MX-C402sc dusting yellow

[Paulm]

I have a new (within 3 mths) MX-C402sc that is dusting the transfer belt with yellow toner, which causes yellow background on prints/copies. This is intermittent. At first we thought short in the drum unit causing dv pull and eventually over tone, but we replaced supplies and within 2 weeks issue returned. Again yellow only. Anyone else run into this or have an idea as to cause? Thanks Paul

[blackcat4866]

Re: MX-C402sc dusting yellow

Did those supplies include the scorotron and grid? Those are the usual cause of pulling developer. =^..^=

[Paulm]

Re: MX-C402sc dusting yellow

Thanks for the reply. The DR unit for this machine is an SRU that comes all inclusive, so I would have to say yes.

[ntbann]

Re: MX-C402sc dusting yellow

When you ran TC 25-02 did you pull the toner units out? If not this can cause problems on the newer machines.

[Paulm]

Re: MX-C402sc dusting yellow

Hi, Thanks for the response. These units auto configure the initial density (25-2) upon replacement. They also reset DV and DR counts upon replacement.

[ZOOTECH]

Re: MX-C402sc dusting yellow

Hi, Thanks for the response. These units auto configure the initial density (25-2) upon replacement. They also reset DV and DR counts upon replacement.

They don't without tech running the toner density(25-2) and clearing the dv/drum counts 24-5/7; perhaps you're thinking of another machine.

[ntbann]

Re: MX-C402sc dusting yellow

Agree with Zootech. counters have to be cleared and 25-2 has to be run.

[Paulm]

Re: MX-C402sc dusting yellow

Agree with Zootech. counters have to be cleared and 25-2 has to be run.

Section 9-1 subsection B quote below:

B. Toner density initial setting
When the developer cartridge is replaced, the initial setting of the
toner density is automatically executed.
If another simulation is executed or the machine power is turned
OFF during execution of this simulation, the initial setting of the
toner density cannot be executed normally. Therefore, never operate
the machine until the initial setting of the toner density is completed
(the machine enters the print (copy) ready state).

Forgot subsection A also:
A. Counter reset (MX-C402SC/C382SC)
(1) MX-C402SC/C382SC
When the developer cartridge, the drum cartridge, the primary
transfer unit, the secondary transfer unit, or the fusing unit is
replaced with a new one, the initial detection function operates after
turning ON the power to reset each counter automatically.
When the machine is initialized during warming up, or when the
simulation is executed or the machine is turned OFF and the door
is opened before the machine enters the print (copy) ready state,
the initial detection function may not operate normally. Therefore,
never execute the simulation or never operate the machine such as
turning OFF the machine power and opening the door before the
machine enters the print (copy) ready state after replacing one of
the above parts and turning ON the power.
When the counter is not automatically reset, it must be reset manually.
Since the maintenance counter (total) and the maintenance
counter (color) are not automatically reset, they must be cleared by
executing SIM24-4.
(For details, refer to the page of "2. Maintenance timing display.")

[ntbann]

Re: MX-C402sc dusting yellow

Look at D on the same page.

[faxman28]

Re: MX-C402sc dusting yellow

Hi, Thanks for the response. These units auto configure the initial density (25-2) upon replacement. They also reset DV and DR counts upon replacement.

When you replaced the dev units, you had "please wait do not turn power off" and then when it completed it changed to "Install toner cartridge" If you didn't see these messages (when dev is replaced before its time) the auto density did not take place probably. did the dv count go back to zero. when maintence time you have message of change supplies developer cartridge, when dev cart is changed it should do auto density as long as no other setting or such is done, and change supplies message should clear if not auto setting was not done then 25-2 needs to be done manually. also if 26-55 is set it should go into auto color calibration also or you would have to do 46-74.

[harleyrider]

Re: MX-C402sc dusting yellow

If I was to replace dv early I would run 25-2. My 2 cents worth. I wouldn't trust auto.

[faxman28]

Re: MX-C402sc dusting yellow

Look at D on the same page.

D is for the B402sc which is b/w. auto settings for density is on color machine , have done this many times .

[faxman28]

Re: MX-C402sc dusting yellow

when you pulled the strip out of the dev cartridge was there a red line/mark at the end. If not part of the strip is still in cart , which can cause issues.

[Paulm]

Re: MX-C402sc dusting yellow

Look at D on the same page.

Hmm I seem to have D listed as for the MX-B model. I must be missing something.

[ZOOTECH]

Re: MX-C402sc dusting yellow

Section 9-1 subsection B quote below:

B. Toner density initial setting
When the developer cartridge is replaced, the initial setting of the
toner density is automatically executed.
If another simulation is executed or the machine power is turned
OFF during execution of this simulation, the initial setting of the
toner density cannot be executed normally. Therefore, never operate
the machine until the initial setting of the toner density is completed
(the machine enters the print (copy) ready state).

Forgot subsection A also:
A. Counter reset (MX-C402SC/C382SC)
(1) MX-C402SC/C382SC
When the developer cartridge, the drum cartridge, the primary
transfer unit, the secondary transfer unit, or the fusing unit is
replaced with a new one, the initial detection function operates after
turning ON the power to reset each counter automatically.
When the machine is initialized during warming up, or when the
simulation is executed or the machine is turned OFF and the door
is opened before the machine enters the print (copy) ready state,
the initial detection function may not operate normally. Therefore,
never execute the simulation or never operate the machine such as
turning OFF the machine power and opening the door before the
machine enters the print (copy) ready state after replacing one of
the above parts and turning ON the power.
When the counter is not automatically reset, it must be reset manually.
Since the maintenance counter (total) and the maintenance
counter (color) are not automatically reset, they must be cleared by
executing SIM24-4.
(For details, refer to the page of "2. Maintenance timing display.")

When you replaced the dev units, you had "please wait do not turn power off" and then when it completed it changed to "Install toner cartridge" If you didn't see these messages (when dev is replaced before its time) the auto density did not take place probably. did the dv count go back to zero. when maintence time you have message of change supplies developer cartridge, when dev cart is changed it should do auto density as long as no other setting or such is done, and change supplies message should clear if not auto setting was not done then 25-2 needs to be done manually. also if 26-55 is set it should go into auto color calibration also or you would have to do 46-74.

Just goes to show you, that you think you know a machine, but that might not be really true.
Sorry, PaulM. and thank you and faxman28 for the lesson.