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  1. #1
    Junior Member goldenboy's Avatar
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    SC 555 on MP 7001

    I have a new installed 2 machine MP 7001, one of them had an error code SC 555 after 100K copies, done cleaning a 2 thermistors and reset error code by accessing sp mode then turning off and on power switch. checking the customer's power voltage not exactly 220 volts. my concern is...why the other machine is not given error code? is anybody experience this trouble? please advise...thanks in advance.


  2. #2
    How'd ya manage that? 500+ Posts zed255's Avatar
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    Oh boy, do a little search for SC542 and SC555. The whole series of machines going back to the 2055 have been well known for throwing these codes. There's no sure fire solution either, AFAIK. We live with these codes quite often.

    Zed
    One out of four people is mentally unbalanced.
    Think of your three closest friends...
    If they seem okay, then You're The One.

  3. #3
    Service Manager 10,000+ Posts
    SC 555 on MP 7001

    JustManuals's Avatar
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    This Parts & Service manual can now be purchased for $11.77 and downloaded immediately after payment from The Internet's largest collection of manuals


    Paul@justmanuals.com



  4. #4
    Service Manager 100+ Posts delosangeles's Avatar
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    Try this

    Here is the Bulletin.

    BULLETIN NUMBER: D062/D063/D065/D066 002 REISSUE


     06/03/2010

    APPLICABLE MODEL:


    RICOH - Aficio MP 6001/MP 6001 SP/MP 7001/MP 7001 SP/MP 8001/MP 8001 SP


    MP 9001/MP 9001 SP


    SYMPTOM:


    A SC542 or SC555 occurs.


    CAUSES:




    Temperature misdetection has occurred by the thermistors.



    When using paper with a high paper dust content, the amount of toner that sticks to the surface of

    the fusing roller increases. This toner and paper dust mix then sticks to the temperature-detecting


    elements of the thermistors. As a result, the thermistors are unable to detect the temperature of the


    fusing roller correctly.



    SOLUTIONS:


    If the symptoms occur:


    1. Clean or replace the Fusing Roller.


    NOTE:


    If the fusing roller is dirty, the toner and paper dust tends to stick to the thermistor more easily.

    If the SC codes continue:


    2. Replace the Middle and Rear Thermistor Brackets.


    NOTE:


    This will secure the thermistors in the correct position, which ensures that they can detect the

    roller temperature correctly.


    The distances [A] are different between


    the new and old style brackets.



    Old P/Ns - B1404196/7: 14.8 mm


    New P/Ns - D0624196/7: 15.3 mm


    


    


    [A]


    Tech Service Bulletin No. D062/D063/D065/D066 002 REISSUE


    

    Page 2 of 3


    3. Replace the Middle and Rear Thermistors with the new style thermistors. See GENERAL for P/N


    information.


    NOTE:


    The new style Thermistor is resistant to toner buildup on its surface.

    Changes:


    1) The material of the Teflon tape has been changed.


    2) The width of the Teflon tape has been decreased.


    3) The thickness of the Teflon sheet has been increased.



    Reasons:


    1) To make the surface smoother.


    2), 3) To make it more difficult for toner to stick to the surface.


    Old New


    Correct position of the thermistor

    GENERAL:


    The following part information is being issued for all D062 Series Parts Catalogs.


    D062 Series REFERENCE


    OLD PART NO. NEW PART NO. DESCRIPTION QTY INT PAGE ITEM


    B1404197 D0624197 Bracket: Thermistor: Middle 1 3/S 105 10


    B1404196 D0624196 Bracket: Thermistor: Inner Back 1 3/S 105 11


    NOTE:


    The above listed parts should be replaced as a set when replacing for the first time.



    Tech Service Bulletin No. D062/D063/D065/D066 002 REISSUE


    

    Page 3 of 3


    The following part information is being issued for all D062 Series Parts Catalogs.


    D062 Series REFERENCE


    OLD PART NO. NEW PART NO. DESCRIPTION QTY INT PAGE ITEM


    AW100108 AW100131 Thermistor: Fusing: Middle 1 3/S 105 12


    AW100109 AW100132 Thermistor: Fusing: Inner Back 1 3/S 105 13


    NOTE:


    The above listed parts should be replaced as a set when replacing for the first time.

    UNITS AFFECTED:


    The serial number cut-in information was not available at time of this publication.


    INTERCHANGEABILITY CHART:


    0


    OLD and NEW parts can be used in both OLD and

    NEW machines.


    2


    NEW parts CAN NOT be used in OLD machines.

    OLD parts can be used in OLD and NEW machines.


    1


    NEW parts can be used in OLD and NEW machines.

    OLD parts CAN NOT be used in NEW machines.


    3


    OLD parts CAN NOT be used in NEW machines.

    NEW parts CAN NOT be used in OLD machines.


    3/S


    Must be installed as a set on units manufactured prior to the S/N cut-in. On units manufactured after the S/N cut-in or

    previously modified, use the new part numbers individually.


    Trade like a tiger sleep like a baby

  5. #5
    Field Supervisor 1,000+ Posts RRodgers's Avatar
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    like stated above, there is a new thermistor available to help keep these codes down. But... I would recommend that you have this code rather than just clean um... replace them as well, as it will come back. These machines do this all the time. Also, be sure that the pressure roller hasn't developed a "flat spot(s)" you'll hear it thump when you turn the fuser drive knob. (the one to get jams out)

    Ugggg... they can be a pain... I mean really... WTF!!! I get the code with the damn thing barely dirty!!

    Color is not 4 times harder... it's 65,000 times harder. They call it "TECH MODE" for a reason. I have manual's and firmware for ya, course... you are going to have to earn it.

  6. #6
    How'd ya manage that? 500+ Posts zed255's Avatar
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    I have installed several sets of new brackets and thermisters. I think they are worth doing but aren't a complete cure, they just extend the interval between occurrences. Turning the AOF feature in user tools off helps too.

    Zed
    One out of four people is mentally unbalanced.
    Think of your three closest friends...
    If they seem okay, then You're The One.

  7. #7
    Technician
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    hello
    you have updated the softwares of the machine?
    the version engine D0625127P corrects a problem of code sc555


  8. #8
    FORMER Techie 1,000+ Posts tcs04's Avatar
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    Eric is correct... I had 2 brand new MP8001's with this problem, they already had the latest (Spot) brackets and we changed to the slimmer thermistors even before they were on general release. They DID NOT cure the fault! new firmware was installed as soon as it was released and the machines have run for for 6 months without a problem!... IT'S THE FIRMWARE!!!!!


  9. #9
    Service Manager 100+ Posts delosangeles's Avatar
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    it's the Firmware dumby

    Quote Originally Posted by tcs04 View Post
    Eric is correct... I had 2 brand new MP8001's with this problem, they already had the latest (Spot) brackets and we changed to the slimmer thermistors even before they were on general release. They DID NOT cure the fault! new firmware was installed as soon as it was released and the machines have run for for 6 months without a problem!... IT'S THE FIRMWARE!!!!!
    Great input from everone, this is a thread one should not forget.

    Got to love our forums!!

    Trade like a tiger sleep like a baby

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