Lanier LD435C

[Two Medicine]

Problem with light images either print or copy on rear side of all colors. Have replaced drums, developer units, transfer belt assy, transfer roller as it was near PM cycle. Still have same issue. Exchanged laser from another unit thinking beam problem or shutter issue, but results were the same The color mixture is so light that you can't perform registration adjustments and/or color calibrations. Front side to the middle is dynamite. Did panic stop and can see the light image from middle to rear of each drum. Colors more pronounced problem than black, but all have same problem. Machine is level and each dev assy was shaken prior to replacement to make sure developer flowed evenly. Has anyone seen this problem? Thanks Running 11 inch on lead edge. But even noticeable on 8.5 inch lead edge.

[cobiray]

Maybe you could scan some examples. It's a shot in the dark, but have you updated the firmware?

[CableGuy]

Have you tried using another transfer unit?

[paulg]

Fault finding Transfer unit or power packs would be my next step.

[CableGuy]

Generally I find that if you have a fault with the power pack you lose an entire colour, not fading off to an end. Not had the issue you've described here, but may well be worth slapping another transfer unit in there to see what happens. Could be a failure of a bearing or broken housing, or something of the like in the transfer unit. The only other issue I've had with regards to print quality issues are the dev drive clutches, but these don't usually go at the same time. Are you certain that all the colours are at fault? There is a bulletin regarding this fault, unfortunately I don't have it to hand right now.
Cheers

[GhostInTheMachine]

Also make sure the right side door is latching in the back. Had a few problems with those big honking doors.

[Fearless V K]

I know you said you tried another laser unit, but have you just taken the shutter off completely? I would give it a shot just for S&G's.

[Two Medicine]

Yes, we removed the shutter from the original laser unit to make sure the shutter wasn't binding. We also have rechecked the side door and its mounting to make certain it wasn't effecting the copy. I will try to get some time to include scans of the copies and internal prints. Thanks for everyone's input. We have tried another transfer assembly and transfer roller as well. Same problem. We have not updated the firmware, but the hot line doesn't seem to think this is firmware related. They thought shutter motor issue or handing shutter on laser and then laser bad, but neither have panned out.

[pocket aces]

just a thought.... I went to a call for light copies same thing you have half the copy was light for another tech. and found he forgot to put the bushings and E clip back on the back of the drum/ dev.unit that was the problem. easy to not put the bushings back in when you change drum and dev. unit because you need to take them off the old drums....the new ones dont come with the bushings

[teebee1234]

The fact that you stated you did a panic stop and all of the drums were light at the rear would indicate the problem lies somewhere between the laser and the pcu's and before the ITB. Is there any possibility of some kind of frame misalignment/damage.
Otherwise what Pocket aces says will give you those symptoms. Did this problem occur out of the blue for the customer or did it happen after a service call?

[Two Medicine]

Pocket Aces nailed it. Tech had changed drums earlier and did not swap the bushings and keepers. Saw the bushing and keeper in the parts manual, but not available separately. Made 4 bushings by filing down a flat to fit its location. Inside/outside diameter is a standard bushing. Works great now. Changed developer as each color dev unit had overtoned. What a difference in the CQ. Thanks Pocket Aces.

[teebee1234]

Good call Pocket Aces and thanks Two Medicine for following up with the fix.

[pocket aces]

here is the part# for the bushing- AA084000 E clip-07200040E if you order the E clip just order QTY of 1 and you will a bag of 100 ...you can find the part # from the mpc2500-3000 part book they take the same drums and dev. glad to help ..

[cobiray]

Make sure you take those techs out back and beat them with a hose. Geeeeeez!!!!!!!!!!!!!

[KOPYTEK55]

Had a similar problem with 2 LD124c 's and did all the usual stuff ,dev drum bicu transfer etc . Finally did a ACC factory recall and copier memory clear and problem went away . Just a thought for you .