add toner indication for magenta

[sharpmind]

guys, need help....!

I have MPC 2500 which shows add toner (magenta).When i checked the machine in the customer site, the toner bottle for magenta was empty..I thought that was the only reason why it shows add toner. I brought a new toner and put it in the machine then the machine showed loading toner.It took sometime to load and when it finished still add toner indication appears.

I cleaned the toner pipe and pump, no luck..exchange the pumps..still no luck...I also replaced the development unit still add toner appears..I checked the image belt unit and I saw a lot of magenta toner got into it..I am wondering why it was happening..It really breaks my head..!

It also showed SC 361

do you have any idea???please advise.....

[MikeyP]

try this clean all ID sensors first then ,enter SP mode and select 3045 ,turn to non detect ,power m'c off and on.
All four toner icons should now be at four bars...(assumes you have this switched on)
run some copies to ensure CQ is ok.
reenter 3045 and switch back to detect....GOOD LUCK!

[Eric1968]

SC361 is a TD-sensor problem for magenta. Are you using original toner?

[sharpmind]

yes, we are using original toner because our company is an exclusive distributor of ricoh machines. I am wondering also why magenta toner get into the whole image belt..it seems like it is grounded or no bias..please help..

[Eric1968]

Could be a loose charge roller. When there's no charge on the drum the whole drum is covered with toner, which is transferred to the belt.

[rsyarcia]

It means if you have a lot of magenta on the ITB then the toner supply is functioning so the problem is the TD sensor not detecting properly.Try checking and cleaning the connector. Read about the SP modes.

[sharpmind]

i cleaned the id sensor and turned off the toner end detection.I checked the ground contact of pcu magenta and fixed it. Then I switched off and on the machine.The machine got ready and the toner indicator for all colors were full.I ran the machine and no magenta toner got into the whole image belt.I was able to perform the autocolor calibration and as I checked the test print, only black color appeared..No other colors were present in the page. I tried also the color registration and it was successful.Then I tried again the autocolor calibration to check the registration of all colors.Unfortunately,test printing failed and not able to perform the process.

I checked the Vt display of all colors and the range were above five points.

Any more ideas to suggest??

[teebee1234]

Sounds like the ITB is cammed away from the color pcu's. That would explain the lack of color on the printout but I'm not sure though how you can get a successful color registration if that's the case. I would inspect the ITB assy again and check the contact/release mechanism in it and also the contact motor in the rear. You might want to swap out the ITB unit for testing if you have another one available.

[sharpmind]

I was not able to get a successful autocolor calibration output.Black color only appeared on the test print.

After checking again the toner mechanism at the rear side and putting back all the connectors, the machine showed SC 672. We (I and senior technician) checked and connected the board and the connectors several times yet the error did not go. This machine gives us a lot of problem!!!!!

Could be this add toner and copy quality issues related to controller board problem??Do you think the controller board is malfunctioning that after several try it shows an error SC 672??

Please note that this machine is not used for several months and the customer location is near the sea.

[RRodgers]

Sounds like the ITB is cammed away from the color pcu's. That would explain the lack of color on the printout but I'm not sure though how you can get a successful color registration if that's the case. I would inspect the ITB assy again and check the contact/release mechanism in it and also the contact motor in the rear. You might want to swap out the ITB unit for testing if you have another one available.

I'm with him.

[sharpmind]

Maybe you are right with your suggestion. I really appreciate it. But why magenta toner is not detected??This is main problem of the machine.Second, no color output in the test page. After several checking, SC 672 occurs. Weird machine!

[jivedancer]

Interesting if the pipes are empty or are the blocked ie full then in all probabilty it is the pump clutch that is the issue here. remove the pump flush the clutch out with IPA and does this cure the problem. If the pipe is full then look further down the line ie the dev unit is starved of toner change the clutch pump assembly