HP Designjet 3D Service Manual page 154

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6. Filament motor is malfunctioning or is disconnected. Verify proper oper-

ation and connections. Test using head maintenance. Also flex the wires

while extruding to test for poor connections.

7. Broken wire in umbilical cable. Replace umbilical cable.

8. Check umbilical hose for proper alignment and connection to the head

cooling fan.

9. Head cooling fan has low air flow, replace the head cooling fan.

10. Z table could be jammed. Check for debris build up around lead screw

and guide rods. Replace Z stage if needed.

1 1. Irregular XY table movement, loose guide rods or loose drive belts. Ver-

ify the guide rods are securely fastened and the drive belt tensions are

correct. Replace XY table if needed.

Troubleshooting