Muratec MFX-C4000 Field Engineering Manual page 185

Problem Description
Vertical Irregular
Image Density for All
Colors
Image Density
Difference between
Right and Left Sides
for a Particular Color
Image Density
Difference between
Right and Left Sides
for All Colors
Horizontal White
Line(s)
Service Manual
Alignment & Troubleshooting
Cause Description
1. Unbalanced T2
Transfer
1. Unbalanced T1
Transfer Roller Nip
1. Unbalanced T2
Transfer Roller Nip
1. Mis-Contact on T1
and/or Charging
Bias
2. Electrostatic Noise
Action to Resolve
[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.
[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.
[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.
[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.
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