Ic Block Diagram - Yamaha KB-180 Service Manual

KB-180/SKB-180
AK4385ET (X6040A00) DAC (Digital to Analog Converter)
PIN
NAME I/O
NO.
1 MCLK I
2 BICK I
3 SDTI I
4 LRCK I
5 PDN I
6 CSN I
7 CCLK I
8 CDTI I

IC BLOCK DIAGRAM

SN74LV32APWR (X5647A00)
Quad 2 Input OR
DMLCD: IC207
1A
1
1B
2
1Y
3
2A
4
2B
5
2Y
6
GND
7
LA4625 ( XY209A00 )
Power Amplifier
AM: IC551
DC
2
RIPPLE
FILTER
PREDRIVER
IN1
1 +
IN
-
PREDRIVER
PRE-GND
3
BIAS
CIRCUIT
STANDBY
STBY 4
SW
PREDRIVER
IN2
6
+
IN
-
PREDRIVER
POP NOISE
PREVENTION
CIRCUIT
5 7
ON TIME POP
16
FUNCTION
Master Clock
Audio Serial Data Clock
Audio Serial Date Input
L/R Clock
Power Down mode
Chip Select
Control Data Input
Control Data Input
SN74LV138APWR (X7284A00)
3 to 8 Demultiplexer
DMLCD: IC401, 402
Vcc
14
4B
13
Select
4A
12
4Y
11
G2A
Enable
3B
10 G2B
3A
9
Output
3Y
8
GND
V
CC
14
OUTPUT PIN TO V
CC
SHORT PROTECTOR
-OUT1
13
POWER
LOAD SHORT
POWER
PWR-GND1
12
PROTECTOR GND1
11 +OUT1
POWER
OUTPUT PIN TO GND
OVER VOLTAGE/
SHORT PROTECTOR
SURGE
V
CC
THERMAL
OUTPUT PIN TO GND
SHUT DOWN
SHORT PROTECTOR
-OUT2
9
POWER
LOAD SHORT
POWER PWR-GND2
10
PROTECTOR GND2
+OUT2
8
POWER
OUTPUT PIN TO V
CC
SHORT PROTECTOR
PIN
NAME I/O
NO.
9 AOUTR- O
10 AOUTR+ O
11 AOUTL- O
12 AOUTL+ O
13 Vss -
14 VDD -
15 DZFR O
16 DZFL O
A 1 16 Vcc
A
2
B Y0 15
B YO
3
14
C C Y1 Y1
4 13
G2A Y2 Y2
Output
5 12
G2B Y3 Y3
6 11
G1 Y4
G1 Y4
7
Y7 Y7 Y5 10 Y5
Y6
8 9 Y6
DMLCD: IC501
FUNCTION
Rch Analog out(-)
Rch Analog out(+)
Lch Analog out(-)
Lch Analog out(+)
Ground
Power Supply
Rch Data Zero Input Detect
Lch Data Zero Input Detect
BA4510F-E2 (X7300A00)
Dual Operational Amplifier
DMLCD: IC502
Output 1 VCC
1 +V 8
-Input 1 Output 2
2 7
- +
+Input 1 -Input 2
3 6
+ -
VEE +Input 2
4 -V 5