Epson EPL-6200L service manual Laser Emission Timing, Laser Emission Area

EPSON EPL-6200/EPL-6200L Revision A

2.2.1.3 Laser Emission Timing

†When the Ready signal is detected upon passage of a certain period of time after issue of the printing start signal, the Laser ON signal is output from the Mechanical Control Board. (See “Figure 2-9”)

†Upon issue of the Laser ON signal, the laser beam is forcibly emitted. The laser beam, via the polygon mirror → G1 lens → SOS mirror, strikes the SOS sensor to issue the SOS signal.

†This SOS signal unifies the timing of the laser emission for every line of main scanning.

2.2.1.4 Laser Emission Area

†Main Scanning Direction (See “Figure 2-10”)

„Printing start timing with laser is such that the printing start position is determined by the main scanning printing start signal (/HSYNC) output from the Mechanical Control Board and by the paper width.

„The laser emission area is determined by the paper size. However, the 4-mm width area at each of right and left edges is a no-image area.

†Sub Scanning Direction

„Printing start timing with laser is such that the printing start position is determined by the sub scanning printing start signal (/TOD) output from the Mechanical Control Board and by the paper length.

„The laser emission area is determined by the paper size. However, the 4-mm width area at each of the head and tail edges is a no-image area.

SOS Mirror

G1 Lens

SOS Sensor

Figure 2-9. Laser Emission Timing

Polygon Mirror

Figure 2-10. Laser Emission Area

Operating Principles Description of Mechanisms 75