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2.2 Electrical Section
To supply a driving voltage to the motor, IC, BJ cartridge, etc., the electrical section
converts the AC voltage received from the AC power source into DC voltage.
a) AC adapter
The AC adapter converts the voltage from the AC power source into three voltages:
+27 VDC, +19 VDC, and +5 VDC.
The +27 VDC's output is controlled according to the signal (DWCONT) output by the
printer controller.
The +27 VDC is used as LF, CR, ASF, and PG for the respective motor drive power
source.
The +19 VDC is the print head's heater driving power source.
The +5 VDC is the logic system's power source. It is constantly supplied by the AC
adapter. As a result, as long as AC power is being supplied, all the hardware except
the sensors, driver IC, and BJ cartridge are in the active state.
b) DC/DC converter
The DC/DC converter on the control board converts the voltage into +5 VDC and +3.3
VDC and outputs both.
The +5 VDC is used for the EEPROM and reset driving power source and the power
voltage for the HVDD, VIF, and VSEN. The HVDD, VIF, and VSEN power voltage
outputs are controlled by the printer controller.
Also, the +5 VDC is used as the power source for the printer controller, MPU, DRAM,
and control ROM. It is also used as a pull-up power source for various switches.
By using +3.3 VDC as the power source, the power consumption during power off is
less than when +5 VDC is used.
3-11
S600
Part 3: Technical Reference
Technical
Reference