Service manual

Check SiBE05-312
110 Service Diagnosis
5.1.13 Hall IC Check
Check No.16 1. Check the connector connection.
2. With the power ON, operation OFF, and the connector connected, check the following.
*Output voltage of about 5 V between pins 1 and 3.
*Generation of 3 pulses between pins 2 and 3 when the fan motor is operating.
Failure of (1)
→
faulty PCB
→
Replace the PCB.
Failure of (2)
→
faulty hall IC
→
Replace the fan motor.
Both (1) and (2) result
→
Replace the PCB.