SIE-86
Check
Service Diagnosis
79
6.1.3
Thermistor Resistance Check
No.5
Check No.5
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.
For the models whose thermistor is directly equipped on the printed circuit board;
Thermistor R25˚C=20k
Ω
B=3950
Temperature (˚C)
-20
211.0 (k
Ω
)
-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
Remove the signal receiver and the display printed circuit board (disconnect the
connector too), and then measure ohm by an ohmmeter at the both ends.
The relation between temperature and resistance is in common with the existing
models.
R1T
Tester
Si-86.book Page 79 Friday, June 23, 2000 10:26 AM
