Epson 7000 service manual Control Circuit Operation, Name/Code Location Function

EPSON Stylus Pro 7000 Revision B

Table 2-6. Control Circuit Operation

Name/Code	Location		Function
CPU (C90A14CA)		32 bit RISC-CPU
	IC8	•	Clock speed = 33MHz
SH7043
		• 128KB PROM (IPL) internal
ASIC (E06A4610A)	IC9	I/O port expansion
		1) Regulates print data
		•	Command handling
		• Rasterizer (image data handling)
		• Head drive regulation (DAC control)
ASIC (E05B61AA)	IC13	•	Print timing regulation
		2) Memory (DRAM/SRAM)
		3) I/F Circuit Control
		•	Parallel interface (IEEE1284)
		•	USB interface
		•	Type-B
		Motor regulation
ASIC (TE7751)	IC20	•	Pump Motor (pump/PG)
		•	Cutter solenoid
		• Fan (Paper suction) x2
		Motor regulation (PWM regulation)
ASIC (uPD65802)	IC32	•	CR Motor
		•	PF Motor
DAC (M65530FP)	IC37	3 channel 10 bit DA converter
		• head-drive voltage control
		Flash Memory (1Mbyte)
Flash Memory	IC1, IC2	•	Save firmware
(MBM29F400TC)		•	Register D/A, user defined, and
			factory default setting parameters
DRAM (EDO)	IC81, IC82	EDO RAM
	IC73~76	•	10Mbyte (onboard)
SRAM	IC39	64Kbit SRAM
(LC3564SM-10)		•	External data ring buffer type

Table 2-6. Control Circuit Operation (continued)

Name/Code	Location	Function
		Serial EEPROM
EEPROM	IC61	Head drive D/A factory adjustment
		parameters
		USB-ID factory settings
M51953BFP	IC80	Reset IC
Driver IC (L6203)	IC33, IC35	CR/PF Motor Drivers
Driver IC (LB1845)	IC30	Pump Motor Driver
Driver IC	IC41, IC43	Suction fan x2 and cutter solenoid
(MMDF205ZR2)		driver
PQ3RD13	IC15	+3.3V regulator

Operating Principles Summary of Control Circuit Operations 77