Fuser Temperature Control Circuit | Panasonic KX-P7100 instruction

KX-P7100

4.4.10. Fuser Temperature Control Circuit

The fuser temperature is controlled by IC11 ( Engine CPU ). IC11 has an analog to digital ( A/D ) converter ( AN0-AN7 ). Thermistor TH is connected to IC11 ( AN0 ). When IC11 ( Pin31 ) is low, Q7 is turned off. And Q4 is turned on. ThenHeat lamp inside fuser unit is turned on.

Abnormal temperature detection circuit consists of the following 2 sub-sections.

1.Abnormally Low Temperature Detection

Abnormally low temperature is detected by IC11 ( Engine CPU ) programming.

2.Abnormally High Temperature Detection

Abnormally high temperature is detected by IC11 ( Engine CPU ) programming. When front door is opened, the fuser lamp is shut off.

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Panasonic KX-P7100 manual Fuser Temperature Control Circuit

Contents

KX-P7100 KX-P7100 Contents Printer Specifications Paper Interface, Options, Accessories, and Supplies Others About Media Margins and Print Area Printer Panel Indicators / Button Indicators KX-P7100 Front Side View Rear Side View Parts Identification Component Layout and Paper Path Electrical Components and Sensor Boards Switches and Solenoids Print Process Development / CleaningCharge Exposure Transfer Fusing Media Tray Paper Feed Operation Theory Laser Scan Unit ExposureLaser Beam Polygon Scanner Collimator LensCylindrical Lens and Lens Lens Fuser Unit Normal Printing Mode Not Duplex Mode Paper Ejection and Paper Switchback Setup Installation Requirements KX-P7100 Material Required Repacking KX-P7100 KX-P7100 Front and Rear Covers Removal and Replacement Procedures Rear Cover Disassembly Front Cover Disassembly Right Cover Right, Left and Top CoversLeft Cover Top Cover Relay Board B Laser Scanning Unit LSU High Voltage Board High Voltage Board and Power Supply Unit Power Supply Unit Disassembly Power Supply Unit Main Controller Board and Fuser Drive Gear Indicator Board and Toner Empty Sensor BoardMain Controller Board Fuser Drive Gear Fan Motor Gear Support Bracket Gear Support Bracket, Motor and Drive Gear UnitDrive Gear Unit and Motor Drive Gear Unit Disassembly Upper Exit Roller Holder Upper Exit Roller Holder DisassemblyUpper Exit Roller Holder Fuser Unit Disassembly Heat Roller Heat Lamp Thermostat KX-P7100 Pickup Roller and Pickup Solenoid Pickup, Paper Feed, Registration and Transfer Rollers Registration Roller Paper Feed Roller / Registration Roller Transfer Roller Assembly Auto Duplex Pinch and Registration Rollers Auto Duplex Unit ADU Auto Duplex Disassembly KX-P7100 KX-P7100 Block Diagram Electronic Circuit Description and Diagrams Connection Diagram Connection Diagram Power Supply Main Control CPU Main Control Board Dram I/F GDI Asic IC3 Dram USB Chip Asic KME Clock Reset Circuit Main 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 Pickup Control Solenoid Drive Circuit Solenoids Control CircuitRegistration Solenoid Driver Circuit Switchback Solenoid Drive Control Circuit Registration Sensor Circuit Sensors CircuitTop Sensor Circuit Exit Sensor Circuit Fanctl Fan Control Circuit Pprdy Internal Engine I / F Control CPU Engine CPU Timing Chart Engine I / F Communication Main Control Board POWER+5V GND+24V POWER+5VLD POWER+5V Usol Pusolctl Puctl Sensors, Indicator and Relay Boards KX-P7100 Main Board 3. CN3 LSU Control Signals1. CN1 to Front Panel 2. CN2 OPC Drum Unit Interlock SW 5. CN6 Centronics Parallel I / F 4. CN4 USB I / F Connector 9. CN10 HVU-MAIN Connector 6. CN7 PSU-MAIN Connector7. CN8 Door + 24V Interlock SW 8. CN9 Thermistor 10. CN11 Polygon Motor CN14 Switchback SolenoidCN12 Pickup Solenoid CN13 Registration Solenoid CN18 Main Motor 15. CN16 Exit SensorCN19 FAN Control CN20 Toner Empty Sensor Registration & Paper Top Sensor Board Indicator BoardPaper Exit / ADU Paper Jam Sensor Board 1. CN451 Toner Empty Sensor Toner Empty Sensor Board IC2 Inverters IC1 Main Control CPU MA9 IC3 GDI Asic VSS1 GND IC5 Dram Rsto OUT IC6 Asic IC8 USB Chip IC10 Reset ICIC9 Comparators 10. IC12 Eeprom IC11 Engine Control CPU 12. IC15 Inverters 11. IC14 Motor driver IC Maintenance Tables Recommended CleaningUser Maintenance General KX-P7100 Counter Reset Service Maintenance Maintenance CycleLubrication Recommended Lubrication Printer Status Paper Jam Self-Diagnostic Indicators User Error Call for Service Initial Troubleshooting Flowchart No Operation White Vertical Line in Print Print Quality Blank 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 Media Tray Empty or Misfeed Paper Jam Jam at a Jam at B Jam at C Jam at D, E 1. E20 Call Service 119 2. E30 3. E31 4. E32 5. E50 6. E54 7. E71 8. E73 9. E81 Exterior Replacement Parts List with Lubrication Guide 127 128 Right Side Parts Main Controller 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 134 Fuser Unit 135 136 Bottom Side Parts 137 Mechanical Base Media Tray Paper Cassette Packing Component Side View Parts Side View Capacitors ICs All resistor values are in OHMs Resistors Transistor and Diodes Others Connectors Resistor values is in OHMs Registration & Paper Top Detection Sensor Board Resistor values are in OHMs Relay Board a