Toner Leakage from Toner Cartridges：Apart from shell damage, toner leakage usually occurs during transportation or results from toner buildup on the magnetic roller inside the cartridge in the course of customer operation.
Practical Guidelines for Toner‑Cartridge Refilling & Handling：
1. Power off the printer before installing or removing the toner cartridge.
2. Gently shake a brand‑new toner cartridge several times prior to installation to loosen and evenly distribute toner powder for optimal printing quality.
3. Prevent the OPC photosensitive drum from direct light exposure and avoid touching the drum surface with bare hands.
4. When toner is nearly depleted and printed text turns faint and patchy, take out the cartridge and shake it lightly; this enables dozens of extra printed pages.
5. Keep one spare new‑model toner cartridge on hand to prevent interruption to daily office‑work.
6. Seal and store empty spent cartridges properly for environmental‑pollution prevention.
Common Toner‑Cartridge Faults & Troubleshooting Solutions:
◆Toner leakage: Besides cartridge‑shell breakage, the fault is mostly triggered by accumulated toner on the built‑in magnetic roller from transit or daily usage. The easy fix is to rotate the photosensitive drum along its working direction for several cycles.
◆Vertical black stripes over 1‑centimeter‑wide appearing both on printed documents and the drum surface (often mistaken for toner leakage): The cleaning blade malfunctions and fails to scrape residual toner fully off the drum roller.
◆Thin vertical black streaks on print‑outs: Contaminants or shredded paper scraps get stuck to the cleaning blade and its auxiliary wiper flap.
◆Horizontal black marks on printed sheets: Toner deposits build‑up on the magnetic roller; rotate the drum in its running direction several turns for removal.
◆Obvious background grey fog across prints: Defects exist on the photosensitive‑drum surface or the installed toner powder.
◆Uneven print density and distinct blank white stripes: Inspect toner coverage on the exposed magnetic roller. Patchy toner coverage (some sections coated with toner while others are bare) signifies that the cartridge has run out of toner.
◆Blank output sheets from the printer: First inspect the printer hardware. If the printer functions normally, the toner cartridge suffers from faulty assembly.
◆Any other printing‑related faults not listed above generally stem from printer‑side malfunctions.
