Epson Stylus Color 1520

Operating Principles
Rev. A
2-1
9
CLK
SD I/O
Data Bus
DRAM(4M)
(IC10)
Address Bus
Timer
Counter IC
RTC-45436A
(IC3)
CPU
C90A02CB
(IC7)
GA
E05B33
(IC6)
MROM
(IC13)
P-ROM(8M)
(IC14)
P-ROM(4M)
(IC11)
MROM
(IC12)
M
From IC5
M
+42VDC
+5VDC
Type-B
I/F
+5V
DRAM(4M)
(IC9)
GA
E05B34
(IC5)
PSC
Power Line
Reset IC
M51955BFP
(IC4)
Logic Line
Reset IC
RST592D
(IC1)
EEPROM
LE93C56
(IC2)
From IC6
From IC6
+5V
+42V
+5V
PE, Cover Open,
REL Sensors
HP, DE Sensors
Black/Color
Control Signals
PF Motor
Control Signal
Parallel I/F
Serial I/F
Control Panel
CR Motor Control
Head
Temperature
Lithium Battery
From IC6
Black/Color Head
Common Driver Circuit
Nozzle Selection Signal
PF Motor
Driver Circuit
UDN2917EB (IC16)
Carriage
CR Motor Driver Circuit
SLA7043M (IC17)
CR Motor
PF Motor
Nozzle
Selection IC
Black Head
128 Nozzles
Color Head
64 Nozzles
Nozzle
Selection IC
Figure 2-19. Control Circuit Block Diagram