Parts Replacement; Troubleshooting - Omtech USB3020A User Manual

5.4 Parts Replacement

The engraver should not be modified or disassembled by anyone except trained and skilled professionals, but some
consumable parts may require replacement after prolonged use. Be sure only to use identical or compatible replace-
ment parts with this engraver. Contact your vendor or our technicians if you have any questions about fitment. Using
incompatible components is highly dangerous and waives all the manufacturer's liability for any damage or injury
caused.
ALWAYS completely disconnect the engraver from its power supply before replacing any parts.

5.5 Troubleshooting

The following solutions should quickly solve the most common problems users encounter. Should an issue arise
beyond the scope of these troubleshooting tips, contact our customer service support team or a trained repair profes-
sional for help.
Nothing happens when the engraver is turned on.
Check that the engraver's power cord and any intermediary surge protector are both firmly connected with a stable
compatible power supply. Check the engraver and any surge protector's fuses to see if they have burnt out and require
replacement.
The laser beam does not fire when the test button is pressed.
Check that the water cooling system is working properly and the tank is well supplied with cool (but not icy) distilled
water. Check the laser's path for misalignment and, if necessary, perform the adjustment procedure as discussed in
§4.3.
The laser beam is unusually weak during engraving.
Check that the beam is properly aligned (§5.3) and the focus lens is correctly installed (§5.2.2).
Check your power supply by fully disconnect all power to your machine, disconnecting your laser tube's two power
lines, and connecting them to the provided ceramic testing resistor as shown:
(Do not hold the resistor during the following procedure.) Reconnect your laser's power and turn it on. Press Laser
Tube Button while watching the ammeter. If it does not move, the power supply connection to the laser tube or the
power supply itself is the problem. If the ammeter does fluctuate when Laser Tube Button is pressed, the laser tube's
connection to the power supply or the laser tube itself is the problem. Disconnect all power again and adjust or replace
the parts as needed. Allow the resistor to cool before removing the wires and reattaching them to the laser tube.
Reconnect your engraver's power.
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