Movement - Ricoh C226 Service Manual

2.3.3 Movement

The temperature of the thermal head increases excessively when there is
consecutive black image data in the sub scanning direction. Conversely, the
temperature of the thermal head does not reach the proper point when there
is consecutive white image data before a solid fill.
PDATA
(Previous Line)
PDATA
(Scan Line)
1st Output
2nd Output
Black Image Signal
•
White image in previous scanning.
•
The same black image signal is output twice.
The first is for preheating.
•
Black image in previous scanning.
•
A white image signal is output first to reduce the thermal head
temperature.
SM
Main Scanning
Image
Non Image
White Image Signal
2-21
OPTICS/IMAGE PROCESSING
C226