Konica C7000 have a problem with black color.

[cxtqd]

Hello, KM C7000 have a problem with black color, it blurry (see photo attach).
I have replaced the drum, charge, belt, transfer belt, develop, develop unit, laser K but all wrong
Please give me any ideas to solve, thanks
IMG_20160814_084133.jpgIMG_20160813_151835.jpgIMG_20160813_160433.jpgIMG_20160813_224828.jpgIMG_20160813_180008.jpg

[Synthohol]

Re: Konica C7000 have a problem with black color.

have you performed the several adjustments after replacing the printhead?

[cxtqd]

Re: Konica C7000 have a problem with black color.

I have adjustments Writing Initial Pos.., gammar adj, color registration

[Synthohol]

Re: Konica C7000 have a problem with black color.

here is the list of adjustments in case you didnt use the manual.
good luck!

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each of them is inserted straight.
6. Reinstall the above parts following the removal steps in reverse.
7. After replacing the writing unit /K, conduct the following item.
- Cleaning the dust proof glass (Refer to F.5.2.1 - Cleaning the
dust proof glass)
- Writing initial position memory (Skew initial position memory)
(Refer to I.5.3.9 Skew Initial Position Memory (Printer Adjustment -
Writing Initial Pos. Memory))
- I/O Check Mode (LD1 to LD8 alarm data clear, LD alarm
measurement) (Refer to I.5.7.1 I/O Check Mode)
- CD-Mag. Skew Adj. (Refer to I.5.3.13 CD-Mag. Skew Adj.
(Printer Adjustment))
- Restart Timing Adjustment (Refer to I.5.3.1 Restart Timing
Adjustment (Printer Adjustment))
- Color Registration Auto.Adj. (Refer to I.5.3.10 Color Registration
Auto.Adj. (Printer Adjustment))
- Color Registration Manual (Refer to I.5.3.11 Color Registration
Manual (Printer Adjustment))
- Gamma Automatic Adjustment (Refer to I.5.4.7 Gamma
Automatic Adj. (Drum Peculiarity Adjustment))
- Beam Pitch Adjustment (Refer to I.5.3.14 Beam Pitch Adjustment
(Printer Adjustment))
- Moire Adjustment (Refer to I.5.3.15 Moire Adjustment (Printer
Adjustment))

[cxtqd]

Re: Konica C7000 have a problem with black color.

Thank you Synthohol.
I have done your way, I also have service manual for C7000, when replacing any parts I have to do the right process. But the situation doesn't improve.

[silviux]

Re: Konica C7000 have a problem with black color.

Excuse my English.
I had the same problem on a C6000 and solved by replacing the NVRAM ( k laser beams out of sync )



QUOTE=cxtqd;528249]Hello, KM C7000 have a problem with black color, it blurry (see photo attach).
I have replaced the drum, charge, belt, transfer belt, develop, develop unit, laser K but all wrong
Please give me any ideas to solve, thanks
IMG_20160814_084133.jpgIMG_20160813_151835.jpgIMG_20160813_160433.jpgIMG_20160813_224828.jpgIMG_20160813_180008.jpg[/QUOTE]

[cxtqd]

Re: Konica C7000 have a problem with black color.

Replace NVRAM means you have to have a different C7000?

[silviux]

Re: Konica C7000 have a problem with black color.

Replace NVRAM means you have to have a different C7000?

No, it means that for the NV Ram must contact KonicaMinolta

[cxtqd]

Re: Konica C7000 have a problem with black color.

Thanks Silviux, I don't think so NVRAM.
I'll check it again.

Have you any other idea?

IMG_20160814_084133(1).jpg

[silviux]

Re: Konica C7000 have a problem with black color.

Thanks Silviux, I don't think so NVRAM.
I'll check it again.

Have you any other idea?

[ATTACH=CONFIG]33886[/ATTACH]

Printer image processing board
Printer control board

you have tried to reverse the k laser wiring that goes to Printer image processing board with another laser ?