Main Components - Kemppi Fitweld 300 Service Manual

Secondary rectifier Z002

Main components

- Middle point connected full wave rectifier
- Damping circuit reduces voltage stress of diodes
- Overvoltage varistors protect diodes from ignition sparks
Measurement points
Secondary diodes:
1. Measure diode branches one at the time
from transformer (red test probe) to
common point (black test probe)
Values: 0,3 – 0,5 VDC
2. Measure diode branches one at the time
from common point (red test probe) to
transformer (black test probe)
Value: No value
Damping circuit resistors:
Resistor value must be 5
Diode branch A
Resistor A
Resistor B
Diode branch B
Common point
8