Xerox WorkCentre XK50cx, Service Manual

Page: 45 / 109

4-18
Circuit
• HEAD DETECTION CIRCUIT
Ink cartridge has 8-bit mask ROM I.D. to check the
type of cartridge. In order to detect the head, HSM
signal is used as ENABLE signal and BA3 signal
as START & STOP BIT, and BA1 and BA2 as clock
signal of each bit, and ID signal in the cartridge is
put in HEAD-DATA port of KS32C6400 through
BSF line. With each bit
controlled, 8bit I.D data is read and STOP bit is put
out of BA3(LOAD) port. Then it finishes.
Fig.4-2-3 Temperature around Color Head
70°C
Fig.4-2-4 HEAD DETECTION TIMING DIAGRAM
Color Head