京瓷1124 打印機(jī)復(fù)印時(shí)突然顯示機(jī)器故障，請(qǐng)聯(lián)系維修人員C7990是怎么回事？
 京瓷常見故障問題解答  2015-11-5 21:34:44 
 C7990,清廢粉倉(cāng)

  小馬 2017-7-30 9:41:04 
 C7990廢粉已滿 廢粉傳感器檢測(cè)到廢粉箱 (感光鼓單元)已滿。更換新的廢粉倉(cāng)即可.

  京瓷1124售后技術(shù)論壇 褚輛丞 2018/10/26 18:03:34  code C7990 on a Kyocera FS-1035 MFP.
Waste toner full. The waste toner sensor has detected that the waste toner reservoir (drum unit) is full.
Waste toner reservoir (drum unit) is full = Turn the power switch off/on to restart the machine. If the error is not resolved, replace the drum unit
Defective waste toner sensor = Replace the waste toner sensor.

手機(jī)用戶39.144.*.* 發(fā)表于 2023-6-8  c7990故障  

技術(shù) 施蕁 發(fā)表于 2023-6-10  換廢粉盒方法，打開后蓋，取出硒鼓，取出顯影，再取出廢粉盒更換即可