No Power - Datamax W-Class Maintenance Manual

3.2.2

No Power


Notes: (1) Ensure the AC outlet is functioning properly; also, that the power cord is securely connected to the
outlet and printer. (2) Some circuits are protected by resettable fuses; if tripped, cycling printer power
will reset those fuses.
1 Turn the printer off for 30 seconds.
Turn the printer back on.
Does the printer power up?
2 Turn the Printer off and unplug the
power cord from the AC outlet.
Remove the Cover and the Power
Supply Shield.
Check the Power Supply fuses; is
there a blown fuse?
3 Turn off and unplug the printer.
Disconnect the following cables
from the Power Supply Board:
Printhead Power Cable (J2)
Stepper Motor Cable (J6)
Plug in and turn on the printer. Does
the printer power up?
4 Look at the Power Supply Board.
Are the two green LEDs on?
Defective Power Supply
Troubleshooting
Return to Section 3.2.1 and complete
the Problem Isolation Checklist.
Replace the fuse(s). If the fuse(s)
continue(s) to fail, the Power Supply
Board is probably defective.
Turn 'Off' the power switch.
Reconnect the cables one at a time.
Power the printer 'On' following each
connection. When the printer fails to
power-up, turn 'Off' the power switch
then inspect and replace the
components associated with that
voltage branch.
Possible defective Main Board and/or
Front Panel.
3-10