Light copies ES 4540c

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  • Larhal
    Retired

    Site Contributor
    VIP Subscriber
    500+ Posts
    • May 2013
    • 545
    #1

    [CQ] Light copies ES 4540c

    Hi All,
    Boss has gotten a few , used, E Studio 4540c and wants to put them out in the field. I got stuck getting them ready. I am NOT Toshiba trained, Ricoh yes. Problem is I have 1 machine I cannot get the density up on. I even changed developer in the dev unit and did all the settings in the manual to set the dev units. Drums are newish and same with transfer belt. I checked all the developer gaps and such so they are OK. If I put some toner from the cartridge into the Developer units, the density goes up nicely.

    Did successfully do a developer replacement on 2 other units.

    Question. Can you do a forced feed on these units so increase the toner ratio in the developer unit and then set the developer?

    Any help would be greatly appreciated.

    LArhal
    Larhal

    Retired

    If all else fails read the Service Manual!

    If that fails, meet me at the pub and we will discuss it.
    Tags: None
    • blackcat4866
      Master Of The Obvious

      Site Contributor
      10,000+ Posts
      • Jul 2007
      • 22997
      #2
      Re: Light copies ES 4540c

      Does it have the smooth mag roller? The Toshibas with the smooth mag rollers can experience "developer slip" or light/blurry areas of the print. You don't need to vacuum out the black developing unit. Just wipe the developer to one side with a dry towel, and scuff the surface with one of those green scrubbies. Then wipe the developer back to the scuffed side and repeat. Rotate the mag roller to reveal a new area and repeat until you've scuffed the entire roller. You'll have to re-do the calibration. =^..^=
      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 =^..^=

        Comment

        • Larhal
          Retired

          Site Contributor
          VIP Subscriber
          500+ Posts
          • May 2013
          • 545
          #3
          Re: Light copies ES 4540c

          Originally posted by blackcat4866
          Does it have the smooth mag roller? The Toshibas with the smooth mag rollers can experience "developer slip" or light/blurry areas of the print. You don't need to vacuum out the black developing unit. Just wipe the developer to one side with a dry towel, and scuff the surface with one of those green scrubbies. Then wipe the developer back to the scuffed side and repeat. Rotate the mag roller to reveal a new area and repeat until you've scuffed the entire roller. You'll have to re-do the calibration. =^..^=
          Thank you Blackcat. I will do this and see the results. But still is there any way to force feed a Toshiba?

          Larhal
          Larhal

          Retired

          If all else fails read the Service Manual!

          If that fails, meet me at the pub and we will discuss it.

            Comment

            • blackcat4866
              Master Of The Obvious

              Site Contributor
              10,000+ Posts
              • Jul 2007
              • 22997
              #4
              Re: Light copies ES 4540c

              I haven't worked on enough of them yet to know. =^..^=
              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 =^..^=

                Comment

                • michaelc
                  Field Tech

                  Site Contributor
                  500+ Posts
                  • Mar 2011
                  • 590
                  #5
                  Re: Light copies ES 4540c

                  Did you reset any counters in the PM support mode?
                  It didn't say that I couldn't do it in the manual.

                    Comment

                    • Larhal
                      Retired

                      Site Contributor
                      VIP Subscriber
                      500+ Posts
                      • May 2013
                      • 545
                      #6
                      Re: Light copies ES 4540c

                      Yes I reset all counters for the PM
                      Larhal

                      Retired

                      If all else fails read the Service Manual!

                      If that fails, meet me at the pub and we will discuss it.

                        Comment

                        • mckinley
                          Chief Twiddler

                          100+ Posts
                          • Dec 2006
                          • 150
                          #7
                          Re: Light copies ES 4540c

                          You're best not to add more toner to the dev than it should have.
                          If you have light prints / copies there's probably an underlying reason, this could be anything from a simple reset the gamma tables (08 - 7300) & then setup all the IQC & Gamma again. Through to a dirty LSU (dusty mirrors), poor charge on the 1st transfer rollers (in the transfer belt unit) - the non-contact end block (ie the one which doesn't have a wire) should NOT be able to conduct a charge - i've seen them leak charge & cause very light copies.
                          The charge blocks on the rear frame (behind the laser shutter) sometimes get a hair-line crack which causes either C970 errors or sometimes starts as feint copies (i fix this with nail varnish)
                          The transfer belt breaking down (sometimes can look perfectly ok) will cause light copies.
                          A bad earth on the leaf spring at the end of the 2nd transfer roller - the spring sits against a bearing (the roller doesn't have charge, it has an earth)
                          A bearing missing from 2nd transfer (there are 2 you can see, but also 2 hidden inside black plastic housings on the roller) - this is common when an engineer has serviced the 2nd tr & vacuumed the bearing up or dropped it & lost it.

                          Regards.
                          Happiness Is The Road.

                            Comment

                            • Larhal
                              Retired

                              Site Contributor
                              VIP Subscriber
                              500+ Posts
                              • May 2013
                              • 545
                              #8
                              Re: Light copies ES 4540c

                              Originally posted by mckinley
                              You're best not to add more toner to the dev than it should have.
                              If you have light prints / copies there's probably an underlying reason, this could be anything from a simple reset the gamma tables (08 - 7300) & then setup all the IQC & Gamma again. Through to a dirty LSU (dusty mirrors), poor charge on the 1st transfer rollers (in the transfer belt unit) - the non-contact end block (ie the one which doesn't have a wire) should NOT be able to conduct a charge - i've seen them leak charge & cause very light copies.
                              The charge blocks on the rear frame (behind the laser shutter) sometimes get a hair-line crack which causes either C970 errors or sometimes starts as feint copies (i fix this with nail varnish)
                              The transfer belt breaking down (sometimes can look perfectly ok) will cause light copies.
                              A bad earth on the leaf spring at the end of the 2nd transfer roller - the spring sits against a bearing (the roller doesn't have charge, it has an earth)
                              A bearing missing from 2nd transfer (there are 2 you can see, but also 2 hidden inside black plastic housings on the roller) - this is common when an engineer has serviced the 2nd tr & vacuumed the bearing up or dropped it & lost it.

                              Regards.
                              Thank you for the information. I will inspect and clean all items and do the gamma tables. Thank you for the information. Much appreciated.

                              Larhal
                              Larhal

                              Retired

                              If all else fails read the Service Manual!

                              If that fails, meet me at the pub and we will discuss it.

                                Comment

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