Hypertherm Powermax45 Service Manual - Manual (Page 97)

TroubleshooTing and sysTem TesTs
powermax
45 Service Manual 5-21
Test for 200–240 V CSA and 230 V Ce power supplies
1. Turn OFF the power.
2. Position the multimeter leads to measure the boosted bus voltage on the power board by attaching the test leads
to TP (test point) 19 and TP 18. Turn on the power. The multimeter should read 385 VDC. If you get a value other
than 385 VDC, multiply the reading by 0.00601. Compare that value to a reading at pin 21 on J7. They should
have the same value.
3. Turn the power OFF. Attach the E-Z Hooks to TP 19 and TP 17. Turn the power ON after you have connected the
multimeter. This value should be 192.5 VDC or one-half of whatever value you found in step 2.
Note: All values can be ±10%.
4. Turn the power OFF and move the E-Z Hooks to TP 18 and TP 17. Turn the power ON after you have connected
the multimeter. This value should be 192.5 VDC or one-half of whatever value you found in step 2.
5. The values found in steps 3 and 4 should be approximately equal. If they differ by more than 30 V, replace the
power board.
TP 19
W
- + - +
TP 18
R
TP 17
B
192 VDC 192 VDC
TP 19
W
- + - +
TP 18
R
TP 17
B
192 VDC
192 VDC
Step 3
Step 4 Step 2