Prepare to Troubleshoot Internal Components
Powermax65/85/105 SYNC Troubleshooting Guide 810430 29
6. Measure the resistance from the input leads to ground to make sure that they read as open.
Look for the symbol on the heatsink . For all models, the resistance from input to ground
must read as greater than 20 megaohms (M).
With the power disconnected and the power switch set to OFF (O), all
circuits must read as open. The electrical values shown are ±25%.
Figure 1 – Power switch in the plasma power supply
CSA and 230 V – 400 V CE models
CCC and 400 V CE models
650 kΩ
650 kΩ 500 kΩ
>20 MΩ
400 kΩ
400 kΩ
400 kΩ650 kΩ
1 1
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