Ld Adjustment - Konica Minolta Magicolor 8650 Service Manual

Konica minolta magicolor 8650 laser printer service manual

Hide thumbs Also See for Magicolor 8650:

Table of Contents

10. Service Mode

LD adjustment

A. LD Red delay adj.

B. LD light balance

• This function adjusts the LD lightness balance between the two LDs to correct the dif-

ference of LD lightness between the LDs.

• This setting is made after the PH unit or the service EEPROM board is replaced.

• This adjustment is made to prevent uneven density in highlighted halftone area being

caused by inappropriate laser intensity.

1. Select [Service Mode] → [MachineAdjustment] → [LD Adjust] → [LD Light balance].

2. Select [Print] → [For adjustment] and press Menu/Select key.

3. The test print includes seven rows of patterns produced with different levels of LD2

light intensity towards LD1.

4. Three squares each made up by four small squares are printed with the different four

colors. The two small squares diagonal to each other are printed using the same LD.

Depending on individual print timing, it is decided that which pair of small squares

corresponds to which LD.

The pair of small squares where image density changes corresponds to LD2.

5. From the test pattern, select the pattern where the least density difference appears

between LD1 and LD2 for each color.

6. Enter the adjustment value corresponding to the pattern you selected (see the above

illustration) or a value close to the adjustment value using the

7. Select [For effectiveConf] and press Menu/Select key.

8. Check that LD2 small squares have no image noise of woodgrain.

Confidential – for internal use only, do not distribute

Field Service Ver. 2.0 Nov. 2007

A00JF3C527DA

Table of Contents