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Unit 5: Troubleshooting
LM408-412e Operator Manual
5-2 PN: 9001155A
ERROR SIGNAL TROUBLESHOOTING
ERROR DISPLAYS
ERROR LED
LCD DISPLAY
DESCRIPTION
01
Machine
Red
1. Ensure all wiring harnesses are properly connected.
2. Replace main circuit board.
02
Flash ROM
Red
1. Ensure correct communication protocols.
2. Check cables, cycle printer power and resend.
3. Replace board.
03
Parity
Red
1. Ensure correct communication parameters.
2. Check cables, cycle printer and resend.
3. Replace board.
04
Overrun
Red 1. Check and correct communication cables and settings.
05
Framing
Red
1. Ensure host system and interface settings match.
2. Check and correct communication cables.
(null modem serial cable required)
06
Buffer Overflow
Red
1. Size of received data exceeds size of receiving buffer.
2. Establish the correct communication protocol.
07
Head Open
Red
1. Properly latch the print head.
2. Replace the head-open switch.
08
Paper End
Red
1. Ensure media is properly loaded.
2. Clean sensor transmit/receive surfaces.
3. Ensure correct sensor configuration.
09
Ribbon End
Red
1. Ensure ribbon stock is properly loaded.
2. Ensure ribbon has not been damaged.
3. Ensure proper printer configuration.
10
Sensor Error
Red
1. Ensure media is properly loaded.
2. Clean sensor transmit/receive surfaces.
3. Ensure correct sensor configuration.
11
Head Related
Red
1. Clean the print head’s contact surface.
2. Replace the print head.
12
Memory Reading
Red
1. Delete unnecessary data to free up memory space.
2. Ensure the data communication settings are correct.
13
Interface
Red
1. Data sequence number doesn’t match previous data.
2. Check send data and communications setting.
14
Download Data
Red
1. Reinstall print head.
2. Ensure proper print head is installed.
15
Download Write
Red
1. Ensure cover is fully closed.
2. Replace cover-open sensor.
16
Head Mis-Match
Red
1. Ensure cover is fully closed.
2. Replace cover-open sensor.
MACHINE ERROR
EEPROM ERROR
PARITY ERROR
OVERRUN ERROR
FRAMING ERROR
BUFFER OVER
HEAD OPEN
PAPER END
RIBBON END
SENSOR ERROR
HEAD ERROR
DOWNLOAD ERROR
XXXXXXXX ERROR
DOWNLOAD ERROR
I/F NOT SUPPORTED
DOWNLOAD ERROR
DATA ERROR
DOWNLOAD ERROR
WRITE ERROR
HEAD MISMATCH