Thanks Thanks:  0
Likes Likes:  0
Dislikes Dislikes:  0
Page 1 of 3 123 LastLast
Results 1 to 10 of 23

Thread: Canon NP 6050

  1. #1
    Junior Member
    Join Date
    Jan 2008
    Location
    Baton Rouge, LA
    Posts
    6
    Rep Power
    0

    Canon NP 6050

    I have a customer that has an old Canon NP 6050 and the copies are coming out blank. The charge corona looks good. Can't pull out drum section to see anything. Any ideas?


  2. #2
    Service Manager 250+ Posts lkrsardis's Avatar
    Join Date
    Dec 2007
    Location
    batesville ms
    Posts
    319
    Rep Power
    24

    6050

    a blown exposure lamp will cause a blank copy on these machines.
    You have to remove the developer unit to get the drum unit out.


  3. #3
    Technician 250+ Posts
    Join Date
    Jan 2008
    Location
    The Dalles, or
    Posts
    409
    Rep Power
    24
    You have not given much info so pardon me but - first thing I would do is a sky shot and watch to see if the lamp comes on. No light - blank copy.

    Work on the 6050 almost weekly and do not understand why you cannot pull out the AP unit (drum section). Perhaps he was right in that you forgot to remove the developer assembly first. Once you get everything out of the way, the AP unit is held in with just 2 screws. When in doubt - RTFM.

    I would not suspect the drum though. Everyone has their own ways but I would check the scan lamp first. If that is working, then set your system to make several copies of your NAI test chart) - then after the first copy, pop the front door (stops the system). Remove the developer and look at the drum to see if it is being written on. Depending on the results, go forward/backward in the copy process (who'd a thunk I listened in class ;-).


  4. #4
    Game on mannu's Avatar
    Join Date
    Dec 2007
    Location
    kota , rajasthan
    Posts
    16
    Rep Power
    20
    remove dp unit and now u pullout drumunit .if carona wire is ok see the hvt unit ......

    • mannu

  5. #5
    Master Of The Obvious 10,000+ Posts
    Canon NP 6050

    blackcat4866's Avatar
    Join Date
    Jul 2007
    Location
    Lapeer, Michigan
    Posts
    15,222
    Rep Power
    245

    I'm with Iksardis on this one.....

    I'm with Iksardis on this one. Don't make this overly complicated.

    If the exposure lamp does not come on there is a problem in the exposure lamp circuit. This can be diagnosed easily. With the power Off & unplugged you can ohm out each component in the exposure lamp circuit. There is always 120VAC present at one of the lamp terminals, even when the lamp is off, even when the machine is off. You can tell by the arc marks on the side of my favorite magnetic screwdriver.

    Ohm out each component one at a time. As likelihoods go I'll lay these odds:

    1) 85% exposure lamp open
    2) 10% optical thermal fuse/switch open
    3) 4% lamp harness open
    4) 1% who the hell knows.....


  6. #6
    Junior Member
    Join Date
    Jan 2008
    Location
    Baton Rouge, LA
    Posts
    6
    Rep Power
    0

    Thanks Canon NP 6050

    Thanks for the amazing response!!! I am shocked at the fast results, I look forward to giving back in the future.

    As for this situation. I will go by the customers again on Monday, The lamp was coming on during the warm up cycle, but I did not specifically check while making a copy, so I know the lamp is good, still could be the harness or something.
    I did check the corona units both seemed ok wires not broken and clean.

    As for this so called dp unit - how do you disengage it. My Intrivia book said you need a special tool to take out the drum unit out is that correct?

    There is also a key counter attached to this machine that the customer wants removed, does anyone have the code to disable that?

    Thanks


  7. #7
    Technician 250+ Posts
    Join Date
    Jan 2008
    Location
    The Dalles, or
    Posts
    409
    Rep Power
    24
    Perhaps it is refering to the drum rotating tool. It is just a plastic knob that is normally kept in the waste toner area. We never use it as the drum shaft key should only be hand tight. Just use a rag to hold it while you unscrew (make sure the drum does not rotate counterclockwise).


  8. #8
    Tech Specialist 1,000+ Posts Canuck's Avatar
    Join Date
    Nov 2007
    Location
    Southwestern Ontario
    Posts
    1,477
    Rep Power
    42
    If lamp went,copies would be black at first,then blank when the machine does potential control.Turn off potential control in service mode then run a copy...start by re-wiring all coronas...you said both corona units looked ok...there are three on this machine....i've had the drum screw come loose(drum doesn't turn)and get blank copies.Check the developer drive gear...i've changed a few of them(Dev roller seizes and wipes out dev gears)


  9. #9
    Service Manager 250+ Posts
    Join Date
    Dec 2007
    Posts
    467
    Rep Power
    25

    key counter

    the key counter just unplugs, then you have to look at the schematic to see which wires are which to bypass. Usually there is a jumper on a connector that you pull off when you install a key counter. maybe you can just buy that from canon, then you don't have to fuss around with it.
    clarification "a connector with a jumper attached"
    I never saw anyone mention potential control. Maybe it has gone cuckoo and overriding the system. can turn that off to get rid of one more piece to the puzzle. Rare but..... also what if no transfer is occurring? Maybe pretrans is crapped out. seen that stop transfer current. remove and test. or just primary not engaged all the way in the plugs. then #4 from blackcat


  10. #10
    Tech Specialist 1,000+ Posts Canuck's Avatar
    Join Date
    Nov 2007
    Location
    Southwestern Ontario
    Posts
    1,477
    Rep Power
    42
    Do some trouble-shooting..shotgun approaches take longer and are more costly....check Vd and Vl in service mode..if Vd is way low,drum is not being charged(primary)..if ok and lamp comes on,Vl should be ok.If not, check potential control,optics obstruction. If ok,look at transfer currents in service,check transfer wire..pull the cover off the transport and run a copy and see if transfer corona wire glows..if ok,make sure drum is turning..if ok,check developer,dev drive...whats left?Before you do anything..turn off potential control and run a copy..if i get a blank copy call on one of these the first thing that i do is ask customer if copies were black before blank..if they say yes i bring a exp lamp in with me..black copies until machine does potential control again..then blank. 15 minutes of trouble-shooting is easier than 2 hours of shotgun blasts


Tags for this Thread

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