Canon iPF780 Series Service Manual

Also see for image Prograf iPF785 Series: Setup guide Basic guide User guide User guide

Contents

Chapter 22-33head EEPROM in addition to the on-board EEPROM.Motor control functionThis function controls the carriage motor, feed motor, valve motor (L)/(R), shutter motor, purge motor, lift motor, roll motor and cutter motor based on the inputsignals from sensors.HDD control functionThis function controls the hard disk drive.b) Driver IC (IC4101)This IC generates a carriage motor control signal based on the control signal from the ASIC.c) Driver IC (IC4200)This IC generates a feed motor control signal based on the control signal from the ASIC.d) Driver IC (IC4300)This IC generates purge motor and cutter motor control signals based on the control signal from the ASIC.e) Driver IC (IC4401)This IC generates roll motor and valve motor (L)/(R) control signals based on the control signal from the ASIC.f) DIMMs (IC301, IC302, IC601, IC602, IC603, IC604)The DIMM comprising a 512-MB DDR-SDRAM (IC301/IC302) and 256-MB SDR-SDRAM (IC601/IC602/IC603/IC604) is connected to the 32-bit data bus tobe used as a work area.During print data reception, it is also used as an image buffer.It cannot be expanded.g) FLASH ROM (IC701)A 256-MB flash ROM is connected to the 8-bit data bus to store the printer control program.h) EEPROM (IC802)The 256-KB EEPROM stores various setting values, adjustment values, log data, counter values related to the user/servicing.i) Network control IC (IC2501)This IC controls the network interface.MEMO:After replacement of the main controller PCB, the printer must be started up in the service mode to copy over the setting and adjustment values to the new PCBproperly (the service mode will be switched to the PCB replacement mode automatically).