2. Checking method of transistor module
• Outer appearance and internal circuit of transistor module
1. Drive circuit.
2. Overheating protection circuit.
3. Sensor.
• Procedure:
Remove all the terminals of the transistor module before check. If items (a) to (d) are performing and the results are
satisfactory, the transistor module is normal. Measure it under 1kΩ range of a tester. Do NOT use a digital tester.
a. By touching the + side of the tester to the P terminal of
transistor module and the - side of tester to U, V and W of
transistor module, measure the resistance. If all the resistances
are from 1 to 5kΩ, it is normal.
b. By touching the - side of the tester to the P terminal of
transistor module and the + side of tester to U, V and W of
transistor module, measure the resistance. If all the resistances
are greater than 100kΩ, it is normal.
c. By touching the - side of the tester to the N terminal of
transistor module and the + side of tester to U, V and W of
transistor module, measure the resistance. If all the resistances
are from 1 to 5kΩ, it is normal.
d. By touching the + side of the tester to the N terminal of
transistor module and the - side of tester to U, V and W of
transistor module, measure the resistance. If all the resistances
are greater than 100kΩ, it is normal.
To Next Page
Loading...
