LG LRBN2051 Series, Service Manual

Page: 26 / 50

7-2-7 Temperature Compensation & Overcooling/Undercooling Compensation Circuit
1. Refrigerator Temperature Compensation
2. The temperature compensation for refrigerator compartment is in the following table:
NOTE
: This circuit is designed to input the necessary temperature compensation values into the MICOM. This adjusts the
refrigerator temperature, which is different in each model.
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Refrigerator
Resistance Temperature Remark
(RCR) Compensation
180 K
Ω
+2.5°C Compensation by
56 K Ω +2.0°C
raising the
33 K Ω +1.5°C
temperature
18 K Ω +1.0°C
12 K Ω +0.5°C
10 K Ω 0 °C Standard Temperature
8.2 K Ω -0.5°C Compensation by
5.6 K
Ω
-1.0°C
lowering the
3.3 K Ω -1.5°C
temperature
2 K
Ω
-2.0°C
470 Ω -2.5°C
Revised resistance
470
Ω
2k
Ω
3.3k
Ω
5.6k
Ω
8.2k
Ω
10k
Ω
12k
Ω
18k
Ω
33k
Ω
56k
Ω
180k
Ω
Present resistance
No 0.5°C 1°C 1.5°C 2°C 2.5°C 3°C 3.5°C 4°C 4.5°C 5°C
470
Ω
change Up Up Up Up Up Up Up Up Up Up
0.5°C No 0.5°C 1°C 1.5°C 2°C 2.5°C 3°C 3.5°C 4°C 4.5°C
2k
Ω
Down Change Up Up Up Up Up Up Up Up Up
1°C 0.5°C No 0.5°C 1°C 1.5°C 2°C 2.5°C 3°C 3.5°C 4°C
3.3k Ω Down Down Change Up Up Up Up Up Up Up Up
1.5°C 1°C 0.5°C No 0.5°C 1°C 1.5°C 2°C 2.5°C 3°C 3.5°C
5.6k Ω Down Down Down Change Up Up Up Up Up Up Up
2°C 1.5°C 1°C 0.5° No 0.5°C 1°C 1.5°C 2°C 2.5°C 3°C
8.2k
Ω
Down Down Down Down Change Up Up Up Up Up Up
Refrigerator 2.5°C 2°C 1.5°C 1°C 0.5°C No 0.5°C 1°C 1.5°C 2°C 2.5°C
(RCR) 10k Ω Down Down Down Down Down Change Up Up Up Up Up
3°C 2.5°C 2°C 1.5°C 1°C 0.5°C No 0.5°C 1°C 1.5°C 2°C
12k Ω Down Down Down Down Down Down Change Up Up Up Up
3.5°C 3°C 2.5°C 2°C 1.5°C 1°C 0.5°C No 0.5°C 1°C 1.5°C
18k
Ω
Down Down Down Down Down Down Down Change Up Up Up
4°C 3.5°C 3°C 2.5°C 2°C 1.5°C 1°C 0.5°C No 0.5°C 1°C
33k
Ω
Down Down Down Down Down Down Down Down Change Up Up
4.5°C 4°C 3.5°C 3°C 2.5°C 2°C 1.5°C 1°C 0.5°C No 0.5°C
56k Ω Down Down Down Down Down Down Down Down Down Change Up
5°C 4.5°C 4°C 3.5°C 3°C 2.5°C 2°C 1.5°C 1°C 0.5°C No
180k Ω Down Down Down Down Down Down Down Down Down Down Change
➧
Table of Temperature Compensation by adjusting the
resistance (difference from the current temperature)
e.g., If the refrigerator compensation resistance
(RCR) is changed from 10K (the current resistance)
to 18K (the adjustment resistance), the temperature
of the refrigerator rises 33.8°F(+1°C).