In this second part of our "Maintenance Basics" series, we'll explore the Photoconductive Drum Section, commonly referred to as PH) of your printer or copier. Understanding the function and maintenance of this crucial component can significantly enhance your device's performance and longevity.
This issue shares the working principle of the Konica Minolta color printer "writing unit". The reference model is C364.
The above picture is a simulation of PH when performing laser irradiation. We can see:
- The four-color laser of the color machine irradiates the multi-prism (7-prism) at different incident angles.
- The multi-prism reflects the laser and reaches the various color return mirrors after passing through G1 and G2.
- Then it passes through the G3 lens and irradiates the surface of the photosensitive drum to complete the "static shallow image". This is the working process of PH.
- Of course, the intensity of the laser is determined by the image data. The deeper the laser, the stronger the laser intensity, and the shallower the laser, the weaker the laser intensity.
See the following picture for a deeper impression:
PH laser writing sequence:
- Main scanning direction: determined by the main scanning print start signal output from the print control board and the paper width.
- Sub-scanning direction: determined by the image writing start signal output from the print control board and the paper length.
If the laser is not irradiated at the edge of the paper, the paper edge elimination (main edge, side edge and trailing edge) is formed.
Skew adjustment:
- The PH unit is equipped with a temperature sensor. When the temperature changes or the quality of the PH components changes, it may cause color skew problems.
- The G3 lenses of the three colors of Y, M, and C are equipped with G3 skew correction motors, which can correct the skew through automatic adjustment.
If the PH window becomes dirty, it will cause poor exposure of the photosensitive drum and white lines or white bands on the image. You can use the PH window cleaning tool equipped with the front door of the host to clean it. You can use alcohol to clean it, not water.
Conclusion:
Understanding the working principles of the Photoconductive Drum Section (PH) in your Konica Minolta C364 color printer is essential for maintaining high print quality. By regularly inspecting and cleaning the PH components, and adjusting for any skew issues, you can ensure optimal performance and extend the lifespan of your device. Proper maintenance of the PH unit, including laser alignment and temperature monitoring, plays a crucial role in producing sharp, accurate images.
The previous article: Maintenance Basics | Principle of Automatic Recognition of Original Size (I)
The next article: Konica Minolta Tips | FTP Scanning