mx5500n

[glewisme]

I am experiencing erratic E7-20 codes. Of coarse it never happens when I'm there and it resets and may not return for two or more days. I have checked the LSU connections and performed SIM 61-1 and it all checks out ok. Now living here in Maine we do have some real power issues and of coarse there is no power suppressin or protection whatsoever.

[wazza]

Intermittant E7-20 can be caused when using different paper (eg heavy or Transparency) from either Bypass or trays 3 and 4.

There is a firmware upgrade for the PCU to eliminate this.

The PCU firmware should be: 01a10.D0 for the C-Dragons. There is also a PCU update for the Venus machines (MX6201 & 7001). The PCU firmware should be: 01a07.V0.

Update the main engine firmware first, then apply the PCU special edition firmware for the E7-20 codes if you dont have the very latest firmware yet (the new PCU version is available separately or included in the latest version).

I have done this to all of my C-Dragons and Venus machines. Have not had any come back with E7-20 since. Only ever happened occasionally to clients using heavy paper1 from the bypass tray I found. However, the bulletin states it can happen from other trays and using other papers as well.

I can send you the files if you have no access to them.

If still getting the error after new firmware, replace the LSU.

[glewisme]

Thanks Wazza,
Unfortunately I have upgraded the firmware to the lastest version,that's the first thing I checked and upgraded .

[glewisme]

Wazza,
I do recall that tray 3 and 4 are defaulted to heavy paper.Thanks for that tidbit of info.I set them to default to heavy paper because the end users aren't the brightest bulbs in the package.