LG LRSC26920TT Service Manual page 32

EXPLANATION FOR MICOM CIRCUIT
1-9. Fan motor driving circuit (freezer, mechanical area)
1. The circuit cuts all power to the fan drive IC, resulting in a standby mode.
2. This circuit changes the speed of the fan motor by varying the DC voltage between 7.5 Vdc and 16 Vdc.
3. This circuit stops the fan motor by cutting off power to the fan when it senses a lock-up condition.
1) GR-L267 ****
Motor OFF
Motor ON
COMPRESSOR
-FAN PWM
COMPRESSOR
-FAN LOCK
FREEZER-FAN PWM
FREEZER-FAN LOCK
a , d part b part
5V 2V or less
2 ~ 3V 12 ~ 14V
- 38 -
e part c , f part
2V or less
8 ~ 16V
0 V
0 V