LSK 1500/1550 User Manual, March 2021
47
© 2017 Global Payments Inc.
CONFIDENTIAL
Receipt Printer Problem
Diagnostics
Failure to print message
1. Check the paper for correct loading.
2. Thermal coated side of paper faces up while feeding (paper type
of CSO).
3. Check the ribbon cable from control board to thermal head for
loose or skewed connection.
4. Check to ensure the thermal head is working properly, and
replace it.
Failure to feed paper
1. Check the paper feed roller and cutter lower support for loose
lever.
2. Check to ensure the feed roller sensor (C) is working properly.
3. Check the sensor cable to the control board.
4. Check to ensure the feed roller motor is working, i.e., gear of the
roller rotating.
5. Check cables from the control board to sub-board for loose
connection.
6. Remove paper fully out of its path by releasing the paper feed
and cutter lower support.
Lock the paper feed and cutter lower support in position
Cut the paper end straight
Feed the paper
7. Check the paper feed sensor (B) for loose connection.
Failure to discharge receipt
1. Check exit path for paper jam.
2. Check to ensure paper exit sensor (D) is working.
3. Check to ensure the exit motor roller is working.
4. Check cables from motor/sensor to sub-board and all the way to
control board for loose connection.
Thermal head overheating
Check the thermal head.
Cutter failure to cut paper
1. Check to ensure the cutter module is working.
2. Check the movement of the cutter blade by manually rotating the
gear mechanism. Check for interference.
Cutter failure to return to home
position
Check the movement of the cutter blade by manually rotating the gear
mechanism. Check for interference.
