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A470 Users Guide
Pertech® 2006
20
Trouble Shooting Other Issues
Fault Mode
The printer will enter a Fault Mode and will not operate when certain failure conditions are en-
countered. Conrmation of this condition can be accomplished by the host on the DTR (pin 8)
or status with an RS-232 interface, or on the printer fault line (pin 15) for the parallel interface.
A Printer in Fault Mode will not feed paper when the paper advance button on the top
cover is depressed nor will it execute commands other the Reset <ESC><NUL> or Status
<ESC><ENQ>. A parallel printer may indicate a fault when roll paper is low or out but is not in
Fault Mode. Make sure the roll paper is present when conducting this test if DIP switches A1,A2,
& A3 are closed ( parallel Interface selected) and switch A8 is Open (Fault On Low Paper).
The color of the LEFT LED on the front panel of the
printer will change from Green to Red if a fault condition
is encountered. Depressing the paper feed button on
the printer cover will cause the printer to enter diagnos-
tic mode. This will cause the LED to ash a 3 bit code
to dene the specic reason the printer entered Fault
Mode. The error code is followed by a delay before be-
ing repeated. The diagnostic code will toggle the DTR
line and ash the Red LED if the RS-232 interface is se-
lected. It will toggle the Fault- line and ash the green
LED if the parallel interface is selected.
Error code Diagnosed failure
● ● ▬ Short Short Long No motor sensor signal
● ▬ ● Short Long Short Ram test failure
● ▬ ▬ Short Long Long Firmware Error
▬ ● ● Long Short Short No margin sensor signal
▬ ▬ ▬ Long Long Long Head drive motor stalled
STATUS
SLIP
STATUS
SLIP
The printer will remain in FAULT Mode until the power is cycled or the printer is reset with the
<ESC> <NUL> command.
POWER
LOW
PAPER