bizhub C650 keeps asking for TN-K even though the toner is full

**Oneir** · 07-30-2013

bizhub C650 keeps asking for TN-K even though the toner is full, changed the IU-K and the same thing, tried another toner and no change.
I changed the engine board and the problem persisted. I changed the NVRAM and the problem still continued. What could be the problem????
My business is losing $$ daily.

**emujo** · 07-30-2013

Are you a tech, or end user? If a tech what are the TCR levels displaying for the K-IU? Emujo

**Oneir** · 07-30-2013

tech/end-user. The TCR level is set to 0 and supply level is 7.14%

**Oneir** · 07-30-2013

Originally Posted by Oneir

tech/end-user. The TCR level is set to 0

and supply level is 7.14%

**minimerlin** · 07-30-2013

You need to do some fault finding...check out the hopper sensor..if the unit is asking for toner then something is not working correctly. It is fairly easy to remove the hoppers and swop over sensors.

**EarthKmTech** · 07-30-2013

also make sure the toner cartridge chip contacts aren't mangled from rough handling at the front of the machine, it the contacts aren't 100% you will have this problem. Had it before.

**blazebusiness** · 07-30-2013

Originally Posted by EarthKmTech

also make sure the toner cartridge chip contacts aren't mangled from rough handling at the front of the machine, it the contacts aren't 100% you will have this problem. Had it before.

Good idea....also make sure the plastic piece that latches the cartridge so it mounts snugly in place hasn't spread open a little. And.... I've seen customers order a full set of BH C451 toners not realizing that the color toners are exactly the same but the C451 black toner is different (well, maybe it's not the toner-- but the chip programming certainly is different) and the cartridge won't be detected/work in the C550/C650's.

**EarthKmTech** · 07-30-2013

yeah, it would be a shame if the machine is now virtually destroyed simply because its the wrong version black toner. (see other post)

**Oneir** · 07-31-2013

I have already changed the toner, putting in a new one and checked the contacts and they are fully intact.

**pepper38_cnd** · 07-31-2013

You need to check the chip connectors on every toner and Iu if any one of them are out of shape and shorted to the metal bracket any of the supply messages may be displayed.