[Error Code] MPC2500 sc551 sc553

[Tuga]

HI

I have several MPC2500 with sc551 and sc553, since replacing the termistores, fuse thermico and fusing belt.
work well but a few days back to give errors.

can help?

Thank you.

[laitang]

Re: MPC2500 sc551 sc553

HI.... since replacing the termistores,....

Which thermistor? pressure or heating roller?
Check thermistor position, power voltage?

[Iowatech]

Re: MPC2500 sc551 sc553

Well, I'd really like a bit more information before I give instructions, but I'll take a guess:
Check the quality of the power being supplied by the outlet the machine is plugged into. If you have a meter that can handle the outlet voltage monitor it that way for a little while. If you can get your hands on an appropriate line monitoring device that you can leave at the machine's location for a couple of days, that would be even more useful. The voltage should change by 10% or less.
Spikes, surges and dropouts in the voltage supplied by the outlet can cause all manner of undesired operation from the machine, including error codes related to the fusing unit. Some common causes of that here are energetic storms, nearby construction that disturbs power lines, and the machine being in an environment where very large electric motors are turning on and off (commercial air conditioning/heating units and manufacturing machines are the biggest offenders). A surge suppressor or a line conditioner can help with some of that, but a dedicated line to the machine might be indicated.

[Tuga]

Re: MPC2500 sc551 sc553

Well, I'd really like a bit more information before I give instructions, but I'll take a guess:
Check the quality of the power being supplied by the outlet the machine is plugged into. If you have a meter that can handle the outlet voltage monitor it that way for a little while. If you can get your hands on an appropriate line monitoring device that you can leave at the machine's location for a couple of days, that would be even more useful. The voltage should change by 10% or less.
Spikes, surges and dropouts in the voltage supplied by the outlet can cause all manner of undesired operation from the machine, including error codes related to the fusing unit. Some common causes of that here are energetic storms, nearby construction that disturbs power lines, and the machine being in an environment where very large electric motors are turning on and off (commercial air conditioning/heating units and manufacturing machines are the biggest offenders). A surge suppressor or a line conditioner can help with some of that, but a dedicated line to the machine might be indicated.

HI

Are several machines mpc2500, already change the thermofuse and thermistor both the pressure roller and the hot roller

[TonerMunkeh]

Re: MPC2500 sc551 sc553

Eventually the fusers start popping 553 and must be replaced as a unit. There is no other permanent fix.

[Smee]

Re: MPC2500 sc551 sc553

pretty interesting TonerMunkeh - thats exactly where Im at with about 5 fusers - I simply cant get rid of the SC553's, I know its the fusers as it dosnt matter what MPC2500 I put it into, within 3 or 4 days I get this code. But Ive also replaced everything electrically, including lamps and they keep coding grrr....Guess i should throw them out and give up!

[anothertech]

Re: MPC2500 sc551 sc553

I hope someone comes up with a good solution for this, because I've been having the same problem, and my manager gives me a hard time about
changing out the whole unit. He say's we should be able to fix those, and I agree, we should, but no luck so far.

[TonerMunkeh]

[logrady2331]

Re: MPC2500 sc551 sc553

Hello all,
I cannot take credit for this as another technician on this site suggested it to me but here it is. Per his advice I started changing the fuser dirve motor when these errors occur. Over time the motor gets weak and starts slowly dying. Replacing the fuser seems to fix it but what is really happening is the new fusers are easier to turn and provide way less resistence to the fuser dirve motor, which is a load sensing motor and will code when sufficient resistance is encountered. A good visual is to look at the sticker on the fuser drive motor and you will notice it is turning a brownish color. That is heat causing the sticker to "cook". I have had this code three times in three different machines and replacing the fuser drive motor fixed every one of them. Motor is about 70.00 bucks. Hope this helps.

[Codex]

Re: MPC2500 sc551 sc553

Try to change the Thermostats, had a similar problem......the problem on these machines is than with an blown thermostat the machine goes to "Ready"..........because the fuser lamp heats the pressure roller too, and the machine works for a while........you can try it!!, disconnect the pressure thermostat, and you will see.......

[Besserwisser]

Re: MPC2500 sc551 sc553

Been working with these last 8 years, never changed the fuser when have had sc 5xx. Change Press thermistor and thermostat and dont foregett to clean the
thermophile "eye" inside the machine with alkohol...

[CrapAimer]

Re: MPC2500 sc551 sc553

Make sure the pressure roller thermal fuse hasn't blown, will come to ready even if it has, also check the bushings haven't worn replace them. if all fails have heard if you replace the wiring loom in the unit it sorts it out.

[GhostInTheMachine]

Re: MPC2500 sc551 sc553

I have had several of these also. It seems the pressure roller heat lamp is bad, even though there is continuity through it. The machine will warm up initially without that lamp but sometimes the SC will occur when coming out of sleep mode. Replace the lamp and the problem is solved.

You can verify by watching the press roller temp through SP mode. I forget which number. After the machine warms up, the press roller temp will immediately start dropping when the fuser stops turning.

I hope this helps many of you.

[Smee]

Re: MPC2500 sc551 sc553

Im still going with the "replace the entire fuser" option as above. I have 3 MPC2500 fusers on my desk ive been mucking around with for a while, every electrical component has been replaced - thermistors, thermostats, lamps - only thing not replaced is the loom. It dosnt matter which machine I put them into, they all code - so its gotta be a fuser fault. I liked the fuser motor fix as it makes sense but dosnt explain why the fault remains with the fusers.

Im going to throw them away...but id love to get to the bottom of this!

[TonerMunkeh]

Re: MPC2500 sc551 sc553

Hello all,
I cannot take credit for this as another technician on this site suggested it to me but here it is. Per his advice I started changing the fuser dirve motor when these errors occur. Over time the motor gets weak and starts slowly dying. Replacing the fuser seems to fix it but what is really happening is the new fusers are easier to turn and provide way less resistence to the fuser dirve motor, which is a load sensing motor and will code when sufficient resistance is encountered. A good visual is to look at the sticker on the fuser drive motor and you will notice it is turning a brownish color. That is heat causing the sticker to "cook". I have had this code three times in three different machines and replacing the fuser drive motor fixed every one of them. Motor is about 70.00 bucks. Hope this helps.

See I had that thought a couple of months ago. I fit the motor and completely rebuilt the fuser with new rollers, bearings, bushings, lamps etc and the bastard thing STILL coded. A complete fuser was the only thing that stopped it.