Muratec F-114P service manual Sensor input circuit

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Product spec and feature

2.2.4.4 Sensor input circuit

1) Paper Empty Sensor

The Paper Empty sensor (Photo Interrupter) on the SMPS/HVPS PBA is monitored by the CPU on signal(nP_EMPTY, CN3-Pin 1). When the cassette is empty the printer displays a message on the LCD panel.

2) MP Sensing

Presence of paper in the MP tray is detected by operation of the MP Sensor (Photo Interrupter) on the SMPS/HVPS PBA. The CPU monitors signal(MP_EMPTY, CN3-Pin 13) to recognize paper in the MP, and paper is fed from MP if there is paper present.

3) Paper Feed Sensor, (Toner Cartridge Sensor)

When paper passes the actuator on the feed sensor, it is detected by the Photo interrupter. signal(nP_FEED, CN3-Pin 2) monitored by the CPU and this signal starts the process of creating the image after certain delay time If the feed sensor is not detected within 1 sec. after paper is fed, a paper Jam0 occurs. (Displayed on the LCD panel).

When a toner cartridge is inserted it also operates the Paper Feed sensor. A message is displayed on the LCD if no cartridge is detected.

4) Paper Exit Sensor

This detects that paper exits cleanly from the Machine using an exit sensor on the engine board and actuator on the frame. The monitors signal(P_EXIT, CN3-Pin 26) and detects the on/off time of the exit sensor and if jam status is detected then JAM2 is displayed the on the LCD panel.

5) Cover Open Senser

The Cover open sensor actuator is located on the front cover and the senor is in the main frame. When the front cover is opened the +24VS to the DC fan, solenoid, main motor, polygon motor part of LSU, HVPS that are cut off. The CPU monitors signal(COVER_OPEN) to recognize when the cover is opened.

6) DC FAN / SOLENOID Driving

It is driven by a transistor and controlled by signal(FAN, CN3-Pin 24) bit of the CPU.

When it is high the fan is activated by turning on the TR, and it is off when the sleep mode is selected. There are two solenoids and these are driven by the Paper Pick-up and MP signals. The drive time is 300ms. The diode protects the driving TR from the Back-EMF pulse which is generated when the solenoid is de-energized.

7) Motor Driving

The motor driving circuit is activated when the Driver IC is enabled. An A3977 (Motor driver IC) is used in this case. The resistance Rs value of sensing and the voltage value of the V reference can be changed by the motor driving voltage value.

Service Manual

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Contents 114 / F-114P Page Contents Alignment & Troubleshooting Exploded Views & Parts Lists Page Safety Warning PrecautionsToxic material Electric Shock and Fire Safety PrecautionsAssembly / Disassembly Precautions Handling PrecautionsDisregarding this warning may cause bodily injury Be careful with the high temperature partESD Precautions Page Product Specifications Product specification and featureFcot Items 114Series SPL Twain Front View Summary of ProductPrinter Components Items 114Series Control Panel Product spec and feature Overview of System Smps Board & Hvps Board Feeding section System LayoutTransfer Ass’y Driver Ass’yScan Image Controller 3.4e Safety FeaturesCIS Driver Circuit Tx Driver CircuitLSU Laser Scanner Unit Toner Cartridge Main Pbaspl Model Flash Memory Asic Chorus2Sdram Main function blockSensor input circuit Smps & Hvps HVPSHigh Voltage Power Supply Rated Power Output Smps Switching Mode Power SupplyConsumption Power Length of Power Cord 1830 ± 50mm Power Switch FittedFuser AC Power Control Feeding Engine F/WDrive TransferError Type FusingOPE PBA 6.5 LSUPage Whenever servicing the machine, you must perform as follows General Precautions on DisassemblyReleasing Plastic Latches Rear Cover White Roller Ass,ySide Cover R Side Cover LOPE Unit Remove the seven screws securing the OPE PBA and remove it ADF Rubber Pad Exit Roller CISFront Cover Assy Scan Assy Scan Motor Assy ADF Roller Sub Hook PBA DC-Fan Drive AssyExit Cover Assy Engine Shield Assy LSU-UnitMain PBA Smps Unplug one connectorFuser Assy Unwrap the Thermister Harness, as shown below Transfer Assy Feed Assy Remove the Feed Gear1 Assy Solenoid Pick up AssyPage Paper path Alignment and AdjustmentsCopy & Scan Document Path ADF PartEngine Part Printer Paper PathBypass Jam Clearing Paper JamsPaper Jam1 2.1a Input Misfeed Clearing Document Jams2.1b Exit Misfeed Message Location of Jam Clearing Paper JamsAlignment & Troubleshooting Paper Exit Area Fuser Area or Around the Toner Cartridge Tips for Avoiding Paper Jams Bypass TrayReports Advanced Fax Fax Feature Paper Setting Copy Setup Fax SetupSound/Volume Machine Setup Maintenance User ModeSF-565PRHow to Enter Tech Mode Tech ModeTo enter the Tech mode Tech Mode settings mapMethod Data SetupFlash Upgrade Machine Test Switch TestProtocol List ReportDiagnostic Engine Test ModeTo enter the Engine Test Mode To enter the Engine Test mode Identify Sale Date Component Replacement Cycle Consumables and Replacement PartsRoller Abnormal image period Kind of abnormal image Abnormal Image Printing and Defective RollerError Messages Low Heat Error Line ErrorOpen Heat Error LSU ErrorNo PaperAdd Paper NO. Not AssignedOperation NotAssigned Paper Jam 0Open/Close DoorProcedure of Checkig the Symptoms TroubleshootingVertical Black Line and Band Cause and solution of image qualityVertical White Line Horizontal Black Bands Black/White Spot Digital Printer Light ImageDark image or Black Uneven Density Background Ghost1 Ghost Description Ghost occurs at 66.3 or 75.5 mm intervals Digital Printer Stains on the Face Digital Digital Pri Digital Printer Stains on BackBlank Page Print out Blank Page Print out No Dial Tone Fax & Phone ProblemsDefective MF Dial Defective FAX FORWARD/RECEIVE Defective FAX Forward Defective FAX Receive Defective FAX Receive Defective FAX Receive Defective FAX Receive Defective Automatic Receiving FAX ModeWhite Copy Copy ProblemsBlack Copy Abnormal noise Defective Image Quality Wrong Print Position Paper Feed problems Causes and SolutionsJAM PTL Feed JAM Toner Cartridge Multi-Feeding Paper rolled in the fuser Paper rolled on the OPC Drum Fuser Error Printer Faults Causes and SolutionsLSU Error Fuser gear melts due to overheating causing Paper Jam Paper Empty Paper Empty without indication Cover Open No error message when the cover is open Defective motor operation No Power Printed Vertical Lines become curved Precautions on Safe-keeping of Toner Cartridge Toner Cartridge ServiceService for the Life of Toner Cartridge 6.2a Redistributing TonerError messages in the LCD window related to toner Standard of guarantee for consumable partsEnded Signs and Measures of Poor toner cartridgeFault Signs Cause & Check Solution Fault Signs Cause & Check Solution Ghost & Image Printer is not working Software Problems Causes and SolutionsAbnormal Printing Spool Error How to delete the data in the spool manager Page Contents View Top Cover Exploded View OPE Ass’y Exploded View Scan Upper Ass’y Exploded View Main Frame Exploded View ServiceFuser Unit Exploded View Exit Cover Exploded View Cassette Unit Exploded View Page System Diagram Connection Diagram DVMDigital Volt Meter Tool for TroubleshootingHvps Acronyms and AbbreviationsLCD Select a location for the printer A4 ISO 19752 Standard Patterns Sample Tests PatternsPage Page Muratec America, Inc
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