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KX-MB2110RUW/ KX-MB2130RUW/ KX-MB2170RUW/ KX-MB2117RUB/ KX-MB2137RUB/ KX-MB2177RUB
6.9.3.2.
Full Speed Mode
In full speed mode, IC300_pinK25 outputs constant 3.3V.
When Q603 is turned on, Vo becomes approx 20V (approx.4V drops between R616).
So the voltage between R624 is determined as follows
When Q603 is turned on, Vo becomes approx 20V (approx.4V drops between R616).
So the voltage between R624 is determined as follows
VL=Vo*R624/(R623+R624)=20*22K/(150K+22K)=2.5(V)
Since IC504_pin2 is 3.3V and IC504_pin3 is 2.5V, pin1_IC504 is always "L".
Consequently Q603 is always turned on, and then approx 20V is supplied to FAN motors.
Therefore FAN rotates with full speed.
Consequently Q603 is always turned on, and then approx 20V is supplied to FAN motors.
Therefore FAN rotates with full speed.
6.9.3.3.
FAN stop
When IC300_pinK25 is "L", Q603 is turned off, then both FAN stop rotation.
6.9.3.4.
Rotation detect signal
During the FAN rotation, the pulse signal is output from pin 2 of FAN motors as the rotation detects signals.
If the period of the pulse is wider than predetermined value, it is judged that FAN error occurred.
Then display shows "Call Service 4".
If the period of the pulse is wider than predetermined value, it is judged that FAN error occurred.
Then display shows "Call Service 4".
6.9.4.
Control table
FANON1
(IC300_pin
K25
)
FAN mode
H
Full speed
Pulse
Half speed
L
Stop
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