LG LRSPC2031BS Service Manual page 38

MICOM CIRCUIT DESCRIPTION
Description) MICOM Pin No. 41, 42, and 43 terminals send signals of which wave form are shown on the right in 3.33 msec
cycles. These signals pass through input terminals (No. 3, 6, and 8) of motor driving IC6 (TA7774AP) and are sent to
the output terminal (No. 10, 11, 14, 15). These output signals form rotating magnetic on the coils wound on each
phase of stator and motor rotates. When signals are input to INa and INb of motor driving IC (TA774AP), rotating
magnetic forms on the coils wound on each phase of stator and stepping motor damper rotates.
(INa)
(INb)
1-9. Temperature Compensation and Over Cooling/Weak Cooling Compensation Circuit
1. Freezer and refrigerator compartment temperature compensation
Freezer Compartment
Resistance value
(RCF1)
180 kΩ
56 kΩ
33 kΩ
18 kΩ
12 kΩ
10 kΩ
8.2 kΩ
5.6 kΩ
3.3 kΩ
2 kΩ
470 Ω
• Temperature Compensation Table by Resistance Adjustment (the difference compared to the present temperature)
EX) The temperature of refrigerator increases by 1 °C if refrigerator compartment compensation resistance is changed
from 10 kΩ to 18 kΩ.
(reverse rotation)
#8
#3
#6
#15
(A)
#10
(B)
#14
(A)
#11
(B)
Refrigerator Compartment
Temperature Compensation
Temperature
Compensation
+5 °C
+4 °C
+3 °C
+2 °C
+1 °C
0 °C
-1 °C
-2 °C
-3 °C
-4 °C
-5 °C
Freezer Compartment
Temperature Compensation
Refrigerator Compartment
Resistance value
(RCR1)
180 kΩ
56 kΩ
33 kΩ
18 kΩ
12 kΩ
10 kΩ
8.2 kΩ
5.6 kΩ
3.3 kΩ
2 kΩ
470 Ω
- 38 -
(forward rotation)
Temperature
Compensation
+2.5 °C
+2.0 °C
+1.5 °C
+1.0 °C
+0.5 °C
0 °C Reference temperature
-0.5 °C
-1.0 °C
-1.5 °C
-2.0 °C
-2.5 °C
Remarks
Compensate to
warm
Compensate to
cool