Components

The LED head is composed of the following parts. No parts are replaceable, the whole LED head must be replaced.

  1. Sheet
  2. Base
  3. LED board
  4. Frame
  5. SLA (Self-focusing Lens Array)
LED Positioning

The LED head contacts the LED spacer on the drum in order to hold and adjust the correct focal distance from the PCDU (slide-and-move method).

Image Position Adjustment

You can adjust the printing position from each tray with [Registration] in Menu. At this time, the following controls are done as the adjustment in the machine;

Horizontal Scan: Adjusted by moving the whole image position.

Vertical Scan: Adjusted by changing the light-emission timing.

There is no mechanical adjustment, unlike laser writing.

Writing is applied across the length of the LED head in the horizontal direction. If you want to adjust to the printing position to an area that is outside the one that is within the setting range in [Registration], adjust the paper position in the feed tray. (Side-to-side Registration Adjustment in the Machine Paper Tray)

LED Light Volume Adjustment

An EEPROM on the LED head contains data which controls the light intensity of each element. There is no adjustment.

Adjustment at Replacement

Adjustment at LED head replacement is not needed because there is an EEPROM on the LED board. This ROM contains light volume adjustment data.