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RAKOTOBE Oliva
12-28-2010, 09:31 AM
With my Bizhub 250, I got an error code C2557.
Can you help me to fix this error

ck1
12-28-2010, 09:33 AM
check you developer lifespan ...

Stirton.M
12-28-2010, 10:14 AM
The code references an abnormal low toner density in the black IU.

Check the toner bottle to ensure that it is feeding toner into the sub hopper unit under the bottle. Sometimes users will insert the bottle incorrectly and not lock it properly in place...the lever on the front of the toner hopper for that bottle is moved down to the left to remove and insert the bottle. When moved to the upper position, it both locks the bottle in place and opens a cover on the bottom of the bottle.

It is possible the toner hopper itself is not functioning as well. Either the motor drive is not working, that is, broken, or there is a problem with the printer control board that it is connected to. This is a rare problem and not very likely.

Also, it is possible the image unit itself is defective...the sensor could be at fault...or its not pushed in correctly to make an electrical connection.

minimerlin
12-28-2010, 12:47 PM
Try searching the forum and you will find the code usually happens if a drum or dev count has been reset without actually replacement. You also have to do the clearance of the counters before closing the rh door.
Always search the forum before asking for assistance, as often the fix has been posted before.

emujo
12-28-2010, 03:33 PM
This code will occur if you relplace the drum unit w/o replacing the developer. Emujo

Hansoon
12-29-2010, 06:50 AM
http://www.copytechnet.com/forums/konica-minolta/30832-c2557-bizhub-250-a.html

and:

http://www.copytechnet.com/forums/konica-minolta/9066-biz-hub-350-acll-code-c2557.html

there are many more when you use the search option.

Hans

Stirton.M
12-29-2010, 08:14 AM
Ooops...disregard my last...I somehow thought the machine was a C250....different beast all together.

fixthecopier
12-29-2010, 10:36 AM
This is another case of all the techs guessing because the poster did not think any extra info was needed, like a meter count and when , if ever the drum was changed. If you are a user, call a tech.

Hansoon
12-29-2010, 11:27 AM
This is another case of all the techs guessing because the poster did not think any extra info was needed, like a meter count and whenFrom an end user or an untrained tech in a 3rd world country this would be understandable and forgivable but you're right FixTheCopier, some of our "professional" colleagues...........:mad:

Hans

NEOTECH
12-29-2010, 12:52 PM
with my bizhub 250, i got an error code c2557.
Can you help me to fix this error

dear u have a problem in your drum/developer unit replaced or developer
replaced only and agin celibrait devloper this is only atdc sansor .

montana
12-29-2010, 02:14 PM
hi..this error code related to the ATDC sensor..may you should make ATDC adjustment in the service mode...or if you replaced the developer with incorrect one..this machine working with dv310 type
i hope this help....happy new year..

fixthecopier
12-29-2010, 10:10 PM
From an end user or an untrained tech in a 3rd world country this would be understandable and forgivable but you're right FixTheCopier, some of our "professional" colleagues...........:mad:

Hans

You are correct. Same people would call a car repair center and say "My car runs bad, what could it be."

stefanv
01-25-2011, 03:27 PM
:mad:Try to set atdc gain under tech rep choice to 120
Do not clear IC or PC life + will cause 2557
Set Mode 418 bit 3 to (0)

kenny@kmfs.co.za
02-01-2011, 09:19 AM
With my Bizhub 250, I got an error code C2557.
Can you help me to fix this error
this code means K TCR sensor error (toner carrier ratio), so the imm.unit has reached its end or the toner is not enough , meaning the ratio between toner and carrier or developer in the imm. unit is not in spec . if toner is stil enough then change imm.unit . you can add toner in service mode and see what it does.

copierdude1
02-02-2011, 04:28 AM
Could be a lot of things. Are you running after market toner? If you reset the I.U. with out an actual replacment, did you check you toner levels first? Is the toner path clogged? (seen it with after market junk)

zaini
10-28-2013, 05:14 PM
this code means K TCR sensor error (toner carrier ratio), so the imm.unit has reached its end or the toner is not enough , meaning the ratio between toner and carrier or developer in the imm. unit is not in spec . if toner is stil enough then change imm.unit . you can add toner in service mode and see what it does.

check your solenoid

Hansoon
10-28-2013, 06:37 PM
check your solenoid

wow....

Hans

copier addict
10-29-2013, 07:01 PM
wow....

Hans

So what if it's almost three years late. It is some good advice. Everyone should check their solenoids once in a while. lol

Hansoon
10-29-2013, 07:55 PM
.

*Going speedy to have an urgent look at his solenoid*

Hans

rahadyan himura
11-14-2013, 10:14 AM
actually, error code c2557 is ATDC sensor failure, this error code appear coz your drum, developer lifespan is over, over toner, or electrical parts is damage.
if your drum or developer lifespan not yet over, just do adjustment to ATDC gain,
press utility/counter, check detail, stop-0-0-stop-0-1 and enter the password (default code is 00000000)
after u go to tech rep mode, select tech.rep.choice, printer, ATDC gain.
adjust the value to higher than original. don't forget check the level history, ATDC current must around 5%to 6%.
in my case, i got some error code c2557 in bh350, but i change everything is still same problem. error code c2557 with ATDC current to 10%!
the problem solve i change 2 solenoid drive hopper unit, solenoid (9J06M20000), solenoid (4040M20000) and i can solve my problem.
i hope this can help u.. ^^,

JustManuals
11-14-2013, 08:15 PM
Actually you're a day late and a buck short. The original post was in 2010.

Salonpixel
03-21-2017, 04:29 PM
I have error c255c before F8. Whats i do?

allan
03-21-2017, 06:01 PM
You mean while running F8?
What did you do and why did you do it?
Meaning did you replace the developer..?

The code means the voltage from the TCR sensor was way out of range. Could be the toner carrier ratio is way out.
Or the sensor, connectors cable or control is faulty.

Salonpixel
03-22-2017, 02:49 AM
Я изменил разработчик на новый для инструкции по эксплуатации. Сначала была ошибка с 2557. Во время f8 произошла ошибка with c255c.
Спасибо за ответ! К сожалению мой плохой English.

allan
03-22-2017, 04:57 AM
Did you clear the life counters and restarted the machine with the side door open?
You must close the door just before you run F8.
If you do not do it that way the machine will give that code C2557.
Go to tech rep choice in service mode then to printer. Find the gain adjustment value.
Normal is between 145 and 155.

Make sure the TCR sensor is plunged in OK and the image unit is sitting properly.
Then do the procedure again.

Salonpixel
03-22-2017, 05:11 AM
Да. С открытой дверью. Перед тем как F8, дверь была закрыта. Теперь еще раз я буду проверять все контакты.
Можете ли вы сказать мне , как проверить моторы в сервисном режиме? Существует подозрение , что тонер не входит в блок проявки.
Here are the values of Level History
https://s8.hostingkartinok.com/uploads/thumbs/2017/03/26bad2a76ca5ce0477eea4d0eea4573b.png (https://hostingkartinok.com/show-image.php?id=26bad2a76ca5ce0477eea4d0eea4573b)

allan
03-22-2017, 05:22 PM
Add spoon by spoon full of tonner and reset life and run F8 until it stops moaning.
Seems like there is to little toner in there.

But before that remove the ATDC sensor and make sure there is no buildup or damage to it.
How does a demo page look like? dark or light?

REGSIS
03-22-2017, 07:24 PM
Clear life counters, turn OFF machine , turn ON after 15s then run F8.

But if you get c255c after running F8 that means that TCR sensor cannot make measurement of developer at all meaning either tcr has something on (clean it) or developer needs to be replaced.

To be on the safe side saying to replace developing unit and developer is the best bet.

allan
03-22-2017, 07:34 PM
It works with solenoids and spring clutches.
No way to check that from service mode.
There is a reed switch in the sub hopper and the magnet actuator can get stuck.
You can strip open the sub-hopper and clean it.

If the solenoids get stuck(damper pads gets old and sticky) it normally adds to much toner.
If the solenoid does not kick in it will not add toner and should ask you to replace the toner bottle.

service_man
03-27-2017, 08:03 AM
Hello,
Go to service manual, and find ATDC Gain, and change the number only for 5 MAX gain. I solved much problem for that way.
Sure, if you have developer in unit, and if you have toner in hooper.
I hope so, that you not change toner manufactured ( etc KATUN, ORIGINAL, CHINA )

Regards

Salonpixel
03-27-2017, 08:34 AM
Thanks for the advice, but I broke the sensor on the development unit = (

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