KM 423 Jam Code 30-01

[copierwhisper]

I have a KM 423 with frequent/intermittent jamming problem (every 10-100 pages)
The jam is J 30-01 the paper jams in exactly the same place every time but my problem seems to be deeper than the usually issues.

Each time the jam happens only from Tray One A4 (portrait orientation) and no other way,
Every time the jam happens I clear the paper and it tells me to re-size my paper in tray one (checked all machine/paper settings they are all correct)
when the paper is re-sized the job runs again but jams almost immediately and will continue to do this until the orientation of the paper is changed or the tray is switched.

now here is the bit i am getting stuck with, the parts i have changed on this machine are as follows:
Tray 1 and 2, Feed unit 1 and 2, The PRCB, Exit Section, Fixing Unit, Drum/Dev Unit, Entire Duplex Section, Main Motor (M1), CL1 and the Entire Tray 1 and 2 Drive Assembly's (including both the paper size detection assembly's)

I have also updated the Firmware but still no change.

[Synthohol]

one of our guys has the same EXACT issue.
the DSM is supposed to come look at it. ill post his findings if you dont find a solution by the time he arrives.

[BR549]

Is your paper A4 or letter? I thought A4 was not available in the US. If it's letter, it should say letter, not A4.

[Synthohol]

i have a few accounts that use A4, they receive files and faxes from overseas.
not totally unheard of thats why i didnt question it

[D_L_P]

I once fought a J30-01 on a 423 with very similar symptoms. Turned out to be removing all the wire ties behind this cover:
j3001.jpg

It was a fairly new machine ~50,000. I had replaced the fuser, feed rollers, exit unit, etc. What lead me to the wire tie was disconnecting that harness (and manually catching every page as it came out) allowed me to run +1000 without any jams. Plugged it back in and got 1 jam every 100 copies or so. GL

[habik]

I once fought a J30-01 on a 423 with very similar symptoms. Turned out to be removing all the wire ties behind this cover:
j3001.jpg

It was a fairly new machine ~50,000. I had replaced the fuser, feed rollers, exit unit, etc. What lead me to the wire tie was disconnecting that harness (and manually catching every page as it came out) allowed me to run +1000 without any jams. Plugged it back in and got 1 jam every 100 copies or so. GL

Nice catch! Thank you for sharing.

[copierwhisper]

Thanks everyone for your feedback! I will take look at the wire harness today! Any additional thoughts are welcome, this is a weird problem for sure!

[Synthohol]

DSM suggested the paper size sensor board and the 1 spring that is missing on the clear guide to start.

[allan]

Same problem drove me insane. Fixed it with out knowing the cause. I will have a look at the wire ties next time, thanks.

[copierwhisper]

I replaced the paper size senor board and ensured both springs are secured on the clear guide- same problem....no change.