Canon MultiPASS C755 Service Manual - Page 138

d Printer control d-1 MPU&Printer controller IC 101, d-2 ROM IC 202, d-4 EEPROM IC 301 - printer driver

Get Canon MultiPASS C755 PDF manuals and user guides View all Canon MultiPASS C755 manuals
Add to My Manuals
Save this manual to your list of manuals

Page 138 highlights

MultiPASS C755 Chapter 3: Maintenance & Service d) Printer control section d-1) MPU&Printer controller (IC 101) The main functions of the printer controller are as follows: • Bi-centronics interface • EEP-ROM control • DRAM control • Buffer control • Print head control Also, the printer controller include MPU function are as follows: • 16 bit CPU • 21 bit address bus • 16 bit data bus • Carriage motor/Paper feed motor control The stepping motor controller outputs the carriage motor's single- and two-phase exciter drive signal, and paper feed motor's two-phase drive signal. The stepping motor controller switches the carriage motor with the 5-step peak current value for optimum driving. The stepping motor controller outputs the switching control signal to the carriage motor driver. • Detection of BJ head temperature • Detection of printer's internal temperature. • Detection of Home position sensor, Paper edge sensor and Pickup roller sensor. • Cartridge detection. d-2) ROM (IC 202) The 8 Mbit control/CG ROM contains the program and bitmap font data for printer control. d-3) DRAM (IC 102) 16 Mbit DRAM is used as the print buffer, and working area. d-4) EEPROM (IC 301) Controlled by the printer controller, the 2 Kbit EEPROM (Electrically Erasable and Programmable ROM) stores various printer emulation settings, and the waste ink amount discharged to the waste ink absorber. 3-87

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
  • 90
  • 91
  • 92
  • 93
  • 94
  • 95
  • 96
  • 97
  • 98
  • 99
  • 100
  • 101
  • 102
  • 103
  • 104
  • 105
  • 106
  • 107
  • 108
  • 109
  • 110
  • 111
  • 112
  • 113
  • 114
  • 115
  • 116
  • 117
  • 118
  • 119
  • 120
  • 121
  • 122
  • 123
  • 124
  • 125
  • 126
  • 127
  • 128
  • 129
  • 130
  • 131
  • 132
  • 133
  • 134
  • 135
  • 136
  • 137
  • 138
  • 139
  • 140
  • 141
  • 142
  • 143
3-87
MultiPASS C755
Chapter 3: Maintenance & Service
d) Printer control section
d-1) MPU&Printer controller (IC 101)
The main functions of the printer controller are as follows:
•
Bi-centronics interface
•
EEP-ROM control
•
DRAM control
•
Buffer control
•
Print head control
Also, the printer controller include MPU function are as follows:
•
16 bit CPU
•
21 bit address bus
•
16 bit data bus
•
Carriage motor/Paper feed motor control
The stepping motor controller outputs the carriage motor’s single- and two-phase exciter drive signal,
and paper feed motor’s two-phase drive signal.
The stepping motor controller switches the carriage motor with the 5-step peak current value for
optimum driving.
The stepping motor controller outputs the switching control signal to the carriage
motor driver.
•
Detection of
BJ head temperature
•
Detection of printer’s internal temperature.
•
Detection of
Home position sensor, Paper edge sensor and Pickup roller sensor.
•
Cartridge detection.
d-2) ROM (IC 202)
The 8 Mbit control/CG ROM contains the program and bitmap font data for printer control.
d-3) DRAM (IC 102)
16 Mbit DRAM is used as the print buffer, and working area.
d-4) EEPROM (IC 301)
Controlled by the printer controller, the 2 Kbit EEPROM (Electrically Erasable and Programmable
ROM) stores various printer emulation settings, and the waste ink amount discharged to the waste ink
absorber.