konica minolta 253 testpage

[balendran]

i have konica minolta c253 copier. in that machine their is a alliment problem please help me

[stevena86]

Are the guides in the paper tray set firmly against the paper?

[copier addict]

Are you asking about the skew or the colour shift in cyan and yellow?
Check the cyan and yellow printhead adjustments

[rrrohan]

Are you asking about the skew or the colour shift in cyan and yellow?
Check the cyan and yellow printhead adjustments

I wouldnt be surprised if the print heads needed replacing. fairly common issue

Are the guides in the paper tray set firmly against the paper?

this would explain paper skew but not the individual skew of certain colours

[stevena86]

Haha, I didn't even see the color shift. I loaded the image and saw the skew and typed my reply and moved on.

[mikeena]

Haha, I didn't even see the color shift. I loaded the image and saw the skew and typed my reply and moved on.

lmao at first i saw the skew as well. but then noticed the color shift. i dont have a 253 near me so i can give you what the book says
Scanner system: abnormal image
A. Typical faulty images
B. Troubleshooting procedure


Data on
previous page
Data on
current page
Step Section Check item Result Action
1
Cable connecting
scanner and
printer
Connector is connected properly
with no pins bent.
NO Reconnect.
2
Image processing
board (IPB)
Connectors on the image processing
board are connected properly.
NO Reconnect.
3
MFP board
(MFPB)
Data on previous page is mixed
with data on current page.
NO Reinstall the memory.
4
Test Mode
[Service Mode]
The problem is eliminated as
checked with the image on a test
pattern produced.
NO Change interface connection
cable.
5
Image processing
board (IPB)
The problem is eliminated after the
interface connection cable has
been changed.
NO Change image processing
board.
6
Printer control
board (PRCB)
PH relay board
(REYB/PH)
Check the connection of connectors,
harness, and flat cables
between PRCB and REYB/PH, and
correct if necessary.
NO Change printer control board.
Change PH relay board.
7
MFP board
(MFPB)
The problem has been eliminated
through the checks of steps up to 6.
NO Change MFP board.






I believe but may be wrong in tech mode there is color regis. check it
also check these areas as well


10.4.4 Printer Area.............................................. ................................................. 348
10.4.5 Scan Area.............................................. .................................................. . 353




10.4.6 Printer Resist Loop .................................................. ................................. 357
10.4.7 Color Registration Adjustment .................................................. ................ 358


10.4.9 LD adjustment........................................ .................................................. . 359


10.6 Imaging Process Adjustment .................................................. .......................... 362
10.6.1 Gradation Adjust .................................................. ..................................... 362

these are all pages in the service manual. if you dont have it let me know i can get it to you

[EarthKmTech]

ive seen this when the print heads start to fail too. We are ofcourse all assuming the idc sensors are clean and the basics have been checked and that you are a technician.

of the failures i've experienced with print heads its always been the polygon motors seizing up, or once one mirror exploded into shrapnel and blew an icp on the prcb but thats only ever happend once.

[copyman]

Before doing anything I would try swapping out the yellow image unit. Like the other poster said if not done already then clean sensors. Then do gradation adj.