Service manual

Edition 101222
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s1Cad160
It is recommended to discharge capacitors entirely. When the voltage is less then 50V a
1kW 0,5W resistor may be used for the final discharge.
Handling of the control PCB
Carefully put the control PCB in place. Try to avoid touching the wrong pins during
placement of the PCB. The slit in the control PCB and the diode on the power PCB should
help with positioning. Nevertheless remove and place the control PCB carefully.
Insulation resistance measurement
ATTENTION!
All primary and secondary circuits must be short--circuited to protect semiconductor devices.
The insulation resistance between welding circuits (secondary circuits) and primary circuits
should be more then 5MΩ. It is recommended to carry out the insulation resistance test
during periodical survey dependently on the environmental conditions, not less then once a
year.
If needed, the inside of the equipment should be cleaned by means of the compressed air.