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Unit 5: Troubleshooting
Lt408 Operator Manual
5-2 PN: 9001152A
ERROR SIGNAL TROUBLESHOOTING
This chapter identifies the printer’s various LCD error signals and their relative audible alarms, as well as, their
probable causes and remedies for problem resolution.
ERROR DISPLAYS
ERROR
LED
CONDITION
LCD DISPLAY
DESCRIPTION
01
Machine
Error
POWER:
ONLINE:
LABEL:
RIBBON:
On
Off
Off
Off
1. Ensure all wiring harnesses are properly connected.
2. Replace main circuit board.
02
Flash ROM
Error
POWER:
ONLINE:
LABEL:
RIBBON:
On
Off
Off
Off
1. Ensure correct communication protocols.
2. Check cables, cycle printer power and resend.
3. Replace board.
03
Parity Error
POWER:
ONLINE:
LABEL:
RIBBON:
On
Off
Off
Off
1. Ensure correct communication parameters.
2. Check cables, cycle printer and resend.
3. Replace board.
04
Overrun
Error
POWER:
ONLINE:
LABEL:
RIBBON:
On
Off
Off
Off
1. Check and correct communication cables and settings.
05
Framing
Error
POWER:
ONLINE:
LABEL:
RIBBON:
On
Off
Off
Off
1. Ensure host system and interface settings match.
2. Check and correct communication cables.
(null modem serial cable required)
06
Buffer
Overflow
Error
POWER:
ONLINE:
LABEL:
RIBBON:
On
Off
Off
Off
1. Size of received data exceeds size of receiving buffer.
2. Establish the correct communication protocol.
07
Head Open
Error
POWER:
ONLINE:
LABEL:
RIBBON:
On
Off
Off
Off
1. Properly latch the print head.
2. Replace the head-open switch.
08
Paper End
Error
POWER:
ONLINE:
LABEL:
RIBBON:
On
Off
On
Off
1. Ensure media is properly loaded.
2. Clean sensor transmit/receive surfaces.
3. Ensure correct sensor configuration.
MACHINE ERROR
FLASHROM ERROR
PARITY ERROR
OVERRUN ERROR
FRAMING ERROR
BUFFER OVER
HEAD OPEN
PAPER END