MP W2401 PS CODE SC-406

[Polo-022]

I have this code, with the following symptoms : 1. Machine reboots, after that it shows the SC-406 code 2. Partial printed drawings all over the printed paper, unreadable. So far i have replaced T/DT corotron assembly, T/DT Power Supply and Drum-for other reason this. Machine works for some days without a problem and then it codes again. On/Off and continues..
Thanks a lot for any input..

[Brianneoe]

Re: MP W2401 PS CODE SC-406

From the 3606 manual, did not see it on my 2401 manual but its probably the same solution..

406 D ID Sensor Pattern Edge Detection Error
The ID sensor pattern check could not detect the correct voltage on the ID
sensor pattern (below 2.5V) within 0.6 sec.
�� ID sensor dirty
�� ID sensor harness loose, damaged, defective
�� ID sensor connector defective
�� ID sensor defective
�� MCU defective
�� CGB power pack defective

Did you replace the drum first and then had this problem? If the allen screws are loose the drum drive could be slipping causing this problem.


Good luck

[keithxxiii]

Re: MP W2401 PS CODE SC-406

What's the value of your PWM? If it is higher that the specified value, check your ID sensor. Also, follow what brian has posted

[Polo-022]

Re: MP W2401 PS CODE SC-406

From the 3606 manual, did not see it on my 2401 manual but its probably the same solution..

406 D ID Sensor Pattern Edge Detection Error
The ID sensor pattern check could not detect the correct voltage on the ID
sensor pattern (below 2.5V) within 0.6 sec.
�� ID sensor dirty
�� ID sensor harness loose, damaged, defective
�� ID sensor connector defective
�� ID sensor defective
�� MCU defective
�� CGB power pack defective

Did you replace the drum first and then had this problem? If the allen screws are loose the drum drive could be slipping causing this problem.


Good luck

Well, i read it at Goose Guide that slipping setscrews can cause this problem and yes, problem is more often after drum replacement. I'll be back on Tuesday for the feedback.

[Polo-022]

Re: MP W2401 PS CODE SC-406

What's the value of your PWM? If it is higher that the specified value, check your ID sensor. Also, follow what brian has posted

I don't know why the sevice manual insists about ID sensor, i will try to post a sample..

[Polo-022]

Re: MP W2401 PS CODE SC-406

I would like to inform you that there are no slipping setscrews
because this drum shaft is D shaped, so it cannot slip...No way!!
RW-240 has that kind of problem as i recall, the shaft is circular!
Certainly, i would not expect a slipping shaft can cause reboots!!!

[JDYAL]

Re: MP W2401 PS CODE SC-406

What drum did you use? Aftermarket drums cause these codes on this model. Did you use a blue or green drum?

[Polo-022]

Re: MP W2401 PS CODE SC-406

What drum did you use? Aftermarket drums cause these codes on this model. Did you use a blue or green drum?

Drum is original.
But, i never had any problems with aftermaket drums, blue or green, never.

[JDYAL]

Re: MP W2401 PS CODE SC-406

Are there any other codes in the sc history? Are your timing belts worn? Sometimes the belts start deteriorating prematurely and cause issues. Can you send and example of what the partial prints look like.

[keithxxiii]

Re: MP W2401 PS CODE SC-406

What's the value of your SP 3001-01? Is it higher that the normal operating value? Can you at lease upload the sp table?

[Polo-022]

Re: MP W2401 PS CODE SC-406

Are there any other codes in the sc history? Are your timing belts worn? Sometimes the belts start deteriorating prematurely and cause issues. Can you send and example of what the partial prints look like.

There are no other Service Codes. Timing belts are new, machine has 27K. meters counter and i replaced both of them at 20K. meters. Charge corotron Assy and CGB Power Pack have been replaced also, making no difference.
When i disengage developer drive gear machine prints a sheet and it pops up the code 406, every time i do this. So, i suspect a motor failure or MCU which drives the motor...

[Brianneoe]

Re: MP W2401 PS CODE SC-406

Your sample helps. Never had to replace the DV drive motor but that is what it looks like..You may want to change SP 2208-3 to a 1 for the time being so the machine does not code out(toner supply mode -Fixed mode)and Sp 2208-1 will set the amount of toner drop{0 low to 3 very high} That will bypass the drum patch check and should stop the SC406 until you get a motor.

That DV unit has a lot of torque on it as you may know and is a pain to change the developer in it. If the developer unit has too much developer in it it can cause the unit to lock up in theory . Anytime I change developer in this machine I don't add the full bag just for that reason.
Don't forget to change SP 2208-3 back to a 0 if you go that route after you replace the parts.

Good luck

[Polo-022]

Re: MP W2401 PS CODE SC-406

What's the value of your PWM? If it is higher that the specified value, check your ID sensor. Also, follow what brian has posted

It is 15 to 15.7% after initialization, default value is 20.

[Polo-022]

Re: MP W2401 PS CODE SC-406

Today i replaced ID sensor, which cannot produce a c.q. problem like that,
but it senses that machine cannot create the toner patch. SC-406 again..after 60 drawing prints.
I had with me a motor from 240RW, a used one, with the same part number.
I replaced motor, plug/jack in/out at MCU and i am waiting...it can not be the worst senario : ΜCU faulty!!

[JDYAL]

Re: MP W2401 PS CODE SC-406

I would pull the developer gears off and check them. I have had a gear go bad. As mentioned to much or to little developer causes problems. I also have never had a drive motor go bad but its possible. It could be a bad developer unit though.