Canon LBP-2410 Technical Information Seite 76
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©
2003 CANON INC. 2000 2000 2000 2000 CANON LBP-2410 REV.0 FEB. 2003
CHAPTER 2 OPERATION AND TIMING
2-34
3.2.5 Image mask control
This control is utilized to avoid laser beam emission on the non-image areas during peri-
ods other than the unblanking period.
The DC controller let the laser driver IC go into LD force off mode to turn off the laser
diodes (LD1, LD2) forcefully while the laser beam scans on non-image areas during periods
other than the unblanking period. This status is called an image mask status, which the laser
diodes (LD1, LD2) do not emit light even though the VIDEO (VDI1, /VDI1, VDI2, /VDI2)
signals are input during this period. Control timing for the image masking is determined
based on paper size information sent from the interface controller.
If the length of paper measured with the registration sensor (PS711) is longer than paper
size information, the DC controller puts the image masking forcefully to avoid soiling the
secondary transfer roller.
F02-302-02
1. The shaded areas indicate areas in which an image can be written by
the laser beams.
2. Times T1 to T3 vary according to a paper size.
3. When the multi-purpose tray is selected as a pick-up source, the paper
width cannot be determined if a paper size specification command is
not sent from the interface controller. In this case, values of T1 to T3
are set to be that of universal size.
/BD
LEFT/RIGHT
MARGIN
MASKING signal
T2
2 mm
2 mm
2 mm
T1
TOP/BOTTOM
MARGIN MASKING
signal
/TOP
2mm
T3
20ms
- LBP-2410 1
- INTRODUCTION 3
- Contents 4
- CONTENTS 5
- CHAPTER 1 9
- PRODUCT INFORMATION 9
- 1 FEATURES 11
- 2 SPECIFICATIONS 12
- 2.1.2 Interface controller 13
- 2.2 Options 14
- 3 SAFETY INFORMATION 15
- 4 PARTS OF THE PRINTER 16
- CHAPTER 1 PRODUCT INFORMATION 17
- 4.2 Cross Sectional View 18
- F01-402-02 19
- [1] Pick-up roller 19
- [2] Feed roller 19
- [3] Separation pad 19
- 5 INSTALLATION 20
- 5.2.3 Space 21
- 5.3.1 Printer 22
- 5.3.2 EP-87 Drum Cartridge 22
- 5.3.3 EP-87 Toner cartridge 24
- Color seal 26
- 5.3.4 Paper feeder 27
- Waste toner 28
- Electr ical 29
- CUSTOMER 31
- 7 USING THE MACHINE 34
- 7.3.1 Installing CAPT 36
- 7.3.2 Operating Environment 36
- 7.3.3 Installation 37
- 7.4 Microsoft Windows 98/Me 38
- 7.4.2 Operating Environment 39
- 7.4.3 Installing CAPT 39
- CHAPTER 2 41
- OPERATION AND TIMING 41
- 1 BASIC OPERATION 43
- 1.2 Basic Operation Sequence 44
- 1.3 Power-on sequence 45
- 2 ENGINE CONTROL SYSTEM 46
- 2.2.2 Operations 48
- 2.2.3 Motor/fan control 49
- F02-202-04 53
- 2.3.1 Outline 55
- 2.4 Power Supply Unit 58
- 2.4.2 Fixing control circuit 59
- AC power source 62
- Heater ON 62
- F02-204-04 65
- 2.5 Video Interface Control 66
- 2.5.2 Video interface signals 67
- 2.6 Interface Controller PCB 68
- F02-206-01 69
- F02-206-02 70
- 3 LASER/SCANNER SYSTEM 71
- 3.2 Laser Control 73
- 3.2.2 Laser emission control 74
- 3.2.5 Image mask control 76
- 3.3 Scanner Motor Control 77
- 4 IMAGE FORMATION SYSTEM 79
- 4.2 Image Formation Process 80
- F02-402-02 81
- Surface potential (V) 82
- Laser beam 83
- Unexposed 83
- 4.2.2 Developing block 84
- Potential (V) 85
- 4.2.3 Transfer block 86
- Secondary 87
- 4.2.4 Fixing block 89
- 4.2.5 ITB cleaning block 90
- 4.3.1 Outline 94
- F02-403-02 96
- 4.4.1 Outline 100
- 4.4.2 Memory tag 101
- COPYRIGHT 102
- TONER LEVEL DETECTION signal 105
- LED DRIVE signal 105
- 4.5.1 Outline 106
- F02-405-02 108
- Drum cartridge 109
- Memory tag contact 109
- Memory tag 109
- DC controller 109
- F02-405-04 111
- F02-405-06 114
- 4.6.1 Outline 115
- F02-406-02 117
- F02-406-03 119
- Density sensor 120
- Detection 120
- 5 PICK-UP/FEED SYSTEM 122
- 5.2 Pick-up/Feed Unit 124
- Pick-up/feed 124
- Fixing/delivery unit 124
- 5.2.4 Feed speed control 127
- TH3 temperature 128
- 5.4 Jam Detection 129
- 5.4.6 Door open jam 130
- 5.4.7 Residual paper jam 130
- 6 PAPER FEEDER 131
- 6.2.1 250-sheet paper feeder 132
- CHAPTER 3 135
- THE MECHANICAL SYSTEM 135
- 1 PREFACE 137
- Engaging sensor 138
- Sensor flag 138
- 33T gear 138
- F03-102-02 139
- 2 EXTERNALS 142
- 2.1.1 Left cover 143
- 2.1.2 Top cover unit 143
- 2.1.3 Right cover unit 146
- 2.1.4 Front cover unit 146
- 2.1.5 Rear cover 147
- 2.1.6 Face-up cover 147
- 2.1.7 I/O cover 148
- 2.1.8 Control Panel 149
- 3 MAIN UNITS 150
- 3.2 Laser/Scanner Unit 151
- 3.3 Main Drive Unit 152
- 3.4 Registration Shutter Unit 156
- 3.5 Registration Roller Unit 157
- 3.6 Rotary Drive Unit 158
- 3.7 Developing Rotary Unit 160
- [1] [1][2] 164
- 4 MAIN PARTS 165
- 4.5 Separation Pad 168
- 4.6 Registration Roller 168
- 4.8 Secondary Transfer Roller 169
- 4.10 Fixing Film Unit 170
- 4.11 Pressure Roller 173
- 5 SENSORS/SWITCHES 174
- 5.6 Roller Engaging Sensor 177
- 5.7 Power Switch 177
- 6 SOLENOIDS/CLUTCHES 178
- 6.4 Roller Engaging Clutch 180
- 6.5 Registration Clutch 180
- 7 MOTORS/FAN 181
- 7.2 Engaging Motor 182
- 7.3 Developing Rotary Motor 182
- 7.4 Toner Cartridge Motor 182
- 7.5 Fixing Motor 183
- 7.6 Main Motor 183
- 7.7 Cooling Fan 184
- 8.1 Locations 185
- 8.2 Waste Toner Detection PCB 186
- 8.4 Density Detection PCB 187
- 8.9 Power Supply Unit 190
- 8.10 DC Controller PCB 193
- 8.11 Interface Controller PCB 193
- 9 250-SHEET PAPER FEEDER 195
- 9.1.2 Pick-up roller 196
- 9.1.3 Separation pad 196
- 9.2 Sensors/Solenoid/PCB 197
- 9.2.2 Pick-up solenoid 198
- 9.2.3 Pick-up sensor 199
- 9.2.4 Feed sensor 199
- 9.2.5 Paper feeder driver PCB 200
- CHAPTER 4 203
- TROUBLESHOOTING 203
- F04-101-01 206
- 1.2 Initial Check 207
- 1.2.5 Fixing unit sets 208
- 1.2.6 External cover sets 208
- 1.2.7 Condensation 208
- 1.3 Test Print 209
- 75mm pitch 210
- CHAPTER 4 TROUBLESHOOTING 211
- T04-201-02 220
- 3 PAPER JAM TROUBLESHOOTING 221
- 5 MALFUNCTION TROUBLESHOOTING 228
- 7 MEASUREMENT AND ADJUSTMENT 238
- Function 240
- Test print switch 240
- 8 MAINTENANCE AND SERVICING 241
- 8.4.6 Feed belt 242
- 8.5 Standard Tools 243
- 8.6 Special Tools 244
- 8.7 Solvent/Oil List 244
- 9 SERVICE MODE 245
- 9.2 Starting Service Mode 246
- 10 LOCATION OF CONNECTORS 247
- 10.2 250 paper feeder 248
- APPENDIX 249
- 1 GENERAL TIMING CHART 251
- (Unit: seconds) 252
- 2 GENERAL CIRCUIT DIAGRAM 257
- Blank page 258
- 3 LIST OF SIGNALS 259
- 4.1 Outline 266
- This publication is 270
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