Code :

Code: 25
Display: Black/White Spot
Description: 1. Dark or blurry black spots occur periodically in the printing. 2. White spots occur periodically in the printing.
Causes: 1. If dark or blurry black spots occur periodically, the rollers in the Developer may be contaminated with foreign matte or paper particles. ( Charge roller : 37.7 mm interval OPC drum : 75.5 mm interval) 2. If faded areas or voids occur in a black image at intervals of 75.5 mm, or black spots occur elsewhere, the OPC drum surface is damaged. 3. If a black image is partially broken, the transfer voltage is abnormal or the transfer roller's life has expired.

Code: 26
Display: Light Image
Description: The printed image is light, with no ghost.
Causes: 1. Develop roller is stained when the toner of developer cartridge is almost consumed. 2. Ambient temperature is below than 10°C. 3. Bad contact caused by the toner stains between the high voltage terminal in the HVPS and the one in the set. 4. Abnormal output from the HVPS.

Code: 27
Display: Dark Image or a Black
Description: The printed image is dark.
Causes: 1. No charge voltage in the engine board. 2. Charge voltage is not turned on due to the bad contacts between power supply in the side of the Developer and charge terminal of HVPS.

Code: 28
Display: Uneven Density
Description: Print density is uneven between left and right.
Causes: 1. The pressure force on the left and right springs of the transfer roller is not even, the springs are damaged, the transfer roller is improperly installed, or the transfer roller bushing or holder is damaged. 2. The toner level is not even on the developer roller due to the bad blade.

Code: 29
Display: Background
Description: Light dark background appears in whole area of the printing.
Causes: 1. Does character exist less than 2% per a page, and hasn’t it been used long time? 2. Does recycle paper be used? 3. Has the life span of the developer ended? 4. Is the movement(Up and Down) of the transfer roller smooth? 5. Is the HVPS normal?

Code: 30
Display: Ghost (1)
Description: Ghost occurs at 75.5 mm intervals of the OPC drum in the whole printing.
Causes: 1. Bad contacts caused by contamination from toner particles between high voltage terminal in the main body and the electrode of the Developer. 2. Bad contacts caused by contamination from toner particles between high voltage terminal in the main body and the one in the HVPS board. 3. The life of developer is expired. 4. Transfer roller lifetime(50.000 sheets) has expired. 5. Abnormal low temperature(below 10°C).

Code: 31
Display: Ghost (2)
Description: Ghost occurs at 75.5 mm intervals of the OPC drum in the whole printing. (When printing on card stock or transparencies using manual feeder)
Causes: When printing on card stock thicker than normal paper or transparencies such as OHP, higher transfer voltage is required.

Code: 32
Display: Ghost (3)
Description: White ghost occurs in the black image printing at 47.5mm intervals.
Causes: 1. The life of the developer may be expired. 2. The abnormal voltage and bad contact of the terminal of the supply roller

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