Hypertherm Powermax30 Service Manual - Manual (Page 45)

MAINTENANCE
3-6
powermax30
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.
Internal inspection
1. Set the ON/OFF switch (S1) to O (OFF), unplug the power cord and disconnect the gas supply.
2. Use a #2 Phillips-head screwdriver to remove the 2 screws from the power supply’s handle. Tip the endcaps
back slightly so that you can get the edges of the handle out from underneath the endcaps. Remove the handle
and then lift the cover off the power supply.
3. There is a Nomex ® insulating barrier between the cover and the power board. Lift the barrier out of the power
supply and set it aside. Be certain to replace the barrier when you are finished working on the power supply.
4. Inspect the inside of the power supply, especially on the side with the power board. Look for broken or loose
wiring connections, burn and char marks, damaged components, and so on. Repair or replace as necessary.