Check
SiBE05-722_B
113
Service Diagnosis
RK(X)S25/35G2V1B9, RXS25/35J2V1B
1. Check that the voltage between the pins 10 - 11 is 15 VDC.
2. Check if the Hall IC generates the rotation pulse (0 ~ 15 VDC) 4 times between the pins 10 -
12, 10 - 13, when the fan motor is manually rotated once.
5.12 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.
If NG in step 1
Æ
Defective PCB
Æ
Replace the PCB.
If NG in step 2
Æ
Defective Hall IC
Æ
Replace the fan motor.
If OK in both steps 1 and 2
Æ
Replace the PCB.
The connector has 3 pins.
13
12
11
10
9
8
7
6
5
4
3
2
1
S70
Phase U
15 VDC
Phase V
Phase W
HU (Hall IC)
HV (Hall IC)
Free pin
Free pin
Free pin
Free pin
Free pin
Free pin
(R11907)
1
Gray (power supply)
Purple (signals)
Blue (grounding)
2
3
(R14211)
S7
