Pentax PocketJet User Manual page 52

If the battery is connected properly, you may have
attempted to charge the battery when it has become
overheated during a discharge or charge cycle. Allow the
battery to cool before continuing to discharge or charge it.
If the indicator lights still show that a battery error has
occurred, the battery may be defective or the printer may
need service. Call Pentax or your local Authorized Service
Center and ask for Technical Support.
The POWER, DATA and
BATTERY indicator lights
Power Data Battery
are blinking.
A system error has occurred. Turn the printer off and on
again to clear the system error. If you cannot clear it, call
Technical Support.
The POWER and DATA
indicator lights are blinking.
Power Data Battery
A data I/O error has occurred. If you are using the parallel
interface cable, the parallel connection may be defective,
and the data is overflowing the print buffer. Replace the
defective part—most likely the interface cable.
If you are using an optional RS-232C serial interface cable,
make sure the serial port speed and handshaking method
on the printer and the computer match. DIP switches 1 and
2 control the speed of the serial port. DIP switch 7 controls
the handshaking method. See page 20. If the serial port
speed and handshaking method are correct, the serial
connection may be defective. Replace the defective
part—most likely the serial interface cable.
The POWER indicator light is
blinking and the BATTERY
Power Data Battery
indicator light is off.
The thermal print head has overheated. Turn the printer off
or wait until the POWER indicator light stops blinking before
you continue printing.
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Pentax PocketJet Printer User's Guide