Xerox WorkCentre XK50cx, Руководство по обслуживанию

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4-19
Circuit
• SURROUNDING TEMPERATURE SENSOR
DS1821(DALLAS SEMI.) is applied to read the
temperature around ink cartridge. It is used to get
optimum inking quality by keeping the viscosity of
ink in the cartridge in the specified level. The way
to read temperature is to control AMB-TEMP
signal. Digital thermometer to check the
surrounding temperature is assembled along with
CR Encoder sensor in the frame of assembly CR.
After each page is inked, it reads the surrounding
temperature and heats substrate heater in the ink
cartridge during the accelerating time of CR to
keep the viscosity of ink in the specified level.
* This temp. sensor can be changed without notice.
HEAD DRIVING TIMING
Control signal from MFP controller (Main PBA
KS32C6400:U15) enters the head driver (Driver
PBA : U33, U34, U35, U36) and it becomes the
level to be able to drive the head nozzles (+12V).
It is depicted in the following diagram.
Fig.4-2-5 HEAD DRIVING TIMING DIAGRAM