Ricoh Aficio MP 9000

[tgilani]

i am facing problem in Aficio MP9000
after 120000 copies Image becomes light, image gets light like very less toner in developer. When we recover the Toner by "Toner Supply"(forced Toner Supply), machine gets normal but after 1000 copies it
gets light again.i try switch the machine from Sensor Control to Image Pixel Count Mode, machine performs normal about 7000 copies. After that it gets light again.
I observe that the hardware (Toner Supply Motor Clutch) is operating normally more over i have updated the Engine Firmware with the latest available
(3.22.1:16)

But still the problem remains same

then when i replaced the DEVELOPER & TD SENSOR machine perfumed normal for approx another 100K to 120K copies, after that image get lighter again

looking for solution

[RebelPhoenix]

Hello Dear,

Do you test the Toner Bank Setup ? If this process is Failed. You must clean the Toner collection tube. If This process is Complete. It's time your machine get the toner at toner bank.

[Cipher]

I would try adjusting the toner supply rate SP2209.

[iMind]

Try to vacuum out the tube thats on your left hand side near to the flywheel that goes up to the development unit, this tube thas the tendency to coagulate and gives you bad quality copies, light copies or SC495 after 100K

[tgilani]

tubes has cleaned twice
toner ratios has tried to be adjusted
toner hopper has been cleaned
problem same

[fareeduddin ahmed]

reply

hi dear

you have this problem due to blockage of toner feeding

1) All pipes you have to take them out and clenead well


2)the pump wich is going to supply toner also to be cleaned well


this problem noticed due to abnormal room tempratrue some place due to heat and some places due to high cool

if you work on this poins you will get back good results

[jaredfmn]

there have been so many revisions to the dev unit, i had a coworker with the exact same issue, turned out to be the dev unit,

[cobiray]

Have you tried cleaning the mag roller and doctor blade?

[meno]

Light copies

Cleaning the dev mag rollers can resolve those problems only if you clean all the grooves also. I use a brass brush (like the ones sold to clean a barbecue grill). Toner clumps up in the grooves and causes reduction of density. Also if the rollers are discolored (coating on them), there can be a gray background on the operator side edge in long runs. The first copies out appear to be ok, but in about 25 copies the background starts. This is most definately dirty/ glazed mag rollers. If it has gotten to the point of making a toner cloud when you turn the mag rollers by hand, the developer is crashed due to too much toner in the mix. Then you will need to change the developer in addition to cleaning the mag rollers.

With the formulation of this developer and other modifications in this model, Ricoh has resolved the plugged doctor gap from paper dust. I have not seen any trouble which was experienced in the previous models with this engine.

As a general rule, I check the mag rollers on all calls and clean them if indicated.

[Llama God]

I'm not too familiar with this model, but do the toner pumps go on these? They did on the 10515s and 9005s I believe, causing fading prints.

[tcs04]

Remove the dev unit and check for toner in the entrance to the toner hopper. if it looks full the Toner Supply (Hopper Drive) motor is probably the cause of the problem.

Check if the drive on the Toner hopper turns ok by hand and that the toner (if the Unit looks full) moves away from the opening. If It's tight, change the hopper.

REMOVE and check (By Hand!)the Toner Supply Motor (directly to the left of the Dev Drive Motor on the large bracket) These can fail and may not produce a code.
This motor drives the toner hopper and so the hopper will remain full, but not feed toner to the dev unit. the toner end sensor will see toner at the hopper entrance and the copies will decrease in density.

My money is on this motor! we have changed 2 (One last week!), both at about 1 million. You can test the motor in SP5804 but they run quietly even when faulty!! The motor will turn but the gears and belt on the back of the bracket won't!!!
Also, I believe they will not run with the dev unit out of the machine and the front door open so you can't test tham that way!

Check the output of the TD sensor (SP2223? High = low toner) and I.D (3103 Patch high?).

If the above doesn't work

Check the toner tube which runs behind(?) the Toner Pump Motor (Extreme top left corner) just before the connection to the back of the pump assy. See page 6-102 of the service manual, the tube can be seen in the bottom diagram entering item J (Toner pump).
This should have been modified since early MP1100 models but may restrict toner supply if there is a kink in the tube. This would eventually lead to SC495.

This model will tend to produce pale copies if there is a failure in the system due to the way the detection works, calling from the dev unit instead of forcing from the toner bank, which used to produce SC495 and damaged coils on AF2090, so at least there should be no mess!

The only other thing I can think of is poor drum earth, which would produce pale copies on this range.

Hope this helps.

[Shadow1]

I just ran across the same problem on a MP1350 - looks like it is the drum ground in my case. Check very carefully, because initially mine was reading about 10 ohms, but when I started rotating the drum it would be several K at some points. This machine has 3.6M on it.

[jarhead2020]

I would check the toner supply motors, take off the right side and rear covers and verify that toner is making it up the long diagonal tube up to the DV uinit, we had one go out on one

[tcs04]

I just ran across the same problem on a MP1350 - looks like it is the drum ground in my case. Check very carefully, because initially mine was reading about 10 ohms, but when I started rotating the drum it would be several K at some points. This machine has 3.6M on it.

Just had an AF1085 doing much the same, have ordered the hub for the drum as the bearing has high resistance. It can just be a dirty drum shaft / electrode plate (B234 2360 on the MP9000 etc). This "plate" (Discharge brush) takes a fair amount of the load and can cause the problem.

[imaginemoko]

how old was your OPC? after cleaning the tubes and cleaning the mag roll.... same problem? have we checked the toner hopper if the auger properly rotating and droping toner to the dev unit!