LG GR-K192UF Service Manual page 17

MICOM function and circuit description
5-2-4. Load/Buzzer driving circuit
(1) Load driving circuit
Type of load
Measuring point (IC7)
ON
Status
OFF
(2) Buzzer driving circuit (located on display PCB)
g Only the buzzer sound for the Lock/Unlock operation is shown in this SVC technical manual.
Status
Ex) Lock: "Ding-D-Dong" sound
Measuring
point
5V
IC101 (Pin 3/61)
0V
5V
IC101 (Pin 2/62)
0V
COMP. fan motor
13
LED MODULE TYPE
45ms 45ms 45ms 45ms 70ms 750ms
1046.5Hz 1174.7Hz 1318.5Hz
Left seasoning heater
10
Within 1V
12V
Ex) Lock: "Ding-D-Dong" sound
45ms 45ms 45ms 45ms 70ms
5V
0V
5V
0V
1568.0Hz 1318.5Hz
- 17 -
Right seasoning heater
11
Off
750ms
5V
0V
1046.5Hz