Hi guys.I have a canon irc3380i with faint copies.The drums are all new and I fitted a transfer belt from another m/c that I knew was working.If I run a pg 5 and jam the m/c the image on the belt is fine.I have never had a problem with the transfer roller but I feel the fault is in this area.Anyone seen this.?
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i assume u have done full autograd? -
have tried that but no difference.Comment
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If you say the image is fine on the ITB, which will be kind of hard to determine the density on a black flim like belt. If you thiink the image is fine on the ITB, then yes you could have a problem with transfer.
Can you post a image of the fault. What's the meter on this unit?Comment
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Hi screwtape,There is only 130k on the m/c.When I ran pg 5 I had the density set at the highest setting and there is a strong image on the belt.(only used black and magenta as test.)Also I checked image on the belt when doing an auto grad and that looked fine.This m/c isn't one that I service normally and that doesn't help either cos I'm relying on the guy that does service to be honest in what he has done already.Have you had any issues with the rhs door assembly.? I am going to have another look tomorrow and maybe try that next.Comment
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if image on belt is fine i would be looking at secondary transfer roll,external on the door.Comment
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When making copies the image is good on the ITB Belt but the finished copies are light or washed out.
Check the Bias Tabs on the ITB Belt assembly and the Secondary Transfer Roller. They may be bent or broken and not making contact. Repair or replace the contact that is broken.
new3380..jpg2new3380..jpg**Knowledge is time consuming, exhausting and costly for a trained Tech.**
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image is light and washed out overall.
In the past, this issue has been resolved by securing the ground for the ITB. Ensure that the ITB ground wire is firmly attached at HVT2 and the grounding screw at the ITB frame.
IMG_7404..jpg**Knowledge is time consuming, exhausting and costly for a trained Tech.**Comment
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Also check contact for the secondary transfer roller it must be touching the transfer roller shaft. /contact should be touching the bottom side of the shaft of the secondary transfer roller.
Remove the screw and then remove the black plastic contact holder shown below.
ir3380contact1..jpg
Verify that the contact is touching the bottom side of the shaft of the secondary transfer roller as shown in the photo below. If it is not reform the contact so that it is touching the shaft.
ir3380contact2..jpg**Knowledge is time consuming, exhausting and costly for a trained Tech.**Comment
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I checked all contacts and even replaced rhs door.Also I reseated connectors on the boards + replaced the voltage board for secondary transfer but still the same.Comment
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Is the ITB cover assembly latching down properly?? Early builds on these machine had problems with the ITB assembly not latching down properly...Canon modified the assembly now but i've had the hook break and you get light image on one side. I tie the broken ones down with a tywrap.....common problem when machine was first launched.Comment
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The itb is closing correctly.I am going to change the connector at the rear of the process unit and the dc controller at next visit cos at this stage I can't think of anything else.Bloody canon m/cs.Comment
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Last edited by teckat; 03-21-2010, 02:59 PM.**Knowledge is time consuming, exhausting and costly for a trained Tech.**Comment
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Canon release 2008
Measure to Prevent Light Images that may occur when the
Lock Lever (Front) on the Transfer H.V. PCB is not locked
The image density is light.
<Cause>
Even when the lock lever (rear) on the transfer H.V. PCB is locked and the lock lever (front) is unlocked, the process unit can be housed in the machine and become operable: however, if images are output in this locking condition of the levers, a gap is provided between the drum and the intermediate transfer belt, causing light image.
The shape of the lock lever (front) has been changed so that the lock lever (rear) is not locked until the lever (front) is securely locked. With this change, the shape of the frame internal cover (front) has also been changed.
If the symptom above should occur, replace with new type lock lever (front) and the frame internal cover (front) at the same time. Alternatively, replace the frame internal cover (front) and the transfer H.V. PCB at the same time.
If the new type lock lever (front) or the transfer H.V. PCB is attached to a unit with an old type frame internal cover (front) attached, it may cause the interference of the lock lever (front). Follow the description in "Servicing Work" above and be sure to replace the parts at the same time as instructed.
COVER, FRAME INTERNAL, FRONT
Old
FL2-4451-000
New
FL2-4451-010
LEVER_LOCK_FRONT
Old
FC7-4126-000
New
FC7-4126-010
TRANSFER H.V. PCB (HV2)
Old
FM2-5558-000
New
FM2-5558-010Last edited by teckat; 03-21-2010, 06:42 PM.**Knowledge is time consuming, exhausting and costly for a trained Tech.**Comment
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How are the test prints?
Error :
Symptom was network printing and scanning output was washed out. Internal print quality was fine.
Workaround :
Problem was resolved by clearing MNCON and the copy quality came back close to normal 90% then performing a full gradation adjustment and the copy quality came back 100% to normal.Comment
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