Panasonic KX FLB758RU User Manual

							7.6.1. FAN CONTROL
This unit is equipped with fan to prevent the develop ing device from rising in temperature while printing.
The air is inhaled from the left side of the unit.
The fan rotates at high speed (typ. 4800 rpm) while printing (controlling the develop ing device). After printing is finished , it
rotates at low speed (typ. 2400) rpm when the temperature of the unit goes up over a fixed one or depend ing on the number
of printed papers (frequency).
W hile the fan is rotating at high speed, the voltage of 24 V is supplie d to the fan, however, while rotating at low speed, the
supply voltage is decreased to 12V.
Each signal wave is as follows:
1. High-speed rotation (typ. 4800 rpm)
2. Low-speed rotation (typ. 2400 rpm)
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							7.7. SOLENOID DRIVE SECTION
The solenoid drive circuit controls the pick-up clutch.
The solenoi d is designe d to be driven by +24V, driven by IC610-79 pin.
Diode D603 protects Q615 from backward voltage when the solenoi d is driven.
ModeIC606-149 pin
SOLENOID ONhigh level
SOLENOID OFFlow level
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							7.8. LSU (Laser Scanning Unit) SECTION
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							7.9. SENSORS AND SWITCHES SECTION
All of the sensor and switches are shown below.
Sensor Circuit LocationSensorSensor or Switch NameMessage Error
ADF Relay BoardPS500Document[CHECK DOCUMENT]
RF Sensor BoardPS501Paper Feed[REMOVE DOCUMENT]
High Voltage BoardSW 101Printer Open[COVER OPEN]
ADF Relay BoardSW 501ADF Cover Open————
ADF Relay BoardSW 500FB Cover Open————
ADF Relay BoardPS502CIS Position (ADF Home)————
CIS Sensor BoardPS503CIS Position (FB Home)————
High Voltage Board——OPC Set[CHECK DRUM]
High Voltage BoardPC201Register[FAILED PICK UP]
Motor Driver BoardPS1Paper[OUT OF PAPER]
Exit Sensor BoardPS50Exit[PAPER JAMMED]
Analog BoardPS201Toner[TONER EMPTY]
[TONER LOW ]
[CHANGE DRUM]
Analog BoardSW 200Hook————
Note:See TEST FUNCT IONS - SENSO R CHECK SECTIO N for the sensor test.
(#815 of Service Mode test. Refer to TEST FUNCTIONS(P.74).)
7.9.1. HOOK SWITCH
W hen the handse t is raised, the switch is turned ON, and the signal at pin 57 of IC606 is low.
W hen the handse t is returned, the switch is turned OFF, and the signal at pin 57 of IC606 is high.
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							7.9.2. DOCUMENT SENSOR....”CHECK DOCUMENT” AND PAPER FEEDSENSOR....”REMOVE DOCUMENT”
These Sensors detect whether or not a document is in place. W hen a document is detected, the shelter plate let the sensor light
pass through, the photo-transistor turns ON, and the input signal of IC610-118pin /IC610-119pin becomes a low level.
W hen there is no document, the shelter plate shuts off the sensor light, the photo-transistor turns OFF, and the input signal of
IC610-118pin /IC610-119pin becomes a high level.
Document Sensor
PhototransistorSignal(IC610 - 118pin)
No DocumentOFFHigh level
Document SetONLow level
Paper Feed Sensor
PhototransistorSignal(IC610 - 119pin)
No Read PositionOFFHigh level
Read PositionONLow level
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							7.9.3. CIS POSITION SENSOR
These Sensors detect whether or not CIS is in home position .
W hen the CIS is detected, the shelter plate shuts off the sensor light, the photo-transistor turns OFF, and the input signal of
IC610-100pin /IC610-101pin becomes a high level.
W hen there is no CIS, the shelter plate let the sensor light pass through, the photo-transistor turns ON, and the input signal of
IC610-100pin /IC610-101pin becomes a low level.
ADF Home Sensor
PhototransistorSignal(IC610 - 100pin)
Home positionOFFHigh level
Not Home positionONLow level
FB Home Sensor
PhototransistorSignal(IC610 - 101pin)
Home positionOFFHigh level
Not Home positionONLow level
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							7.9.4. ADF COVER OPEN SWITCH
The Switch detects whether the ADF cover is open or closed.
W hen the ADF cover is closed, the switch turns ON, and the input signal of IC610-116pin becomes a low level.
W hen the ADF cover is open, the switch turns OFF, and the input signal of IC610-116pin becomes a high level.
SwitchSignal(IC610 - 116pin)
OpenOFFHigh level
CloseONLow level
7.9.5. FB COVER OPEN SWITCH
The Switch detects whether the Flat Bed cover is open or closed.
W hen the Flat Bed cover is closed, the switch turns ON, and the input signal of IC610-117pin becomes a low level.
W hen the Flat Bed cover is open, the switch turns OFF, and the input signal of IC610-117pin becomes a high level.
SwitchSignal(IC610 - 117pin)
OpenOFFHigh level
CloseONLow level
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							7.9.6. TOP COVER OPEN SWITCH....”COVER OPEN”
The Switches detect whether the printer cover is open or closed.
W hen the printer cover is closed, the switches turn ON, and the input signal of IC604-U4 pin becomes a high level.
W hen the printer cover is open, the switches turns OFF, and the input signal of IC604-U4 pin becomes a low level.
SwitchSignal (IC604-U4 pin)
OpenOFFLow level
CloseONHigh level
7.9.7. DRUM SENSOR....”CHECK DRUM”
The Switch detects whether the DRUM unit is set or not.
W hen there is the DRUM unit, the input signal of IC604-V1 pin becomes a low level.
W hen there is no DRUM unit, the input signal of IC604-V1 pin becomes a high level.
Signal (IC604-V1 pin)
DRUM SetLow level
No DRUMHigh level
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							7.9.8. REGIST SENSOR.....”FAILED PICK UP”
The Sensor detects whether or not the recording paper is present so that printing can start.
W hen the recording paper is detected, the shelter plate let the sensor light passing through, the photo-transistor turns ON, and the
input signal of IC610-154 pin becomes a low level.
W hen there is no recording paper, the shelter plate closes the sensor light, the photo-transistor turns OFF, and the input signal of
IC610-154 pin becomes a high level.
Photo-transistorSignal (IC610-154 pin)
No Recording PaperOFFHigh level
Recording Paper RegistONLow level
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