KM4035 jam 00 then system error 4200 after clearing jam

[bilyahn]

This problem initially started a few weeks ago. Random jams that client would clear and power cycle then unit would work fine for a week or two. Looking at it today and jam code is 00 which I can't seem to find a reference to in the SM. Jam does not always stop in the same location but jam code is always 00. After clearing the jam and closing up the machine it instantly goes to the message cycle power on/off 4200 system error. Cycle power and you can get a few copies before it does it again.

I haven't done much since the manual seems to point to either a main board problem or laser problem. What I have done is cleaned and reseated connections and reinitialized system settings using sim U020. Didn't help with the problem.

Unit has 1.3 million copies on it so we are just thinking of retiring the unit but would like some input from here to see if I am missing something. Any and all suggestions would be very helpful.

Thank you in advance for your time and effort in this matter.

Bil

[Tonerkiller]

The charge is arcing. Clean the machine and replace the charge wire.

[blackcat4866]

That's correct. In this order:

1) Primary charge short
2) Door interlock switch problem
3) Laser

=^..^=

[Geo]

If the 4200 code was caused by the charge corona , don't be surprised if you will have to replace the drum due to pinholes (fine dots on output)

Good luck

[bilyahn]

Thank you for the quick response. Going back on Monday so will let you know how everything turns out.

Bil

[bilyahn]

Thank you everyone for the spot on advise. Replaced the charge unit and whammo everything works fine!

Bil

[blackcat4866]

This also happens on the FalconI, FalconII, FalconIII, HarrierI, and HarrierII. Primary charge problems present as laser code. =^..^=

[bilyahn]

That's odd that they don't mention that in the SM. Or is it covered in a tech bulletin?

[blackcat4866]

The HarrierI series has a bulletin out with a modified laser unit harness for the C4200. I think this was a mis-step though since I've never had to change one of those harnesses. The Harrier is known for arcing at the developer bias terminal, or arcing at the transfer roller terminal, or shorting at the primary. The funny thing is the lack of consistency.

For example: the transfer roller contact must have conductive grease or it begins to rust immediately. But if you put conductive grease on the developer bias terminal it will give you intermittently faint copies in bars crossfeed. The bias terminal has to be dry, then it wears down. I threw a developer bias terminal in with every other PM kit. Also the post-transfer guide has a coated surface that can wear through and give very similar results. Any one of these can give you the C4200, and it doesn't always look like the other error messages. Sometimes is appears in a very tiny font in the upper corner of a blue screen.

If there is a bulletin I'm not aware of it. =^..^=

[bilyahn]

Great information. We only have about 20-25 of these machines to worry about but they keep throwing new and unique problems everytime. At least their unique to me!!

Bil