[CQ] Ricoh C2050 light color lines(with attachment)

[Guest]

We're making color copies on this machine. The issue is that there are light color lines going through the image and fading out. These lines go from lead to trail and only happen when making copies, all prints have good cq.

We've replaced all 4 drum units,cleaned optics, checked the lens block and cleaned the scan lens. Cleaned off shield glasses with the 'toothbrush'. Tried lifting up on the bottom left hand side of the machine frame to check to make sure it wasn't bent down.

all the best

[tcs04]

We're making color copies on this machine. The issue is that there are light color lines going through the image and fading out. These lines go from lead to trail and only happen when making copies, all prints have good cq.

We've replaced all 4 drum units,cleaned optics, checked the lens block and cleaned the scan lens. Cleaned off shield glasses with the 'toothbrush'. Tried lifting up on the bottom left hand side of the machine frame to check to make sure it wasn't bent down.

all the best

Stick an A3 original on the glass, select auto reduce / enlarge (Tray1) take a copy.

are the lines now across the paper feed direction? If yes the fault IS the scanner.

The optics must be VERY clean. Has anyone out there had the CCD problem (similar to AF1224) with these models? Sounds similar...

[Nortenio]

Ok great suggestion. So I think what you're going the right direction tsc04. Instead of an A3 I put 2 sheets of 8.5x11 on the glass side by side. Now, instead of the lines going in the paper feed direction they go the other direction; that is, um, whatchamacallit? not lead to trail but front to back.

so how do I explain this to a senior service tech who doesn't have a clue why we have to replace optics to fix this?

[tcs04]

Ok great suggestion. So I think what you're going the right direction tsc04. Instead of an A3 I put 2 sheets of 8.5x11 on the glass side by side. Now, instead of the lines going in the paper feed direction they go the other direction; that is, um, whatchamacallit? not lead to trail but front to back.

so how do I explain this to a senior service tech who doesn't have a clue why we have to replace optics to fix this?

Right... You have lines generated by the optics / scanner in the "sub scan" direction, (See below), these are then being rotated / reduced onto the 8.5 x 11 paper from tray 1, or staying in the original (Paper feed / sub scan) direction if not rotated by the image processing, BEFORE reaching the laser / polygon mirror.

(NOTE "Scan" relates to the laser, which scans from the front to the back of the machine, so "Sub scan" is in the direction of scanner movement (Left to right) and "Main (Laser) scan" is from the front edge to the rear edge of the platen glass.)

I hope this make the process clear.

P.S.

Just looked at the samples (!). Those ACC charts look a bit "off" for a machine with new drum units, but that's for later! The photo looks like dirty optics, check the silver reflective strip next to the lamp, these can give odd effects if dirty / bent. Turn the original 180 degrees. if the lines stay on the same picture is's the original, unlikely, but you have to try it!

Try the SBU test pattern SP 4-807-001. this will help confirm the fault is optical

[TonerMunkeh]

You sure those lines aren't caused by a rippled fusing belt? They look a bit too random to be optics. Could also be the ITB cleaning unit blade is skipping.

[tcs04]

You sure those lines aren't caused by a rippled fusing belt? They look a bit too random to be optics. Could also be the ITB cleaning unit blade is skipping.

We believe they rotate in "auto reduce enlarge" mode. If so, must be scanner related.

[TonerMunkeh]

That's bloody peculiar. Looking forward to seeing the result on this one!

[Comatose]

You can get wierd lines from the scanner unit caused by customers leaning on the left hand side of the control panel (the corner that has no support under it. On colour machine mainly it can show as light lines or random clour lines. Had this on a few machines and if that is the problem its fecking hard to get rid of.
There are adjustments you can make to the scanner in that corner (remove left scanner side cover and a screw with adjustment marks is there) but if the frame is bent just a small amout it is almost impossible to get it back again.

Looking at the lines you are getting I would suggest checking all the optics again, also see if you get the same lines from the ADF and Platten. Just a small spec on the mirrors can cause issues.

[florintoni]

We're making color copies on this machine. The issue is that there are light color lines going through the image and fading out. These lines go from lead to trail and only happen when making copies, all prints have good cq.

We've replaced all 4 drum units,cleaned optics, checked the lens block and cleaned the scan lens. Cleaned off shield glasses with the 'toothbrush'. Tried lifting up on the bottom left hand side of the machine frame to check to make sure it wasn't bent down.

all the best

Be very sure that printing is ok. Make a lot of. In this way you'll isolate the issue at the scanner. Clean the optics very well, including the metal parts around the lamp. Check if the scanner movement is smooth. Move it by hand too, from one end to the other to check this. Clean any dirt you see on his rail. Make some copies on the Adf to see if the problem remain. Make copies on the platen glass but cover your original A4 with some A3 sheets to avoid any light beam get into. The ADF might be skew or uneven closed. Do the ACC for printer too. How do they look like. Your ACC for copier looks a bit tired for new IU.
waiting for new details

[florintoni]

We're making color copies on this machine. The issue is that there are light color lines going through the image and fading out. These lines go from lead to trail and only happen when making copies, all prints have good cq.

We've replaced all 4 drum units,cleaned optics, checked the lens block and cleaned the scan lens. Cleaned off shield glasses with the 'toothbrush'. Tried lifting up on the bottom left hand side of the machine frame to check to make sure it wasn't bent down.

all the best

Nortenio, i forgot to tell you something. You said prints are ok but keep count that your ACC test is printed but it's looking bad

[tcs04]

Nortenio, i forgot to tell you something. You said prints are ok but keep count that your ACC test is printed but it's looking bad

I covered all this earlier!!

[Nortenio]

your responses will be sure to help. I got my service manager to work on it for a bit. he's gonna order a new itb cleaning unit(transfer belt cleaning unit). He says he thinks it's still an optics issue. I'll keep you posted on what the deal is with this crazy toner nuker.

[florintoni]

Stick an A3 original on the glass, select auto reduce / enlarge (Tray1) take a copy.

are the lines now across the paper feed direction? If yes the fault IS the scanner.

The optics must be VERY clean. Has anyone out there had the CCD problem (similar to AF1224) with these models? Sounds similar...

You were right about1224c and 2232c. They are diferent. I've mistake these fucking figures that always puzzle me, especially as i am used with Nashua models.
Also, i noticed you mentioned something about CCD problem like on 1224c model. Few years ago i've replaced 3 CCD on 3 copiers 1224c for they give me a terrible headache. On my copies what it had to be white was yellow. After that clients invited me to a "party". What is the problem you encountered on this model and how often. Begin to worry about.

thanks

[jonezy999]

Im curious now and going to clear this in my mind. Are the ACC copies of the original? They must be if we are going to rule in optics. Please confirm this.

Also, you should use a Ricoh test chart, they are designed to pinpoint these types of problems. Maybe post some better samples, ie test chart and an ACC original and its copy would help us all a bit more.

[tcs04]

It IS a scanner / optics problem!!