Panasonic KX-P7110, KX-P7105 manual Laser Scanning Unit Control Circuit

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KX-P7105 / KX-P7110

4.4.5.Laser Scanning Unit Control Circuit

The laser unit consists of laser drive circuit and scanner motor drive circuit.

Laser control signals are as follows.

nVIDEO:

This is actual data being printed.

nLDON:

When the nLDON signal is low, the laser unit is activated.

 

When front door is opened, the laser unit is deactivated.

nHSYNC:

This is a horizontal synchronizing signal sent from a timing sensor ( laser beam detect sensor )

 

which detects horizontal position of the laser beam across drum.

nADJUST:

When the nADJUST signal is low, APC ( Auto Power Control ) is activated.

nSNRCTL:

This is a control signal for the scanner motor.

nSNRLD:

The scanner motor speed is maintained at approx. 20K rpm by a PLL ( Phase Locked Loop ).

 

While the scanner motor rotates ( approx. 20K rpm ), nSNRLD is low.

nSNRCLK:

This is a reference clock of the scanner motor ( approx. 2KHz ).

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Contents KX-P7105 KX-P7110 KX-P7105 / KX-P7110 Contents KX-P7105 / KX-P7110 Specifications PrinterPaper Interface, Options, Accessories, and Supplies Others About Media Margins and Print Area Indicators Printer Panel IndicatorsPrint / Reset Button Parts Identification Front Side View Rear Side ViewComponent Layout and Paper Path Electrical Components and Sensor Boards Switches and Solenoids Charge Development / CleaningPrint Process ExposureFusing TransferPaper Feed Media TrayLaser Beam Laser Scan Unit ExposureOperation Theory Cylindrical Lens and Lens Collimator LensPolygon Scanner LensFuser Unit Paper Ejection and Paper Switchback Normal Printing Mode Not Duplex ModeInstallation Requirements SetupKX-P7105 / KX-P7110 Installing the Upgrade Kit for PostScript or RAM Board Repacking Material RequiredKX-P7105 / KX-P7110 KX-P7105 / KX-P7110 Removal and Replacement Procedures Front and Rear CoversFront Cover Disassembly Rear Cover DisassemblyLeft Cover Right, Left and Top CoversRight Cover Top CoverLaser Scanning Unit LSU Relay Board BHigh Voltage Board and Power Supply Unit High Voltage BoardPower Supply Unit Power Supply Unit DisassemblyEngine Control Board Indicator BoardEngine Control Board and Toner Empty Sensor Board Toner Empty Sensor Board Nd Feeder I / F Board and Main Control Board Nd Feeder I / F Board and Main Control BoardFan Motor Main Control Board DisassemblyFuser Drive Gear Gear Support Bracket Relay Board a , Drive Gear Unit and MotorDrive Gear Unit Disassembly Paper Empty Sensor BoardUpper Exit Roller Holder Upper Exit Roller Holder DisassemblyUpper Exit Roller Holder Fuser Unit Disassembly Heat Lamp Heat RollerThermostat KX-P7105 / KX-P7110 Pickup, Paper Feed, Registration and Transfer Rollers Pickup Roller and Pickup SolenoidPaper Feed Roller / Registration Roller Registration RollerTransfer Roller Assembly Auto Duplex Unit ADU Auto Duplex Pinch and Registration RollersAuto Duplex Disassembly KX-P7105 / KX-P7110 KX-P7105 / KX-P7110 Paper Empty Sensor Lever Block Diagram Main Control Board Block DiagramEngine Control Block Diagram Fuser UnitConnection Diagram Connection DiagramPower Supply Engine Control Board Asic KMEReset Circuit Clock CircuitMain Motor Drive Circuit Motor Current will be cut off in case of OFF condition above Laser Scanning Unit Control Circuit Fuser Temperature Control Circuit High Voltage Control Circuit Eeprom Control Circuit Safety Interlock SW Registration Solenoid Driver Circuit Solenoids Control CircuitPickup Control Solenoid Drive Circuit Switchback Solenoid Drive Control Circuit Top Sensor Circuit Sensors CircuitRegistration Sensor Circuit Exit Sensor Circuit Paper Empty Sensor CircuitToner Empty Sensor Circuit Fan Control Circuit2nd Feeder control signals are explained as follows Nd Feeder I / F CircuitKX-P7105 / KX-P7110 Main Control Board Data FlowPower Supply Clock Circuit CPU Asic IC1 overview CPU Sdram I/F SdrasROM I/F FRCS1Eepdata Internal Engine I/F Main Board Engine Board SXDOperation Panel Circuit Parallel I/F USB I/F PCI I/F PcitrdyNetwork I/F only for KX-P7110 TPRDM, TprdpKX-P7105 / KX-P7110 Main Control Board Option ROM CN Option RAM CN Main Control Board 4/9 IEEE1284 Circuit Block Main Control Board 6/9 ICE Connector Power Regulator Circuit Main Control Board KX-P7105 / KX-P7110 Engine Control Board Engine Control Board 2/3 Parts Side 102 Sensors, Indicator and Relay Boards 104 Paper Empty Sensor Board, 2nd Feeder I/F Board 106 Explanation of Connectors 1. CN1 Optional PostScript Upgrade Kit I / F ConnectorCN2 Optional RAM Connector 2. CN2 Optional RAM Connector3. CN3 Network Connector CN2CN4 Ieee 1284 I/F Connector 4. CN4 Ieee 1284 I / F Connector5. CN5 Engine I / F Connector 6. CN6 Front Panel Connector7. CN9 USB I / F Connector 1. CN001 Video Interface4. CN004 2nd Feeder 2. CN002 LSU Control Signals3. CN003 OPC Drum Unit Interlock SW 6. CN006 Door + 24V Interlock SW 5. CN005 PSU-MAIN Connector8. CN008 HVU-MAIN Connector 7. CN007 ThermistorCN010 Polygon Motor CN013 Switchback Solenoid9. CN009 Toner Empty Sensor CN011 Pickup SolenoidCN017 Main Motor 14. CN014 REG-TOP SensorCN015 Exit Sensor CN018 FAN ControlRegistration & Paper Top Sensor Board Paper Exit / ADU Paper Jam Sensor Board1. CN407 Fuser GND Paper Empty Sensor BoardToner Empty Sensor Board 1. CN450 Paper Empty Sensor2. CN453 to 2nd Feeder Nd Feeder I / F Board1. CN452 to Engine Control Board CN004 Component Reference Guide 1. IC1 Main Control CPUIC1 2. IC2 Reset IC GND123. IC3 Flash / Mask ROM 4. IC5 RAM5. IC6 LAN IC IC6 LAN IC6. IC7 Eeprom 7. IC10 Regulator8. IC12 Regulator 1. IC001 Asic 3. IC003 Reset IC 2. IC002 Comparators4. IC004 Engine Control CPU 5. IC005 Eeprom6. IC006 Motor Drive IC 7. IC007 InvertersRecommended Tools Recommended CleaningGeneral Maintenance Tables User MaintenanceLubrication Service Maintenance Maintenance CycleCounter Reset Recommended LubricationSelf-Diagnostic Indicators Printer Status Paper JamUser Error Call for Service Initial Troubleshooting Flowchart No Operation Print Quality White Vertical Line in PrintBlank Print Dark Vertical Line in Print Dark Horizontal Line in Print Dirty Background All-black Print Light Print Ghosting Black or White Dots Toner Spatter Paper Jam Jam at aJam at B Jam at C Jam at D, E Jam at STD Jam at OP Call Service 1. E20156 2. E30 3. E31 4. E32 5. E50 6. E54 7. E71 8. E73 9. E81 10. E90 11. E91 12. E96 Replacement Parts List with Lubrication Guide Exterior168 Right Side Parts 169170 Engine Control Board Connector Pickup Roller and Paper Feed Roller Motor and Drive Gear Unit Left Side Parts Power Supply Unit and High Voltage Board Rear and Top Side Parts Fuser Unit 176177 Bottom Side Parts 178179 Mechanical Base Media Tray Paper Cassette Packing Component Side View Parts Side View Resistors ICsCapacitors Transistor and Diodes 10.9.5 Connectors 10.9.6 Others188 189 190 191 Registration & Paper Top Detection Sensor Board Resistor values is in OHMsRelay Board a Resistor values are in OHMs194
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KX-P7105, KX-P7110 specifications

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