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TTP-248M Bar Code Printer
Service Manual
5. TROUBLESHOOTING
5.1 Troubleshooting
The following guide lists the most common problems that may be encountered when
operating this bar code printer. If the printer still does not function after all suggested
solutions have been invoked, please contact the Customer Service Department of
your purchased reseller or distributor for assistance.
Phenomenon
Cause of Errors
Recovery Procedure
No ribbon
1. Running out of ribbon
2. The ribbon is installed
incorrectly.
3. The ribbon sensor is not
been well calibrated.
1. Supply a new ribbon roll.
2. Please refer to the steps in
user’s manual to reinstall
the ribbon.
3. Please calibrate the ribbon
sensor
No paper
1. Running out of label
2. The label is installed
incorrectly.
3. The moveable gap/black
mark sensor is not placed
in the proper location.
1. Supply a new label roll.
2. Please refer to the steps in
user’s manual to reinstall
the label roll.
3. Please move the sensor to
the proper location.
Poor printing quality
1. Dirt is accumulated on the
print head.
2. The density setting is not
set properly
3. Ribbon and media are
incompatible.
4. The pressure of print head
is not set properly
1. Please refer to the steps in
user’s manual to clear the
print head.
2. Adjust the print density and
speed.
3. Change proper ribbon or
proper label roll.
4. Adjust the print head
pressure adjustment knob.
Power indicator does
not illuminate
1. The power cord is not
properly connected.
2. The voltage setting of
power supply in the rear of
printer is set incorrectly.
1. Please check whether the
power cord is well
connected between printer
and outlet.
2. Please set the voltage
setting of power supply at
the rear of printer to the
proper voltage.
Paper jam
1. The label size is not set
properly.
1. a. Reset the label size.
b. Re-calibrate the