Alignment & Troubleshooting
Service Manual
4-83
Problem Description
Cause Description
Action to Resolve
Vertical White Band
for Copy Job
1. Contaminations on
CCDM or Scanning
Window
2. Image Cell Error on
CCDM
[1. Contaminations on CCDM or Scanning Window]
[2. Image Cell Error on CCDM]
Vertical Band for a
Particular Color
1. Contaminations on
Charging Roller
2. OPC Cleaning Fail
3. OPC Scratch
[1. Contaminations on Charging Roller]
1.1) If the Charging roller is contaminated, replace the
developing unit.
[2. OPC Cleaning Fail]
2.1) Check that there is the vertical band on OPC after normal
printing. If the vertical band occurs, replace the developing
unit because of the defective OPC cleaning Blade.
[3. OPC Scratch]
3.1) If the OPC is scratched, replace the developing unit.
Vertical Dark Band
1. Contaminations on
Charging Roller
2. Slip on Charging
Roller
[1. Contaminations on Charging Roller]
1.1) If the Charging roller is contaminated, replace the
developing unit.
[2. Slip on Charging Roller]
Vertical Random
Streak
1. OPC Scratch
[1. OPC Scratch]
1.1) If the OPC is scratched, replace the developing unit.
Full Solid Black/
Color Image
1. Mis-Contact on
Charging Bias
2. Wrong Charging
Bias from HVPS
[1. Mis-Contact on Charging Bias]
1.1) Check and confirm the Charge Bias[TM #105-0010~0016].
If there is any wrong value, change the value.
1.2) Check the Charge Bias [EDC #105-0000~003]. If it is
defective, replace the HVPS.
1.3) Check the connection between the charging bias Harness
and the developing unit.
1.4) If the connection is OK, check the charging roller contact.
1.5) If the ITB contact is defective, replace the ITB.
[2. Wrong Charging Bias from HVPS]
2.1) Check the external temparature sensor and humidity
sensor.
2.2) If the sensor is normal, check the Charge Bias[TM #105-
0010~0016]. If or not, change the value.
2.3) Check the Charge Bias [EDC #105-0000~003]. If it is
defective, replace the HVPS.
2.4) If it is normal, check the contact between charge high
voltage harness and developing unit.
Summary of Contents for MFX-C4000
Page 2: ......
Page 14: ...Precautions Service Manual 1 6 ...
Page 35: ...Service Manual 2 21 Video Controller Power Distribution Product Specifications and Features ...
Page 37: ...Service Manual 2 23 Engine Controller Power Distribution Product Specifications and Features ...
Page 39: ...Service Manual 2 25 DADF Block Diagram Product Specifications and Features ...
Page 106: ...Maintenance and Disassembly Service Manual 3 44 ...
Page 216: ...Alignment Troubleshooting Service Manual 4 110 ...
Page 217: ...System Diagram Service Manual 5 1 5 System Diagram 5 1 Block Diagram 5 1 1 System ...
Page 218: ...System Diagram Service Manual 5 2 5 1 2 Video Controller ...
Page 219: ...System Diagram Service Manual 5 3 5 1 3 Engin Controller ...
Page 220: ...System Diagram Service Manual 5 4 5 1 4 OPE Unit ...
Page 221: ...System Diagram Service Manual 5 5 5 1 5 DADF ...
Page 222: ...System Diagram Service Manual 5 6 5 1 6 SCF HCF ...
Page 225: ...System Diagram Service Manual 5 9 5 2 3 OPE Unit ...
Page 226: ...System Diagram Service Manual 5 10 5 2 4 DADF ...
Page 227: ...System Diagram Service Manual 5 11 5 2 5 SCF HCF ...
Page 228: ...System Diagram Service Manual 5 12 ...
Page 237: ...Reference Information Service Manual 6 9 ...
Page 238: ...Reference Information Service Manual 6 10 ...
Page 239: ...Reference Information Service Manual 6 11 ...
Page 240: ...Reference Information Service Manual 6 12 ...
Page 279: ......