Utax CD 1015 Service Manual Page 251
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- Table of contents
- BOOKMARKS
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2AV/X
2-1-11
2-1
(1) Formation of magnetic brush
The developing roller consists of a magnet roller with five poles and a sleeve roller. Rotation of the sleeve roller around
the magnet roller entrains developer, which in turn forms a magnetic brush at pole N1 on the magnet roller. The height of
the magnetic brush is regulated by the doctor blade; the developing result is affected by the position of the poles on the
magnet roller and the position of the doctor blade.
A developing bias voltage generated by the high-voltage transformer PCB (HVTPCB) is applied to the developing roller
to provide image contrast.
A
A: Distance between the doctor blade and developing roller: 0.6±0.05 mm
Figure 2-1-14 Forming a magnetic brush
CN4-1
24 V DC
MPCB
CN1-9
DB
HVTPCB
CN4-4
DB REM
CN1-6
CN4-7
CN13-2
CN13-3
CN11-1,2
DB CONT
TNS SIG
TNS CONT
CN1-4
CN13-7
WTDSW
TFM
Figure 2-1-15 Developing section block diagram
1 Developing unit housing
2 Developing roller
3 Toner sensor (TNS)
4 Doctor blade
5 Right developing spiral
6 Left developing spiral
7 Developing paddle
- UTAX CD 1015 / 1020 1
- Double-pole/neutral fusing 2
- 1. Installation Precautions 4
- 3. Miscellaneous 6
- CONTENTS 7
- 1-6 Assembly and Disassembly 9
- 2-1 Mechanical construction 10
- 2-2 Electrical Parts Layout 10
- 2-3 Operation of the PCBs 10
- 2-4 Appendixes 10
- 1-1-1 Specifications 11
- ‡fi ) ^& @ ! 0 9 8 6 5 1 17
- Light path 18
- Paper path 18
- 1-1-4 Drive system 19
- As viewed from machine rear 20
- 1-2-1 Drum 21
- 1-2-2 Developer and toner 21
- (1) Installation procedure 23
- Light source unit 1 pins 24
- Light source unit 2 pin 24
- Original detection switch 27
- Front cursor 28
- Rear cursor 28
- Drawer claw spacers 28
- Drawer spacers 28
- Fulcrum of the drawer lift 28
- Developing unit 30
- 12-pin connector 31
- Blue screws 31
- Waste toner tank 31
- Toner cartridge release lever 33
- 1-3-3 Copier management 36
- BVM4 × 6 screws 47
- BVM4 × 4 screw 47
- High temperature 47
- 2-pin receptacle 48
- 1-4-1 Maintenance mode 49
- U034 U066 U071 62
- Reference 64
- Description 65
- DF input light luminosity 65
- Setting range 65
- Initial setting 65
- 0 to 8 1 65
- 011 024 015 67
- 001 000 000 67
- 004 004 000 67
- (1) (2) (3) 70
- (4) (5) (6) 70
- (7) (8) (9) 70
- Toner sensor control voltage 74
- 0 to 255 155 74
- ≥ 1ST TEMP 77
- Maintenance cycle 85
- 0 to 600 100 1000 (copies) 85
- 0 to 200 (copies) 70 88
- U053 U065 U070 111
- Original Copy 112
- U034 U067 U072 113
- 1 2 3 122
- 4 5 6 122
- 7 8 9 122
- U402 U403 U404 143
- 1-5-1 Paper misfeed detection 152
- DFSW (ST) 1 154
- Paper size + 2000 ms 156
- DFSW (ST) 1* 157
- 5. Eject section 158
- 1-5-2 Self-diagnosis 163
- See page 1-5-22 168
- (13)Paper creases. Causes 173
- 1-5-4 Electrical problems 176
- 1-5-5 Mechanical problems 181
- Shaft handle retainer 184
- Paper feed cluth 184
- Cutout Stop ring 184
- Stop ring 185
- Upper paper feed pulleys 185
- Drawer drive motor 186
- Paper conveying unit 187
- Connector 187
- Lower left cover 187
- Bypass paper feed pulley 188
- Left registration roller 189
- Upper bypass cover 190
- (P. 1-6-36) 191
- (P. 1-4-14) 191
- • 15 cpm 192
- Figure 1-6-19b 192
- (P. 1-6-37) 194
- (P. 1-4-15) 194
- Figure 1-6-21b 195
- –1.5–1.5 196
- Figure 1-6-22b 199
- Right cover 200
- Contact glass 200
- Metal plate 200
- Scanner wire 201
- Scanner tension spring 201
- Scanner motor unit 202
- Frame securing tools 203
- Mirror 2 Frame 203
- Fan duct 205
- Laser scanner unit 205
- LSU front spacer 206
- LSU right spacer 206
- ISU cover 209
- Paper size switch 209
- Positioning pins 210
- Correct image 211
- Mirror 2 frame 212
- Figure 1-6-50b 216
- (P. 1-6-10) 217
- Scanner center line 218
- (P. 1-6-15) 219
- (P. 1-4-46) 219
- Image formation unit 221
- Drum shaft 224
- Drum drive grounding plate 224
- Doctor blade 225
- Adjustment screws 225
- Transfer roller assembly 226
- Cleaning blade 227
- M3 retainers 228
- Cleaning lower seal assembly 228
- 1-6-9 Fixing section 229
- Fixing unit thermister 230
- Heat roller separation claws 230
- Fixing heater 231
- Press springs 233
- Press roller 234
- 1-7-1 Replacing the main PCB 235
- Upper shield 237
- • Inverter PCB: VR1, VR2 240
- 2-1-1 Paper feed section 241
- Tungsten wire 244
- Main charger assembly 244
- Shield grid 244
- 2-1-3 Optical section 246
- 2-1-4 Developing section 250
- Cleaning spiral 257
- Lower cleaning seal 257
- Cleaning lamp (CL) 258
- Light-blocking lumirro 258
- 2-1-8 Fixing section 259
- 2-2-1 Electrical parts layout 261
- 2-3-2 Main PCB 269
- REV:2 270
- 2-3-3 CCD PCB 279
- 2-3-4 Laser diode PCB 280
- 2" × 8 283
- /2" × 8 286
- (20 cpm copier) 290
- Maintenance parts list 291
- • Copier 292
- • Optional drawer 294
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