Canon IR C3480i yellow back ground.

[Desert Rat]

I haven't seen this unit yet, just hoping to get some advice before I see this machine tomorrow?
I only have a couple of these in the field so I don't get a lot of time on them.

Thanks

DR

[roho]

Likely a drum unit. Check the life of the drum in service mode, I don't think they usually last much over 100.

[Desert Rat]

Thanks again Roho,
That was my first thought as well. Someone emailed me a sample and I would
have to agree it is probably a drum. May need the magenta drum also.

Thanks

DR

[roho]

Quite likely, usually when one drum goes the others are right behind, I hate it when someone replaces one drum only, then two days later i'm driving to the same customer. Check the life counter, it's not a perfect barometer, but if their all close in count, you can expect further issues soon. Also check the firmware version, if it's not at 73 or higher( somewhat guessing the version), or you may get a user error message when the K drum is replaced. It's been three years since I've seen one, think the message tells you to insert K drum.

[teckat]

Agree 100%, u need to replace all drums at same time in this iRC series.

It's from a lessoned learned right from the start and debut of series.

The drum % use shown in this iRC series means nothing, only reflects 5/6% total coverage on Letter size.
If one customer runs 10,0As 00 Letter color at 40% coverage__& other customer runs 10,000 color at 6% Letter coverage, Drum Counter %'s shown will reflect the same in menu.
When this series was popular, u had too know what your customers what printing.

Had customers that only used small amt of color on just it's letter head. (less than 1/2 % ) they could run drums until 200/250% use shown with no errors in color or toner dropping.

[Desert Rat]

Thanks for the info. I'm not sure of the job flow on this particular unit.
Any chance of changing the chip on the other drums to reset them if only one is replaced?
I'm guessing not? I'm guessing that the counters for the drums are controlled by the chips?
Probably the same for the developers also?
I need to think about this model and look through the svc manual.
Replacing all the drums when only one is having the problem will get
very spendy for me fast.


Thanks again,
DR

[teckat]

This device does not have memory in the drum unit, when a new drum is mounted, the drum life counter value stored in the printer needs to be reset.
The device detects old and new drum units, so that the counter can be reset.

The detection is performed by the DC controller CPU monitoring the fuse detection signal.
When the CPU detects that a new drum unit has been mounted, it outputs a fusing signal and blows the fuse on the drum unit. At the same time, the drum life counter resets to 0.

1. Time of Detection: at power-on, after the front cover is open/closed

Note:
Do not replace drum units with new ones unnecessarily, in order to check function operations during service, etc. The device blows the drum fuse as soon as it detects a new drum unit and resets the drum life counter to 0. Even if the old drum is replaced immediately, the drum life counter will increment as a new drum unit.

In Service Mode COPIER>FUNCTION>INSTALL >AINR-OFF invalidates drum initialization that is performed when a new drum unit is installed. Also, the fuse is not blown, as it would usually be after drum initialization is complete.
This mode would be used to replace a drum unit temporarily in order to check image quality, for example trying to trace the cause of the problem.
0: Initialization carried out for new unit. Fuse blown (Default)
1.: No initialization for new unit. Fuse not blown.

Further, this service mode should be set to [1] only when necessary for service. After the service is complete the setting must always be returned to [0].

[Desert Rat]

Teckat,
Thank you for multiple pieces of the puzzle. I have always found your advice to be spot on.
From this I gather that the chip can be replaced? I see this a limited use of a used drum
to avoid an over nite ship charge or to delay replacement.
I will contact that customer for a status update.

Thanks

DR