Tech forums for copier repair  

Go Back   Copytechnet.com > Technical Forums > Copier Technical Discussion > Konica Minolta

Bizhub c451 dirty copies

Konica Minolta

Reply

 

LinkBack Thread Tools Display Modes
Old 10-13-2009   #1 (permalink)
Junior Member
 
Join Date: Oct 2009

United States us california
Location: Chatsworth CA
Posts: 8
Rep Power: 0ICEDRAGON is on a distinguished road
Bizhub c451 dirty copies

Hello :-)

I have a c451 that keeps killing black IU, they run for 5,000 or 6,000 pages and then start dumping devloper all over one end of the sheet.

I have replaced two black image units so far (in less then a week) and I am waiting on a third unit. We replaced the High Voltage unit /1 and no help. The only black imager that works is one that had the chip reset and it's drum is getting old.

Any thoughts?
ICEDRAGON is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
Sponsored Links
Old 10-13-2009   #2 (permalink)
Trusted Tech
50+ Posts
 
Join Date: Sep 2008

United States us michigan
Location: Flat Rock Michigan
Posts: 83
Rep Power: 3Albonline is on a distinguished road
Quote:
Originally Posted by ICEDRAGON
View Post
Hello :-)

I have a c451 that keeps killing black IU, they run for 5,000 or 6,000 pages and then start dumping devloper all over one end of the sheet.

I have replaced two black image units so far (in less then a week) and I am waiting on a third unit. We replaced the High Voltage unit /1 and no help. The only black imager that works is one that had the chip reset and it's drum is getting old.

Any thoughts?
is iron showing up in the cleaner box? is iron on the xfer belt if you stop mech during stablization? were the 2 (dead) black units oem? same lot number?
Albonline is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
Old 10-13-2009   #3 (permalink)
Junior Member
 
Join Date: Oct 2009

United States us california
Location: Chatsworth CA
Posts: 8
Rep Power: 0ICEDRAGON is on a distinguished road
Bizhub C451

What should the iron look like?

Yes both black IU were OEM, I will check the lot numbers.

The funny thing is it runs fine with the reset IU.
ICEDRAGON is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
Old 10-13-2009   #4 (permalink)
Junior Member
 
Join Date: Oct 2009

United States us california
Location: Chatsworth CA
Posts: 8
Rep Power: 0ICEDRAGON is on a distinguished road
Bizhub c451 printing clean again with ne black iu

The bad ones are from the same lot!

The new one is from a differnt lot and is printing fine now, I am crossing my fingers that it will last longer than 6,000 sheets.
ICEDRAGON is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
Old 10-13-2009   #5 (permalink)
JSC
Senior Tech
100+ Posts
 
JSC's Avatar
 
Join Date: Dec 2006

England
Posts: 190
Rep Power: 7JSC is on a distinguished road
Quote:
Originally Posted by ICEDRAGON
View Post
What should the iron look like?
Stick a magnetic screwdriver in the waste btl, if the machine is pulling the dev (Iron) it will be attracted to the screwdriver, if this is the case then an ICP has blown on the main board.
JSC is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
Old 10-14-2009   #6 (permalink)
Junior Member
 
Join Date: Oct 2009

United States us california
Location: Chatsworth CA
Posts: 8
Rep Power: 0ICEDRAGON is on a distinguished road
No iron in the waste bin yet

We are 1,327 prints in on the new imager running 11 x 17 on thick 1 in greyscale mode now and no problems yet. I just hope it was a bad IU X2 and not an expensive main board, we are barely makeing it over here and own this machine with no service contract so this could hurt bad, cross your fingers...I will keep you posted.

We just had the latest firmware insalled about a month ago, could this be a firmware issue?
ICEDRAGON is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
Old 10-14-2009   #7 (permalink)
Junior Member
 
Join Date: Oct 2009

United States us california
Location: Chatsworth CA
Posts: 8
Rep Power: 0ICEDRAGON is on a distinguished road
Dirty copies back

After running 2,400 11 x 17 sheets the problem is back, black IU dumping iron on one side of the sheet.

How can we tell if its the main board for sure, we already replaced the High Voltage Unit /1 and went through three black IU, any ideas on what is causing the problem?
ICEDRAGON is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
Old 10-14-2009   #8 (permalink)
JSC
Senior Tech
100+ Posts
 
JSC's Avatar
 
Join Date: Dec 2006

England
Posts: 190
Rep Power: 7JSC is on a distinguished road
Can you post a scan of the copy quality problem?
JSC is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
Old 10-14-2009   #9 (permalink)
Junior Member
 
Join Date: Oct 2009

United States us california
Location: Chatsworth CA
Posts: 8
Rep Power: 0ICEDRAGON is on a distinguished road
Bizhub c451 dirty copies

There is Iron on the sheets and in the waste box, we have decided to change the main print control board on the machine, it controls the black imager and we think its bad.

The part is on its way and we should know by tomorrow if its the bad part.

thank you for all your sugestions. :-)
ICEDRAGON is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
Old 4 Weeks Ago   #10 (permalink)
Junior Member
 
Join Date: Oct 2009

United States us california
Location: Chatsworth CA
Posts: 8
Rep Power: 0ICEDRAGON is on a distinguished road
Dirty copies on the c451 are back!

Hello & Happy Sunday! :-)

WE replaced the PWB assembly MC and it ran fine like normally and then after 6,000 pages the iron is back on the sheet

Now we have replaced two boards and the proble hasn't changed, any Ideas?
ICEDRAGON is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
Reply

Tags
bizhub, c451, copies, dirty

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Google

All times are GMT +1. The time now is 06:53 AM.


Your Link Here
Toner Chip Resetter
Your Link Here

Powered by vBulletin® Version 3.8.3
Copyright ©2000 - 2009, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.3.0
Ad Management plugin by RedTyger