PDA

View Full Version : Konica C7000 have a problem with black color.


Custom Search


cxtqd
08-14-2016, 11:08 AM
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
3384533846338473384833849

Synthohol
08-14-2016, 02:56 PM
have you performed the several adjustments after replacing the printhead?

cxtqd
08-14-2016, 04:35 PM
I have adjustments Writing Initial Pos.., gammar adj, color registration

Synthohol
08-14-2016, 05:49 PM
here is the list of adjustments in case you didnt use the manual.
good luck!

"> • When reinstalling the writing units, be sure to check that
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
08-15-2016, 08:05 AM
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
08-15-2016, 08:25 AM
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
3384533846338473384833849[/QUOTE]

cxtqd
08-15-2016, 08:47 AM
Replace NVRAM means you have to have a different C7000?

silviux
08-15-2016, 09:15 AM
Replace NVRAM means you have to have a different C7000?


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

cxtqd
08-18-2016, 05:33 PM
Thanks Silviux, I don't think so NVRAM.
I'll check it again.

Have you any other idea?

33886

silviux
08-19-2016, 04:17 PM
Thanks Silviux, I don't think so NVRAM.
I'll check it again.

Have you any other idea?

33886


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 ?

Custom Search