mp 4001 toner issue

[Rickh200]

need some help please, i have a ricoh mp 4001 that after toner was replaced still saying toner depleted, how does this machine sense toner?

[slimslob]

Check the toner bottle tray and the toner entry chute on the PCDU for clogs or obstructions

[sandmanmac]

Check the toner bottle tray and the toner entry chute on the PCDU for clogs or obstructions

Agree.
Was the bottle you replaced empty?
If so, there's a god chance the plug from the top of the bottle is still in the toner hopper and blocking the flow from the new bottle.
If not, then probably either a toner sensor, or toner adding problem

[DDlan]

need some help please, i have a ricoh mp 4001 that after toner was replaced still saying toner depleted, how does this machine sense toner?

what u use toner? the counters of drum and dev.

[Oze]

I've had to replace a density sensor for this issue in the past.
It's an awful job too.
density sensor.JPG

[withnail]

Strip the toner hopper and check the 4 mylar paddles haven't come unstuck