Dell 2145cn Technical Information Page 48
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Disassembly and Reassembly
3-1
When you disassemble and reassemble
components, you must use extreme caution. The
close proximity of cables to moving parts makes
proper routing a must.
If components are removed, any cables disturbed
by the procedure must be restored as close as
possible to their original positions. Before removing
any component from the machine, note the cable
routing that will be affected.
Whenever servicing the machine, you
must perform as follows:
1. Check to verify that documents are not stored in
memory.
2. Be sure to remove the toner cartridge before you
disassemble parts.
3. Unplug the power cord.
4. Use a flat and clean surface.
5. Replace only with authorized components.
6. Do not force plastic-material components.
7. Make sure all components are in their proper
position.
Releasing Plastic Latches
Many of the parts are held in place with plastic
latches. The latches break easily; release them
carefully.
To remove such parts, press the hook end of the
latch away from the part to which it is latched.
3. Disassembly and Reassembly
3.1 General Precautions on Disassembly
- 1
- 6HUYLFH0DQXDO 1
- Table of Contents 3
- Continued 4
- 1. Precautions 7
- 1.2 Caution for safety 8
- 1.2.3 Handling Precautions 9
- Precautions 10
- 1.3 ESD Precautions 11
- 2. Product spec and feature 12
- 2.1.2 Specifications 13
- Product spec and feature 14
- 2.1.2.3 Interface 15
- 2.1.2.4 Scan 15
- 2.1.2.5 Copy 16
- 2.1.2.6 Fax 17
- 2.1.2.7 Paper Handling 19
- 2.1.2.8 CRU 20
- 2.1.2.9 FRU 21
- ■ Machine Life 22
- 2.1.2.11 Environment 23
- 2.1.2.12 Option 24
- 2.1.3 Competitor Model 25
- 2.2 System Overview 26
- ■ Engine Layout 27
- : Simplex 28
- : Duplex 28
- 2.2.1 Main parts of system 29
- 2) Transfer Roller 30
- 3) FCT (First Cassette Tray) 30
- 4) SCT (Second Cassette Tray) 30
- 5) MPT (Multi Purpose Tray) 31
- 6) Toner Cartridge 31
- 7) Fuser Unit 32
- 9) Main Drive Unit 33
- 10) DEVE Drive Unit 33
- 13) Main Controller PBA 34
- 14) Drive PBA 34
- 15) DEVE CRUM PBA 34
- 16) Reverse Ass’y 34
- 17) Scan Part 35
- IP Block Diagram 36
- 18) FAX section 37
- 1) Modem Side 38
- 2) DAA Side 38
- 3) Speaker Driver 39
- 2.2.2 H/W Configuration 40
- 2.2.2.1 Main Board 41
- Chorus 3 Architecture 42
- Memory Interface 42
- I/O Interface 42
- 2.2.2.2 Power Flow 43
- • Zero crossing photo triac 46
- • 1 lamp (800W) Pulse control 46
- ■ Input/Output connector 47
- 3. Disassembly and Reassembly 48
- 3.3 Disassembly Procedure 52
- 3.3.2 Cover Front Ass’y 53
- Disassembly and Reassembly 54
- 4. Done 55
- 3.3.4 SCAN Ass’y 56
- 3.3.5 DADF 57
- 3.3.6 Reverse Ass’y 58
- 3.3.7 COVER MIDDLE Ass’y 59
- 3.3.8 HVPS 60
- 3.3.9 Main Board 60
- 3.3.10 SMPS Board 61
- 3.3.11 Fuser Control Board 61
- 3.3.12 LSU 62
- 3.3.13 CRUM 63
- 3.3.14 Fuser Drive Ass’y 63
- 3.3.15 Pick up roller 64
- 4.1 Alignment and Adjustments 65
- ■ Clearing paper jams 67
- ■ Paper Path 68
- Alignment and Troubleshooting 69
- misfed paper 74
- 4.1.3.5 In the optional tray 76
- 4.1.4 System setup 77
- 4.1.4.2 Menu overview 78
- 4.1.4.3 Maintenance 79
- ■ PRINTING REPORTS 79
- Printing a report 80
- ■ CLEARING MEMORY 84
- ■ CLEANING YOUR MACHINE 85
- Cleaning the outside 85
- Cleaning the inside 85
- Cleaning the scan unit 86
- ■ MAINTAINING THE CARTRIDGE 87
- Toner cartridge storage 87
- Expected cartridge life 87
- Redistributing toner 87
- ■ MAINTENANCE PARTS 92
- Checking replaceables 93
- Replacing the DADF rubber pad 93
- 4.1.4.5 F/W Upgrade 97
- 1) Using button 97
- 2) Using SWS 98
- 4.1.4.6 EDC Mode 99
- ■ Method to enter 99
- ■ EDC Menu 99
- 0. Cover Status 99
- 1. Sensor Status 100
- 2. Motor Test 100
- 3. Fan Test 100
- 4. Clutch/Sol 101
- 5. Fuser Ctrl 101
- 6. LSU Control 101
- 7. DEV Control 102
- 8. Reset Param 102
- 9. Print Test 102
- 4.1.4.7 Tech Mode 103
- ■ How to Enter Tech Mode 103
- Never change settings 104
- < Method > 105
- 4.1.5 Error Message 107
- -genuine cartridge 111
- 4.2 Troubleshooting 112
- Image quality problems 113
- Digital Printer 114
- 7) Uneven Density 119
- Digital 121
- Digital Pri 121
- 11) Ghost 123
- 4.2.3 Paper feed problems 124
- 2) JAM 0 125
- 3) JAM 1 126
- 4) JAM 2 127
- 5) Reverse JAM 0 128
- 6) Rear Cover 129
- 7) Reverse JAM 1 130
- 8) Paper rolled in the fuser 131
- 4.2.4 Copy Problems 132
- 2) Scan Lock Error 133
- 3) Glass Broken 134
- 4.2.5 OPE Problems 135
- 4.2.6 Other Problems 136
- Fuser error 137
- 2) No Power(1) 138
- No Power(2) 139
- 3) LSU Error 140
- View and Parts list 141
- Thumbnail 1 142
- Thumbnail 2 143
- 5.1 Main 144
- Main Parts List 145
- 5.2 Cover Unit 147
- Cover Unit Parts List 148
- 5.3 Front Cover 149
- Front Cover Parts List 150
- 5.4 MP Tray 151
- MP Tray Parts List 152
- 5.5 Middle Cover 153
- Middle Cover Parts List 154
- 5.6 Reverse Unit 155
- Reverse Unit Parts List 156
- 5.7 Top Cover 157
- Top Cover Parts List 158
- 5.8 Reverse Frame 159
- Reverse Frame Parts List 160
- 5.9 Reverse Drive 161
- Reverse Drive Parts List 162
- 5.10 Frame 163
- Frame Parts List 164
- 5.11 Feed Drive 165
- Feed Drive Parts List 166
- 5.12 Fuser Unit 167
- Fuser Unit Parts List 168
- 5.13 Fuser Drive 170
- Fuser Drive Parts List 171
- 5.14 PTB 172
- PTB Parts List 173
- 5.15 Scan Ass’y 175
- Scan Ass’y Parts List 176
- 5.16 Hinge Unit 177
- Hinge Unit Parts List 178
- 5.17 OPE 179
- OPE 4in1 Parts List 180
- 5.18 Platen Ass’y 181
- Platen Ass’y Parts List 182
- 5.19 DADF Ass’y 184
- DADF Ass’y Parts List 185
- 5.20 Platen Cover DADF 186
- Platen Cover DADF Parts List 187
- 5.21 DADF lower 188
- DADF lower Parts List 189
- 5.22 DADF Motor 190
- DADF Motor Parts List 191
- 5.23 Cassette 192
- Cassette Parts List 193
- 5.24 SCF Unit 195
- SCF Unit Parts List 196
- 5.25 SCF Cassette 198
- SCF Cassette Parts List 199
- 6. System Diagram 200
- 6.2 Connection Diagram 201
- System Diagram 202
- 7. Reference Information 205
- Printer 206
- Printer Language 207
- Printer Language-Color 207
- Reference Information 208
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