Utax cd 1120

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2DA/2DB

1-5-2

(2) Paper misfeed detection conditions

Figure 1-5-2

ESW

FSSW

RSW

PFCL

RM

DUPPCSW

DUPFCL

BYPPFSOL

PCSW

DPTSW

OSBSW

OCM OFM

DPFCL1

DFSW1

DFSW2

DPFCL2

DPFCL3

Table of Contents

Service Manual1
Safety Precautions5
Installation Precautions7
Table of Contents10
Specifications14
Parts Names and Their Functions16
- Mfp16
- Operation Panel17
Machine Cross Section18
Drive System19
Drum20
Toner20
Installation Environment21
Unpacking and Installation22
- Installation Procedure22
Setting Initial Copy Modes27
Installing the Paper Feeder (Option)28
Installing the DP (Option)32
Installing the Duplex Unit (Option)36
Installing the Drawer Heater (Option)39
Installing the Key Counter (Option)42
Installing the Finisher (Option)45
Installing the Job Separator (Option)53
Installing the Fax System (Option)58
Installing the Scan System (Option)66
Installing the Hard Disk (Option)68
Maintenance Mode69
- Executing a Maintenance Item69
- Maintenance Modes Item List70
- Contents of Maintenance Mode Items73
- Management Mode122
- Paper Misfeed Detection129
- Self-Diagnosis145
  - Self-Diagnostic Function145
  - Self-Diagnostic Codes146
- Image Formation Problems154
- Image Is Blurred158
- The Leading Edge of the Image Is Consistently Misaligned with the Original158
- The Leading Edge of the Image Is Sporadically Misaligned with the Original159
- Paper Creases159
- Offset Occurs159
- Image Is Partly Missing160
- Fixing Is Poor160
- Image Is out of Focus160
- Image Center Does Not Align with the Original Center161
Electrical Problems162
- The Machine Does Not Operate When the Power Switch Is Turned on162
- The Drive Motor Does Not Operate (C2000)162
- The Registration Motor Does Not Operate162
- The Exit Motor Does Not Operate162
- The Scanner Motor Does Not Operate163
- Cooling Fan Motor 1 Does Not Operate163
- Cooling Fan Motor 2 Does Not Operate163
- Cooling Fan Motor 3 Does Not Operate163
- The Exposure Lamp Does Not Turn off164
- The Fixing Heater Does Not Turn on (C6000)164
- The Fixing Heater Does Not Turn off164
- Main Charging Is Not Performed164
- A Paper Jam in the Paper Feed, Paper Conveying or Fixing Section Is Indicated When the Power Switch Is Turned on166
- The Message Requesting Covers to be Closed Is Displayed When the Front Cover and Left Cover Are Closed166
- Others166
Mechanical Problems167
- No Primary Paper Feed167
- No Secondary Paper Feed167
- Skewed Paper Feed167
- The Scanner Does Not Travel167
- Multiple Sheets of Paper Are Fed at One Time167
- Paper Jams167
- Toner Drops on the Paper Conveying Path168
- Abnormal Noise Is Heard168
- Precautions for Assembly and Disassembly169
  - Precautions169
  - Running a Maintenance Item170
- Paper Feed Section171
- Optical Section190
- Drum Section206
- Developing Section209
  - Detaching and Refitting the Developing Unit209
- Transfer Section210
  - Detaching and Refitting the Transfer Roller210
- Fixing Section211
- Upgrading the Firmware on the Main PCB219
- Upgrading the Printer Board Firmware220
- Adjustment-Free Variable Resisters (VR)221
Paper Feed Section222
Optical Section225
- Original Scanning226
- Image Printing227
Drum Section229
Developing Section231
- Formation of Magnetic Brush232
- Single Component Developing System233
Transfer and Separation Sections234
Fixing Section236
- Fixing Temperature System237
- Fixing Temperature Control Based on Ambient Temperature237
Exit and Switchback Sections238
Duplex Section239
- Paper Conveying Operation in Duplex Copying240
Electrical Parts Layout241
- Pcbs241
- Switches and Sensors242
- Motors244
- Other Electrical Components245
Power Source PCB246
Main PCB249
Engine PCB253
Printer Board PCB259
Operation Unit PCB263
CCD Pcb266
Maintenance Parts List275
Periodic Maintenance Procedures276
General Wiring Diagram278

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