Ricoh C226 Service Manual page 71

OPTICS/IMAGE PROCESSING
P.LYNC
Image
Data
1. When the clock signals (CK1 – 4) enter the thermal head drive control
board, the 768 pixels of image data are input into the shift register.
When the latch signal enters to the control board, the image data is sent
from the shift register to the latch in parallel.
2. Above operation is performed again.
3. The image processing operation is performed when the ENL signal is low.
The image data of the (768 pixels each) main scan line is divided into 4
blocks.
4. The image signal for the preheat is sent to the thermal control twice.
The first image signal responds to the first half of ENL low signal , and the
second image signal responds to the later half of ENL low signal.
C226 2-22 SM