Develop ineo+ 458 color issue error c-2251

[christian8220]

As described, I took the HV board out. Everything behind it seems to be in order. I put the board back and made sure that all the springs were correctly located. I turned on the printer and made a test print. However, I didn’t change anything and the TCR percentage was still 0 for the three-color toner. I used a voltmeter to check the voltage on the four-output pins in the top (white, blue, red and yellow). I got 0,31 volt (VDC) on all outputs. So, for me it seems like the HV board is sending the correct power (see picture)
I took the top cover of the printer to access the toner. I removed the toner and opened the slider. As the picture shows it looks like the developer unit is getting toner from the toner above.
Could it be that three developer units just stopped working after the printer was moved to a new location? I have no clue on how they moved it. Could something stop working if the printer is put on the side?

I just still don’t get it that the black/white works fine. So, I guess it must be something that the three colors have in common?
Thanks for the help so far. Let me know if there is anything I should check that can get me closer to a solution or at least figure out what the problem is.

[Synthohol]

the 3 colors all work as one unit in the transfer belt. the black is independent.
to me thats what seems in common. the transfer belt.
have you replaced the belt yet? sorry if i missed it.

[christian8220]

the 3 colors all work as one unit in the transfer belt. the black is independent.
to me thats what seems in common. the transfer belt.
have you replaced the belt yet? sorry if i missed it.

Thanks for the reply. No, I have not changed the image transfer belt. Should the 3 colors still get voltage? I’ve had the image transfer belt out to clean it. As I understand, the image transfer belt is just a role that applies the toner from the drum units to the paper as I understand. Sorry if I’m getting it wrong, I’m still new with printers. Is there any way that I can test it. As I see it, the 4 drum units have their own contact with the image transfer belt. What part should I look at if I should find the thing that the 3 colors have in common?

[Synthohol]

the level history 1 pic that shows 0 for colors, the start button is blue, hit it. it prints a composite page but gives live readings instead of zeros if i remember?
for shyts and giggles have you tried a trouble reset?
if it cannot print solid halftone 255 pages try a background data reset and stabilize then stabilize and gradations.
if the gradations fail try replacing just 1 color DV unit see if readings change or that color comes back.
that burnished stripe on the belt, that cant help matters especially if it lines up with one of the aidc sensors. really should be replaced.
tried running a toner add cycle? a few times?
ive fixed weird issues before by initializing the machine but you will need movie data and maybe fresh firmware.
wish i was there to help push buttons but i no longer have access to MKM and knowledgebase.

[tsbservice]

Looks like machine won't add colour toners from hopper to dev tanks. I would remove and inspect hopper. If sensors there aren't triggering developer tanks won't receive toner and machine will use all toner in developer unit probably it should and will throw codes before but turning off/on may clear the errors. Check history for load of past codes.

[christian8220]

the level history 1 pic that shows 0 for colors, the start button is blue, hit it. it prints a composite page but gives live readings instead of zeros if i remember?
for shyts and giggles have you tried a trouble reset?
if it cannot print solid halftone 255 pages try a background data reset and stabilize then stabilize and gradations.
if the gradations fail try replacing just 1 color DV unit see if readings change or that color comes back.
that burnished stripe on the belt, that cant help matters especially if it lines up with one of the aidc sensors. really should be replaced.
tried running a toner add cycle? a few times?
ive fixed weird issues before by initializing the machine but you will need movie data and maybe fresh firmware.
wish i was there to help push buttons but i no longer have access to MKM and knowledgebase.

I tried to use the print button in the service menu at Level History 1. It just printed a black page with the marks and stripes. See attached picture (Level History 1)
I did an initialization and got the result after See attached picture (test page). So now it seems like some of the colors are working. So, I guess that’s a step in the right direction. However, it looks bad, so I guess something needs to be cleaned first. I used the cleaning stick however, I didn’t change anything. I took one demo page from another printer to compare it. It still seems like there is an issue with the Cyan as the blue and green looks wrong compared to the correct demo page.

I looked at the volt readings. However they was still at 0 procent after the demo page. Where does the system get the volt readings from?

I will need to change the imange transfer belt. However I would like to make sure that the rest i working fine before I do the investment.

[Synthohol]

run a toner add cycle a few times

[christian8220]

run a toner add cycle a few times

I did it once and I also ran hopper toner filling. Now it looks a lot better. There are still some stripes on the paper. However, blue is blue and not purple as the first demo page. I tried to make 20 copies of the demo page just to test it. It came up with the same error as before C-2551. There is a yellow outline on the paper. The lowest demo page is the newest. See picture

[Synthohol]

nice progress, try a background data, reset and stabilize then run all 9 or 12 gradations.

[christian8220]

nice progress, try a background data, reset and stabilize then run all 9 or 12 gradations.

I did it and ran a 12 gradations test print. I was not able to find a 9 gradation. The result looks pretty good. See attached picture. However, when I ran the half tone test it came up with the same C-2551 error after the first page came out. The first page looked good. It still has stripes on both the gradation and half toner. I guess that is because of the image transfer belt.
I ran the half toner again and now all 4 pages got out before I got the C-2551 error. See picture. So know I just need to find a solution for the C-2551 error and change the image transfer belt

[Synthohol]

C2551: Abnormally low toner density detected cyan TCR sensor

Relevant electrical parts

• Developing unit/C,M,Y• Toner cartridge/C,M,Y• Toner empty sensor/Y (PS34)• Toner empty sensor/M (PS33)• Toner empty sensor/C (PS32)• Toner cartridge motor/Y,M,C (M10)• Toner supply motor/Y (M9)• Toner supply motor/M (M8)• Toner supply motor/C (M7)• Front side board (FRB)• MFP board (MFPB)

great progress from where you started!! bigtime!

[christian8220]

C2551: Abnormally low toner density detected cyan TCR sensor

Relevant electrical parts

• Developing unit/C,M,Y• Toner cartridge/C,M,Y• Toner empty sensor/Y (PS34)• Toner empty sensor/M (PS33)• Toner empty sensor/C (PS32)• Toner cartridge motor/Y,M,C (M10)• Toner supply motor/Y (M9)• Toner supply motor/M (M8)• Toner supply motor/C (M7)• Front side board (FRB)• MFP board (MFPB)

great progress from where you started!! bigtime!

Thank you for the help so far. I will try to look into the problem with the error code later this week and get back with an update

[kingarthur]

C2551: Abnormally low toner density detected cyan TCR sensor

Relevant electrical parts

• Developing unit/C,M,Y• Toner cartridge/C,M,Y• Toner empty sensor/Y (PS34)• Toner empty sensor/M (PS33)• Toner empty sensor/C (PS32)• Toner cartridge motor/Y,M,C (M10)• Toner supply motor/Y (M9)• Toner supply motor/M (M8)• Toner supply motor/C (M7)• Front side board (FRB)• MFP board (MFPB)

great progress from where you started!! bigtime!

One thing it hasn't mentioned, The expansion board. I had a C658, that kept throwing the error code, toner was at 0%, it was printing colour though. But may be worth a look

[Synthohol]

my money is on a bad FSB.

[christian8220]

Sorry for the late update. Yesterday I swapped the FSB to a used board just to test it. However, it didn’t change anything. I have also tried to switch the Cyan chip from the developer unit with the chip from the yellow developer unit. I have also had the toner hopper unit out to clean it. However, there was no issue to see.
I have a bad image transfer belt that has a stripe to it. I have heard that it does a test on it for every print to calibrate. Just to make sure that the stripe on the belt wasn’t the cause. I took the belt of the unit and turned it the other way around. I still get the same C2251 after a few prints.

I still don’t get what sensor that triggers the C2251 error code. As the TCR sensor has been swapped it should be okay. So, as I see it. The only thing left is the developer unit. However, a new Cyan developer is very expensive. As I cannot be sure that is the cause of the issue, it’s a big investment. I will try to see if I can get hold on a used one just to test it. However, this is where I stand now.