FLORA LJ3208P - Troubleshooting Guide; Common Printing Problems and Solutions

Flora Digital Printing System
Model LJ320P
Copyright 2011@ Shenzhen Runtianzhi Image Technology Co.,Ltd. By Victor Xu
~67~
Appendix A Troubleshooting Guide
Problems Probable Causes Solution
 One particular color is not
printing
o No ink flowing to the tube line
of the Print head Carriage
o Empty ink supply in the Ink
barrel
o Clogged Ink line tubing and ink
filter
o Defective Ink Pump
o Defective Print head Control
Board
o Defective Motion Control Board
• Fill-up empty ink barrel
• Replace clogged ink line tubing and ink filter
• Replace defective Ink Pump
• Replace defective Print head Control Board
• Replace defective Motion Control Board
 Some Print head Nozzles
are not firing
 Print head firing is not
straight
o Clogged Print head
o Print head problems
o Defective Print head Cable
o Defective Print head Control
Board
• Perform solvent flushing and Ink Priming
(make a longer flushing if needed)
• Replace defective Print head
• Replace defective Print head Cable
• Replace defective Print head Control Board
• Adjust the Print head Voltage
 Ink Starvation
o Insufficient Negative Pressure
value
o Print head nozzles are not
working well
o Insufficient ink flowing from
the Disc Filter to the Print head
because of clogged disk filter
 Increase the Negative Pressure value from
-1.8KPa to -2.1KPa
 Perform Test Print to check if all the Print head
nozzles are working well, flush and ink prime
as needed
 Replace Filter
 Cannot achieve correct
negative pressure
 Negative pressure keeps
on changing from time to
time
o Presence of ink in the Ink
Protect Tank
o Defective Negative Pressure
Regulator
o Defective Pressure Gauge
o Defective Air Pump
o Possible leak in the vacuum line
system (negative pressure line)
 Remove or purge any presence of ink in the Ink
Protect Tank
 Replace defective Negative Pressure Regulator
 Replace Pressure Gauge
 Replace Air Pump
 Fix any air leak from the vacuum line system.
 Replace Air Fittings if necessary
 Air Pump is not working
 Ink Pumps are not
working
o Presence of ink in the Ink
Protect Tank
o Ink Tank Sensor might not be
working that is why ink is
overflowing to the Ink Protect
Tank.
 Fix/replace the Ink Tank Sensor
 Remove the ink from the Ink Protect Tank
using the Syringe from the Ink Outlet Tube
vent