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  1. #1
    Senior Tech 100+ Posts barber782's Avatar
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    ES 7516AC error C471

    Hi everyone,

    Installed two Toshiba es7516ac's in a school in December 2019. After a few weeks one is getting the error code C471. Which is to do with the fuser, and turned out to be a blown thermistor.
    Iv replaced the part and reassembled the fuser sleeve components with plenty of oil.
    Now a month later the same error has appeared.
    Does anyone know why this would keep happening? Or anyone experiencing the same on these.

    Sent from my VTR-L09 using Tapatalk

  2. #2
    Service Manager 5,000+ Posts
    ES 7516AC error C471

    Phil B.'s Avatar
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    Re: ES 7516AC error C471

    Quote Originally Posted by barber782 View Post
    Hi everyone,

    Installed two Toshiba es7516ac's in a school in December 2019. After a few weeks one is getting the error code C471. Which is to do with the fuser, and turned out to be a blown thermistor.
    Iv replaced the part and reassembled the fuser sleeve components with plenty of oil.
    Now a month later the same error has appeared.
    Does anyone know why this would keep happening? Or anyone experiencing the same on these.

    Sent from my VTR-L09 using Tapatalk
    OIL on fuser sleeves?

    are they the SOFT fuser films?

    do you mean the white fuser GREASE?

    don't know of fusers that take oil on the rollers/sleeves unless applied by a fuser web .. or brush assm.

    please clarify product used on sleeves.

  3. #3
    Service Manager 1,000+ Posts
    ES 7516AC error C471

    SalesServiceGuy's Avatar
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    Re: ES 7516AC error C471

    If you have two copiers both doing the same thing, I would be suspicious of the power supply. The copiers work well and they are only a few months old.

    Get a Tripp Lite LC2400 and check for brownouts. If the LC2400 starts repeatedly clicking, it is trying to compensate for unstable power supply.

    Also, ESP's Digital QC surge suppressor will instantly check for poor grounding plus you can purchase a cable attached to your laptop installed with ESP's software and see some visuals on the quality of the power supply.

  4. #4
    Master Of The Obvious 10,000+ Posts
    ES 7516AC error C471

    blackcat4866's Avatar
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    Re: ES 7516AC error C471

    I have an eS8508A (basicly the same fuser) that has blown the thermostat (4) times. I put the power quality analyzer on the line but did not catch anything interesting. It usually goes for 6 weeks or more, and I didn't want to leave the analyzer sitting there for 6 weeks.

    Phil: these film fusers use a thick silicone based oil (in this case OIL-965-100). We have seen cases of the inside of the sleeve drying out, taking out the fuser drive gears. That's why barber mentions using the oil generously.

    I suspect power. =^..^=
    If you'd like a serious answer to your request:
    1) demonstrate that you've read the manual
    2) demonstrate that you made some attempt to fix it.
    3) if you're going to ask about jams include the jam code.
    4) if you're going to ask about an error code include the error code.
    5) You are the person onsite. Only you can make observations.

    blackcat: Master Of The Obvious =^..^=

  5. #5
    Senior Tech 100+ Posts barber782's Avatar
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    Re: ES 7516AC error C471

    Yes the oil from Tosh seems a bit viscous and dries out quick. But I have used ricoh oil before with success.
    Will have to check the power supply.

    Sent from my VTR-L09 using Tapatalk

  6. #6
    Senior Tech 250+ Posts
    ES 7516AC error C471

    Blizzoo's Avatar
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    Re: ES 7516AC error C471

    Make sure the users are setting the correct thickness for the paper they use.

    My 1st C471 had the thermostat blown because they used 160gsm paper as plain paper and this caused the fuser to overheat.

    The fuser oil type has been changed to a low viscosity to prevent the belts to torn apart and this can be ordered separately.
    Defects are simple, our mind is complicated

  7. #7
    Senior Tech 100+ Posts barber782's Avatar
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    Re: ES 7516AC error C471

    They only use 80gsm I think. I did mention to customer about getting a surge protector.

    Sent from my VTR-L09 using Tapatalk

  8. #8
    Senior Tech 100+ Posts
    ES 7516AC error C471


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    Re: ES 7516AC error C471

    When I read the original post, I had a flash back, but the school I was at had two 8508a.

    It sure seems like the C471 code is on the rise and each time the thermostat is open circuit. There is a bulletin about a change in the thermostat holder, but the machines Iíve seen have the updated holder and still suffer from C471.

    sorry, nothing to offer in way of a solution.

  9. #9
    Senior Tech 100+ Posts barber782's Avatar
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    Re: ES 7516AC error C471

    Ordered those modified holders, just waiting for them to arrive. Not holding much hope though.

    Sent from my VTR-L09 using Tapatalk

  10. #10
    Senior Tech 250+ Posts
    ES 7516AC error C471

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    Re: ES 7516AC error C471

    You will have more success if you put new fuser belt, oil and new sheet pad. If these are all good just clean old remaining oil and put new oil 6LK44116000 - OIL-SILICONE-100CS Except CND or 6LK44116100 - OIL-SILICONE-100CSC for CND supplied as a service part.

    Pay attention how you install the new holder/thermostat especially the wiring side.
    Defects are simple, our mind is complicated

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