Canon IR2016 Service Manual Page 156
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Chapter 6
6-4
F-6-6
6.5 Drum Unit
6.5.1 Outline of the Drum Unit
6.5.1.1 Outline
0010-4275
iR2016J / iR2016 / iR2020 / / iR2016i / iR2020i
Major components of the drum unit are as follows:
F-6-7
[1] Photosensitive drum
[2] Cleaning blade
[3] Primary charging roller
6.5.2 Charging Mechanism
6.5.2.1 Primary Charging Bias Control
0010-4276
iR2016J / iR2016 / iR2020 / / iR2016i / iR2020i
With the primary charging bias method, the drum is charged directly by the charging roller. In addition to a DC bias, an AC bias is applied to the primary charging
roller to stabilize charging. When the drum is charged, both AC and DC biases are applied. When the drum is discharged, only the AC bias is applied.
The ASIC on the DC controller PCB outputs the primary bias drive signal (/PRACFOT), primary AC bias ON/OFF signal (/PRACON), primary DC bias drive
signal (/PRDCFOT), and primary DC bias output level signal (/PRDCPWM) to apply the voltage generated by superimposing the primary AC bias over the primary
DC bias to the primary charging roller.
The primary AC bias is detected by the primary AC bias current detection circuit, and is fed back to the AC generator circuit via the comparison circuit.
The primary DC bias is detected by the primary DC bias current detection circuit, and is fed back to the DC generator circuit via the comparison circuit. Thus, this
machine controls the primary DC bias voltage. The primary DC bias voltage changes with the developing DC bias voltage according to the image density informa-
tion sent from the image processor PCB.
ASIC
CPU
Primary bias
circuit
Fixing film bias
circuit
Transfer bias circuit
Remaining toner
level detection circuit
Static eliminator
bias circuit
JP3/JP4
JP9/JP10
JP7/JP8
Developing bias
circuit
JP1/JP2
High-voltage power
supply PCB
DC controller
PCB
J214
J100
Tr3
JP5/JP6
[3]
[1]
[2]
- Service Manual 1
- Application 3
- Corrections 3
- Trademarks 3
- Copyright 3
- Symbols Used 4
- Chapter 3 Main Controller 8
- Contents 10
- Chapter 5 Laser Exposure 11
- Chapter 6 Image Formation 11
- Chapter 8 Fixing System 14
- Chapter 13 Self Diagnosis 17
- Chapter 14 Service Mode 18
- Chapter 15 Upgrading 21
- Chapter 1 Introduction 23
- 1.1 System Construction 27
- 0011-0892 28
- [1] Reader Heater *1 29
- [2] Cassette Heater *1 29
- [3] Heater PCB 29
- 0011-0914 30
- 0011-1092 30
- 1.2 Product Specifications 31
- Chapter 1 32
- 1.2.1.3 Cross-Section 33
- 1.2.2 Using the Machine 34
- 0011-1101 35
- 1.2.2.3 Control Panel 36
- 1.2.3 User Mode Items 37
- 1.2.3.1 Common Settings 37
- 1.2.3.2 Copy Settings 37
- 1.2.3.3 FAX Settings 37
- 1.2.3.4 Address Book Set 38
- 1.2.3.5 Printer Settings 38
- 1.2.3.6 Timer Settings 39
- 1.2.3.7 Report Settings 39
- 1.2.3.8 Adjust./Cleaning 39
- 1.2.3.9 System Settings 39
- *: Factory default 40
- 1.2.4 Maintenance by the User 41
- 1.2.4.2 Cleaning 41
- 1.2.5 Safety 42
- 1.2.5.2 CDRH Regulations 42
- MANUFACTURED: 43
- 0010-7304 44
- 0010-7305 44
- 1.2.6 Product Specifications 45
- 1.2.7 Function List 46
- 1.2.7.3 Types of Paper 47
- Chapter 2 Installation 51
- 2.1 Making Pre-Checks 55
- FU5-xxxx 56
- 0011-1072 58
- 2.2.4 Setting the Cassettes 59
- 0011-1523 60
- 0011-1075 60
- 0011-1077 61
- 0011-1078 61
- 0011-1079 62
- 2.4.1 Points to Note 63
- 2.4.2 Checking the Contents 63
- 2.4.3 Installation Procedure 64
- Chapter 2 68
- 0011-1083 70
- [8][7][6][5] 71
- [1] [2] [3] [4] 71
- 0011-3365 73
- [4] [5] [6] [7] 76
- 0011-3373 80
- 0011-3376 81
- 0011-3385 83
- [1] Cassette heater 1 pc 86
- 3.1 Construction 95
- 3.3 Image Processing 96
- 0010-8668 97
- 0010-8684 97
- Image processor PCB 99
- To DC controller PCB 99
- Smoothing 99
- Reader unit 100
- Data rotation 100
- Data expansion 100
- Chapter 3 101
- Rendering processing block 102
- 3.5.1.7 Removing the IP Cover 104
- 0011-3396 105
- 0010-8704 105
- 0010-8705 105
- 0010-8719 105
- 4.1 Construction 111
- 4.1.4 Reader Controller PCB 112
- 4.2 Basic Sequence 113
- Chapter 4 114
- 4.3 Various Control 115
- 4.3.1.2 Reader Motor Control 116
- 4.3.2.1 Outline 116
- 1872 pixels 117
- 7488 pixels 117
- AB-Configration 118
- Inch-Configration 118
- Horizontal scan direction 118
- Original sensor 3 119
- Original sensor 4 119
- Original sensor 2 119
- Original sensor 1 119
- 4.3.5 Dirt Sensor Control 120
- 4.3.5.1 Outline 120
- 4.3.6 Image Processing 121
- 4.3.6.1 Outline 121
- 4.3.6.2 CMOS Sensor Drive 122
- 0010-4260 123
- 0010-4295 124
- 0010-4296 124
- 0010-6089 124
- 0010-6090 124
- 0010-6091 125
- 0010-6092 125
- 0010-6093 125
- 0010-6094 125
- [2] [4][3] 126
- 0010-6095 127
- 0010-6096 127
- 0010-6097 127
- 0010-6098 127
- [2] [3] [2] 128
- 0010-6102 129
- 0010-6103 129
- 0010-6104 129
- 0010-6105 129
- Light guide 130
- Rod lens array 130
- 0010-6108 131
- 0010-6109 131
- 0010-6110 131
- 0010-6111 131
- 0010-4310 132
- 0010-6113 132
- 0010-6114 132
- 0010-4313 133
- 0010-6115 133
- 0010-4317 133
- [1][3] [2][5] 134
- [3] [1][2][4] 135
- [1][2] [3] 136
- 5.1 Construction 141
- 0010-4801 142
- 5.2 Various Controls 143
- 0010-7721 144
- 0011-2156 144
- 0010-7722 144
- 0010-7723 144
- 5.2.4.1 Laser Shutter Control 145
- [5] [2] [4] 147
- [3][1][3] 147
- 6.1 Construction 153
- 6.2 Image Formation Process 153
- 6.3 Basic Sequence 154
- 6.4.1 Outline 155
- 6.5 Drum Unit 156
- 6.6 Developing Unit 157
- 6.7 Toner Container 158
- 6.8 Transfer Unit 158
- 6.8.3 Separation Mechanism 159
- 6.9.1 Outline 160
- 0010-6186 162
- 0011-2541 162
- 0010-6187 162
- 7.1 Construction 167
- 7.1.10 Sensor Layout Drawing 171
- 7.2 Detecting Jams 172
- 7.3 Cassette Pick-Up Unit 172
- 0011-0268 173
- 0011-0289 174
- 7.4 Manual Feed Pickup Unit 175
- 0011-0655 176
- 0011-0652 176
- 0011-0654 176
- 0011-0660 176
- 0011-2937 176
- 0011-0664 177
- 0011-2938 177
- 0011-0661 177
- 0011-2939 177
- [4][3][2][1] 178
- [3] [2] [1] 180
- 0011-0656 181
- 0011-3156 181
- 0011-2972 181
- 0011-2973 181
- 0011-0670 181
- Chapter 7 182
- 8.1 Construction 187
- 8.1.2 Major Components 188
- [1] FILM_SENS 189
- DC Controller PCB 190
- 8.3 Protective Functions 191
- 0010-9892 193
- 0010-9894 193
- 0010-9895 193
- 0010-9909 193
- 0010-9936 195
- 0010-9937 195
- 0010-9938 195
- 0010-9939 195
- 0010-9942 198
- 0010-9923 199
- 0010-9924 199
- 0010-9925 199
- 0010-9926 199
- 0010-9928 201
- 0010-9950 203
- 0010-9951 203
- 0010-9952 203
- 0010-9954 203
- 8.4.5 Fixing Film Sensor 205
- 0010-9919 206
- 0010-9920 206
- 0010-9921 206
- 9.1 Control Panel 213
- 9.2 Fans 213
- 9.3 Power Supply System 214
- 0011-0050 215
- 0011-0051 215
- 0011-0052 215
- 0011-0053 215
- 0011-1524 215
- [1][1][3] 216
- 0011-0607 217
- 0011-0608 217
- 0011-0610 217
- 0011-0611 217
- 9.4.2.6 Removing the SDRAM 219
- 9.4.2.7 Removing the SDRAM 219
- 9.4.2.9 Removing the IP Cover 219
- 0011-0619 220
- 0011-0630 220
- 0011-0631 221
- 0010-9965 222
- 0010-9967 222
- 0010-9968 222
- 0010-9969 222
- 0010-9978 222
- [1] [2][2] 223
- [2][2] [1] 223
- [2][1][2] 224
- 9.4.7.5 Removing the HVT PCB 225
- 0011-0418 226
- 0011-0048 226
- 0011-0049 226
- 0011-0625 228
- 0011-0626 229
- [2] [1] [3] 230
- 10.2 Durables and Consumables 237
- 10.3.1 Scheduled Servicing 238
- 11.1 Scanning System 243
- 11.2 Image Formation System 243
- 11.3 Electrical Components 243
- 12.1 Making lnitial Checks 249
- 0011-2837 250
- 0011-2720 250
- 0011-2721 250
- 12.2.3 Fan 251
- 12.2.3.1 List of Fans 251
- 12.2.4 Sensor 252
- 12.2.4.1 List of Sensors 252
- Chapter 12 253
- <Printer Unit> 253
- 12.2.5 Switch 254
- 12.2.5.1 List of Switches 254
- <Printer unit> 255
- 13.1 Error Code Table 261
- 13.2 Error Code Details 261
- Chapter 13 262
- 13.3 Jam Code 263
- 13.4 Finisher Error Codes 264
- 13.5 FAX Error Codes 268
- 14.1 Outline 277
- 14.2 Default settings 278
- Chapter 14 279
- 00000000 283
- 0011-1747 285
- 0011-1748 285
- 0011-1749 285
- 0011-1750 285
- 0011-1773 289
- 0011-1774 289
- 0011-1775 289
- 0011-1777 289
- 0011-1788 289
- 14.6.1 Setting of Bit Switch 293
- 14.7.1.2 SSSW-SW14 297
- 14.7.1.3 SSSW-SW15 298
- 14.7.2.1 List of Functions 298
- 47: - 50: Not used 299
- 0011-1913 300
- 0011-1918 300
- 0011-1968 300
- 0011-1934 300
- 0011-1687 300
- 14.10.1 Counters 301
- 14.10.2 Clearing Counters 301
- 14.11 Service Report (REPORT) 302
- 14.11.4 Counter List 304
- 14.11.5 Error Log List 304
- 14.11.6 Spec List 306
- 14.11.7 Service Label 307
- 14.12 Download (DOWNLOAD) 308
- 14.15 Test Mode (TEST) 309
- 0011-0886 311
- 0011-0887 311
- 0011-0888 312
- 0011-0889 312
- 0011-0890 314
- 0011-0891 318
- 15.1 Outline 323
- 15.2 Making Preparations 323
- 15.2.2 Connection 325
- 15.3.1 Downloading System 326
- Chapter 15 328
- "START" button 328
- 15.3.2 Downloading BOOT 331
- 15.3.3 Other Upgrade Methods 331
- Sep 14 2005 333
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