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EPSON Stylus Pro 7000 Revision B
Operating Principles Summary of Control Circuit Operations 76
2.4 Summary of Control Circuit Operations
This section summarizes the functions of the (C299MAIN) Main Board and the
controls used to operate the printer.
Figure 2-21. C299MAIN Board-Circuit Block Diagram
IC8
CPU/C90A14CA
CN7
Control Panel
IC13
ASIC/E05B61AA
CN2
Type-B Slot
CN3
USB I/F
CN1
Parallel I/F
IC39
SRAM/8KB
IC73,74,75,76
DRAM/8MB
IC81,82
DRAM/2MB
IC1,2
Flash ROM/1MB
-Firmware
-D/A adjustment,
setting parameters
CN20
PCMCIA CARD Socket
IC32
ASIC/uPD65802
IC20
ASIC/TE7751
IC37
DAC/M65530FP
IC33
Head-drive
voltage common
driver
Printheads (B/C)
CR
Motor
PF
Motor
Pump
Motor
Fan
Motor
x2
Printer
mechanism
Motor
drivers
B head
C head
Head-drive wave
generation
Head data & control signals
IC35
IC30
IC41
IC80
RESET IC
IC15
REGULA
TOR
IC69 BUS DRV/
LV161284
IC62 USB CTRL/
USS725
IC61
EEPROM
Reset
signal
5VDC
28VDC
42VDC
3.3V
DC
-2VDC
IC43
Fan
cutter
solenoid
Stop signal
IC9
E06A4610A
D/A adj.,
USB-ID