Had a 400 making grainy spots where random toner was being slung around. Upgraded firmware set sim 147 'set operation mode' to a 1 and replaced K dv unit, no return.
Had a 500 doing similar but the more pronounced problem was grey banding from front to rear (not lead to trail) when printing K only, not process black. Everyone and their brother said it was the K drum, swapped with the Y, still had the problem. Replaced transfer belt, no return.
It would REALLY BE NICE if Kyocera would give detailed descriptions on how **** works on these machines so we can quit guessing!!! HELLO! ANY REPS LISTENING????
Ricoh has VERY detailed descriptions on how charging is done, transfer, toners sensors and how they relate to different service modes. How to check service mode voltages and relate them to over or under toning, cause and effect.
Granted Ricohs work a little different with respect to Vsp, Vg, etc, It would be nice if we could access sim XXX sub X and tell that the hell was going on with each color developer, bias, etc and what changes do. Sim 147 has all kinds of useful modes for 'setting for toner applying operation', they are kind enough to give you initial settings and a setting range. Unless I missed the decoder ring at the end of class what the hell does any of this mean?
A detailed description of what everything in sim 147 would be nice since you are suppose to set 'set operation mode' to 1 after flashing firmware 8.0 and above. Ok...WHY?! Tech support or my regional rep telling me this doesn't help explain the cause and effect of the action other than, 'we said do it'.
Am I the only one that thinks the current batch of service manuals aren't worth wiping your ass with? I digress, it may simply be the Japs not wanting us lowly technicians being privy to this information. If so they do us all a disservice (at least those of us that are more than parts swapping monkeys). I'm sure this rant will piss off certain reps that lurk here, sorry, tired of guessing how to fix the current line of color product due to lack of information.
I chuckled when Keith McManus said the Kyoshiba 750 manual was overwritten. Toshiba has some of the better manuals as far as I'm concerned. You can actually sit down and read work flow within circuit board and understand where problems are likely to originate instead of replacing multiple boards and crossing your fingers. No disrespect to Keith, I wish I could spout off half of what he knows without having to gather my thoughts beforehand!
Okay, I'm done
Z
No HOPE, just BROKE. Anyone else - 2012
