Trouble Shooting Printer Problems
LED Error Fault Mode Diagnostics
The printer will enter a Fault Mode and will not operate when certain failure conditions are encountered. Confirmation of this condition can be accomplished by the host on the DTR (pin 8) or status with an
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 than immediate commands that are executed even when the printer is in a fault condi- tion. Immediate commands are
ACL Control Language Immediate Commands
(See 5300 Programing Manuals for details on these and other Compatibility Mode available commands)
Immediate status transmission | DLE EOT | 10 | 04 | 16 | 4 | n |
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Immediate recovery from fault | DLE ENQ | 10 | 05 | 16 | 5 | n |
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Immediate peripheral pulse | DLE | DC4 | 10 | 14 | 16 | 20 | s m n |
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Immediate printer reset | DLE | @ | 10 | 40 | 16 | 64 |
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The color of the Power LED on the front panel of the printer will change from Green to Red if a fault condition is en- countered. Depressing the paper feed button on the printer cover will cause the printer to enter diagnostic 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 being repeated. The diagnostic code will toggle the DTR line and flash the Red LED if the
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| Error Code |
| Diagnosed failure | |
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Dot | Dot | Dash | Mechanical Error (most likely compensator, wiper problem)* | |
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Dot | Dash | Dot | Ram Error*** |
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Dot | Dash | Dash | Program Error / Firmware Error*** | |
Dash | Dot | Dot | Home Sensor Error ** | |
* Clamp functionality, wiper engage and disengage
** Failed sensor, control board problem, mechanical problem or dirty sensor. The later has
proved to be the most common and can be resolved by cleaning paper dust and other debris from the sensors and code wheel.
***Failures diagnosed with error codes indicating a problem with the firmware or control board.
The printer will remain in FAULT Mode until the power is cycled or the printer is reset with a imediate reset command.
Pertech Resources Inc. | November 2005 | 220321A | 27 |