Do System Tests to Identify Defective Components
11 0 810430 Troubleshooting Guide Powermax65/85/105 SYNC
Examine the plasma power supply
1. Set the power switch on the plasma power supply to OFF (O), and disconnect the power cord.
2. Remove the plasma power supply cover and the component barrier.
3. Make sure that a cartridge is installed on the torch.
4. Make sure that the torch is set to the green “ready to fire” ( ) position.
5. Connect the torch to the plasma power supply.
6. Do a check for continuity between pin 1 and pin 2 at J20 (Powermax65/85 SYNC) or J17
(Powermax105 SYNC) on the power PCB. Refer to Figure 27 on page 111. Is there continuity?
If yes, continue with the next step.
If no, do a check for continuity at the quick-disconnect receptacle. Refer to Do a check for
continuity on page 25.
7. Make sure that the power is OFF (O), and put a jumper wire between pin 1 and pin 2 on J20 or
J17.
8. Connect the power cord to the power source, and set the power switch on the plasma power
supply to ON (I).
9. Does the 0-50-0 fault code show on the main screen?
If yes, replace the power PCB.
If no, replace the DSP PCB.
WARNING
ELECTRIC SHOCK CAN KILL
The plasma power supply contains dangerous electric voltages that can seriously injure or
kill you.
Use extreme caution if you do service or maintenance work on a plasma power supply
when it is connected to an electric power source and the outer cover or panels are
removed.
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