MP 7503 SC 555

[mikadonovan]

Hi, All. I have a sc555 on a 7503 that will not clear. Both thermistors have been replaced, and all thermostats check good. Anybody run into this before?

[Codex]

Re: MP 7503 SC 555

Check harness and connector machine side and on the fusing unit. , try to put back fusing unit a little bit stronger. Check also cleaning web.
Check fuser lamps for black rings and make a continuity test with a tester.


Inviato dal mio SM-S901B utilizzando Tapatalk

[slimslob]

Re: MP 7503 SC 555

I have had the tab on connector pins fail and allow the pins to push back just enough to prevent proper connection.

[tonerhead]

Re: MP 7503 SC 555

On a previous generation, there was a bulletin about placing spacers in the fuser rear connector to make for a tighter connection. I remember just loosening the screws, cut a paper clip for a spacer and sticking it in behind the connector. Not entirely sure on this, but it seems to me you might get that error if the lamps are not in the correct holes for the holders.

[luca72]

Re: MP 7503 SC 555

Hi, All. I have a sc555 on a 7503 that will not clear. Both thermistors have been replaced, and all thermostats check good. Anybody run into this before?

don't trust it, change the thermostats, and check that the connector on the machine is free from foreign bodies

if dont work try to save the mc data with sp 5-824 in a SD card, and run sp 801 engine.

[bat]

Re: MP 7503 SC 555

Check the lamps. On previous generation machines i had a few blown lamps.

[Brianneoe]

Re: MP 7503 SC 555

Same issue on a 7503 turned out to be low voltage below 110 coming out the outlet. Spoke with the building maintenance and they did their magic and the problem went away.

[tonerhead]

Re: MP 7503 SC 555

Same issue on a 7503 turned out to be low voltage below 110 coming out the outlet. Spoke with the building maintenance and they did their magic and the problem went away.

I forgot all about wall voltage. I remember getting a lot of SC542's from low voltage coming out of sleep mode or powering on. Good tip.

[GIUBOSS]

Re: MP 7503 SC 555

If I remember correctly you need to set SP 1-902 to 0

[slimslob]

Re: MP 7503 SC 555

If I remember correctly you need to set SP 1-902 to 0

That is to clear SC550.

[GIUBOSS]

Re: MP 7503 SC 555

That is to clear SC550.

Yep, I checked...

[mikadonovan]

Re: MP 7503 SC 555

It turned out that one of the thermistors I installed was faulty.

[elmaligno]

Re: MP 7503 SC 555

1. Check whether the thermistors are clean or dirty.
2. If the thermistors are clean, move to #3.
   • If the thermistors and/or hot roller are expected to reach PM yield before the next service visit (or have already reached yield), replace them.
   • If yield will not be reached before the next visit, but the surface of the thermistors and/or hot roller is dirty, clean the toner/dust off the surface.

1. Change the setting of SP1105-002 (Fusing temperature adjustment Normal Time (End thermister) to 180 seconds (default: 190 seconds).

Note:

• Please make sure that the following SP settings are set to the default values, otherwise, SP mode adjustment may not effect to resolve the problem.
  
  SP1105-001, SP1105-003~14, SP1107-1~24
• Changing SP1105-002 from the default to 180 degrees may affect the print image (poor fusing image) especially thick paper at the right after recovery from machine ready condition. In this case,. Please change the SP1907 (Pre-Fusing idling time to 1 (default: 0). Depend on the kind of paper, select the SP1907-1~10.