Kemppi WELDFORCE KPS 3500, Service Manual, Page: 2 / 18

Contents
Technical data …….……………………………....………3
Switches and connectors …....…………………………….3
Operation principle ………………………………………4
Simplified main circuit diagram …….………...………...5
Main circuit components ………………………………...5-8
Control cable connectors ………………………………...9
Troubleshooting diagram ….........……………………….10
Control card A001 layout ….…………………...………..11
Control card A001 jumper ….....................……………...11-12
Control card A001 leds ….………….……………………12
IGBT gate pulse …...……………………………………...13
Voltage over the lower IGBT ………….…………….......14
Voltage after the secondary diode cards ….………….....15
Cooling unit control …….............………………………...16
Structure (Kemppi
WELDFORCE
TM
4500)……………...... 17
Notes ……………………………………………................18
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