Image quality problem bizhub C350 Field Service Ver. 2.0 April 2004
4-52
IV
Troubleshooting
4. Image quality problem
4.1 How to read Element date
• As part of troubleshooting procedures, the numeric values set for “State Confirm” avail-
able from “Tech. Rep. Mode” can be used to isolate the cause of the image problem.
4.1.1 Table #
4036fs4015e
4036fs4016e0
Vb-C
Vb-M
Vb-Y
Vb-Bk
• Shows the developing bias value of each color of toner when an image is produced.
• Standard values: Around 390 V
• A correction is made to make the image lighter when the numeric value is greater.
• A correction is made to make the image darker when the numeric value is smaller.
• Relevant Components : Imaging Unit, High Voltage Unit (Developing Bias)
Vg-C
Vg-M
Vg-Y
Vg-Bk
• Shows the grid voltage value of each color of toner when an image is produced.
• Standard values: Around 500 V
• A correction is made to make the image lighter when the numeric value is greater.
• A correction is made to make the image darker when the numeric value is smaller.
• Relevant Components : Imaging Unit, High Voltage Unit (Developing Bias)
FS4.fm Page 52 Tuesday, April 27, 2004 4:01 PM
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