MX-M465N pour half tones

[TechGeek]

Working on a MX-M465 with intermittent pour half tones. When printing 1 self test 64-05 looks OK. If I print 25 64-05 the 25th page starts to show signs of the half hones becoming splotchy and blurry. If I print 50 64-05 by the 50th the prints are even more splotchy and blurry. The same phenonium happens more rapidly when copying from the glass. I have been dealing with this issues for about a year and a half. Sharp tech thinks it is a memory issues.

I have replaced the entire DV unit along with the DV
The complete Drum Unit with new drum
the whole Transfer roller assembly not just the kit
MFP board
PCU board
Scanner board
added Dimm memory to see if any changes.

i have messed with all the sim 46 exposer settings and will look good for the first few pages but eventually returns when printing multiple pages at one time. its almost like the the developer is not getting enough toner or is not being refreshed frequently enough. does anyone know of a sim that can be used to adjust the developer refresh rate?

[spanky]

Re: MX-M465N pour half tones

Try cloning the machine and backing up all settings then reset it to factory defaults.

After that you can reinstall the cloned and backed up files.

I had a similar issue and that fixed it.

[sharptech]

Re: MX-M465N pour half tones

The MXM465 has a toner add magnetic clutch. As you did not mention it in your post I would take a look at it. Maybe it is slipping ?

T.G.G.

[Hansen88]

Re: MX-M465N pour half tones

I find this same issues with a lot of machines in this family. I have tried replacing all the parts mentioned with no real help. One thing I found that has helped most of my machines is to get into 46-19 and the AE-stop-copy change from stop to prescan. I dont know what it does but it really improves the quality a lot in my experiance.

[copiertec]

Re: MX-M465N pour half tones

Try cloning the machine and backing up all settings then reset it to factory defaults.

After that you can reinstall the cloned and backed up files.

I had a similar issue and that fixed it.

Spanky, when you clone the machine where are you saving it, too? USB stick?

[copiertec]

Re: MX-M465N pour half tones

I always had the same issues with the 3 (MX-M363N- M503N) series mono as well. Poor half tones even after replacing developing units, drum units, transfer rollers, etc. I got to the point where is the client did not mention anything about copy quality, I just let it go until next PM.

[spanky]

Re: MX-M465N pour half tones

Spanky, when you clone the machine where are you saving it, too? USB stick?

I usually backup to my laptop.

Be sure you clone and also do the storage backup, this will give you all settings.

Don't forget to printout the network settings so you have the IP address to reinstall, the rest of the network settings will be in your backups.

[Prints Charming]

Re: MX-M465N pour half tones

Firstly, make sure the PCU firmware is at least 0326o100, as this version corrected several High Density and Procon issues. Very important.
Clean the Procon Sensor and perform standard calibration procedure.
If issue continues, you can adjust 44-28 HT_DIF to a lower value such as 30 (default 60). You can also change the default Procon timing in 44-62 Procon Target ID Up and Procon Mode High Quality +2.
The device performance will change slightly, but not enough to cause any concerns. You're just forcing a more frequent Process Control adjustment.
Also, make sure you're using genuine supplies. Have seen this with non-genuine toner despite how many forced adjustments you make.