Sometimes there is a transmit problem | Panasonic KX-FT21RS guide

KX-FT21RS

2.Sometimes there is a transmit problem

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Panasonic KX-FT21RS manual Sometimes there is a transmit problem

Contents

KX-FT21RS Contents Battery Caution Safety PrecautionsFor Service Technicians Insulation Resistance Test AC Caution Moving Sections of the Unit Personal Safety PrecautionsLive Electrical Sections Facsimile FeaturesGeneral Integrated telephone system Specifications Optional Accessories Ccitt No Test Chart Overview Location of ControlsControl Panel Connections Installing the Recording Paper InstallationDocument Stacker Example Bill Setting Your Logo# , then Press START/COPY/SET To select characters with the dial keypad Documents you can send Maintenance Check ITEMS/COMPONENT Locations Maintenance Items and Component LocationsOutline Maintenance List Maintenance Cycle Clean the document feeder rollers, sub roller Maintenance Cleaning the Document Feeder UnitDisconnect the power cord and the telephone Line cord Cleaning the Pick UP Roller Cleaning the Thermal HeadRefer to 4 Disassembly Instruction Troubleshooting Troubleshooting SummaryPrecautions User Recoverable Errors Document Jam Troubleshooting Details Starting Troubleshooting Simple Check List Troubleshooting Items Table ADF Auto Document Feed Section No document feed Paper JAM Multiple feed Skew Image is distorted When printing Black or white vertical lines appear Skewed receiving image KX-FT21RS KX-FT21RS Communication Section Facsimile section Transmit problem Defective facsimile section Sometimes there is a transmit problem Reception problem Check Document Paper JAM Unit can copy, but cannot transmit/receive Echo/Echo Canceler Erroneous detection due to an echo or echo cancelerCause and Countermeasure Cause B Causes and Countermeasures Cause aCountermeasure a Countermeasure B Transmission Operation Reception 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 Remote programming Hint KX-FT21RS Program Mode Table YES/NO 996 Journal Please refer to the 2.3.4.3.1. Digital Block Diagram Digital Board Section 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 Power Supply Board Section Key components for troubleshooting Troubleshooting Flow Chart KX-FT21RS Broken parts repair details D101, D102, D103, D104 Operation Board Section No key operation No LCD indication Check the document sensor PS1 Sensor SectionCheck the read position PS2 Read Section Refer to 6.4.4. Scanning Block KX-FT21RS Thermal Head Section Refer to 6.4.3. Thermal Head Operation Programming and ListsOperation Flow Above values are the default values Service Function Table 3ALL Service Mode Settings Example of a printed out list See 2.6.1. Printout Example Other Test Functions Button Code Table Dtmf Signal Tone Transmit SelectionPrint Test Pattern Mslt means Minimum Scan Line Time. Used only at the factory DescriptionsCompression Code MH/MR EQM Printout Example Adjustments Adjusting the Feed Pressure Disassembly Instructions KX-FT21RS KX-FT21RS KX-FT21RS KX-FT21RS KX-FT21RS KX-FT21RS KX-FT21RS KX-FT21RS KX-FT21RS KX-FT21RS Flat Package IC Removal Procedure Preparation KX-FT21RS Connection Diagram General Block Diagram Codec IC5 D/A converter +24V +5V AC220V256k Control Section Block Diagram100 Execute modulation and demodulation for the FAX Asic IC1Decodes the address Transmits the recorded data to the thermal head 102 103 104 Vddc ROM IC2 Reset CircuitRAM IC3 Function Sram and RTC Back UP CircuitCircuit Operation Supervision Circuit for the Thermal Head Temperature LED Arraycis Copy Fine, Super-Fine, Half Tone Facsimile SectionImage Data Flow During Facsimile Operation Transmission Front/End Block DiagramAnalog Head 110 Thermal Head 112 Scanning Block Stepping Motor Phase Pattern Stepping Motor Drive Circuit Mode Selection Gear Section Receive mode Mode OperationTransmit mode Copy mode Scanning Printing See 6.5. Sensers and Switches117 Copying 118 All of the sensor and switches are shown below Sensors and Switches119 Recording Paper Sensor SW201 Motor Position Sensor120 Document Sensor PS1 Read Position Sensor PS2121 On ITU-T International Telecommunications´ Union Modem SectionFunction Definition of Each Group Image transmission time Concerning Transmission TimeControl time Hold time 124 DIS/DTC DCS 125 126 CFR Redundancy Compression Process Coding Mode This unit uses one-dimensional MH format 127 Modem Circuit Operation Analog Unit Line Relay RLY1 NCU SectionGeneral Bell Detection Circuit Line Amplifier and Side Tone Circuits Monitor Circuit Handset Circuit EXT. TEL Diagram Circuit KEY Scan Analog Switch IC1 ControlOperation Panel Key Matrix Sensor Detection LCD Control Input Circuit Power Supply Board SectionThis power supply board uses the switching regulator method Rectifier Circuit KX-FT21RS Over Current Limiter O.C.L Surge Absorber CircuitControl Circuit and Detecting Circuit Over Voltage Circuit For the Schematic Diagrams Printed Circuit Board 141 TP8 TP7 C26 142 C230 C231 C106 D104 D103SW201 C225 R215 L203IC101 Q203 F101 145 Printed Circuit Board Operation Board 146 Schematic Diagram 147 Schematic Diagram Analog Circuit 148 Schematic Diagram Switching Power Supply 149 Schematic Diagram Operation Circuit 150 151 152 Operation Panel Section 153 Upper Cabinet Section 154 Lower CABINET/P.C.B. Section 155 Motor Section Actual Size of Screws and Washer 157 158 Cabinet and Electrical Parts This replacement parts list is for KX-FT21RS only159 Digital Board Parts 160 161 Analog Board Parts 162 163 Operation Board Parts 164 Power Supply Board Parts 165 Fixtures and Tools