Hypertherm Powermax45 Service Manual - Manual (Page 82)

TroubleshooTing and sysTem TesTs
5-6
powermax
45 Service Manual
dANgeR
ELECTRIC SHOCK CAN KILL
• Turn off the power and remove the input power plug from its receptacle before
removing the cover from the power supply. If the power supply is connected directly to
a line disconnect box, switch the line disconnect to off (o). In the U.S., use a “lock-
out / tag-out” procedure until the service or maintenance work is complete. In other
countries, follow appropriate national or local safety procedures.
• Do not touch live electrical parts! If power is required for servicing, use extreme caution
when working near live electrical circuits. dangerous voltages exist inside the power
supply that can cause serious injury or death.
• Do not attempt to repair the power board or control board. Do not cut away or remove
any protective conformal coating from either board. To do so will risk a short circuit
between the AC input circuit and the output circuit and may result in serious injury or
death.
HoT PARTS CAN CAUSe SeVeRe bURNS
• Allow the power supply to cool before servicing.
MoVINg blAdeS CAN CAUSe INJURy
• Keep hands away from moving parts.
STATIC eleCTRICITy CAN dAMAge CIRCUIT boARdS
• Put on a grounded wrist strap before handling PC boards.
external inspection
1. Inspect the exterior of the power supply for damage to the cover and external components, such as the power
cord and plug.
2. Inspect the torch and the torch lead for damage.
Internal inspection
1. Turn OFF the power, disconnect the power cord, and disconnect the gas supply.
2. Use a #2 Phillips screwdriver to remove the 2 screws from the handle on the top of the power supply. Gently pull
on the end panel nearest the screw you are removing to keep pressure on the screw. When the screw is almost
out, tilt the screwdriver slightly to help pull the screw out of the recessed hole.
3. Tip the end panels back slightly so that you can get the edges of the handle out from underneath them. Set the
handle and screws aside. Continue to tilt the end panels outward to release the fan side of the cover from its track.
Then lift the cover off the power supply.