Sc 553 ( mpc2500)

[sharpmind]

Guys, my friend has MPC 2500 and it keeps showing an error SC 553. He had already changed the thermistors and thermostats in the fusing unit yet the error occurred again.He had also changed the power supply unit but the problem never rectified. He does not know where the problem comes from. It really breaks his head.

Any thoughts about this issue?Please help me....

[teebee1234]

• From the manual, the causes could be as follows

__________________________________________________ ____________________
SC553
Heating (pressure) roller fusing lamp overheat 2 (software error)

• Defective Pressure Roller Thermistor
• Defective PSU

• Defective IOB

• Defective BICU

__________________________________________________ __________________

It cauld also be a bad connection between the fusing unit and main machine, try swapping out the fuser first before replacing any boards.

[ricoco]

Take the SMC report and see if Approximately one minute after the power is turned on, SC553 after SC991 is displayed.
The connector between the fusing unit and the main body was cleaned, but the problem reoccurred.
If so The fusing unit is faulty.
Replace it and you are done.
(It happened to me and only solve it replacing the fusing unit. I tryed to change Thermistors. Power supply,... nothing worked. Then i saw this post on TESSA)

[sharpmind]

Take the SMC report and see if Approximately one minute after the power is turned on, SC553 after SC991 is displayed.
The connector between the fusing unit and the main body was cleaned, but the problem reoccurred.
If so The fusing unit is faulty.
Replace it and you are done.
(It happened to me and only solve it replacing the fusing unit. I tryed to change Thermistors. Power supply,... nothing worked. Then i saw this post on TESSA)

I really appreciate your advice.

Can you tell me exactly what part in the fusing unit assembly is faulty? We are trying to cut the maintenance cost of the machine as the fusing unit is expensive to order.

[jonezy999]

Just cut ya losses and replace the whole thing with a brand new one. I have tried and tried to replace individual parts on these fusers and always had the codes come back. A few more calls to the customer and you wont be saving any money at all, Ya know what time equals.

[ricoco]

Yes, Jonezy999 is right.
It happened to me... tried and tried. Almost made a fuser with part... and no success.
I understand you but Change the all Fusing Unit. In the end it will be less expensive

[Gift]

Just to be shure: I assume you friend does know that he must reset the sc code within the service mode.

[teebee1234]

Just to be shure: I assume you friend does know that he must reset the sc code within the service mode.

That's actually the first question that should have been asked/answered. Sometimes we take it for granted that certain procedures are automatically followed, but every once in awhile it comes back to bite us. Most likely the friend did since it is stated that he replaced components, but true a true troubleshooter would have that on his checklist. Sorta like a pilot doing a preflight, goes through all the steps even it they know it by heart.

[sharpmind]

He knows how to reset the error code but it keeps coming back. He did replace the fusing unit but SC 553 keeps showing after some time. He is really upset because he is working on that problem for more than a week now.

That's actually the first question that should have been asked/answered. Sometimes we take it for granted that certain procedures are automatically followed, but every once in awhile it comes back to bite us. Most likely the friend did since it is stated that he replaced components, but true a true troubleshooter would have that on his checklist. Sorta like a pilot doing a preflight, goes through all the steps even it they know it by heart.

[teebee1234]

I would say the next step is to replace the harness in the main unit.