Toner levels es4540c

[Valintine]

Hello

We have been getting in used es4540c series machines and have seen an issue with the toner levels not being correct. A number of the machines say the bottle is empty when there is plenty of toner in the bottle. I am using oem but in some cases I have used bottles out of machines that have frame damage. Any thoughts would be appreciated.

Thank you

[djbass]

Re: Toner levels es4540c

Toner level is set my the ratio of toner to developer in the developer assembly.

Either the toner is not being fed into the developer assembly (can happen if the toner inside cartridge goes hard and the stirrer inside cartridge can not turn properly), or there is an issue with the developer or auto toner sensor.

[blackcat4866]

Re: Toner levels es4540c

I had an e Studio 4520C that was giving toner add messages several times a day. After replacing numerous items, we determined that there was a power issue, that was blowing the chips on the toner cartridges. The 4520C was sharing a 20A circuit with an e Studio 855. Even though there were other electrical circuits nearby, the enduser selected to connect both on the same circuit because he had only one surge suppressor and did not want to plug in either machine without the surge.

Interestingly, the chips on the toner cartridges are interchangeable within the model. There is no color designation on the chip, and if the chip is blown, you can borrow a chip from any other color new cartridge of the same model. =^..^=

[djbass]

Re: Toner levels es4540c

Interesting, I always thought toner level was 100% determined by the ATS in the dev tank (and on some machines that is the case), seems there is also a counter on the toner chip:

[FONT=Arial][SIZE=2][FONT=Arial][SIZE=2]An IC chip is embedded in this board. Data such as identification information for the recommended
TOSHIBA toner cartridge, thresholds to determine if the cartridge is nearly empty, and controlling data
for the image quality to be optimal according to the toner characteristics are written in this chip.
To measure the amount of toner remaining in the cartridge, when the value of the counter for the period
of the toner cartridge rotation time (08-6246) is updated, this equipment writes the updated value into
the toner cartridge PC board (CTRG).


[/SIZE][/FONT][/SIZE][/FONT][FONT=Arial][SIZE=2][FONT=Arial][SIZE=2]AA sign of the status in which the toner cartridge is nearly empty (displayed by the behavior of the toner
lamp) appears when the counter value for the toner cartridge rotation time has exceeded the threshold
previously written in the toner cartridge PC board (CTRG).
When a used cartridge refilled with new toner is used, a sign of the status that the toner cartridge is
empty appears because information for determining the empty status is already written in the toner
cartridge PC board (CTRG).
When a non-recommended toner cartridge is used, "Toner not recognized" appears on the touch panel,
and then the equipment may stop normal operations. The toner remaining display function, the toner
remaining check function, the automatic remote supply order to TOSHIBA sales representatives and
the image optimization function may be disabled either.
The toner near-empty status threshold setting (08-5155) is provided to adjust the timing for displaying
the toner near-empty status as follows.


[FONT=Arial][SIZE=2][FONT=Arial][SIZE=2]0: The period from the appearance of the toner near-empty sign to the actual complete consumption of
the toner is set to the long.
1: Normal (Default)
2: The period from the appearance of the toner near-empty sign to the actual complete consumption of
the toner is set to the short.
[/SIZE][/FONT][/SIZE][/FONT]

[/SIZE][/FONT][/SIZE][/FONT]

[djbass]

Re: Toner levels es4540c

Interestingly, the chips on the toner cartridges are interchangeable within the model. There is no color designation on the chip, and if the chip is blown, you can borrow a chip from any other color new cartridge of the same model. =^..^=

The manual also states there IS a colour designation written to the chip, but it will only trigger an error code if 2 or more colours are detected as incorrect.