Samsung SF4500, Service Manual

Page: 38 / 130

Samsung Electronics 6-7
6-1-2-7. INKJET HEAD CONTROLLER
This part produces major control signals used to
drive INKJET head. It consists of signals to drive
head nozzles, /HGA[13:1], HOE[16:1], /FA U LT-
T E S T, /HEAD-EN, and BIASOFF, and consists of sig-
nals to check the status of the head, HEAD-DATA .
It has double height print head, system 208 nozzles
for mono and 192 nozzles for color, and uses
/HGA[13:1], HOE[16:1] signals and /HEAD-EN to
drive these nozzles. Fig.5-1-8 is timing diagram of
each signal.
Fig.6-1-8 Timing Diagram to Drive Head