Diagraph TJ500, Operation Manual

Page: 27 / 47

Thermal Jet
Section 5: Troubleshooting
5780-320 Operations Manual Rev C Page 23
Section 5: Troubleshooting
NO PRINT
System Symptom Possible Cause Actions
No print head power /
green LED on rear of
print head • Power Supply
• AC Source
• Check power supply light indicator.
• Check for AC power source between power sup-
ply input limits.
PURGE button on rear
of head does not
appear to work • Ink cartridge is dam-
aged or empty
• Print head Board
• Replace with new cartridge and repeat PURGE.
• Replace print head printed circuit board or print
head.
Print head purges but
won’t print desired mes-
sage • Loose or missing
cables
• Controller or PC soft-
ware not configured for
Serial Print Head
• Encoder Malfunction
• Product not triggering
photocell.
• Tighten or install all cables.
• Ensure print heads are configured as serial. See
“Section 2: Quick Start”, “Step 6: Cabling, Power,
and Serial Port Setup” on page 7.
• Ensure encoder is installed and plugged into the
last print head in the daisy chain.
• If the encoder is installed, navigate to the control-
ler Status screen from the Home screen. While
the encoder is turning, check the line speed for
greater than 0 ft/min or 0 m/min.
• Ensure the product is within 1/4" of the front face
of the print head.
• If an external photocell is installed, then validate
the setting from the Control Panels, System
Setup, Task Options Tab.
POOR PRINT QUALITY
System Symptom Possible Cause Actions
Print is foggy or light • Print head is mounted
greater than an 1/8"
away from the sub-
strate
• There are large air cur-
rents near the print
head
• Adjust the print head according to “Section 2:
Quick Start”, See “Step 4: Adjust TJ500 Print
Head to Substrate” on page 5.
• Locate print head in an area where there are min-
imal currents or provide wind barriers.
Print image is missing
channels or has multiple
fractures • Pen cartridge face is
dirty
• Pen cartridge face is
damaged at the orifice
array
• Pen cartridge is not
properly seated in the
print head
• Clean the pen face per “Section 4: Maintenance
& Shutdowns” on page 21.
• Replace damaged pen cartridge with new.
• Remover cartridge and reinsert according to
“Section 2: Quick Start”, “Step 5: Insert Cartridge
Pen into Print Head” on page 6.