Samsung SF4500, Service Manual

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Samsung Electronics 6-17
• HEAD DETECTION CIRCUIT
Babbage 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 STA RT & STO P B I T, and BA1 and
BA2 as clock signal of each bit, and ID signal in the
cartridge is put in HEAD-DATAport of KS32C6200
t h rough BSF line. With each bit
c o n t rolled, 8bit I.D data is read and STO P bit is put
out of BA3(LOAD) port. Then it finishes.
If data is mono, it is 07H. If color, 08H.
Color Head
Fig.6-1-14. Temperature around Color Head
7 0 ° C
Fig.6-1-15. HEAD DETECTION TIMING DIAGRAM