Hi guys,

just want to share some information with you all.

Encounter a problem when user is printing on Art Paper which is 270gsm, it came out dark background. However when printing on normal plain paper it was fine and test print color pallete, the result is good can't find any background on it.

first i thought Fuser unit caused this problem because thick paper pass thru fuser might stick something on it. therefore i replace it, but problem remain same, it has background.

Secondly, i suspect 2nd Btr or image belt caused the problem because of transfer process weak on Art Paper, therefore i service it and problem remain there.

thirdly, i do calibration on printing job, remain same problem.

Lastly, i replace the (K) Drum unit, it had solved the problem.. still wondering why is this happen, drum look fine at the surface.

please refer to the pictures i attached here. thanks... ApeosPort 7550i Sample01.jpgApeosPort 7550i Sample02.jpg