Epson Stylus Pro 9000 Service Manual - Page 37
Control Circuit, C277MAIN Board-Circuit Block Diagram, Table 2-7. - driver mac
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EPSON Stylus Pro 9000 2.2.6 Control Circuit This section summarizes the functions of the (C277MAIN) Main Board. IC8 CPU/C90A08CA (SH7043) CN7 Control Panel IC13 ASIC/E05B61AA IC39 SRAM/8KB CN2 Type-B Slot CN3 Mac Serial I/F CN1 Parallel I/F IC32 ASIC/uPD65802 IC20 ASIC/TE7751 Motor drivers IC33 IC35 IC30 IC31 IC18/19 DRAM/2MB CN19 RAM-SIMM/16MB Fixed IC1/2 Flash mem./1MB -Firmware -Setting parameters CN20 PC Card connector Head-drive wave generation IC37 DAC/M65530FP B head C head Head-drive voltage common driver Head data & control signals Printer CR PF mechanism Motor Motor PG Motor Pump Motor Printheads (B/C) Figure 2-16. C277MAIN Board-Circuit Block Diagram Technical Overview Table 2-7. C277MAIN Board Main Components Name/Code Location Function CPU (C90A08CA) SH7043 ASIC (E05B61AA) ASIC (TE7751) ASIC (uPD65802) DAC (M65530FP) Flash Memory (MBM29F400TC) DRAM (EDO) SRAM (LC3564SM10) IC8 IC13 IC20 IC32 IC37 IC1/2 IC18/19 IC39 32 bit RISC-CPU Clock speed = 33MHz 128KB PROM internal Regulates print data Command handling Rasterizer (image data handling) Head drive regulation (DAC) Print timing regulation Memory (DRAM/SRAM) I/F Circuit Control Parallel interface (IEEE1284) Macintosh Serial interface Type-B Regulates Motor Pump Motor PG Motor (PG setting) Fan (PS, Paper Suction) Regulates motor (PWM regulation) CR Motor PF Motor 3 channel 10 bit DA converter head-drive voltage control Flash Memory (1Mbyte) Save firmware Register setting parameters EDO RAM 2Mbyte 16Mbtye (CN19 mounted SIMM) 64Kbit SRAM External data ring buffer type Driver IC (L6203) IC33/35 CR/PF Motor Driver Driver IC (LB1845) IC30/31 PG/Pump Motor Driver 37