Samsung ML-3471ND - Error message (LCD window) related in a toner sensor

Service Manual
Adjustment and Troubleshooting
4-60
Samsung Electronics
4.2.5.4 Error message (LCD window) related in a toner sensor
It explains a message related in toner sensor in a LCD.
4.2.5.4(a) Invalid Toner
- Contents: It is displayed when a supplier is different between a toner cartridge and a set. If this message is shown up,
a printing process cannot operate.
- Solution: Attach a suitable toner cartridge (the same supplier's) to a set. (A unique key has been applied.)
4.2.5.4(b) Low Toner
- Contents: This message shows up when a message "remaining toner: 10%" is displayed in a cartridge count
information.
- Solution: It means that a toner in the toner cartridge has been almost ended. Repare the new toner cartridge.
4.2.5.4(c) Replace Cartridge
- Contents: It means the life span of a toner cartridge (except a toner part) has been ended. Even though a case that a
toner is refilled, the rest of major parts have been ended, so entire toner cartridge might be replaced.
- Solution: If an Toner Cartridge Life cycle Probreum, in a worst case, a toner overflows and it may cause a system fail.
Therefore, recommend a user to replace a toner cartridge.