Canon iR2200 w/Black Copies

[SBBluewater]

Hi All,
Have a customer with an iR2200 putting out completely black copies. Was working fine and then went black. Scanning lamp is working. Any ideas of what to check?
Thanks

[logonjim]

black copies

is there any image at all on the copy? can you do test prints?

[SBBluewater]

Black Copies

You can actually make two or three copies and they come out okay. After the third copy they all start getting a foggy background and a wavy pattern. They also start getting darker and darker so by the tenth copy or so you can still still the image but the copies are not presentable. I thought maybe it might be a laser power problem. I have not seen anything like this before. Any ideas?

[Copier_Guy]

It actually sounds like an exposure lamp problem. It may be degrading as you run more copies. As Loginjim was asking you, does the machine make machine generated test prints ok? That will point out the optics if the machine generated test prints come out ok. Try running P-Prnt a few times and see if you have any degrading in that mode.

[blackcat4866]

Copier Guy is right. Probably the exposure lamp or lamp inverter causing the problem. The ultimate test is the internal prints. If the internal prints come out OK its definitely optical.

If the internal prints are affected look at primary charge loss.

[Irish]

Hi Is paper damp.. It may be evaporating from fuser and misting something in optical path .. More common on machines with scanner home position over fuser..

[logonjim]

black copies ir 2200

Hi guys is unlikely to be the exposure lamp as first few copies ok rem it only scans once so id be looking at first of all do a dc clear and re input values less its corrupted ,the dev unit, and drum ,then the hv power supply pcb ,

[Copier_Guy]

Hi guys is unlikely to be the exposure lamp as first few copies ok rem it only scans once so id be looking at first of all do a dc clear and re input values less its corrupted ,the dev unit, and drum ,then the hv power supply pcb ,

Correct, I forgot that little detail. There goes that theory.

[blackcat4866]

Primary charge loss.

Check for primary charge loss. Either the charge roller, contacts, or HVT.

You know, sometimes a shorted separation static eliminator can kill all the voltages from an HVT.

[Canuck]

Check all High voltage contacts...dev bias,primary charging roll especially.....when you say it gets darker after more copies,is this multiple copies of 1 original or different originals? 1 original,not exposure...more than 1 then exposure possibly...make sure ccd is grounded properly(not from factory...they using a stand-off...put in a screw)

[SBBluewater]

Black Copies

Hi All,
Thanks for the replies. The internal test prints come out okay. When we make multiple copies of the same original the first 5 are okay. After that they slowly start to get backgrounding and the image eventually turns black. By the 50th copy you can no longer see the image and the copies are coming out Black. Canon seems to think it is the High Voltage Power supply that is going bad.

[blackcat4866]

This is consistent with a bad HVT.

[tecnimatiz]

Try A New Drum