Toner Empty Sensor Circuit | Panasonic KX-P7105, KX-P7110 instruction

KX-P7105 / KX-P7110

4.4.11.5. Toner Empty Sensor Circuit

Toner empty sensor detects the shortage of toner. IC004 ( CPU ) sends the nTECTL ( pin7, IC004 ) signal to Q009. When the nTECTL is low level, transistors Q009 and Q003 are turned on. and LED D517 emits light. If the toner is shorted ( empty ),the light from LED D517 passes through the lens of the Toner Cartridge. When the photo transistor PI451 receives the light, the PI451 is turned on, and the TESEN ( pin4, IC004 ) signal becomes low.

4.4.12. Fan Control Circuit

FANCTL:

1.Full Power Mode

When FANCTL signal ( pin 6, IC004 ) is high, pin 7 of IC002 goes high, transistors Q018 and Q020 are turned on. This supplies +24V Power to Fan motor and rotates the Fan.

2.Reducing Power Mode ( Quiet Mode )

Pulse signal ( see below ) is output from pin 6 of IC004.

This pulse signal is integrated by R137 and C108. Voltage of ( A ) is stabilized at approx. 2V. Pin 6 of IC002 is 0V.

When the voltage of ( B ) is lower than the voltage of ( A ), pin 7 of IC002 goes high, Q018 and Q020 are turned on, then the voltage of ( B ) increases. When the voltage of ( B ) is higher than ( A ), pin 7 of IC002 goes low, Q018 and Q020 areturned off, then voltage of ( B ) decreases. Thus the voltage of ( B ) is controlled almost same as the voltage of ( A ) ( = approx. 2V ). Since the resistor network of R141 and R142 divide the voltage of ( C ) into 1/8, the voltageof ( C ) is controlled approx. 16V ( = 2V x 8 ).

	FAN Control Mode
Mode		FAN Power
Warm Up		Full
Printing		Full
Others		Reduced

FANERR:

This signal is used for detecting whether the rotation of fan motor is proper or not. When the fan motor is not rotating properly or is locked, this signal becomes a high and inputted into pin18 of IC004.

KX-P7105, KX-P7110 specifications

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