Muratec MFX-C4000 Field Engineering Manual page 186

Problem Description
Horizontal White
Line(s)
(continue..)
Horizontal Sharp
Line(s) for a
Particular Color
Horizontal Sharp
Line(s) for Multiple
Colors of 78mm gap
Horizontal Thick
Band(s) for a
Particular Color
Service Manual
Alignment & Troubleshooting
Cause Description
1. Mis-Contact on T1
and/or Charging
Bias
2. Electrostatic Noise
(continue..)
1. Mis-Contact on
Charging Bias
2. Unstable T1 Transfer
Bias
1. Unstable T2 Transfer
Bias Contact
1. Unstable Charging
Bias
2. Unstable Transfer
Bias
Action to Resolve
[2. Electrostatic Noise]
2.1) Check and confirm Dev Bias for the color [TM #106-
0000~003], If there is any wrong value, change the value.
2.2) Check the connection state between the Imaging unit and
Bias harness.
2.3) Check the Dev Bias for the color [EDC #106-0000~003]. If
the value has any noies, replace the HVPS
[1. Mis-Contact on Charging Bias]
1.1) 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].
1.2) Turn on the Charging Bias for the color [EDC #105-
0000~0003] If any mis-reading on the MHV value, replace
HVPS-L PBA.
1.3) Check the OPC grounding. If the grounding is defective,
replace the Imaging unit.
[2. Unstable T1 Transfer 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 T1 Bias for the color[TM #107-
0000~0007], If there is any wrong value, change the value.
1.3) Read the T1 Bias value[EDC #107-0000~003]. If any mis-
reading on the MHV value, replace HVPS PBA.
1.4) Check the ITB grounding. If the grounding is defective,
replace the ITB.
[1. Unstable T2 Transfer Bias Contact]
1.1) Check the connection harness of T2 Bias.
1.2) Check the confirm THV2 bias [TM #107-0008~0009].
If there is any wrong value, change the value. [TM #107-
0008~0009]
1.3) Read the THV2 bias[EDC #107-0005]. If it is defective,
replace the HVPS.
1.4) Check the ITB Drive Roller Ground. If it is defective, replace
the ITB.
[1. Unstable 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 and confirm the Charge Bias [EDC #105-0000~003].
If there is a noise, check the ITB grounding.
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