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Part 13
possible cause for the flashing Error LED is that the printer has been printing
for quite a period of time and the print head temperature become too high.
After few minutes under normal ventilation, the print head should be able to
cool down and the Error LED will stop flashing. Printing will resume after
cooled down. If this is not the case, contact a qualified service person.
Nothing can be printed with ERROR LED ON – Check the Paper
Out LED. If it is ON, most probably either the paper roll is not installed or the
paper roll is at or near the end. Install a new paper roll. If the Paper Out LED is
OFF, please check if the print hood is properly closed. There are 2 internal
check points inside the printer to assure the locking of the hood for a decent
printing. Therefore any dislocation of the hood may cause an error status and
inhibition to printing. Press down the hood at middle of the opening when
closing it till it audibly clicks into place. If both situations are not the cause,
please try pulling the hood lock forward. If the top hood won’t release
automatically, check for paper jam described in next item.
If there is no paper jam and the print head is not overheated, turn off
the printer and wait for half a minute then turn it back on. If the problem still
remains, contact a qualified service person.
Nothing can be printed with ERROR LED OFF – Try to run self-
test according to previous chapter to check if the printer itself works properly.
If the self-test passes, check the following:
1). Check the connection of the interface cable at both the
printer and computer ends. Also make sure that this cable
meets the specification required for both the printer and the
computer.
2). Check the printer data communication settings against the
computer. The printer settings can be found easily on the
self-test print out.
If the problem remains or the self-test fails, contact your dealer or a
qualified service person.
Poor printing quality – Contaminants like paper scraps and dusts on
the thermal print head can lower the print quality drastically. Clean the print
head as described in previous section.
Printer trembles when printing – Since PP-7000II series prints at
180 mm / sec that is extremely high speed, the printer may tremble due to
frequent engagement of the brake and acceleration of the motor. Such situation
in turn can be consequences of very complicated printer operation command or
heavily dense printing (like in inverse printing) in print content or irregular /
insufficient data flow received from the host. When this happens, the print
speed will be dragged down drastically since the motor has to be stopped
frequently. Avoiding such drawbacks can free the printer from trembling and
degraded performance. As a common practice, increasing the communication