Hypertherm HSD130 HySpeed Plasma - Manual (Page 164)

MAINTENANCE
5-18 HySpeed HSD130 RHF Instruction Manual
Initial checks
Before troubleshooting, do a visual check that proper voltages are present at the power source, transformers and power
distribution board.
1. Disconnect line power by turning OFF the main disconnect switch.
2. Remove the power supply’s top panel and 2 side panels.
3. Inspect interior of power supply for discoloration on PC boards, or other apparent damage. If a component or module
is obviously defective, remove and replace it before doing any testing. Refer to the Parts List section to identify parts
and part numbers.
4. If no damage is apparent, connect power to the power supply, and turn the main disconnect switch ON.
5. Measure the voltage between the W, V and U terminals of TB1 located on the right side of the power supply. See
Power measurement later in this section. Also refer to the wiring diagram in Section 7, if required. The voltage
between any 2 of the 3 terminals should be equal to the supply voltage. If there is a problem at this point, disconnect
main power and check connections, power cable, and fuses at line disconnect switch. Repair or replace any
defective component.
DANGER
SHOCK HAZARD: Always use extreme caution when servicing a power supply when it is plugged in and
the covers are removed. Dangerous voltages exist within the power supply which could cause injury or
death.