Mute Control - Yamaha KMA-1000 Service Manual

A B C
KMA-1000/KMA-950
FUNCTION 1/3
1
Page 45 K2 FUNCTION (1)
to FUNCTION (2)_CB304
CB2
KEY CONTROL OUT
2
MUSIC OUT
MIC OUT
BUFFER
3
DVD IN
DVD
(INPUT LEVEL)
0
0
IC1
0
0
IC1
0
0
4
IC2
IC2
ANALOG INPUT
DVD (L/R)
BGM
5
(INPUT LEVEL)
0
0
IC3
0
0
0
IC3
0
TAPE
(INPUT LEVEL)
ANALOG INPUT
6 0
0
IC4
0
TAPE IN (L/R)
0
0
IC4
0
TAPE OUT (L/R)
BGM (L/R)
7
Page 50 E4
to MAIN (2)_W552
CB22
8
IC5: NJU7313AM
Analog function switch
9
L1 2
L2 3
L3 4
L4 5
L-COM1 6
L5 7
IC1, 3, 4, 6, 7, 10, 11, 14, 18: L6 8
UPC4570G2-E1-A
L-COM2 9
Dual operational amplifier
L7 10
10
L8 11
OUT 1 +V CC
1 8
L-COM3 12
–IN 1 2 7 OUT 2
+ – + –
ST 13
+IN -IN
1 3 6 2
V DD 28
–V 4 5 +IN
CC 2
V 1
EE
44
D E F
KMA-950
MIC MIX MIC ECHO
0 0
0 0
0
0 0
0
0 0
KEY
CONTROL IN
BUFFER
INPUT SELECTOR
0
0
0
0 0
0 IC17
0
IC6
0 5.0
11.7
0
+5V
REGULATOR
0
0
0
0 0
IC6
0 0 0
0 0
0
0 0
0
LEVEL DET.
12.1
0
0 0 0
0 IC7
-11.5
IC5

MUTE CONTROL

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