Operation Board Section | Panasonic KX-FT21RS guide

KX-FT21RS

2.3.4.6.Operation Board Section

1.No key operation

2.No LCD indication

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Image 69

Panasonic KX-FT21RS manual Operation Board Section, No key operation No LCD indication

Contents

KX-FT21RS Contents For Service Technicians Safety PrecautionsBattery Caution Insulation Resistance Test AC Caution Personal Safety Precautions Moving Sections of the UnitLive Electrical Sections General FeaturesFacsimile Integrated telephone system Optional Accessories Specifications Ccitt No Test Chart Location of Controls OverviewControl Panel Connections Installation Installing the Recording PaperDocument Stacker # , then Setting Your LogoExample Bill Press START/COPY/SET Documents you can send To select characters with the dial keypad Maintenance Items and Component Locations Maintenance Check ITEMS/COMPONENT LocationsOutline Maintenance List Maintenance Cycle Disconnect the power cord and the telephone Maintenance Cleaning the Document Feeder UnitClean the document feeder rollers, sub roller Line cord Cleaning the Thermal Head Cleaning the Pick UP RollerRefer to 4 Disassembly Instruction Troubleshooting Summary TroubleshootingPrecautions User Recoverable Errors Document Jam Starting Troubleshooting Troubleshooting Details Simple Check List Troubleshooting Items Table No document feed ADF Auto Document Feed Section Paper JAM Multiple feed Skew Image is distorted When printing Black or white vertical lines appear Skewed receiving image KX-FT21RS KX-FT21RS Facsimile section Communication Section Defective facsimile section Transmit problem Sometimes there is a transmit problem Check Document Paper JAM Reception problem Unit can copy, but cannot transmit/receive Erroneous detection due to an echo or echo canceler Echo/Echo CancelerCause and Countermeasure Countermeasure a Causes and Countermeasures Cause aCause B Countermeasure B Reception Operation Transmission Operation How to output the Journal Report TX=TRANSMISSION RX=RECEPTION Countermeasure KX-FT21RS KX-FT21RS KX-FT21RS KX-FT21RS KX-FT21RS KX-FT21RS KX-FT21RS Hint Remote programming KX-FT21RS YES/NO Program Mode Table 996 Journal Digital Board Section Please refer to the 2.3.4.3.1. Digital Block Diagram Digital Block Diagram KX-FT21RS Normal Wave Patterns Pin No. Diagram KX-FT21RS KX-FT21RS NG Example Check the Status of the Digital Board Analog Board Section Defective ITS Integrated Telephone System Section Key components for troubleshooting Power Supply Board Section Troubleshooting Flow Chart KX-FT21RS Broken parts repair details D101, D102, D103, D104 No key operation No LCD indication Operation Board Section Sensor Section Check the document sensor PS1Check the read position PS2 Refer to 6.4.4. Scanning Block Read Section KX-FT21RS Refer to 6.4.3. Thermal Head Thermal Head Section Programming and Lists OperationOperation Flow Above values are the default values 3ALL Service Function Table See 2.6.1. Printout Example Service Mode Settings Example of a printed out list Other Test Functions Dtmf Signal Tone Transmit Selection Button Code TablePrint Test Pattern Compression Code MH/MR DescriptionsMslt means Minimum Scan Line Time. Used only at the factory EQM Printout Example Adjusting the Feed Pressure Adjustments Disassembly Instructions KX-FT21RS KX-FT21RS KX-FT21RS KX-FT21RS KX-FT21RS KX-FT21RS KX-FT21RS KX-FT21RS KX-FT21RS KX-FT21RS Preparation Flat Package IC Removal Procedure KX-FT21RS Connection Diagram Codec IC5 D/A converter General Block Diagram AC220V +24V +5V256k Block Diagram Control Section100 Decodes the address Asic IC1Execute modulation and demodulation for the FAX Transmits the recorded data to the thermal head 102 103 Vddc 104 Reset Circuit ROM IC2RAM IC3 Sram and RTC Back UP Circuit FunctionCircuit Operation Supervision Circuit for the Thermal Head Temperature LED Arraycis Image Data Flow During Facsimile Operation Facsimile SectionCopy Fine, Super-Fine, Half Tone Transmission Analog Block DiagramFront/End Head 110 Thermal Head 112 Scanning Block Stepping Motor Drive Circuit Stepping Motor Phase Pattern Gear Section Mode Selection Transmit mode Mode OperationReceive mode Copy mode See 6.5. Sensers and Switches Scanning Printing117 118 Copying Sensors and Switches All of the sensor and switches are shown below119 Motor Position Sensor Recording Paper Sensor SW201120 Read Position Sensor PS2 Document Sensor PS1121 Function Modem SectionOn ITU-T International Telecommunications´ Union Definition of Each Group Control time Concerning Transmission TimeImage transmission time Hold time DIS/DTC DCS 124 125 CFR 126 This unit uses one-dimensional MH format 127 Redundancy Compression Process Coding Mode Modem Circuit Operation Analog Unit General NCU SectionLine Relay RLY1 Bell Detection Circuit Line Amplifier and Side Tone Circuits Handset Circuit Monitor Circuit EXT. TEL Circuit Diagram Operation Panel Analog Switch IC1 ControlKEY Scan Key Matrix LCD Control Sensor Detection This power supply board uses the switching regulator method Power Supply Board SectionInput Circuit Rectifier Circuit KX-FT21RS Control Circuit and Detecting Circuit Surge Absorber CircuitOver Current Limiter O.C.L Over Voltage Circuit For the Schematic Diagrams 141 Printed Circuit Board 142 TP8 TP7 C26 SW201 D104 D103C230 C231 C106 C225 IC101 L203R215 Q203 145 F101 146 Printed Circuit Board Operation Board 147 Schematic Diagram 148 Schematic Diagram Analog Circuit 149 Schematic Diagram Switching Power Supply 150 Schematic Diagram Operation Circuit 151 152 153 Operation Panel Section 154 Upper Cabinet Section 155 Lower CABINET/P.C.B. Section Motor Section 157 Actual Size of Screws and Washer 158 This replacement parts list is for KX-FT21RS only Cabinet and Electrical Parts159 160 Digital Board Parts 161 162 Analog Board Parts 163 164 Operation Board Parts 165 Power Supply Board Parts Fixtures and Tools