Block Diagram - Yamaha EZ-EG Service Manual

IC BLOCK DIAGRAM
74HCU04DT (XZ110A00)
Hex Inverter
DM: IC607
1A 1 14
2
13
1Y
3 12
2A
4
2Y 11
5
10
3A
6
9
3Y
7
Vss 8
TC74HC4053AFT (XV944A00)
Multiplexer/Demultiplexer
DM: IC701
Switches IN/OUT
Y1
1 Y1 V 16
DD
– do. – Y0
2 Y0 Y 15
– do. – Z1
3 Z1 X 14
Commons OUT/IN
4 Z X1 13
Z
Swiches IN/OUT
5 Z0 X0 12
Z0
Control Inhibit
6 INH A 11
– DC Voltage Supply
7 VEE B 10
– do. –
8 V C 9
SS
M5291FP-600C (XR858A00)
DC-DC Converter
DM: IC504
Switch-Collector
1
Q
Switch-Emitter 2
Capacitor 3
1.17V
reference
voltage
Ground
4
HD74LVC08FP (XU720A00)
Quad 2 Input AND
DM: IC306
1A
VDD
1B
6A
1Y
6Y
2A
5A
2B
5Y
2Y
4A
VSS
4Y
µPC4572G2-T1 (XF634A00)
NJM2904V(TE1) (XR532A00)
Dual Operational Amplifier
DM: IC502, 601-606
+DC Voltage Supply Output A
Inverting
Commons OUT/IN Y
Input A
Non-Inverting
– do. – X
Input A
Ground
Swiches IN/OUT X1
– do. – X0
Control Input A
– do. – B
– do. – C
Driver
8
S
R
7 Peak current detect
Generator
Comparator
6 Power supply
+
Input
5
1 14 VDD
2 13 4B
4A
3 12
4Y
4 11
3B
5 10
3A
6 9
7 8 3Y
+DC Voltage
+V
1 8
Supply
Output B
2 7
- +
Inverting
3 6
+ -
Input B
Non-Inverting
-V
4 5
Input B
MM74HC14SJX (XW104A00)
Hex Inverter
DM: IC702
1A VDD
1 1
1Y 6A
2 2
2A 6Y
3 3
2Y 4 4 5A
3A 5 5 5Y
3Y 4A
6 6
GND 4Y
7 7
µPD6379AGR (XR998A00)
D/A Converter
DM: IC501
Rch analog
Power supply
1 R V 8
OUT DD
Output
Voltage
Shift clock
REF C
2 7
LK
reference
Ground Serial dat input
3 GND SI 6
Lch analog
L/R clock
4 L LR 5
OUT CK
output
EZ-EG
11