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  1. #1
    Technician mbgemini's Avatar
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    Question Photosensitive Drums life of CLC copiers

    Could anyone tell me: for how many copies Canon guarantees photosensitive drums? In Service Manual is reported life for many spares but not for drums.
    Can they effectively work more than guaranteed life?
    We bought sometimes ago and used CLC 1130; in service mode it tells 313K copies TTL, but we don't know if drum has ever been changed before. Can a drum really make all these copies?


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    Re: Photosensitive Drums life of CLC copiers

    Quote Originally Posted by mbgemini View Post
    Could anyone tell me: for how many copies Canon guarantees photosensitive drums? In Service Manual is reported life for many spares but not for drums.
    Can they effectively work more than guaranteed life?
    We bought sometimes ago and used CLC 1130; in service mode it tells 313K copies TTL, but we don't know if drum has ever been changed before. Can a drum really make all these copies?
    On the CLC series machines you were doing good to 100K out of the drum before copy quality and error codes would start happening. You would need a service log to tell when it was replaced though as this unit did not accuratly track life like the new machines do.

    Accidents don't just happen. They must be carelessly planned.

  3. #3
    Technician mbgemini's Avatar
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    Re: Photosensitive Drums life of CLC copiers

    Quote Originally Posted by charm5496 View Post
    On the CLC series machines you were doing good to 100K out of the drum before copy quality and error codes would start happening. You would need a service log to tell when it was replaced though as this unit did not accuratly track life like the new machines do.
    Service log = *28* ? If yes, can I read in somewhere the total copies of the last drum installed?
    The copier has worked well untill some weeks ago. The it started with some errors.
    The problem now is error code E061 0070 (bias grid over 900) and I can't be able to make copies nomore. I slided out primary corona, but it seems ok. I don't know where starting to solve problem.
    Can someone help me??


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    Re: Photosensitive Drums life of CLC copiers

    Quote Originally Posted by mbgemini View Post
    Service log = *28* ? If yes, can I read in somewhere the total copies of the last drum installed?
    The copier has worked well untill some weeks ago. The it started with some errors.
    The problem now is error code E061 0070 (bias grid over 900) and I can't be able to make copies nomore. I slided out primary corona, but it seems ok. I don't know where starting to solve problem.
    Can someone help me??
    the service mode does not track this information. It has to be tracked by hand in a service log....it's the only way.
    E061 can be anything from needing a PM which includes replacing the carona wires and cleaning those sensors that measure the drum voltage as they get soiled with toner. When you slide the drum out it should be a light grey color...if it green in color then you need to replace it as it is old and worn.

    Accidents don't just happen. They must be carelessly planned.

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    Re: Photosensitive Drums life of CLC copiers

    the rear flange on drum assembly needs to also be cleaned/
    use scotch bright pad to clean bias ring


    pull out drum/ if surface has a dark green look
    -replace drum/primary grid plate/ Primary post/drum blade


    **Knowledge is time consuming, exhausting and costly for a trained Tech.**

  6. #6
    Senior Tech 100+ Posts DANIELCANON's Avatar
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    Re: Photosensitive Drums life of CLC copiers

    for clear code E061-0070 execute:
    *28*
    copier
    adjust
    laser
    p3-vff-4 = 0


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    Re: Photosensitive Drums life of CLC copiers

    E061-0070 =The grid bias output value is 900 V or more.
    • The grid bias is at the upper control limit.
    Usually means the DRUM is toast= NG*******

    CLC1100 SERIES

    SERVICE MODE
    (*)(2,8)(*) >Initial screen>Select an item

    Checking the Surface Potential System

    If an image fault has occurred, you must be sure if the cause is in the static latent image
    formation block (including the photosensitive drum and the potential control system) or the
    developing/transfer system. To that end, the surface potential must be checked as follows:
    a. Checking the Surface Potential
    1) Select FUNCTION>DPC>DPC in service mode (for potential control).
    2) Check the following using DISPLAY>DPOT in service mode.
    SM.JPG
    Screen display----------Guide
    V00-500---------------430 to 570
    V00-700---------------600 to 800
    VFF-500---------------50 to 150
    VFF-700---------------100 to 200
    3) If the value is not as indicated, make a zero-level check.
    b. Zero-Level Check
    You can make use of a zero-level check to see whether the surface potential control circuit is
    good or not, thereby finding out whether the level shift circuit of the DC driver PCB and the
    potential measurement unit is good or not.
    A zero-level check is designed to find out whether the CPU reads the surface
    potential of the drum as '0' when it is 0 V.
    A zero-level check may be either of the following two:
    Method 1: to find out whether the level shift circuit on the DC driver PCB is good or not
    Method 2: to find out whether the potential measurement circuit is good or not
    1) Remove the rear cover.
    2) Turn on the power switch, and wait until the copier is in standby state.
    3) Disconnect the connector J4 (J440) of the potential measurement PCB.
    4) Short the check pins J1040-1 and -2 on the DC driver PCB with a jumper wire.
    5) Check to make sure that the reading of DISPLAY>DPOT>DPOT is 100 30 V in service
    mode.
    If yes, the part is normal. Go to step 8).
    6) Measure the voltage between GND CP and CP4 of the DC driver PCB to see if it is 0.49 0.1
    V.
    If no, suspect a fault in the level shift circuit on the DC driver PCB. If yes, suspect a fault in the
    A/D converter on the CPU PCB.
    7) Turn off the power switch, and disconnect the jumper wire; then, connect the connector.
    8) Mount the rear cover, and turn on the power switch.
    Method 2
    1) Turn off the power switch.
    2) Remove the photosensitive drum unit.
    3) Fit the potential sensor electrode (TKN-0197) to the potential sensor.
    When fitting the potential sensor electrode to the potential sensor, make sure that magenta of the electrode will not come into contact with the potential sensor base.
    Attach the clip of the jumper line to the potential sensor electrode.
    Be sure NOT to let the clip come into contact with the sensor cover. Further, be
    sure to allow enough distance from the sensor window.
    5) Connect one end of the jumper wire to the copier's chassis metal plate (GND) of the copier.
    6) Insert the cover switch actuator into the cover switch assembly.
    7) Turn on the power switch.
    After turning on the power switch, do NOT touch the potential sensor assembly.
    8) Check to make sure that DISPLAY>DPOT>DPOT is 100 30 V in service mode.
    If the reading is as indicated in method 1 but not as indicated in method 2, suspect dirt on the sensor or a fault in the potential measurement unit. If the reading is not as indicated in method 1 and method 2, you may assume that the signal path from the potential sensor unit to the CPU on the CPU PCB is
    normal.
    9) Turn off the power switch.
    10) Detach the potential sensor electrode.
    11) Mount the photosensitive drum unit.
    12) Turn on the power switch.


    E061-0070
    Check the temperature and humidity in service mode
    (COPIER>DISPLAY>ANALOG> TEMP/HUM). Are the readings normal?

    Is the photosensitive drum grounded properly?
    Clean the potential sensor.
    Replace the photosensitive drum

    **Knowledge is time consuming, exhausting and costly for a trained Tech.**

  8. #8
    Technician mbgemini's Avatar
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    Re: Photosensitive Drums life of CLC copiers

    Many Thanks to all of you for the answers. I need a little time to control your advices and the copier. I must divide my time between daughters, schools, homeworks, dentist! .... and so on. For my work, time is always too little ... I will do something in the afternoon and I'll post soon my results.


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    Technician mbgemini's Avatar
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    Red face Re: Photosensitive Drums life of CLC copiers

    Hi to all, here I am again. Well, I made these things:

    a. Checking the Surface Potential
    1) Select FUNCTION>DPC>DPC in service mode (for potential control).
    2) Check the following using DISPLAY>DPOT in service mode.

    V00-500---------------430 to 570 ---> 444
    V00-700---------------600 to 800 ---> 628
    VFF-500---------------50 to 150 ---> 129
    VFF-700---------------100 to 200 ---> 204

    DPOT = 83 - 84 (before shorting the check pins J1040-1 and -2)
    DPOT = 97 (during shorting)

    Check the temperature and humidity in service mode
    (COPIER>DISPLAY>ANALOG> TEMP/HUM). Are the readings normal?
    Temp: 23
    HUM: 18.30%
    ABS-HUM: 3.17 g

    Is the photosensitive drum grounded properly?
    I don't know how to verify this.

    Clean the potential sensor.
    Where is it exactly? Could you post a figure from service manual?

    I removed the photosensitive drum unit and cleaned. Now I think I need to find the following parts new but I didn't find part number.
    Is there in somewhere a part catalog of all machine? I know some codes but not all of them. Is it also possible to find only the adhesive strips of various parts of this copier without the metal part?

    Thanks for the moment. Barbara


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    Re: Photosensitive Drums life of CLC copiers

    u do not need to order those drum parts/ put them back


    what color is the DRUM/ POST A PIC-

    **Knowledge is time consuming, exhausting and costly for a trained Tech.**

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