Savin (Ricoh) SLP416c Color Laser not transfering all toner


E

Eric Kotz

Hello all,
I picked up a Ricoh SLP-416c Color Laser Printer at a hamfest today for
$30. It works...sort of. Basically, best I can tell, the unit has 4
toner cartridges stacked on on top of each other and a green
photosensitive imaging "ribbon" This in turn transfers each colors'
toner onto a red-brown, "holding" drum, and when all 4 colors are on
this holding drum, the paper passes between this drum and the corona
wire, into the fuser, and out of the printer.
Now...when I got this printer, the fuser oil had spilled inside it.
Luckily, it mostly concentrated in a few places - in particular this red
drum. I've taken apart the printer and cleaned it the best I could and
it seems OK now, but I have one problem (which may or may not have
existed prior to the oil spilling)
About 50% of the toner appears to be sticking to this drum rather than
fusing to the paper. This results in the image being pale and spotty on
the paper (almost looks like the toner cartridges are running out, but
this is not the case) I believe the imaging ribbon is in good condition
as the image "builds up" on this drum solidly.
Can anyone tell me what this drum is? I'm wondering if it still has an
oil residue on it and that is why the toner is sticking to it.
Alternatively, perhaps the HV for the corona wire is not high enough for
some reason? What can this red drum safely be cleaned with?

Thanks,
Eric Kotz
(e-mail address removed)
 
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F

FutureChild

My guess is this printer is similar to the qms magicolor 2.
The problem you have is indeed related to the oil spillage, the qms
magicolor 2 had the same problem.
If you want to repair it decent (I would not advise it) you'd have to
replace the following :
transfer drum (red drum)
transfer roller (black roller just below the corona in the rear door)
opc-belt (photosensitive belt)
drum cleaner (located underneath the top cover between the fuser and
opc-belt)
waste feeder upper (located underneath the drum cleaner)
all 4 toner cartriges.

The problem is that when you've powered up the printer after the oil
spillage the transfer drum came in contact with the transfer roller, drum
cleaner and opc belt transferring the oil to these parts and these parts in
return transferred the oil to other parts they come in contact with.

I have experimented with cleaning these parts in the past but found no
cleaning solvent that realy sattisfied me since transfer never realy got
restored fully.
Best result for the drum was washing it using plain old soap and some warm
water and then lessing it dry for a few days.
as for the transfer roller and drum cleaner there is no way to clean it due
to the type of material being used.
waste feeder, opc-belt and toners can also not be cleaned, if you can't find
oil on them it's safe to let them be. If there is oil stickin to them they
will transfer this back to the transfer drum.

Jeff.
 
E

Eric Kotz

Well, luckily, I don't believe the printer was powered up after the
spillage - I believe the person selling it to me spilled it in
transport, and I took it apart and cleaned it before powering it up.
Based on my observations, the oil only dripped onto the transfer drum
and some plastics in the printer and I have since cleaned all of it out.
As to why the image was not fully transferring from the transfer drum,
there was a removable roller on top of it which I did not seat properly
when reassembling the printer. Putting this in place properly solved
this problem.
Unfortunately, I believe the OPC-Belt is worn out now, as while the
printing is MUCH better (about 95% of what it should be) there are a
couple light spots. Anyone by chance have a spare new (or possibly good
used) OPC belt for this printer they are interested in selling? I
believe it takes the same one as the Ricoh 204 (99.9% sure) and 206 (I
think) units, among others.

Any other thoughts/suggestions before I attempt to replace the OPC belt?

Thanks,
Eric Kotz
(e-mail address removed)
 
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A

Andreas E

Unfortunately, I believe the OPC-Belt is worn out now, as while the
printing is MUCH better (about 95% of what it should be) there are a
couple light spots. Anyone by chance have a spare new (or possibly good
used) OPC belt for this printer they are interested in selling? I
believe it takes the same one as the Ricoh 204 (99.9% sure) and 206 (I
think) units, among others.

Hi

I've sen this chassis before and yes, it´s same as Magicolor2. Light
streaks on output may result from toner dust on a slit-glass plate
located below the toner cassettes. (Laser Scanner is located there)
Take all toners out and check for the (black) plastic glass-holder
that is removeable for cleaning. This procedure is covered in the
manual for QMS Magicolor 2. If the belt is worn out, usually it is
visible some scratches along the surface and small "cracks" in the
greeen opc-layer at the edges. Also check the belt for uniform color,
as lighter patches in surface is a sign of opc-layer wearing out.

/Andreas
 

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