Ir4570 copies upside comes very lighly????

[totoro]

[no improvement /better result.. ????]

what do u mean by that statement

I think that he's trying to say that he did the ccd adjust and had no improvement in the image,

[SESHU]

I think that he's trying to say that he did the ccd adjust and had no improvement in the image,

yes .

i can try so many times.
no image improvement .
what to do.

[teckat]

yes .

i can try so many times.
no image improvement .
what to do.

get a manual & read about the copy process for this model, make a check list & try a process of elimination image quality procedure to get a better understanding.

or Rip out the CIS - Contact Image Sensor- swap or replace report back

Can't think of anything else-

[SESHU]

get a manual & read about the copy process for this model, make a check list & try a process of elimination image quality procedure to get a better understanding.

or Rip out the CIS - Contact Image Sensor- swap or replace report back

Can't think of anything else-

i see in the manual before when i thread not started first.
but there is no copy process data.
there is copy paper feeding like goes see full in there.
i think laser assy focusing problem???

[SESHU]

incase computer to print also upside light???
So what's the problem???

[teckat]

incase computer to print also upside light???
So what's the problem???

you are now saying -when u print from the PC to 4570 u have light edges ????

Are u a trained Tech ??? /

THIS IS ALL THE INFORMATION IN A NUTSHELL/ OTHER THAN SENDING ME A TICKET TO INDIA,

GOOD LUCK>>>>>>>>>

Original exposure by LED array, indirect (LED + photo-conducting body)
Original scan in book mode: scan by moving contact image sensor (CIS)
in ADF mode: by original stream reading with contact image
sensor (CIS) fixed in position


Contact Image Sensor (CIS)
LED= serves as the source of light used to expose the original.
Light= guide directs the light from LEDs to the entire length of a single
image line of the original.
Rod lens array= collects light reflected by the original.
CCD array=collects the reflected light coming through the rod lens
array.

Analog Control Inside the Contact Image Sensor
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.

if discrepancy occurs in the output of image density among channels;
or if the setting of CCD-LUT is other than '0
in >Service Mode>
for CIS unit gain correction data-COPIER>OPTION>BODY>CCD-LUT

for CCD gain correction-COPIER>FUNCTION>CCD>LUT-ADJ2
(using the D-10 Chart)

Shading Correction
machine executes this correction for every scan made in main shading unit. It measures the density of the
standard white plate, and compares the result against the target value stored in the shading correction circuit; the
difference between the two will be held as the shading correction value for use in correcting variation among CCD
pixels when scanning the original, thus evening out the density levels of the image.

Image Formation Process
[1]Pre-exposure-removes residual charges from the drum.
[2]Primary charging- charges the surface of the photosensitive drum to a
uniform negative potential.=Primary charging roller
[3]Laser exposure- forms a latent static image on the drum.
[4]Development -forms a visible image on the drum.
[5]Transfer -transfers images from the drum to paper.=Transfer roller
[6]Separation- separates paper from the drum.
[7]Drum cleaning- removes toner from the drum.

Transfer Roller Bias Control
machine changes the output depending on the site environment (absolute moisture content), paper type, paper
width, and source of paper.

Uneven Density Caused by Irregular Rotation of the Main Motor
Uneven density at specific intervals tends to occur in sub scanning direction (from leading edge to trailing edge in
relation to paper movement) when the main motor starts to rotate irregularly.
To facilitate a check, use a halftone test pattern.
<Remedy>
Replace the main motor.


Reader Unit
- Check the scanner unit (contact sensor, white plate, copyboard glass) for scratches, dirt, and foreign matter.
- Check the contact sensor unit to see if it moves smoothly and if it is free of dirt.
- Check to see if the contact sensor is free of flickering.
- Check to see that the scanner system is free of condensation.
Process Components
- Check to see that the drum unit and the developing unit are properly fitted.
- Check to see that the photosensitive drum is free of scratches and dirt.
Transfer Components
- Check to see that the transfer roller is free of wear, scratches, dirt, and deformation.
Fixing Assembly
- Check to see if the fixing film and the pressure roller are free of wear, scratches, dirt, and deformation.
- Check to see that the fixing thermistor is free of an open circuit.
- Check to see if the thermal switch is free of disruption in its electrical continuity.

Service Mode>>>>
- Check to see that the various adjustment settings of the CCD are as indicated on the service label.
(COPIER>ADJUST>CCD>all items)
- Check to see if registration adjustment is executed.
(COPIER>ADJUST>FEED>ADJ>REGIST)
- Check to see if the image read start position adjustment is correct.
(COPIER>ADJUST>ADJ-XY>ADJ-X/ADJ-Y)
- Check to see if the setting of ADJUST/

Check for>>
condensation on the BD sensor
condensation on the dust-proof glass
condensation on the contact sensor of the reader unit or on the copyboard glass

[andym]

Clean the CIS. Clean the underside of the copyboard glass. Use only genuine Canon toner.

[teckat]

Clean the CIS. Clean the underside of the copyboard glass. Use only genuine Canon toner.

good thought> but too late/ that advise was given many moons ago

[SESHU]

you are now saying -when u print from the PC to 4570 u have light edges ????

Are u a trained Tech ??? /

THIS IS ALL THE INFORMATION IN A NUTSHELL/ OTHER THAN SENDING ME A TICKET TO INDIA,

GOOD LUCK>>>>>>>>>

Original exposure by LED array, indirect (LED + photo-conducting body)
Original scan in book mode: scan by moving contact image sensor (CIS)
in ADF mode: by original stream reading with contact image
sensor (CIS) fixed in position


Contact Image Sensor (CIS)
LED= serves as the source of light used to expose the original.
Light= guide directs the light from LEDs to the entire length of a single
image line of the original.
Rod lens array= collects light reflected by the original.
CCD array=collects the reflected light coming through the rod lens
array.

Analog Control Inside the Contact Image Sensor
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.

if discrepancy occurs in the output of image density among channels;
or if the setting of CCD-LUT is other than '0
in >Service Mode>
for CIS unit gain correction data-COPIER>OPTION>BODY>CCD-LUT

for CCD gain correction-COPIER>FUNCTION>CCD>LUT-ADJ2
(using the D-10 Chart)

Shading Correction
machine executes this correction for every scan made in main shading unit. It measures the density of the
standard white plate, and compares the result against the target value stored in the shading correction circuit; the
difference between the two will be held as the shading correction value for use in correcting variation among CCD
pixels when scanning the original, thus evening out the density levels of the image.

Image Formation Process
[1]Pre-exposure-removes residual charges from the drum.
[2]Primary charging- charges the surface of the photosensitive drum to a
uniform negative potential.=Primary charging roller
[3]Laser exposure- forms a latent static image on the drum.
[4]Development -forms a visible image on the drum.
[5]Transfer -transfers images from the drum to paper.=Transfer roller
[6]Separation- separates paper from the drum.
[7]Drum cleaning- removes toner from the drum.

Transfer Roller Bias Control
machine changes the output depending on the site environment (absolute moisture content), paper type, paper
width, and source of paper.

Uneven Density Caused by Irregular Rotation of the Main Motor
Uneven density at specific intervals tends to occur in sub scanning direction (from leading edge to trailing edge in
relation to paper movement) when the main motor starts to rotate irregularly.
To facilitate a check, use a halftone test pattern.
<Remedy>
Replace the main motor.


Reader Unit
- Check the scanner unit (contact sensor, white plate, copyboard glass) for scratches, dirt, and foreign matter.
- Check the contact sensor unit to see if it moves smoothly and if it is free of dirt.
- Check to see if the contact sensor is free of flickering.
- Check to see that the scanner system is free of condensation.
Process Components
- Check to see that the drum unit and the developing unit are properly fitted.
- Check to see that the photosensitive drum is free of scratches and dirt.
Transfer Components
- Check to see that the transfer roller is free of wear, scratches, dirt, and deformation.
Fixing Assembly
- Check to see if the fixing film and the pressure roller are free of wear, scratches, dirt, and deformation.
- Check to see that the fixing thermistor is free of an open circuit.
- Check to see if the thermal switch is free of disruption in its electrical continuity.

Service Mode>>>>
- Check to see that the various adjustment settings of the CCD are as indicated on the service label.
(COPIER>ADJUST>CCD>all items)
- Check to see if registration adjustment is executed.
(COPIER>ADJUST>FEED>ADJ>REGIST)
- Check to see if the image read start position adjustment is correct.
(COPIER>ADJUST>ADJ-XY>ADJ-X/ADJ-Y)
- Check to see if the setting of ADJUST/

Check for>>
condensation on the BD sensor
condensation on the dust-proof glass
condensation on the contact sensor of the reader unit or on the copyboard glass

thank you teckat.

i can try to set anything else.
above the shading correction of image.
please.....

[teckat]

Check your standard white plate****

Shading correction shading correction: executed for each job
shading adjustment: executed at power-on

The machine uses the reader controller PCB to process images for every single image line; specific functions are as
follows:
1) Analog Image Processing
-CCD drive
-CCD output gain correction, offset correction
-CCD output A/D conversion
2) Digital Image Processing
-shading correction

Shading Correction 0006-5938
iR2270 / iR2870 / iR3570 / iR4570
The machine executes this correction for every scan made in main shading unit. It measures the density of the
standard white plate, and compares the result against the target value stored in the shading correction circuit; the
difference between the two will be held as the shading correction value for use in correcting variation among CCD
pixels when scanning the original, thus evening out the density levels of the image.


COPIER > FUNCTION > CCD
CCD-ADJ
Automatically adjusting CCD
1<Operating procedure>

1) Place about 10 or more sheets of standard white paper (whitest paper
used by the user, excluding color print paper) on the document table.
2) Select <CCD-ADJ> to reverse its display. Then press the OK key.
3) Adjustment is executed automatically (about 15 seconds). During
adjustment, <ACTIVE> is displayed at the upper right of the screen.
4) The LED lamp (for document lighting) lights twice and the automatic
adjustment ends with <OK> displayed on the screen.
5) Since all items are updated in this service mode
(COPIER>ADJUST>CCD), enter the values into the service lab.

DFWLVL1/2
Adjusting the ADF white level (Platen scan/Flow read scan)
<Operating procedure>
1) Place the user's usual paper on the document table and execute
COPIER>FUNCTION>CCD>DF-WLVL1: Read the white level in
Book mode (to check the transparency of the glass for Book mode).
2) Load the user's usual paper on DF and execute
COPIER>FUNCTION>CCD>DF-WLVL2: Read the white level in DF
(flow read) mode (to check the transparency of the glass for flow read).
(Reading both sides of the chart)
Front side read: Calculating DFTAR-R
Back side read: Calculating DFTAR2-R
Note: Both items shall be executed simultaneously.

COPIER > FUNCTION > DENS
WHITE-ME
Automatically correcting the white level
1<Operating procedure>

1) Place about 10 or more sheets of standard white paper (the user's usual
paper) on the document table.
2) Select <WHITE-ME> to reverse the display. Then press the OK key.
3) The document lighting lamp scans once and the operation terminates.

PD-DENS
Outputting a print pattern for automatic density adjustment in Character
mode
Note: Since binarizing is supported by the PD method in Character mode,
execute this mode to adjust the density automatically.
<Operating procedure>
1) Select <PD-DENS> to reverse its display. Then press the OK key.
2) Paper is fed from Cassette 2 and a 17-tone print pattern is output.

PD-ME
Automatically adjusting the density in Character mode (Reading PD-DENS
output pattern)
<Operating procedure>
1) Set the PD-DENS output pattern on the document table by noting the
following:
- Face the print side down.
- Orient the white (light) side of the 17-tone chart toward the vertical size
plate.
- Align the output pattern with the index inside left of the document table.
2) Select <PD-ME> to reverse its display. Then press the OK key.
3) The document lighting lamp is turned ON and OFF for 13 automatic
scans.

DGAMM
Controlling photo-conductor drum resistance measurement (APVC)
Note: Execute this mode only in the following cases and skip it when
unnecessary.
- Adjustment if the drum unit has been replaced
- Fault isolation if automatic copy density adjustment (PD-ME) has
ended abnormally
- Reference for checking the drum endurance
<Operating procedure>
1) Select an item and press the OK key.
2) Automatic control terminates after outputting one blank copy.
3) Select DISPLAY>HV-STS>PRIMARY to display the
measurement results.

COPIER>TEST>PG
TYPE>
Enter a test print type number and press the Start key for test printing.
(After test printing, be sure to return the number to 0.)
0: Image from CCD (Ordinary print)
1: Checker
2: 17 tones (Error diffusion method [T0BIC])
3: 17 tones (Dither screen method)
4: Totally white 00H
5: Halftone 80H (Error diffusion method [T0BIC])
6: Halftone 80H (Dither screen method)
7: Totally black FFH
8: Horizontal line (space: 27 dots, line width: 40 dots)
9: Horizontal line (space: 50 dots, line width: 60 dots)
10: Horizontal line (space: 3 dots, line width: 2 dots)
11: Halftone 60H (Error diffusion method [T0BIC])
12: Halftone 60H (Dither screen method)
13: Halftone 30H (Error diffusion method [T0BIC])
14: Halftone 30H (Dither screen method)
15 - 20: For development

PG-PICK
Selecting an output stage for test printing
1: Cassette 1
2: Cassette 2
3: Cassette 3
4: Cassette 4
5: Side deck
6: Manual feed
7 - 8: Not used

***My friend there is nothing left to say, if all these checks and previous checks fail, u need a professional Tech to visit- inspect & Repair it.
case-closed-stamp.JPG

[andym]

good thought> but too late/ that advise was given many moons ago

... and it's still got light copies?

Ok. At the risk of repeating more good advise. Has anyone thought that the IR**70 b&w range leak toner. The seal around the toner hopper is crap and if using compatible toner you can find more on the laser unit than in the dev. Make sure the laser unit is cleaned out. Make sure the hopper is sealed correctly. There is a bulletin for it somewhere.

[SESHU]

... And it's still got light copies?

Ok. At the risk of repeating more good advise. Has anyone thought that the ir**70 b&w range leak toner. The seal around the toner hopper is crap and if using compatible toner you can find more on the laser unit than in the dev. Make sure the laser unit is cleaned out. Make sure the hopper is sealed correctly. There is a bulletin for it somewhere.

thank you for advice.

I can try to check laser assy..
Thank you

[teckat]

... and it's still got light copies?

Ok. At the risk of repeating more good advise. Has anyone thought that the IR**70 b&w range leak toner. The seal around the toner hopper is crap and if using compatible toner you can find more on the laser unit than in the dev. Make sure the laser unit is cleaned out. Make sure the hopper is sealed correctly. There is a bulletin for it somewhere.

the original poster for this issue has been given six pages of information to observe and investigate, and for procedures to follow>

Troubleshooting an issue is all about procedure, taking notes, elimination, trial & error - if you don't follow them, you become lost- and end up trying to shotgun the issue, that results in lost time,& frustration on both parties
(the Tech & The Customer, and sometimes your Manager.

[badboys]

incase computer to print also upside light???
So what's the problem???

Ahhh...???, I thought you say print from PC was OK??? Have you done the laser test print I mention earlier??? Service Mode>Copier>Test>Type 1 - 8. What kind of print do you get??? "one side/upside light" or full of quality image???

[badboys]

yes ..
only effected copies.

PLEASE CONFIRM..!!! Copy OR Print?? OR both??