Ir4570 copies upside comes very lighly????

[teckat]

i can't understand...

when i make copies s also same as it is oneside/bothsides upside lightly comes..

i am already post the images also...

when i make prints as it is all corners it will come full of quality,
like scan also scan to computer all sides full of quality allsides..

but when i make copies only like effected copies only... upside ...

like i want said to clearly ... when i make copies a4r / legal /a3 it will comes left side full of light copies out....

are you understand my problem....

Have u Check the slit glass
iR4570.jpg

[mrfixit51]

I might as well jump in here and take a stab at it...

As I understand the problem, if you make prints from a PC, the density is fine, I assume the same with internal test prints,,, if you make a copy, then you have the light image issue. The problem has nothing to do with the laser or the rest of the print engine. The scanner is where you have the issue. clean the optics and run CCD ADJust under service mode, and the scanner issue should be corrected.

[blazebusiness]

That machine doesn't even have a ccd array(MOS diode technology). Uses a contact image sensor(3 color LED technology). Funny that canon still calls the adjustment in service mode CCD adjust. Either way - Mr fixit is correct. CCD Adjust is for the CIS.

[teckat]

That machine doesn't even have a ccd array(MOS diode technology). Uses a contact image sensor(3 color LED technology). Funny that canon still calls the adjustment in service mode CCD adjust. Either way - Mr fixit is correct. CCD Adjust is for the CIS.

poster has not replied to where he placed that first copy - was it on the Glass or in the DF tray- it makes a big difference

also, if it is true that he says the SCAN from the 4570 is good=it appears to look good/ did he Scan using the DF or placing it on the Glass ?? Makes a difference.

need some answers on these ??????

[teckat]

That machine doesn't even have a ccd array(MOS diode technology). Uses a contact image sensor(3 color LED technology). Funny that canon still calls the adjustment in service mode CCD adjust. Either way - Mr fixit is correct. CCD Adjust is for the CIS.

4570
CCD array collects the reflected light coming through the rod lens
array.
The machine's CCD sensor is a 1-line linear image sensor consisting of 7488 photocells. After completion of
photoelectric conversion in the light-receiving block, the signals are output to the AP circuit in the reader controller
circuit board in parallel for each channel (total eight channels) of the CCD array.

CCD2.JPG

The contact image sensor (CIS) is used to control analog image processing in the following flow of work:
The light reflected by the original is collected by the rod lens array;
the light is then collected by the CCD array;
the light is converted into an electric signal by the CCD array (photo-conversion) for output.
The CCD array consists of a total of 8 channels (units). Each channel possesses its own output correction table used
to process an input intensity signal for gain correction for output of an image signal

CCD.JPG

[SESHU]

I DON'T UNDERSTAND YOU...WHAT IS "oneside/bothsides upside lightly comes"????
Can you use the common/general technical terms like "Leading edge or Trailing Edge"



Attachment 6615

YES..
I CAN SEE YOUR IMAGE MY PROBLEM IS COMES PERFECTLY REAR SIDE FULLY LIGHTLY.
that's also effected only when making copies....

o.k.
now you can give me solution....

[SESHU]

sorry but is a little difficult to understand your words


When u make the SCAN- to your PC=do u place it on the glass or use the top DF FEEDER

When u make COPIES- and have this quality problem -is it from the GLASS only / or does it also happen when u put paper in the top DF Feeder to copy

no..
when i make scan to computer i placed the paper on the glass.
full of qulaity all sides..

[SESHU]

I went back to your posted images/ now I understand what u are talking about/
What u showing are Three pages of same document

IMAGES ARE ..
First image is a >copy from the 4570

Second image is from >your computer to 4570

Third is a scan >to your computer

Question now is ? where did u place the document when u made a copy ? On the Glass or in the DF Feeder tray ?

Next ?? Where did u Scan the document from ?
On glass or did u use the DF Feeder tray.

i am showing images scan to computer i placed the paper on the glass.
and also i can make copies also paper placed on the glass. i am showing first image copy from the glass.

[SESHU]

I might as well jump in here and take a stab at it...

As I understand the problem, if you make prints from a PC, the density is fine, I assume the same with internal test prints,,, if you make a copy, then you have the light image issue. The problem has nothing to do with the laser or the rest of the print engine. The scanner is where you have the issue. clean the optics and run CCD ADJust under service mode, and the scanner issue should be corrected.

yes .. u have understand my problem correctly mr.fixit..
i make the copies only light images will comes out..
how can i adjust ccd values in service mode.

[SESHU]

sorry but is a little difficult to understand your words


When u make the SCAN- to your PC=do u place it on the glass or use the top DF FEEDER

When u make COPIES- and have this quality problem -is it from the GLASS only / or does it also happen when u put paper in the top DF Feeder to copy

now .. i can make copies checking glass and df feeder also..
those are same problem found..

place the paper on the glass check the image rear side upside lightly .
and also same image will comes out in upper df feeder also upside light image quality...
iam showing first image copy that's have been glass and upper df feeder also.
so now what to do...