LG GR-J303TS Service Manual - Page 19
Open/Close status, of lower damper, Single Damper, Reed Switch, IC1 MICOM H : 5V, No.1 pin input
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3-2-7. TEMPERATURE SENSING CIRCUIT 1.Temperature adjustment at the lower compartment consists of the circuit part for driving the damper, as electronic single motor damper, to open or close the baffle and the reed switch part to detect open/close status of the damper. 2. Drives the motor, and if there is no status change of the reed switch within 2 minutes, determines it as failure and displays as failure (See 3-1-11. Failure Diagnosis Function). 3. Rotates once for 15 seconds irrespective of temperature to detect damper status in input of initial power (initial drive inspection). Single Motor Damper 100V~127V deleted 4. Open/Close of the damper, status of the reed switch and No.1 pin input of the IC1 (MICOM) are as follows: ቢ ባ OPEN Open/Close status of lower damper CLOSE Single Damper Reed Switch ON OFF IC1 (MICOM) "H" : 5V No.1 pin input "L" : 0V Position Lower Damper status ቢ Open ባ Close 2sec Operation Stop Operation Stop u The above time is time until the single motor stops after status change of the reed switch. - 19 -