OKI C7550

• Code: 390
• Display: Check MP tray 390: Paper jam
• Description: Paper jam during paper feed from MT.
• Remedy: Check for miss-fed paper around MT cassette. Remove miss-fed paper and close cover. Check/replace MT.

• Code: 391 ... 395
• Display: Check tray * 391~395: Paper jam
• Description: Paper jam detected between cassette and black ID.
• Remedy: 1) Check jammed paper between cassette and yellow ID. 2) Check if paper entry switch is normal.
  Remove jammed paper. Replace entry switch.

• Code: 400
• Display: Open top cover 400: Paper size error
• Description: Non-set paper (45mm or above) detected by printer engine.
• Remedy: 1) Is paper custom size? 2) Is paper standard size?
  No treatment required. Adjust paper size guide in cassette. Replace paper size board (PXC PWB).

• Code: 410, 411, 412, 413
• Display: Refill toner 410: Yellow 411: Magenta 412: Cyan 413: Black
• Description: Certain toner is almost empty.
• Remedy: 1) Selected toner cartridge is almost empty. 2) Check if selected toner cartridge is normal.
  Replace with new toner kit. Replace selected toner sensor.

• Code: 480
• Display: Remove paper 480: Stacker full
• Description: Paper ejection stacker is full.
• Remedy: 1) Check if stacker is full. 2) Check if stacker full sensor is operating properly.
  Remove paper from stacker. Replace stacker full sensor.

• Code: 490
• Display: Set *** 490: No paper in MP tray (* stands for A4 B4, etc.)
• Description: No paper in selected cassette. cassette is not set, or paper ran out in cassette being used.
• Remedy: 1) Check if paper is empty in MT. 2) Check if paper-end sensor is operating properly.
  Set paper in MT. Replace paper-end sensor.