Service manual

Check SiEBE12-625
248 Service Diagnosis
6.1.15 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) Æ faulty PCB Æ Replace the PCB.
Failure of (2) Æ faulty Hall IC Æ Replace the fan motor.
Both (1) and (2) result Æ Replace the PCB.
The connector has 3 pins, and there are two patterns of lead wire colors.
Gray (power supply)
Blue (grounding)
Purple (signals)
White (power supply)
White with black line(signals)
White with manufacturer mark (grounding)
1
2
3
1
2
3