LG GR-K192AF Service Manual - Page 19
Stepping motor operation circuit 3-way valve, 2-8. Power failure compensation circuit located
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MICOM function and circuit description 5-2-7. Stepping motor operation circuit (3-way valve) u The motor is operated by sending out "High" and "Low" signals as many as the designated number of steps through MICOM Pin 15, 16, 17, 18 to rotate the motor through the magnetic field formed by the motor and the coil wrapped around each stator. 5-2-8. Power failure compensation circuit (located on display PCB) u The power failure compensation circuit recalls the temperature range of the right and left compartments and maintains these levels if power if interrupted briefly. The IC for power failure compensation (EEPROM) delivers to and maintains the information in MICOM through the serial interface. - 19 -
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5-2-7. Stepping motor operation circuit (3-way valve)
u
The motor is operated by sending out "High" and "Low" signals as many as the designated number of steps through
MICOM Pin 15, 16, 17, 18 to rotate the motor through the magnetic field formed by the motor and the coil wrapped
around each stator.
5-2-8. Power failure compensation circuit (located on display PCB)
u
The power failure compensation circuit recalls the temperature range of the right and left compartments and maintains
these levels if power if interrupted briefly.
The IC for power failure compensation (EEPROM) delivers to and maintains the information in MICOM through the serial
interface.
MICOM function and circuit description
- 19 -