SJPT55RHS
6 – 3
4. Check whether the temperature (resistance value) shown by R-thermistor is correct or not. (Refer to the table below.)
• Detach the connector “CN9/CN309” on the PWB and measure the resistance value between 1 and 2 pins.
5. Check whether the temperature (resistance value) shown by Def-thermistor is correct or not. (Refer to the table below.)
• Detach the connector “CN10/CN310” on the PWB and measure the resistance value between 6 and 7 pins.
6. Check whether the temperature (resistance value) shown by F-thermistor is correct or not. (Refer to the table below.)
• Detach the connector “CN10/CN310” on the PWB and measure the resistance value between 4 and 5 pins.
[5] CONVERSION TABLE BETWEEN TEMPERATURE AND RESISTANCE VALUE
1. R-thermistor, F-thermistor
2. Def-thermistor
Varistor
Normal (over approx.1.8M
Ω
)
Damage
Fuse
Melting
Flow of excessive current is considerable for some rea-
sons.
Check for any portion to cause short circuits especially on
the primary circuit.
There is a possibility of excessive voltage applied from out-
side with the factor such as thunder etc. When repeated with a
factor other than thunder, there might be the apparatus near
by generating noises.
Conduction
Fuse and varistor are normal.
Possibility to be caused by excessive current or voltage
near the power supply is low. Proceed to the other check
item.
-
Temperature
(
°
C)
Resistance Value
(K
Ω
)
Temperature
(
°
C)
Resistance Value
(K
Ω
)
Temperature
(
°
C)
Resistance Value
(K
Ω
)
-25
26.1
-9
10.3
7
4.52
-24
24.54
-8
9.75
8
4.3
-23
23.08
-7
9.24
9
4.1
-22
21.72
-6
8.76
10
3.91
-21
20.46
-5
8.3
11
3.73
-20
19.27
-4
7.87
12
3.56
-19
18.16
-3
7.47
13
3.4
-18
17.13
-2
7.09
14
3.24
-17
16.16
-1
6.74
15
3.1
-16
15.25
0
6.4
20
2.47
-15
14.4
1
6.08
25
1.99
-14
13.6
2
5.78
30
1.61
-13
12.85
3
5.5
35
1.31
-12
12.15
4
5.23
40
1.08
-11
11.49
5
4.98
-10
10.88
6
4.74
Temperature
(
°
C)
Resistance Value
(K
Ω
)
Temperature
(
°
C)
Resistance Value
(K
Ω
)
Temperature
(
°
C)
Resistance Value
(K
Ω
)
-25
61.17
-9
24.13
7
10.58
-24
57.51
-8
22.85
8
10.09
-23
54.1
-7
21.65
9
9.61
-22
50.92
-6
20.52
10
9.16
-21
47.94
-5
19.46
11
8.74
-20
45.17
-4
18.46
12
8.34
-19
42.57
-3
17.51
13
7.96
-18
40.14
-2
16.63
14
7.6
-17
37.86
-1
15.79
15
7.26
-16
35.74
0
15
20
5.79
-15
33.74
1
14.26
25
4.66
-14
31.87
2
13.55
30
3.77
-13
30.12
3
12.89
35
3.08
-12
28.48
4
12.26
40
2.52
-11
26.94
5
11.67
-10
25.49
6
11.11
