Printronix T4204 Maintenance Manual page 39

Symptom
Communications Failures
LCD Message Display
illuminated, the printer
appears to be working, but
nothing is printed
ONLINE status light is flashing
Printer fails to turn on
Table 2. General Symptom List
Control Panel
1. Verify that the labels are the correct type (direct thermal).
Load the correct type of labels.
2. Check that the roll is loaded with the direct thermal side
facing up. Load the roll with direct thermal side facing up.
3. Check that the transfer ribbon is correctly routed and has
the ink side out. Route transfer ribbon with ink side out.
4. Check that the printhead assembly is properly closed by
pressing down on both sides of the assembly. Close both
sides of the printhead.
5. Verify that the ribbon and media are compatible;
incompatibility can cause extremely light printing. Match
the ribbon to the type of media being used.
1. Check for Out-of-Media condition or missing labels in the
middle of a roll. Load correct media.
2. Check that the ribbon and label stock are correctly routed.
Load ribbon and label stock correctly.
3. Make sure the Print Mode settings (Direct or Transfer) are
correctly selected in the PRINTER CONTROL menu. Set
Print Control menu to match the Print Mode.
Power Failures
1. Check that printer AC power cord is correctly attached to
the printer and to the AC power outlet. Attach printer AC
power cord correctly.
2. Test AC wall outlet for correct power range. If no power at
AC outlet, relocate printer to area that has power.
3. Inspect the AC power cord for damage. Test the AC power
cord for continuity. Replace a damaged AC power cord or
one that fails continuity test.
4. Check the printer power supply fuse. Replace blown fuse.
5. If printer does not turn on after the checks above, suspect
a bad power switch. Replace the power switch.
How To Clear LCD Messages
Solution
page 43
39