mp6001 sc300

[banginbishop]

have a m/c doing this. ordered a new main charge and power pack. any other ideas for this, ive checked goose and door switches etc but its giving a grey copy and no image at all. tried a sky shot but again a light grey image. ran vsg and that sits at 4.07v, vsp is at 5v and wont move and the drum is covered in a grey film which i suspected might be an earthing issue? grid voltage is cant rmember to be prescise at 700-900v. m/c has done only 600k and its 50k off a 300k pm. i suspect its the main charge but i wanted to narrow it down to either the power pack or the charge itself - i dont like guessing on faults if i can really help it.

[kannuki2]

Re: mp6001 sc300

i've had similar issue.. it turn out that the developer is dumping toner on the charge corona grid.. SC300 can be cause by dirty charge grid... check that before replacing the charge power pack.

[tinnyjay]

Re: mp6001 sc300

have a m/c doing this. ordered a new main charge and power pack. any other ideas for this, ive checked goose and door switches etc but its giving a grey copy and no image at all. tried a sky shot but again a light grey image. ran vsg and that sits at 4.07v, vsp is at 5v and wont move and the drum is covered in a grey film which i suspected might be an earthing issue? grid voltage is cant rmember to be prescise at 700-900v. m/c has done only 600k and its 50k off a 300k pm. i suspect its the main charge but i wanted to narrow it down to either the power pack or the charge itself - i dont like guessing on faults if i can really help it.

I am very experienced about Ricoh AF,MP machines.
Ricoh almost at all mid and high volume machines has the same isuses,but translated in diferent codes in diferent machines.
If you have sc300 even if this corona has made only 50k copies,it means you have some problems with cleaning(not even power pack).
Remove corona,remove grid and clean with alcohool the wire,carefully but clean it well.Try to clean the grid very carefully and try to follow lines of surface when you clean it.But you can think that corona has its corona wire cleaner to do that.No,thats not possible if your filters on toner hoper are too old.So,first change filters,and think about changing developer if it is too old,because if developer is too old,the density of developer in developer unit,is smaller than normal and the magnetic power between drum and magnetic roller,has not possible to take all discharged toner from mag rollers and some of it,can fly free inside machine.As about your grey background i think it is caused by corona,but you must remove drum unit to see discharge lamps are cleaned and to see if drum cleaning blade is cleaned in upper side,not in the side of cleaning,because sometimes toner gathers between drum and drum blade and can make dirty drum each time it rotates.
I think i could help you with this.
Bye and keep us updated with ur prob.

[Tonerbomb]

Re: mp6001 sc300

have a m/c doing this. ordered a new main charge and power pack. any other ideas for this, ive checked goose and door switches etc but its giving a grey copy and no image at all. tried a sky shot but again a light grey image. ran vsg and that sits at 4.07v, vsp is at 5v and wont move and the drum is covered in a grey film which i suspected might be an earthing issue? grid voltage is cant rmember to be prescise at 700-900v. m/c has done only 600k and its 50k off a 300k pm. i suspect its the main charge but i wanted to narrow it down to either the power pack or the charge itself - i dont like guessing on faults if i can really help it.

Sounds like your all over it banginbishop. I always start with the corona unit first then go to the powerpack. for vsp to be 5 volts the drum really should be bear of any toner though.Bad drum ground should show some other symptoms also.

[tcs04]

Re: mp6001 sc300

Bad drum earth would give a pale copy (write to black) but I wouldn't expect toner on the drum. What's the VT reading (SP2223)? Seems more likely the charge isn't reaching the drum which would tally with SC300.

However, it is possible that if the machine has been run for a long period on short runs with poor earth the dev has overtoned due to a pale vsp patch, but you would have very low VT (High toner to dev ratio), this would lead to the overtone on the drum and possibly puffing toner onto the charge.

Check the resistance between the drum shaft and ppack terminal connector. If it's up at about 8 ohms or more, clean the discharge brush and retest. When the shaft is ok, you may need to change the dev if VT is very low (below 1.0), I would follow the lead from another post and place paper between the toner hopper and dev unit to make sure no toner drops during setup and also remove the hopper drive gear. Also make sure the front door is open when you turn the machine on after fitting the dev.

Check VT

Run SP3001-2, then run 10 white sheets and check vsp/vsg.

Print 1 counter list, check the solid.

You should have a better idea from these readings what the issue is.

Good luck!

[banginbishop]

Re: mp6001 sc300

update, i didnt go back untill today for another problem but the cure was a brand new corona unit i ordered (complete) fitted by another engineer.

[Herostrat]

Re: mp6001 sc300

Cleaning corona with tweezers is MUST on service on this machines for us...it's tricky,it can snap just like that...I have spare one just in case but that's about it,run tweezers on wire to scrape the filth.
Not shure about SC 300,it gave me SC wen I had some probems wit connection.

[kannuki2]

Re: mp6001 sc300

corona wire, cleaning pads, charge grid only costs a total of $1.35. Why clean? It takes only 5 mins to rebuild those parts.