MP 8000 Add Toner

[CableGuy]

Hi all.

Once again I have to turn to the masses for help with a problem. I have a MP 8000 which is asking for toner. I initially found that it had in fact over toned itself. I cleaned her up and vac'ed out all the excess toner lying around the drum unit and stuck it back together. After a minute or so, it stopped asking for toner and made copies. These copies were very over toned. I made about 100 test chart copies without the toner bottle in and got it back to normal. I did the ID sensor initialise and made a few copies with the toner bottle in this time. It was all looking good.

Just about to pack up and leave and I noticed the little add toner symbol, bottom left on the screen. I opened and closed the door and it came up with the 'adding toner' screen. 2 hours later I was no better off. In desperation I did a 'TD initial setting'. This ended with SC342-TD sensor adjustment error. This led me to believe that the TD sensor has expired.... I tried switching to pixel mode, but could not get the machine to forget that it wanted toner.

So I've ordered the TD sensor. I was wondering if any of you have had a similar problem and any pointers on why the pixel mode won't work?

Many thanks in advance

[Jomama46]

Hi all.

Once again I have to turn to the masses for help with a problem. I have a MP 8000 which is asking for toner. I initially found that it had in fact over toned itself. I cleaned her up and vac'ed out all the excess toner lying around the drum unit and stuck it back together. After a minute or so, it stopped asking for toner and made copies. These copies were very over toned. I made about 100 test chart copies without the toner bottle in and got it back to normal.At this point you should have pulled the pcu back out and cleaned the ID sensor again. I did the ID sensor initialise and made a few copies with the toner bottle in this time. It was all looking good.

Just about to pack up and leave and I noticed the little add toner symbol,pixel mode just changes the the bottom left on the screen. I opened and closed the door and it came up with the 'adding toner' screen. 2 hours later I was no better off. In desperation I did a 'TD initial setting'. This ended with SC342-TD sensor adjustment error. This led me to believe that the TD sensor has expired.... I tried switching to pixel mode, but could not get the machine to forget that it wanted toner. pixel mode just changes the toner clutch on time, it wont forget that the machine hasnt recovered from toner near end.

So I've ordered the TD sensor. I was wondering if any of you have had a similar problem and any pointers on why the pixel mode won't work?

Many thanks in advance

take a bag of developer back with you and 1) clean the id sensor, 2) replace the td sensor, 3) replace the developer, run 2801, 3001.

[CableGuy]

Exellent, I will give this a go when the TD sensor arrives. I had the drum out 3 times giving it a clean each time, but I guess if the TD sensor is knackered it won't give me any joy. But as a matter of course, I'll give it one more go.
Thanks for the advice

[CableGuy]

Result

Just wanted to give you an update on the conclusion to this fault, well they haven't called back yet anyways.
I replaced the TD sensor this morning, ran the TD initialize which failed on the first try, SC342. Ran it again, this time it worked. It was still asking for toner though, let it run and it came around. Made a copy which was very overtoned. Removed the toner bottle and made 10 sky copies. Then ran the TD initial again. Did this a few times, until it came down to an acceptable level (popped the toner back in at this time). Ran a few jobs and the toner light came on again, but only for a few seconds then settled down again. Ran a few long jobs on it and all was well.

Thanks for your input Jomama, appreciated

[Jomama46]

I hope you cleaned and initialized the ID sensor. It is the I sensor that determines when to add toner. The TD sensor tries tomaintqin the correct ratio but it is the id sensor that has that primary responsibility

[stephend]

Just wanted to give you an update on the conclusion to this fault, well they haven't called back yet anyways.
I replaced the TD sensor this morning, ran the TD initialize which failed on the first try, SC342. Ran it again, this time it worked. It was still asking for toner though, let it run and it came around. Made a copy which was very overtoned. Removed the toner bottle and made 10 sky copies. Then ran the TD initial again. Did this a few times, until it came down to an acceptable level (popped the toner back in at this time). Ran a few jobs and the toner light came on again, but only for a few seconds then settled down again. Ran a few long jobs on it and all was well.

Thanks for your input Jomama, appreciated

Why do you insist to reinitialize the TD sensor with old developer??? Everything now must be started from the scratch. And another question is about the drum: how old is it...is the id sensor clean?
I will start fresh from the scratch but before you will start fresh check if the toner supply system is functioning properly. Also TSB 004 TONER BOTTLE PAWL MODIFIED - CORRECTLY SET TONER BOTTLE could be helpful for the initial problem you mention it...add toner.:
Check SP 2209 maybe somebody before you did some wrong adjustments.
Another way to troubleshoot this problem is to activate the sp 2967. "During auto process control execution after the main switch is turned on, the toner amount in the development unit is normally checked and adjusted using the ID sensor. However, in some environments, such as where there could be traces ammonia in the air, copies could appear dirty or too dark because the ID sensor reading is not reliable".
Again..the easiest way is the simplest one:
1. Empty and vacuum the dev unit.
2.Put a new filter and a new bag of dev.
3. Run 2801 only once , run 3001-02 assuming that drum is good, blade & brush are in PM cycle and id sensor clean, run 2962 and verify if 3901 is on...it should be.
Good luck

[CableGuy]

Good info

Thanks again guys, the info is top class. I think what was leading me there, was the SC code that came up Sc342. But only after a while did it appear. You are proberbly right though, it was proberbly my tinkering around with it that didn't help. The machine has been working fine the last few days, but I'll be able to check up on it as there is a potential problem with the MPC standing next to it.

That will give me the oppertunity to print out an SMC and see how it is performing. I think initially the machine was starved of toner, but as per usual the customer would not admit to anything of the like.

The drum unit and all its surroundings were cleaned, serveral times, as we all know this will usually clear 90% of our problems (let that be a lesson to those who don't believe in cleaning machines before actually tackling a fault)

But I will bear your suggestions in mind if I do come across this in future.

Cheers

[stephend]

Good luck and cheers