TELWIN Tecnica 114 free download

File name inverter_welder_©_.pdf

cod. 988656 TECNICA 114 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...17 REPAIR SHEET... 19 "reparation no problem !" INPUT SECONDARY DIODE EMC FILTER CHOPPER PRE-CHARGE POWER TRANSFORMER RECTIFIER BRIDGE FILTER CURRENT TRANSFORMER INDUCTANCE SECONDARY EMC FILTER OUTPUT BLOCK DIAGRAM 1 2 3 4 5 6 7 8 8 9 10 AUXILIARY POWER SUPPLY TRIGGER DRIVER PRIMARY CURRENT READER AND LIMITER ALARM LED MAXIMUM CURRENT ADJUSTMENT 11 13 14 20 18 TECNICA 114 OPERATION AND WIRING DIAGRAMS -2AUXILIARY ALIMENTATORE FLY-BACK POWER SUPPLY DUTY CYCLE MAKER ADDER ALARM BLOCK OVERVOLTAGE SAFEGUARD UNDERVOLTAGE SAFEGUARD CURRENT POTENTIOMETER t 23 15 16 17 24 11 12 19 POWER SUPPLY LED FAN 25 26 IGBT THERMOSTAT GALVANIC SEPARATION 21 22 TECNICA 114 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: L2. Levels the secondary board diodes' output current making it practically continuous. Block 1 EMC Filter Consisting of: C1, C8, C9, L1. Prevents noise from the machine from being transmitted along the main power line and vice versa. Block 10 Secondary EMC Filter Consisting of: C23, C24. Prevents noise from the power source from being transmitted through the welding cables and vice versa. Block 2 Pre-charge Consisting of: K1, R2. 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 K1 is deenergised, capacitors C2, C3, C4 are then charged by R2. When the capacitors are charged the relay is energised. Block 11 Auxiliary power supply trigger Consisting of: R13, R14, R15, C13 Via the resistors, the power source supplies the necessary voltage to power block 12 (auxiliary power supply). Block 3 Rectifier bridge Consisting of: D1. Converts the mains alternating voltage into continuous pulsed voltage. Block 12 Auxiliary power supply Consisting of: D10, C11, Q11, D11 Rectifies, filters and stabilises the voltage arriving from the tertiary winding of the power transformer (block 7). Block 4 Filter Consisting of: C2, C3, C4. Converts the pulsed voltage from the rectifier bridge into continuous voltage. Block 13 Driver Consisting of: Q6, Q7, D46, D47 Picks up the signal arriving from block 15 (duty cycle maker) adjusts it to suit piloting of block 5 (chopper). Block 5 Chopper Consisting of: Q1. Converts the con