TELWIN TECNICA 144-164 free download

File name Tecnica 144-164 inverter.pdf

cod. 988637 TECNICA 144-164 TECNICA 140.1 - 142 inver ter TROUBLESHOOTING AND REPAIR MANUAL CONTENTS PAGE 2 2 3 5 6 OPERATION AND WIRING DIAGRAMS... Block diagram Analysis of the block diagram Illustrations Wiring diagrams REPAIR GUIDE... 9 Equipment required 9 General repair instructions 10 Troubleshooting and remedies 10 Testing the machine 13 Illustrations 15 SPARE PARTS LIST...18 REPAIR SHEET... 20 "reparation no problem !" INPUT CHOPPER SECONDARY DIODES PRIMARY EMC FILTER CURRENT TRANSFORMER POWER TRANSFORMER PRE-CHARGE RECTIFIER BRIDGE FILTER INDUCTANCE EMC FILTER I I° OUTPUT BLOCK DIAGRAM 1 2 3 4 5 6 7 8 8 9 10 OVERVOLTAGE PROTECTION ALARM LED OVERVOLATGE SEFEGUARD VOLTAGE RECTIFIER DRIVER PRIMARY CURRENT READER AND LIMITER MAXIMUM CURRENT ADJUST. AUXILIARY POWER SUPPLY TRIGGER t t 26 23 27 11 14 17 21 12 FAN DUTY CYCLE MAKER POWER SUPPLY LED ALIMENTATORE AUXILIARY POWER FLY-BACK SUPPLY ALARM CLOCK SEPARATOR TRANSFORMER ADDER CURRENT POTENTIOMETER TECNICA 144 - 164 OPERATION AND WIRING DIAGRAMS -215 18 19 20 22 TRANSFORMER PILOT 29 28 11 13 16 POWER TRANSFORMER THERMOSTAT THERMOSTATS GALVANIC SEPARATOR 24 25 TECNICA 144 - 164 ANALYSIS OF THE BLOCK DIAGRAM NOTE: Unless indicated otherwise, it should be assumed that the components are assembled on the power board. Block 9 Inductance Consisting of: L1. Levels the secondary board diodes' output current making it practically continuous. Block 1 EMC Filter Consisting of: C1, T4, C8, C15. Prevents noise from the machine from being transmitted along the main power line and vice versa. Block 10 Secondary EMC Filter Consisting of: C28, C33. Prevents noise from the power source from being transmitted through the welding cables and vice versa. Block 2 Pre-charge Consisting of: PD1, R4. Prevents the formation of high transitory currents that could damage the main power switch, the rectifier bridge and the electrolytic capacitors. When the power source is switched on the relay PD1 is deenergised, capacitors C21, C22, C27 are then charged by R4. When the capacitors are charged the relay is energised. Block 11 Voltage rectifier Consisting of: D11,C18. Rectifies and filters the voltage from the tertiary winding of the power transformer (block 7). Block 12 Auxiliary power supply trigger Consisting of: R18, R35, C20. Via the resistors, the power source supplies the necessary voltage to power block 13 (power supply). Block 3 Rectifier bridge Consisting of: PD1. Converts the mains alternating voltage into continuous pulsed voltage. Block 4 Filter Consisting of: C21, C22, C27. Converts the pulsed voltage from the rectifier bridge into continuous voltage. Block 13 Auxiliary power supply Consisting of: U3, C17. Stabilises the voltage at 12Vdc for the power arriving from block 12 (auxiliary power