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Уважаемый, вы вообще в теме? Какая заправка (картриджей емкостью 5 Кстр) на пробеге аппарата в 920 страниц? Только если листовки для Билайна или ЛДПР печатали)))
Developing unit Y non-installing error (No density detection signal is output from toner sensor Y in developing unit Y).
1. Faulty connection of the connector between the developing PWB Y and drum relay PWB - Check the installation of the developing unit Y and drum relay PWB and reinstall them if necessary.
2. Defective harness between drum relay PWB (YC1) and engine PWB (YC34), or improper connector insertion - Reinsert the connector. Also check for continuity
within the connector harness. If none, remedy or replace the harness.
3. Defective toner sensor Y - Replace the developing unit Y.
4. Defective engine PWB - Replace the engine PWB.