Page 4 of 4 FirstFirst 1234
Results 31 to 38 of 38
  1. #31
    Senior Tech 100+ Posts PA3040's Avatar
    Join Date
    Jun 2014
    Posts
    167
    Rep Power
    0

    Re: MP2001L copies with background

    Quote Originally Posted by slimslob View Post
    vsp and vsdp are readings taken by the p sensor (ID sensor) immediately following the ID patch. vsdp is used for design purposes only. PWM is calculated during developer initialization and process control. It has to do with the voltage/current applied to the emitter of the p sensor in order to get a valid reading for the surface of the drum prior to the ID patch.

    That all said, clean the p sensor. It is located in the PTR unit directly below the transfer roller. The sensor gets dirty and process control raises PWM. When PWM is increased, the ID patch looks lighter and process control increases the toner density causing back ground.

    Dear slimslob/ Thanks for the reply
    As per I red doc the vsdp mean the value read by the ID sensor just after vsp taken( without pattern ) I don't know reason

    As per the manual PWM value very from 0-255. I think 0 mean less pulse width and 255 mean higher pulse width ( high current and voltage apply to ID sensor ) and as per your explanation the dirty ID sensor mean high value for PWM. also I assume if drum potential also effect for the high value for PWM

    Please advice


  2. #32
    Senior Tech 100+ Posts PA3040's Avatar
    Join Date
    Jun 2014
    Posts
    167
    Rep Power
    0

    Re: MP2001L copies with background

    Quote Originally Posted by slimslob View Post
    vsp and vsdp are readings taken by the p sensor (ID sensor) immediately following the ID patch. vsdp is used for design purposes only. PWM is calculated during developer initialization and process control. It has to do with the voltage/current applied to the emitter of the p sensor in order to get a valid reading for the surface of the drum prior to the ID patch.

    That all said, clean the p sensor. It is located in the PTR unit directly below the transfer roller. The sensor gets dirty and process control raises PWM. When PWM is increased, the ID patch looks lighter and process control increases the toner density causing back ground.
    When PWM is increased, the ID patch looks lighter and process control increases the toner density causing back ground.
    Dear slim
    Can you please explain above sentence further
    How ID patch looks lighter when the PWM is increased


  3. #33
    Retired 5,000+ Posts slimslob's Avatar
    Join Date
    May 2013
    Location
    Bakersfield, CA
    Posts
    6,882
    Rep Power
    148

    Re: MP2001L copies with background

    Quote Originally Posted by PA3040 View Post
    Dear slim
    Can you please explain above sentence further
    How ID patch looks lighter when the PWM is increased
    The emitter led in the sensor is brighter.


  4. #34
    Senior Tech 100+ Posts PA3040's Avatar
    Join Date
    Jun 2014
    Posts
    167
    Rep Power
    0

    Re: MP2001L copies with background

    Quote Originally Posted by slimslob View Post
    The emitter led in the sensor is brighter.
    Thanks for the reply

    What kind of case the system take in to account to increase value of PWM other than dirty ID sensor


  5. #35
    Junior Member
    Join Date
    Aug 2016
    Posts
    1
    Rep Power
    0

    Re: MP2001L copies with background

    I have been experiencing the same especially after replacing a different toner. The solution then was to change the developed but going though the sp i changed sp2301 4 (transfer roller cleaning) to +1 and the background was removed. The default setting puts it at -1. After the setting change machines works well.


  6. #36
    Field Supervisor 500+ Posts Polarbear's Avatar
    Join Date
    Feb 2012
    Location
    Cape Town
    Posts
    818
    Rep Power
    25

    Re: MP2001L copies with background

    Quote Originally Posted by Polarbear View Post
    Which dev are you installing on first startup? B1219645 (dev28) or B1589645?

    The latter is the correct one as it uses different toner to the previous models.
    I am having to eat humble pie here...

    Since we have had these monsters in the field for a while now, they have started with their tricks.

    Sudden dirty backgrounds and random overtoning.

    Turns out that using the old B121 dev with the new toner sorts it out (nevermind what Ricoh says!)

    We have done several trials in the field and we get the same result every time.

    The D158 dev runs dirty after a while, especially machines that work hard. Overtoning and background is the end result no matter what else we do. Evening throwing new OEM drums at it only prolongs the suffering. One dev change and the nightmare is over.

    Press the GREEN button!!

  7. #37
    Junior Member
    Join Date
    Jul 2017
    Posts
    2
    Rep Power
    0

    Re: MP2001L copies with background

    Quote Originally Posted by Polarbear View Post
    I am having to eat humble pie here...

    Since we have had these monsters in the field for a while now, they have started with their tricks.

    Sudden dirty backgrounds and random overtoning.

    Turns out that using the old B121 dev with the new toner sorts it out (nevermind what Ricoh says!)

    We have done several trials in the field and we get the same result every time.

    The D158 dev runs dirty after a while, especially machines that work hard. Overtoning and background is the end result no matter what else we do. Evening throwing new OEM drums at it only prolongs the suffering. One dev change and the nightmare is over.
    I also have an issue of overtoning and slightly dirty backgrounds on my mp2001L after 30k copies and just like the thread starter, I used b158 genuine developer and genuine toner from my supplier. Now, i would like to change the developer. Should I stick to b158 or change to b121? Pls help. Thanks.


  8. #38
    Field Supervisor 500+ Posts Polarbear's Avatar
    Join Date
    Feb 2012
    Location
    Cape Town
    Posts
    818
    Rep Power
    25

    Re: MP2001L copies with background

    Quote Originally Posted by stupident View Post
    I also have an issue of overtoning and slightly dirty backgrounds on my mp2001L after 30k copies and just like the thread starter, I used b158 genuine developer and genuine toner from my supplier. Now, i would like to change the developer. Should I stick to b158 or change to b121? Pls help. Thanks.
    We have changed to b121 and never looked back. So much so we now configure new setups with b121 development to stop field issues.

    Sent from my SM-G925F using Tapatalk

    Press the GREEN button!!

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Get the Android App
click or scan for the Copytechnet Mobile App

-=-=-=-=-=-


IDrive Remote Backup

Lunarpages Internet Solutions

Advertise on Copytechnet

Your Link Here