LG GR-L247WVS Service Manual page 46

EXPLATION FOR MICOM CIRCUIT
1-10. Temperature compensation and over-cool/weak-cool compensation circuit
1. Temperature compensation at freezing room, cold storage room
1) GR-P247, L247, P207, L207
2) GR-C247, B247, C207, B207
Freezing room
Resistance value
(R)J1 (R)J2
6.2 k
5.1 k
3 k
2.4 k
1.2 k
1 k
1.8 k
2.7 k
3.9 k
5.1 k
u Temperature compensation table by adjustment value (difference value against current temperature)
Ex) If changing compensation resistance at a cold storage room (RCR1) from 10 k (current resistance) to 18 k
(modified resistance), temperature at the cold storage will increase by +1°C.
Ex) Now (R)J1= , (R)J2=1.2k , RCRI=5.6k
+2°C for Cold storage room temperature
(R)J1 = 12k
(R)J2 = 12k
RCRI = 5.6k
Temperature Resistance value
compensation
+5 °C
+4 °C
+3 °C
+2 °C
+1 °C
0 °C
-1 °C
-2 °C
-3 °C
-4 °C
-5 °C
1k
18k
(R)J1
(R)J2
Cold storage room
Temperature
(RCR1) compensation
180 k +2.5 °C
56 k +2.0 °C
33 k +1.5 °C
18 k +1.0 °C
12 k +0.5 °C
10 k
8.2 k -0.5 °C
5.6 k -1.0 °C
3.3 k -1.5 °C
2 k -2.0 °C
470 -2.5 °C
want to compensate -2°C for Freezing room temperature and
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: JUMP WIRE
Remarks
Warmly
compensate
0 °C Reference temperature
Coolly
compensate