Sharp SJ-XF50X-T

SJXF50XT
22
FORCED STOPPING OF DOOR ALARM BUZZER2.
* Used when the door switch is faulty.
How to stop
While the door-open buzzer sounds, press the [•
冷蔵室
] and [
冷凍室
] buttons simultaneously and hold them for 3
seconds or longer. (The buzzer sounds three times.)
Forced stopping is cancelled automatically 48 hours later.
THERMISTOR CIRCUIT CHECK METHOD3.
A thermistor is a semiconductor for which the resistance value changes as the temperature changes.•
This characteristic is used to allow the temperature to be read by a microcomputer.•
(Temperature Resistance value Changed to voltage.)
Check Method1-1.
Disconnect the connectors and measure the thermistor resistances.•
Determination Method1-2.
If the resistance[1] matches, there is a problem with the electronic circuit board.•
If the resistance[1] is different,there is a problem with the harness, connector, or thermistor.•
[ 1 ]
CN8 ⑫
- ⑬
CN8 ⑭
- ⑮
CN16
③ - ①
CN10 ④
- ③
CN8 ④
- ⑤
CN10 ② - ③
Humidity sensor
Ice cubemaker thermistor
F-thermistor
DEF thermistor
R-thermistor
V-thermistor
External air temperature
thermistor
Resistance Value
*1
(Ω)
pins pins
pins
pins
pins
pins
pins
Voltage Value (V)
*2
CN15 ⑥ - ⑤
*1. Disconnect connectors and measure the pins on the wiring side(Ω).
Connector
IC1
+
+5V
[1]
Thermistor
Microcomputer
(A/D)
Table of Thermistor Characteristics1-3.
[1]
- 30.0
- 25.0
- 20.0
- 15.0
- 10.0
- 5.0
0.0
5.0
10.0
15.0
20.0
25.0
30.0
35.8
26.1
19.3
14.4
10.9
8.3
6.4
5.0
3.9
3.1
2.5
2.0
1.6
[1]
- 30.0
- 25.0
- 20.0
- 15.0
- 10.0
- 5.0
0.0
5.0
10.0
15.0
20.0
25.0
30.0
35.8
26.1
19.3
14.4
10.9
8.3
6.4
5.0
3.9
3.1
2.5
2.0
1.6
[1]
- 30.0
- 25.0
- 20.0
- 15.0
- 10.0
- 5.0
0.0
5.0
10.0
15.0
20.0
25.0
30.0
83.9
61.2
45.2
33.7
25.5
19.5
15.0
11.7
9.2
7.3
5.8
4.7
3.8
- 30.0
- 25.0
- 20.0
- 15.0
- 10.0
- 5.0
0.0
5.0
10.0
15.0
20.0
25.0
30.0
[1]
F-thermistor
R-thermistor
V-thermistor
DEF thermistor Humidity sensor
Ice cube maker
thermistor
External air
temperature thermistor
Temperature
Resistance
value
Temperature
Resistance
value
Temperature
Resistance
value
Temperature
Resistance
value
Voltage
value
(kΩ)
(°C)
(kΩ)
(°C)
(kΩ)
(°C)
(kΩ)
25.4
19.5
15.1
11.8
9.4
7.5
6.0
4.9
4.0
3.3
2.7
2.2
1.9
[1]
Resistance
value
(kΩ)
(°C) (V)
-
-
-
-
-
-
-
-
0
10
20
30
40
50
60
70
80
90
100
-
-
0.1
0.4
0.7
1.0
1.3
1.5
1.8
2.1
33.1
25.6
20.0
15.8
12.5
10.0
8.1
2.4
2.7
3.0
Temperature
(°C)
- 30.0
- 25.0
- 20.0
- 15.0
- 10.0
- 5.0
0.0
5.0
10.0
15.0
20.0
25.0
30.0
Temperature
(°C)