Question about Riso RP 3700
My master comes off the roll with a vertical dotted line on it. I have switched out the thermal strip, but that didn't help. I have also cleaned the glass and printed new pages to create a master from. None of these has helped. What can I try?
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Posted on Jan 02, 2017
the thing might be down to an old master stuck to the drum this could cause the faint copies and the missing print.. pull the drum out check under the master.this would also cause the paper to jam on exit. the error is for no master eject check the calmp is free where it grips the master and also the path for the master eject to the waste bin
Posted on Jun 12, 2009
Is this machine interfaced with the computer? if it is.. then it's nothing to do with the machine... Either it's the machine settings.. So you have selected letter size on the machine and ledger on the computer.. Something like this. The machine is probably fine..
Posted on Aug 12, 2009
If rubbing the screen doesn't help, you might have clogged ink passages in the manifold that distributes ink inside the drum. I've seen it happen on RPs that have used off-brand ink or sat for a long time. Inside the drum, the printer is supposed to dispense ink through 4 orifices that are spread across the width of the drum. Sometimes the outer passages get clogged.
Solving it is not simple: you have to basically completely dismantle the drum, remove the clamp plate, the screen, the drum body, the squeegee/doctor roller mechanism and finally the ink manifold and completely flush it out.
I had one like this recently and I had to blow the ink distributor manifold out with compressed air and use paint thinner to get all the clogged ink out of it, and then reassemble and run the inking test mode. If cleaning the screen and print drum cover doesn't help, that's the last option and sometimes it's the only one that works. Some off-brand Riso compatible inks don't flow well and the distribution manifold has small orifices, only about 2.5 millimeters in diameter, so they can clog.
The ink sensor is toward the middle of the drum so it won't necessarily pick up on a failure to squirt ink at the edges.
Posted on May 10, 2011
The solutions on that problem is in the imaging unit like you just have to clean the lens of the camera since tiny dots are dust that is being scnned by the lens during master making process
Posted on May 18, 2013
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