Ir4570 copies upside comes very lighly????

**badboys** · 10-19-2010, 04:53 PM

Originally posted by SESHU

thank you for advice.

I can try to check laser assy..
Thank you

...seems like you are not taking some advice here. Aren't you suppose check on Laser Assy 5 days ago??? Teckat even show you where the slit glass is...

and those information/advise by some members are standard troubleshooting procedures which you should have had done as a tech before posting.

**SESHU** · 10-19-2010, 04:56 PM

Originally posted by badboys

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

copy effected high..100%
print also effected but medium light. 50%

it means copy image upside light clerly we have seen it.
print also up side light .it will effected also. but those are not same.
upside light its some light.

**badboys** · 10-19-2010, 05:06 PM

Originally posted by badboys

You said,"laser dust glass clean with smooth cotton"? Have you try replacing the whole Laser Assy? Not getting the original copy to lay down flat will give you dark/shadow edges due to being exposed. This is one weird problem you have I must say...

Have you done the laser test print???

Have you replace the Laser Assy..??? Its the easiest laser assy to be remove compared to the older models. Just 3 connectors & 1 screw locking down the whole laser assy. There's no previous post by you saying that you have done so give it a shot & post back the result.

**badboys** · 10-19-2010, 05:20 PM

Originally posted by badboys

After analyzing/considering your issue here, it is possible that the problem probably lies with the "Image Processing Module" which actually took place in the Main Controller PCB. Refer to service manual "Chapter 4.5.1 Overview of Image Flow". Observe the different of Image Data flow for Copy Function, Scan Function & Print/PDL Function. Go through it & you'll understand what I mean.....Enjoy Your Read

Have you read this Chapter?

**SESHU** · 10-19-2010, 05:22 PM

Originally posted by badboys

Have you replace the Laser Assy..??? Its the easiest laser assy to be remove compared to the older models. Just 3 connectors & 1 screw locking down the whole laser assy. There's no previous post by you saying that you have done so give it a shot & post back the result.

here not available new laser assyes.
old laser assys avalable but once taken cannot taken back.
o.k . my laser assy changed to another 4570. it will perfect copy.
and i have do laser test print .printed that's also upside some light print.not high. it will diffrence clearly i see up and down.
and
i have remove laser assy 5 days back. slit glass perfect fitting. and glass edges also full cleaned.after i begin laser assy i can check again same result.
nothing is there no any dust.

**badboys** · 10-19-2010, 05:43 PM

"Flow of Image Data"
1.Copy mode: Original document>Reader Unit>Main Cont>DC Cont>Engine>Result
2.Send Mode: Original document>Reader Unit>Main Cont>Ethernet>PC(desktop/laptop)
3.Print Mode: PC/PDL>Ethernet>Main Cont>DC Cont>Engine>Result

**totoro** · 10-20-2010, 02:53 AM

If you are getting light image on upside( top of page ?) in both copy and print; have you checked to see of the image on the drum is light also? If image on drum is fine then you have a transfer problem. If image on drum is light then you have a charge or laser problem. Please follow standard copy quality troubleshooting. It would also help if you had a translator help you with your English as you are not using any of the standard terminology that we can understand.

**SESHU** · 10-22-2010, 05:10 PM

Originally posted by totoro

if you are getting light image on upside( top of page ?) in both copy and print; have you checked to see of the image on the drum is light also? If image on drum is fine then you have a transfer problem. If image on drum is light then you have a charge or laser problem. Please follow standard copy quality troubleshooting. It would also help if you had a translator help you with your english as you are not using any of the standard terminology that we can understand.

i can do again replace.

New drum and charge roller.
But problem still is there.
No more improvement of my image.

**android790** · 10-22-2010, 08:03 PM

You should relook at what teckat and others posted. Your answer is there. I have been following these people for a while, and I have found that 1) you misunderstood what they were saying. Or 2) it can not be fixed alone. So please take all of there information and start your repair over. You should make notes of what has been said, and write your plan on paper first. I hope I am wrong and someone has a 3).

**SESHU** · 10-29-2010, 01:29 PM