Unitec POS4000/V2 - Manual (Page 106)

POS4000
Document Number: POS4003 98
Document Title: POS4000/V2 Operations Manual
it begins to fray.
To test the printer, disconnect the printer cable from the console and perform the
printer self test mode by turning the printer on while pressing the LF switch on
the top of the printer. Release the LF switch after the self-test operation begins.
The printer will print a test pattern and stop. If the test fails, have the printer
repaired or replaced.
If the printer prints normally except for a missing horizontal section of each line it
is likely a print head failure. Replace the print head or entire printer mechanism.
If a new printer mechanism fails the self-test print check, it is likely a printer
controller failure. Replace the printer controller board or repair or replace the
printer.
If the printer passes the self-test print check, try printing a customer ticket making
sure the "POWER" and "SEL" lights on the printer lid are both light. If the printer
passes the self-test and fails to print during normal operations it is likely a
POS4000 console main PC board failure. Replace the POS4000 console main
PC board.
9.4 System Locked Up
1) Make sure the console power light is ON. If not, plug console in and turn
power switch on.
If you have problems, which you cannot resolve, a power reset may restore
normal operation. Turn the power off for a minute and then back on. This will
reset the console but will not affect the codes or counts in memory since the
memory has a battery back-up.