Chapter 8: Troubleshooting
8-6
Major faults
The following fault messages are unlikely to be displayed in normal
use. They are listed here for the sake of completeness. Should any of
these faults occur, contact your supplier.
The ALARM lamp also blinks when these faults occur; the follow-
ing lamps light permanently in addition.
10 cpi 15 cpi 17 cpi 20 cpi PROP UTL PRES BOLD Cause
• MPU, internal RAM
• Program ROM
• RAM
• • internal character
generator
• • EEPROM
• Firmware time moni-
toring
• • Firmware NMI signal
• • Firmware BRK com-
mand
• • Serial interface card,
MPU, internal RAM
• • Serial interface card,
ROM
• • Serial interface card,
RAM
• • Head positioning
• • • Print head gap
• • Print head contact
• • • LF/space motor,
driver
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