Image Quality Problems; Descriptions Of The "State Confirm" Function Of Tech. Rep. Mode Concerning Image Quality Problems; Table - Minolta CF2002 Service Manual

4.

IMAGE QUALITY PROBLEMS

4-1. Descriptions of the "State Confirm" Function of Tech. Rep.
Mode Concerning Image Quality Problems
• 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.
(1)

Table #

Vb-C/-M/-Y/-Bk
• Shows the developing bias value of each
color of toner when an image is produced.
• Standard values: Around 400 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>
4025T569CA
IU, High Voltage Unit (Developing Bias)
Vg-C/-M/-Y/-Bk
• Shows the grid voltage value of each color
of toner when an image is produced.
• Standard values: Around 550 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>
4025T569CA
IU, High Voltage Unit (Developing Bias)
T-71
4025T568CA