Epson Stylus PRO 7500 Service Manual page 73

EPSON Stylus Pro 7500
Table 2-4. Control Circuit Operation
Name/Code Location
CPU (C90A14CA)
IC8
SH7043
ASIC (E06A4610A)
IC9
ASIC (E05B61AA)
IC13
ASIC (TE7751) IC20
ASIC (uPD65802)
IC32
DAC (M65530FP) IC37
Flash Memory
IC1, IC2
(MBM29F400TC)
IC73~76
DRAM (EDO)
IC81, IC82
SRAM (LC3564SM-
IC39
10)
Operating Principles
Function
32 bit RISC-CPU
• Clock speed = 32.768MHz
• 128KB PROM (IPL) internal
I/O port expansion
1) Regulates print data
• Command handling
• Rasterizer (image data handling)
• Head drive regulation (DAC control)
• Print timing regulation
2) Memory (DRAM/SRAM)
3) I/F Circuit Control
• Parallel interface (IEEE1284)
• USB interface
• Type-B
Motor regulation
• Pump Motor (pump/PG)
• Cutter solenoid
• Fan (Paper suction) x2
Motor regulation (PWM regulation)
• CR Motor
• PF Motor
3 channel 10 bit DA converter
• head-drive voltage control
Flash Memory (1Mbyte)
• Save firmware
• Register D/A, user defined, and factory
default setting parameters
EDO RAM
• 10Mbyte (onboard)
64Kbit SRAM
• External data ring buffer type
Control Circuit (C299MAIN Board) Outline
Table 2-4. Control Circuit Operation (continued)
Name/Code Location
EEPROM IC61
M51953BFP IC80
Driver IC (L6203)
IC33, IC35
Driver IC (LB1845)
IC30
Driver IC
IC41, IC43
(MMDF205ZR2)
PQ3RD13
IC15
Revision A
Function
Serial EEPROM
Head drive D/A factory adjustment
parameters
USB-ID factory settings
Reset IC
CR/PF Motor Drivers
Pump Motor Driver
Suction fan x2 and cutter solenoid driver
+3.3V regulator
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