Chapter 3 Image Quality Troubleshooting
3.2 Image Quality Troubleshooting
3-20
IQ-8
Vertical blanks
Possible causative parts
- IIT ASSY (PL21.1.14)
- DADF ASSY (PL21.1.1)
- Transfer Unit [ROLL ASSY-TRANS CRU] (PL6.1.1)
- Drum Cartridge [XERO ASSY] (PL8.1.1)
- FUSING UNIT (PL7.1.1)
- ROS ASSY (PL2.1.1)
Step
Check and Action
Yes
No
1
Checking the error mode.
Does the error occur only during copying?
Go to step 2.
Go to step 4.
2
Checking the original.
Is the original color clean?
Go to step 3.
End, change the
original.
3
Checking the platen glass and DADF Feed Roller.
Are there any damages or foreign substance?
Remove the for-
eign substances
or Clean up the
IIT/DADF. If
platen glass has
been damaged,
Replace the IIT
ASSY (REP
21.1). Then go to
step 4.
Go to step 4.
4
Checking the Print.
Print the [Pitch Chart] in [Chart] in [Maintenance] of [Admin
Menu].
When the partial lacks of periodicity are observed, check the
defective parts by comparing the printed partial lacks with the
Pitch Chart.
Are there any partial lacks matching the chart?
Printing data is
incorrect, then
check the print-
ing data which
the problem gen-
erated.
End of work.
Go to step 5.
5
Checking the paper.
Is the installed paper with a new and dry one? Or does the
paper satisfy the specification?
Go to step 6.
Replace the
paper with a new
and dry one. Or
change the
paper to the one
that satisfies the
specification.
Then go to step
6.
6
Clean inside the printer by using the cleaning rod. (Cleaning
the Raster Optical Scanner (ROS) Window.)
After the cleaning is completed, print the [Pitch Chart] in
[Chart] in [Maintenance] of [Admin Menu].
Is the image printed correctly?
End of work.
Go to step 7.
Summary of Contents for DocuPrint M355df
Page 1: ...DocuPrint M355df Service Manual 1st Edition ...
Page 2: ......
Page 4: ...Company Name Department Name Telephone No Full Name Employee No ...
Page 6: ......
Page 7: ...Preface ...
Page 13: ......
Page 14: ...Chapter 1 Service Call Procedure ...
Page 15: ......
Page 17: ......
Page 29: ...Chapter 1 Service Call Procedure 1 5 Periodic Replacement Parts 1 12 ...
Page 30: ...Chapter 2 Troubleshooting ...
Page 31: ......
Page 126: ...Chapter 3 Image Quality Troubleshooting ...
Page 127: ......
Page 129: ......
Page 170: ......
Page 171: ...Chapter 4 Disassembly Assembly and Adjustment ...
Page 172: ......
Page 179: ...Chapter 4 Disassembly Assembly and Adjustment 4 1 Preface 4 5 Figure 4 1 Printer ...
Page 226: ...Chapter 4 Disassembly Assembly and Adjustment 4 2 Removal Replacement 4 52 ...
Page 313: ...Chapter 5 Parts List ...
Page 314: ......
Page 318: ...5 2 Chapter 5 Parts List ...
Page 319: ...5 3 Chapter 5 Parts List 5 2 Parts list PL 1 1 UI Illustration ...
Page 321: ...5 5 Chapter 5 Parts List PL 2 1 ROS Illustration ...
Page 323: ...5 7 Chapter 5 Parts List PL 3 1 Drive Illustration ...
Page 325: ...5 9 Chapter 5 Parts List PL 4 1 NOHAD Illustration ...
Page 327: ...5 11 Chapter 5 Parts List PL 5 1 Dispenser Illustration ...
Page 329: ...5 13 Chapter 5 Parts List PL 6 1 Transfer Illustration ...
Page 331: ...5 15 Chapter 5 Parts List PL 7 1 Fusing Illustration ...
Page 333: ...5 17 Chapter 5 Parts List PL 8 1 Xerographics Illustration ...
Page 335: ...5 19 Chapter 5 Parts List PL 9 1 Tray Illustration ...
Page 337: ...5 21 Chapter 5 Parts List PL 10 1 Option Feeder 1 3 Illustration ...
Page 339: ...5 23 Chapter 5 Parts List PL 10 2 Option Feeder 2 3 Illustration ...
Page 341: ...5 25 Chapter 5 Parts List PL 10 3 Option Feeder 3 3 Illustration ...
Page 343: ...5 27 Chapter 5 Parts List PL 13 1 MSI 1 2 Illustration ...
Page 345: ...5 29 Chapter 5 Parts List PL 13 2 MSI 2 2 Illustration ...
Page 347: ...5 31 Chapter 5 Parts List PL14 1 Duplex Illustration ...
Page 349: ...5 33 Chapter 5 Parts List PL15 1 Registration 1 3 Illustration ...
Page 351: ...5 35 Chapter 5 Parts List PL15 2 Registration 2 3 Illustration ...
Page 353: ...5 37 Chapter 5 Parts List PL15 3 Registration 3 3 Illustration ...
Page 355: ...5 39 Chapter 5 Parts List PL17 1 Exit Illustration ...
Page 357: ...5 41 Chapter 5 Parts List PL18 1 Electrical 1 3 Illustration ...
Page 359: ...5 43 Chapter 5 Parts List PL18 2 Electrical 2 3 Illustration ...
Page 361: ...5 45 Chapter 5 Parts List PL18 3 Electrical 3 3 Illustration ...
Page 363: ...5 47 Chapter 5 Parts List PL19 1 Cover 1 2 Illustration ...
Page 365: ...5 49 Chapter 5 Parts List PL19 2 Cover 2 2 Illustration ...
Page 367: ...5 51 Chapter 5 Parts List PL21 1 IIT DADF Illustration ...
Page 369: ......
Page 370: ...Chapter 6 General ...
Page 371: ......
Page 376: ...Chapter 6 General 6 1 ...
Page 400: ...Chapter 6 General 6 3 Service Data Undescribed 6 25 6 3 Service Data Undescribed ...
Page 478: ...Chapter 7 Wiring Data ...
Page 479: ......
Page 481: ......
Page 491: ...Chapter 7 Wiring Data 7 2 Wire Network Undescribed 7 10 7 2 Wire Network Undescribed ...
Page 492: ...Chapter 7 Wiring Data 7 3 BSD Undescribed 7 11 7 3 BSD Undescribed ...
Page 495: ...Chapter 7 Wiring Data 7 4 Connection Wiring Diagram 7 14 7 4 2 General Wiring Diagram ...
Page 496: ...Chapter 7 Wiring Data 7 4 Connection Wiring Diagram 7 15 ...
Page 501: ...Chapter 7 Wiring Data 7 5 Interconnection Wiring Diagram of Parts 7 20 7 5 2 1 Power ...
Page 503: ...Chapter 7 Wiring Data 7 5 Interconnection Wiring Diagram of Parts 7 22 7 5 2 2 Drive ...
Page 505: ...Chapter 7 Wiring Data 7 5 Interconnection Wiring Diagram of Parts 7 24 7 5 2 3 ROS ...
Page 507: ...Chapter 7 Wiring Data 7 5 Interconnection Wiring Diagram of Parts 7 26 7 5 2 4 Xero HVPS ...
Page 509: ...Chapter 7 Wiring Data 7 5 Interconnection Wiring Diagram of Parts 7 28 7 5 2 5 Fusing ...
Page 511: ...Chapter 7 Wiring Data 7 5 Interconnection Wiring Diagram of Parts 7 30 7 5 2 6 Controller ...
Page 513: ...Chapter 7 Wiring Data 7 5 Interconnection Wiring Diagram of Parts 7 32 7 5 2 7 Scanner ...
Page 517: ......
Page 518: ...Chapter 10 Principle of Operation ...
Page 519: ......
Page 521: ......