Muratec MFX-C4000 Field Engineering Manual page 192

Problem Description
Auger Marks (thick
slanted white band)
Carriers on Printed
Image
Service Manual
Alignment & Troubleshooting
Cause Description
1. Low Toner
Concentration
2. Developer Loss
1. High OPC Surface
Potential
Action to Resolve
[1. Low Toner Concentration]
1.1) In case of Low Toner Concetration.
1.2) Check the T/C control value [TM #111-0006~0017]. If there
is any problem, change the value.
1.3) After operate Main , Black OPC/DEVE, Color OPC,
Color Deve BLDC Motor [EDC #100-0000], [EDC #100-
0002],[EDC #100-0004],[EDC #100-0006], operate the
toner supply motor for 10 sec [EDC #111-0000~0003].
Check the printed image.
1.4) If the problem is improved by toner supply, change the T/C
control value to raise the T/C [TM #111-0006~0017].
[2. Developer Loss]
2.1) The problem occurs because of the low toner.
2.2) Check the abnormal developing condition was occured by
the defective environmantal sensor.
2.3) Check the Charge Bias TM #105-0010~0016] and Deve
Bias [TM #106-0000~0003]. If there is any wrong value,
change the value.
2.4) Check the Charge Bias [EDC #105-0000~003]. If it is
defective, replace the HVPS.
2.5) Check the Deve Bias[EDC #106-0000~003]. If it is
defective, replace the HVPS.
2.6) If Charge bias and HVPS are normal, replace the
developing unit.
[1. High OPC Surface Potential]
1.1) The problems occurs because of abnormal charge/deve
conditions.
1.2) Check the environmental sensor.
1.3) Check the Charge Bias TM #105-0010~0016] and Deve
Bias [TM #106-0000~0003]. If there is any wrong value,
change the value.
1.4) Check the Charge Bias [EDC #105-0000~003]. If it is
defective, replace the HVPS.
1.5) Check the Deve Bias[EDC #106-0000~003]. If it is
defective, replace the HVPS.
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