Konica 8050 colour problem

[radymob]

I have konica 8050 with colour problem. This problem start with a blue backgroud on page with text and one photo, restarted the copier no more blue backgroud on print, but all colours are very bad.
I performe "Test pattern density" on 255 and all colours are OK. I'm confused where can be the problem.
I attached one example off how it print.7514

[mrwho]

If the machine's interal patterns come out ok, seems like you've got some problem related to the print controller. What happens if you try to print the controller's test pattern (the one with the fish on it)? Post it here, if possible.

You could check the controller's data cable, for starters.

[radymob]

7516Test page,
I,ve also change my Fiery ( i have two), and the problem persist

[bigdcopy]

have you tried to calibrate the controller (auto cal if you don't have a spectrometer), also check the gradation levels in the printer gamma adjustment



KONICA MINOLTA 8050 Field Service Ver.2.0 Apr. 2004 36 MODE
1-81

I ADJUSTMENT

1

7.4.2 Printer gamma adjustment

When the color reproduction is in poor condition,
conduct this adjustment to correct gradation.

A. Procedure
(1) Printer gamma offset adjustment

Conduct this adjustment when the color reproduction
varies with copy modes to correct the gradation
in a high light density section and adjust the density
in the background.

Note:
• For the printer gamma offset adjustment,
adjustment methods of 0 to 5 are available for
each screen type. It is possible to divide the
gradation in 256 into 6 parts of 0 to 5 and
adjust the entire ranges from "0: Low density
section" to "5: High density section."
• In default, adjustment is limited only to "0 (low
density section)." When setting DIPSW 28-4 to
1, adjustment can be made on the entire
ranges of 0 to 5.
• Be sure not make the adjustment of "Printer
gamma offset adjustment (ED-8) (0 to 5)."
a. Procedure

1. Enter the 36 mode.

2. "36 mode menu screen"
Press the [3. Image quality adjustment] key.

3. "Image quality mode menu screen"
Press the [2. Printer gamma adjustment] key.

4. For the printer gamma adjustment, the following
items are provided:
[1. Printer gamma offset adj.]
[2. Printer gamma sensor adj.]
[3. Printer screen gradation adj.]

5. Press the key of an item you want to adjust.

6. Press the [PREVIOUS SCREEN] key to return
from each of adjustment screen to the "Printer
gamma adjustment menu screen."

1. Enter the 36 mode.

2. "36 mode menu screen"
Press the [3. Image quality adjustment] key.

3. "Image quality mode menu screen"
Press the [2. Printer gamma adjustment] key.

4. "Printer gamma adjustment menu screen"
Press the [1. Printer gamma offset adj.] key.

after doing this do auto gama to lock it in

[Stirton.M]

I have konica 8050 with colour problem. This problem start with a blue backgroud on page with text and one photo, restarted the copier no more blue backgroud on print, but all colours are very bad.
I performe "Test pattern density" on 255 and all colours are OK. I'm confused where can be the problem.
I attached one example off how it print.7514


If internal test prints do not yield results, the only thing that can be an indicator of an issue is the VIF, cable or fiery. Since you replaced the fiery and the problem persists, it may be the cable or the VIF card. Swap the cable around so the connectors are reversed. Check the VIF and ensure it has a good connection internally.

And FYI, on issues like this, best to do halftone tests at half density...120-150 or so...setting at 255 can hide issues like this if it is the mainbody.

[radymob]

Thank you all, it was cable between printer and controller

[mrwho]

Thank you all, it was cable between printer and controller

Another satisfied customer. :)