Problem MPC4503 in papel SRA3 to 250gms

[TonerMunkeh]

Re: Problem MPC4503 in papel SRA3 to 250gms

I've run into this before. It's shock jitter between the PTR and the fusing unit. Unfortunately, there is nothing that can be done about it, it is a known limitation of this model.

[UNICORNico]

Re: Problem MPC4503 in papel SRA3 to 250gms

I would try a new Magenta PCU and development unit. Problem is that chances are the Yellow will need replacing soon also.

How many prints on the machine? And what are the PM counters on for the PCU's and Development units?

Sent from my WAS-LX1 using Tapatalk

I appreciate the answer, buddy.


But the Black Developer Unit and Developer Cyan, have already been changed as indicated at the beginning of the post, and this did not solve the problem as you can see.


I'm afraid that even if you changed all the full image units (Drum Unit + Developer Unit) this defect would not be fixed. In the images I left of sample are based on these tests with the Cyan Color, and the defect remains.
From our Ricoh Technical Support department in Spain to distributors, they still do not provide us with solutions and refer us to parts that have already been changed, such as the Transfer Unit.

[8T2]

Re: Problem MPC4503 in papel SRA3 to 250gms

I would try a new Magenta PCU and development unit. Problem is that chances are the Yellow will need replacing soon also.

How many prints on the machine? And what are the PM counters on for the PCU's and Development units?

Sent from my WAS-LX1 using Tapatalk

[UNICORNico]

Dear Technical Colleagues:


The defect is generated (although in my opinion it is how it is best detected) from works done in 250g "A3 Plus" (SRA3) format. At the end of the writing I will provide images of the defect, in some it is marked. Unfortunately since the "Ricoh Technical Assistance in Spain" do not know how to give us any viable solution to this defect.


Different printing tests have been carried out, starting from the options that the specific drivers (PCL 6 for updated MP C4503 model, from the RICOH website), such as "Thick Paper 3" and "Thick Paper 4", selecting maximum pixel quality "4800 x 1200 DPI", to favor favor favor a slower pace through the device. The defect is only appreciated as a decrease in single print if the device has an "x" period of inactivity in use, but null in multiple printing (more than 1 print) the defect became more visible, and this rule was not always met.


Despite the tests carried out, it was detected that the defect was not only in blue tones but in the rest of the colors.


The defect has symmetry in all tests performed, despite variations in the composition of the image or file used for them, either in "bypass" or in the relevant drawer with the pre-configured configuration, for said type of paper.
All detailed configurations are required by specific work requirements that the customer requires, since with "conventional" weight paper (80g) with different sizes (A4, A3 and A3+) this defect is not presented. Except when performing the "Printer Mode" test pattern from "SP Mode".

SUBSTITUTED PARTS:
-CIAN Drum Unit
-CIAN Reveal Unit
-Black Reveal Unit
-Fusion Unit (Fuser Fixin Film)
-Transfer Unit (Full)
-Laser unit (including polygonal motor)

EXTERNAL SETTINGS:
-Surge in the springs of the fusion system
-Lowering the tension of the springs of the fusion system
-Color calibration parameters settings

https://drive.google . com/drive/folders/1oVhQZJvS76nMKIx_S3Bb1_cU6p2Blh5y?usp=sharing


We appreciate any help or possibility to rule out this problem since by different inquiries, it seems to be a degenerative problem in this model, and as the age is increasing.
A cordial greeting.