Epson Stylus Color 1520 Service Manual page 62

P-ROM(8M)
(IC14)
Type-B
I/F
Printhead
CPU
Temperature
C90A02CB
(IC7)
+42V
Power Line
Reset IC
M51955BFP
(IC4)
+5V
Logic Line
Reset IC
RST592D
+5V
(IC1)
Lithium Battery
From IC6
From IC6
From IC5
From IC6
Figure 2-19. Control Circuit Block Diagram
P-ROM(4M) DRAM(4M)
(IC11) (IC9)
EEPROM
LE93C56
(IC2)
+5V
Timer
Counter IC
RTC-45436A
(IC3)
Black/Color Printhead
Common Driver Circuit
Nozzle Selection Signal
CR Motor Driver Circuit
SLA7043M (IC17)
PF Motor
Driver Circuit
UDN2917EB (IC16)
DRAM(4M) MROM
(IC10) (IC12)
Data Bus
Address Bus
GA
E05B34
(IC5)
GA
E05B33
(IC6)
CLK
SD I/O
Carriage
Black Printhead
Nozzle
128 Nozzles
Selection IC
Nozzle
Color Printhead
Selection IC
64 Nozzles
M
CR Motor
M
PF Motor
Operating Principles
MROM
(IC13)
+42VDC
+5VDC
PSC
CR Motor Control
Control Panel
PE, Cover Open,
REL Sensors
HP, DE Sensors
Black/Color
Control Signals
PF Motor
Control Signal
Parallel I/F
Serial I/F
2-19