Pertech A470 User Manual

A470 Users Guide

Pertech® 2006

20

The printer will enter a Fault Mode and will not operate when certain failure conditions are en-

countered.  Confirmation 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 flash a 3 bit code 

to define the specific 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 flash the Red LED if the RS-232 interface is se-

lected. It  will toggle the Fault- line and flash the green 

LED if the parallel interface is selected. 

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

The printer will remain in FAULT Mode until the power is cycled or the printer is reset with the 

<ESC> <NUL> command.