Muratec MFX-C4000, Field Engineering Manual

Page: 185 / 280

Alignment & Troubleshooting
Service Manual
4-79
Problem Description Cause Description Action to Resolve
Vertical Irregular
Image Density for All
Colors
1. Unbalanced T2
Transfer
[1. Unbalanced T2 Transfer]
1.1) Check the THV value.[EDC #107-0005] If there is any
wrong value, replace the HVPS
1.2) Check the T2 Engage/Disenage Motoer[EDC #100-0010].
If it is defective, replace the T2 Engage Motor.
1.3) Check the T2 Engage/Disenage sensor [#EDC #100-0011].
If it is defective, replace the sensor.
1.4) When checking T2 Engage/Disenage [#EDC #100-0010],
check that the T2 Roller work or not. If not work, replace
the T2 Unit.
1.5) Check the ITB Drive Roller Ground. If it is defective, replace
the ITB.
Image Density
Difference between
Right and Left Sides
for a Particular Color
1. Unbalanced T1
Transfer Roller Nip
[1. Unbalanced T1 Transfer Roller Nip]
1.1) Check that the Front Cover is locking properly.
1.2) Take out the ITB and check the T1 roller state. If it is
defective, replace the ITB.
Image Density
Difference between
Right and Left Sides
for All Colors
1. Unbalanced T2
Transfer Roller Nip
[1. Unbalanced T2 Transfer Roller Nip]
1.1) Check that the Side Cover is locking properly.
1.2) Check the T2 Engage/Disenage Motoer[EDC #100-0010].
If it is defective, replace the T2 Engage Motor.
1.3) Check the T2 Engage/Disenage sensor [#EDC #100-0011].
If it is defective, replace the sensor.
1.4) When checking T2 Engage/Disenage [#EDC #100-0010],
check that the T2 Roller work or not. If not work, replace
the T2 Unit.
1.5) Check the ITB Drive Roller Ground. If it is defective, replace
the ITB.
Horizontal White
Line(s)
1. Mis-Contact on T1
and/or Charging
Bias
2. Electrostatic Noise
[1. Mis-Contact on T1 and/or Charging Bias]
1.1) Take out the ITB and check the T1 roller conditions. If it is
defective, replace the ITB.
1.2) Check and confirm MHV Bias for the color [TM #105-
0010~0016]. If there is any wrong value, change the value
[TM #105-0010~0016].
1.3) Turn on the Charging Bias for the color [EDC #105-
0000~0003]
1.4) Read the MHV value for the color [EDC #105-0004~0007]
1.5) If any mis-reading on the MHV value, replace HVPS-L PBA.
1.6) Check the OPC grounding. If the grounding is defective,
replace the Imaging unit.
1.7) Check the ITB grounding. If the grounding is defective,
replace the ITB unit.