Ricoh MP C4500

[iscott]

Solid Dropouts
I have a customer that prints alot of flyers with solid backgraounds some of the solids
have dropouts in them happens with color and B&W is it the drum or transfer belt or something else
Thanks.

[E Winter]

sample scan?

did you try using color copy paper? The solids may look a bit cloudy if the paper is too rough

[iscott]

4500 2.jpg

The spot I'm refuring to is in the bottom lefthand corner

[Herrmann]

hmmm... looks like cheap and in addition moist paper to me...

are you feeding LEF or SEF ?

[E Winter]

All in all this does look more like a paper issue to me - maybe low quality paper or a moisture problem. I'd probably try a test run on fresh color copy paper.


The black looks a bit week around "mr coffin" compared to the area around "list price.." - I guess it's a half tone?

I think you should try printing a set of test patterns with 100%, 50% and 25% coverage in A3/Tabloid size - one set per process color (C,M,Y,BK). Guess it would be interesting to know if these spots are appearing randomly or in a specific pattern/distance. You can also take a look if the spots does always have the same shape. And the 100% patterns should look quite solid on color copy paper and acceptable (slightly cloudy) on normal paper - sometimes the MPC can tend to rund with too little toner in the dev-mix over the time.

[Cipher]

The fusing unit on this model can cause some weird and wonderful print quality issues.
A working but worn fusing unit can cause the following symptoms.

• Patchy solids
• Blurring / smudging
• Buckle marks (more noticeable on A3) / flat spotted heat roller (moving the entrance guide back helps).

It's also important that the paper thickness is setup correctly.

• Thin paper: (52-59 g/m2)
• Plain Paper (60-81g/m2, 16-22lb.)
• Middle Thick (82-105g/m2, 22-28lb.)
• Thick Paper 1 (106-169g/m2, 28.5-44.9lb.)
• Thick Paper 2 (170-219g/m2, 45-58lb.)
• Thick Paper 3 (220-253g/m2, 58.5-67lb.)