toshiba e-studio 2550c toner not recognized

[bruce 49dcs]

machine worked great at the shop so i delivered it now it says ck toner not recognized it also said replace magenta so i calibrated the magenta dv and that went away but still says ck toner not recognized all toners show 70 % or better
all are oem i also replaced the toner motor and sensor board no help
is there a secret 08 code like 08-499 which did not work
any help would be great
thanks
bruce

[SalesServiceGuy]

Check that the springs on the CTIF board which connect with the contacts on the toner are all pointing straight forward.

Replace the CTIF board as they are not expensive. There should be enough extra cable length to connect a new board but it is an awkward spot.

[bruce 49dcs]

I replaced the board first and no good do you know why it says ck toner not recognised does the ck mean check or cyan and black

[SalesServiceGuy]

From the Service Manual

• The counter value for the toner cartridge rotation time has exceeded the threshold previously written
in the toner cartridge PC board (CTRG). (Related code: FS-08-5155)
• The remaining amount of toner is equal to or less than the set amount (percentage or number of
sheets). (Related code: FS-08-5155, FS-08-5810, FS-08-5811)
When a used cartridge refilled with new toner is used, a sign indicating 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 control
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 also be disabled.
The self-diagnosis codes to adjust the timing for displaying the toner near-empty status are as follows.

Toner near-empty status threshold setting (FS-08-5155)
<Setting value>
0: The period from the appearance of the toner near-empty sign to the actual complete consumption
of the toner is set to 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 short.
4: Toner near-empty status threshold value: (%)
5: Toner near-empty status threshold value: (Number of sheets)
• Toner near-empty status threshold value setting (%) (FS-08-5810)
Use this code to specify the threshold value (unit: %) for displaying the toner near-empty status.
This code is used when the value of FS-08-5155 is set to "4".
Sub-code 0: K, sub-code 1: Y, sub-code 2: M, sub-code 3: C
• Toner near-empty status threshold value setting (number of sheets) (FS-08-5811)
Use this code to specify the threshold value (unit: number of sheets) for displaying the toner nearempty
status. This code is used when the value of FS-08-5155 is set to "5".
Sub-code 0: K, sub-code 1: Y, sub-code 2: M, sub-code 3: C
• Fine adjustment of threshold value for displaying the toner remaining amount / toner near-empty
(FS-08-5156)
Performs fine adjustment of the threshold value for displaying the toner remaining amount and toner
near-empty.
Display threshold value = Default threshold value x setting value/100 (Unit: %)

[gliderider]

Had the same problem a couple of years ago. Go into job status and verify which color(s) are not being recognized. Change those toner cartridges. I went through the same process as you and it ended up being nothing more than bad crum chips on the offending toner cartridges.

[bruce 49dcs]

thanks gliderider that prompted me to replace the black and cyan which seemed improbable but somehow I had put tfc50 c ND K instead of tfc30 now all is well