Daewoo FRN-U20DAI, Service Manual

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27
CONTENTS REMARKS
■ FRS(N)-U20DA
[F-sensor (A)]
1) It senses the temperature of freezer compartment and control Comp., F-fan ON/OFF
2) How it works;
-19
℃
-16
℃
-11
℃
Working Temp.
≒
3.24V
≒
9.32
㏀
Low ON
≒
2.73V
≒
2.93V Sensing Voltage
≒
15.58
㏀ ≒
15.19
㏀
Resistance
High OFF Mid OFF Working Point
[R-sensor (B)]
1) It senses the temperature of refrigerator compartment and control R-fan ON/OFF
2) How it works;
3.2
℃
5.2
℃
7.7
℃
Working Temp.
≒
2.96V
≒
23.33
㏀
Low ON
≒
2.72V
≒
2.83V Sensing Voltage
≒
24.76
㏀ ≒
24.05
㏀
Resistance
High OFF Mid OFF Working Point
[D-sensor (C)]
1) It senses return point of defrosting heater.
2) How it works;
13
℃
Working Temp.
≒
3.08V
≒
22.56
㏀
Return point of defrosting heater
Sensing Voltage
Resistance
Working Point
* In case temperature of refrigerator compartment is weak or insufficient,
though comp. and R-fan operate in normal way;
1) Cut J18 on the M-PCB, then temp. is lowered 1.5
℃
than [Mid OFF point]
2) Cut J18 and J19 on the M-PCB, then the temp, is lowered 3
℃
IC1
(MICOM)
Compensation of
R-sensor ON/OFF temp.
A
B
C
D