0
0
0
0
12.1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
-11.2
-11.2
-11.2
-11.2
0
0
0
0 0
0
0
0
0
0
0
0
0
-11.2
-11.2
-11.2
-11.2
-11.2
-11.2
-11.2
-11.2
0
0
12.1
-11.5
12.1
-11.5
-11.7
12.1
0
0
0 0
0
3.3 0 0 0 0
0 0
0 0 0 0
5.1
0
0
0
2.6
2.6
1.0
0
0
0
0
0
0
0.9
1.2
1.2
0
0
0
2.7
5.1
5.1
5.1
5.1
0
0
0
0
0
0
0
5.1
0
5.1
5.1
5.1
0
5.1
5.1
0
5.1
5.1
5.1
5.0 0 0
0
0 5.1 5.1
5.1
5.1 5.1
5.1
5.1 5.1
0
5.1 4.5 2.7
2.5
0.7
12.1 12.1
12.1
-11.2
12.1
-11.2
0
12.0
0
0
0
5.1
12.0
0
0
5.1
0
0
-11.5
0
0
-11.5
0
0 0
0
0
0
0
0
0
0
0
0
0 0 0
0 0 0
0 0
0
0 0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
5.0
5.0
12.1
-11.5
-5.0
-5.0
-5.0
CB2
CB22
CB19
CB15
W2
CB17
W1
CB3 W3
CB12
CB21
IC1
IC1
IC2
IC2
IC3
IC3
IC4
IC4
IC5
IC5
IC5
IC6
IC6
IC17
IC8
IC9
IC7 IC7 IC11
IC10
IC18
IC10
IC18
IC14
IC14
IC15
IC16
IC618
IC618
IC616
IC616
IC616
IC616
IC617
IC617
IC617
MICROPROCESSOR
EEPROM
MUTE
MUTE
MUTE
MUTE
INPUT SELECTOR
MIC VOLUME
MUSIC VOLUME
MIX AMP
LEVEL DET.
LEVEL DET.
MUTE CONTROL
BUFFER
PRE AMP
BUFFER
+5V
REGULATOR
LPF
SUBWOOFER AMP
1
Page 48 K4
to OPERATION (1)_CB237
Page 46 B2
to FUNCTION (3)_CB601
Page 49 A3
to MAIN (1)_CB401
Page 47 I2
to OPERATION (2)_CB706
Page 49 D1
to MAIN (1)_CB402
Page 50 E4
to MAIN (2)_W552
Page 45 K2
to FUNCTION (2)_CB304
Page 46 B3
to FUNCTION (3)_CB602
Page 45 D4
to FUNCTION (2)_W302
FUNCTION (1)
ANALOG INPUT
ANALOG INPUT
DVD (L/R)
BGM (L/R)
TAPE IN (L/R)
TAPE OUT (L/R)
(Writing port)
DVD
(INPUT LEVEL)
BGM
(INPUT LEVEL)
TAPE
(INPUT LEVEL)
SUB WOOFER 2
(WITH LPF)
PRE OUT (L/R)
SUB WOOFER 1
FUNCTION 1/3
Point q Pin 7 of IC15
IC1, 3, 4, 6, 7, 10, 11, 14, 18:
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
IC5: NJU7313AM
Analog function switch
2
3
4
5
6
7
8
9
10
11
12
13
28
1 14
15
16
17
18
19
20
21
22
23
24
25
26
27
LEVEL SHIFTER
LA
TCH
LEVEL SHIFTER
LA
TCH
CONTROL
R1
R2
R3
R4
R-COM1
R5
R6
R-COM2
R7
R8
R-COM3
DATA
CK
Vss
L1
L2
L3
L4
L-COM1
L5
L6
L-COM2
L7
L8
L-COM3
ST
VDD
VEE
12 LIN2
9 LOUT
8 VREF
VREF
VREF
256
256
Reset
Vref
Generator
&
Reset
pulse
Generator
2 SDATAO
20 SDATAI
19 CSN
1
SCLK
16 TE
18 ZCEN
S/P
Register
Control
Register
L
Zero Cross
Detection
IC8, 9: YAC520-EE2
Stereo digital volume controller
11 LIN1
4 DVSS
3
DVDD
13 AVSS
6 AVDD
17 ICN
+
–
R
14 RIN2
7 ROUT 15 RIN1
+
–
16
Timer RA (8-bit)
Timer RB (8-bit)
Timer RC (16-bit)
Timer RE (8-bit)
Timer RF (16-bit)
Timer RD (16-bit x 2-channel)
Timer
Internal peripheral functions
I/O port
Watchdog timer
(15-bit)
A/D converter
LIN module
(10-bit X 12-channel )
D/A converter
(8-bit
X
2-channel
)
(1-channel )
UART or
clock synchronous serial I/O
(8-bit
X
3-channel)
(8-bit X 1-channel)
System clock generator
12C BUS interface
or clock synchronous type
serial I/O with chip select function
X IN -X OUT
X CIN -X COUT
High speed On-Chip Oscillator
Low speed On-Chip Oscillator
R8C/Tiny series
microprocessor core
Port P4
3 2
Port P5
5
Port P6
8
Port P8
7
Memory
ROM
(Note 1)
RAM
(Note 2)
Note 1: ROM size depends on microprocessor type.
Note 2: RAM size depends on microprocessor type.
Multiplier
8
Port P0
8
Port P1
8
Port P2
8
Port P3
R0L R0H
R1H
R1L
R2
R3
SB
FLG
USP
ISP
INTB
PC
A0
A1
FB
IC15: R5F212A8SNFA
Microprocessor
IC16: M95010-WMN6TP
1 k-bit serial SPI bus EEPROM with high speed clock
5
2
6
1
3 Control Logic
I/O Shift Register
Y Decoder
X Decoder
1 page
High Voltage
Generator
Address Register
and Counter
Data
Register
Status
Register
Size of the
Read only
EEPROM
area
Q
D
C
W
S
HOLD
2
1 8
7
6
5
3
4
S
Q
Vss
Vcc
HOLD
C
D
W
7
IC17: NJM78M05DL1A
Voltage regulator
IN
OUT
GND
IC616, 617 : TC74HC4053AFT
Analog multiplexer/demultiplexer
INPUT STATES
INHIBIT
0
0
0
0
0
0
0
0
1
"ON" CHANNEL (S)
0X, 0Y, 0Z
1X, 0Y, 0Z
0X, 1Y, 0Z
1X, 1Y, 0Z
0X, 0Y, 1Z
1X, 0Y, 1Z
0X, 1Y, 1Z
1X, 1Y, 1Z
NONE
C
0
0
0
0
1
1
1
1
X
B
0
0
1
1
0
0
1
1
X
A
0
1
0
1
0
1
0
1
X
BINARY TO 1-OF-8
DECODER WITH INHIBIT
LEVEL
CONVERTER
VCC INHIBIT
A
B
C
GND
VEE
0X
1X
0Y
1Y
0Z
X-COM
Z-COM
Y-COM
SW
SW
SW
SW
SW
SW
11
6 16
10
9
8
7
12
13
2
5
3
1
14
15
4