Sharp MX-M465 Overtone

[havokprod]

Hey guys Is there some sort of manual toner concentration adjustment that I haven't seen on B&W Sharps?


I have a MX-M465 that is over toning on me. I replaced the DV because it was close to end life 480K. It held for about a week. When I came back it was saturated in toner. I ran 7-1 aging DV check disable and purged the machine enough to maintain good quality but no background, then I cleaned the machine. After cleaning and running all the adjustments what it does is it will run 30- 50 prints (5-7% coverage), adding toner every 4-6 prints. Then it stops the screen says adjusting quality and just adds toner like a mad man and over saturates again. Rinse repeat.




I loaded and fired the parts canon on this machine. New DV Unit, new DV, new DR, new DR carriage New T/S unit, New toner. All OEM. I replaced the HVPS board, cleaned the main drive unit made sure my bias spring, connector and cable were good. Checked the resistance at the DV unit mag roller with dv in it all the way to the HVPS less than 1 Ohm. Made sure the laser slit glass was clean. I even replaced the MFP PWB from a known working machine.


I ran all of the adjustments: 8-2,8-1 for the HVPS. 25-2 for the DV. 44-2, 44-27,44-6, 44-26, 46-74 for the image quality. Reset counters and even did 63-2 shading and 66-3 SIT just in case.


Ended up swapping the machine out for another one. So its here at the shop and I don’t like it getting my butt handed to me, so I wanna fix it. Any Ideas?

-havokprod

[Hansen88]

Re: Sharp MX-M465 Overtone

I have seen the toner add clutch in the back of the machine cause problems,mostly undertoning but maybe the clutch is not disengaging causing overtoning?

[DAKOTADAN]

Re: Sharp MX-M465 Overtone

I have seen the toner add clutch in the back of the machine cause problems,mostly undertoning but maybe the clutch is not disengaging causing overtoning?

After changing all those items and doing all the adj, and it still over tones, I would back up the address book and IP address, and do a sim 6-90, and reload the firmware, which sets the machine back to factory resets. Someone may have changed some vital settings that affect the toner density.
You have nothing to lose at this point.
Good luck.
Dan.

[havokprod]

Re: Sharp MX-M465 Overtone

Thanks for the replys. I checked the clutch, it's working fine. Tossed a new one in, same thing. Isn't 6-90 just to lock the scanner for transport? I did reflash the firmware in CN mode.

[ihatefinishers13]

Re: Sharp MX-M465 Overtone

Thanks for the replys. I checked the clutch, it's working fine. Tossed a new one in, same thing. Isn't 6-90 just to lock the scanner for transport? I did reflash the firmware in CN mode.

I know I'm late to the party, but we had this on the 4140-5141 series with the toner cartridge causing the issues. At the time, non-OEM toner, and as soon as you put the cartridge in, the machine would forcibly add toner until an f2-40(i think) code popped up. Had to swap the cartridge, and then either run sky shots to empty the DV unit back to normal levels, or replace the DV.

Also had a DV unit that was doing the same thing, it wasn't moving so the machine added toner until it coded out again. Hopefully this helps someone!

[bigdaddyooo]

Re: Sharp MX-M465 Overtone

Did you replace the 560TU or the entire unit? It has a sensor just under the roller that goes kooky once in a while and will cause issues like that.

[havokprod]

Re: Sharp MX-M465 Overtone

Did you replace the 560TU or the entire unit? It has a sensor just under the roller that goes kooky once in a while and will cause issues like that.

So yes I did replace the enite unit.

[havokprod]

Re: Sharp MX-M465 Overtone

Follow up,

I was able to "solve" the issue, it took some hackery but I'll share what i did now. I activated toner save to level 1 for both print and copy, level 2 and 3 removed to much image quality for my liking. Also and most important I upped the DV bias in Sim 8-1 to +20 points from the HVPS stating point and upped the grid voltage in Sim 8-2 to +10 points from the HVPS staring point. I have been using these settings on other machines in the field that seem to me to be running a little rich (to much toner ) and can I can report back that they running leaner and more importantly cleaner. The series of machines im using these setting are the Orion IT (MX-M365, MX-M465, MX-M565) i'd be curious to see if they work on the newer B&W 50,51,70,71 series copiers, I suspect they would. They use the same toner (MX561NT) same DV (MX561DV) and drums (MX-560DR). If anyone trys this let us know.

[fireater]

Re: Sharp MX-M465 Overtone

I have seen the toner add clutch in the back of the machine cause problems,mostly undertoning but maybe the clutch is not disengaging causing overtoning?

their was a bulletin about that too i think

Bulletin Number:	MFP-TB-1036
Bulletin:	Modification of a Clutch in Main Drive Unit
Factory Number:	ARE-1144
Solution Summary	A clutch in Main drive unit rotates along with Toner hopper drive gear due to the rust on the clutch etc. It causes F2-40 error on rare occasions. The spring type clutch has been changed to torque limiting clutch to remedy the defect.
Creation Date:	10/15/2014
Expiration Date:	1/1/3020
Models:	MXM364N, MXM365N, MXM464N, MXM465N, MXM564N, MXM565N
Priority/severity:	High
Description:	Modification of a Clutch in Main Drive Unit
Category:	Technical Bulletins

[havokprod]

Re: Sharp MX-M465 Overtone

Thanks for the input, I do remember replacing the E-clutch that activates to start feed toner sequence, and when I disassembled the main drive unit to check my Bias spring, DV unit connector etc, I did remove clean and regrease the torque limiting clutch. like the one in the picture.ARE 1144 Modification of a clutch in the main drive unit.pdf
20231011_143749.JPG