Ricoh SAVIN D0AP Service Manual page 595

7.5 LED EXPOSURE
7.5.1 COMPONENT LAYOUT
No.
1
2
3
4
7.5.2 MECHANISM
Writing Method
LED writing is superior to LD writing in unit-downsizing, noise reduction, and energy saving.
Tiny LEDs, arranged in a line, are capable of creating images at 1200 dpi. Light beams emitted
by the LEDs are focused using the Self-focusing Lens Array (SLA), creating an image on the
OPC drum.
Each LED head has 26 LED chips on board, and each chip has a line of LEDs 8mm in length.
If a vertical line 8mm in width appears on the image parallel to the direction of paper feed, it may
be caused by a broken LED chip.
SM
LED head
LED spacer
Drum
Cleaning brush
7-33
Name
D0AP/D0C4/D0C5/D0C6/M0BQ/M0D1
LED Exposure