Check SiENBE04-512A
132 Service Diagnosis
5.1.3 Thermistor Resistance Check
Check No.6 Remove the connectors of the thermistors on the PCB, and measure the resistance of each
thermistor using tester.
The relationship between normal temperature and resistance is shown in the graph and the
table below.
Thermistor R25°C=20kΩ B=3950
Temperature (°C)
–20 211.0 (kΩ)
–15 150
–10 116.5
–5 88
0 67.2
5 51.9
10 40
15 31.8
20 25
25 20
30 16
35 13
40 10.6
45 8.7
50 7.2
Tester
Resistance range
(R25 = 20kΩ, B = 3950)
(kΩ)
150
100
50
-15 0 15 3045
(R1437)
(°C)
SiENBE04-512A.book Page 132 Friday, October 5, 2007 1:49 PM
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