Oki Microline 520 Service Handbook
Also see for Microline 520: User guideProduct updateGuía del usuarioManual do utilizadorUser guide
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Contents | 
4.6.03 ALARM/LED Display Troubleshooting TablesCAUTION:Always check that all connectors on the printer are making good contact.ReferenceNumberFailure Description Cause Recommended Action1 Space Motor Alarm Space motor IPT does not occurin specified time.Refer to RAP 02.2 Printhead Detection Alarm Printhead does not home. Refer to RAP 03.3 Printhead A/D Alarm Thermistor is open or +5 vdcshorted.Check the printhead connection.Then, replace the main controlboard, the carriage cable, andthe printhead.4 Printhead Gap Alarm Self adjustment was notsuccessful.Check the printhead connection.Then, replace the main controlboard, the carriage cable, andthe printhead.5 Printhead Data Transfer Alarm Printhead parity errorwas not recovered or print headwas not seated properly.Replace the main control board,the carriage cable, and theprinthead.6 Printhead Type Alarm 24 pin printhead is connected ina 9 pin printer.Replace the printhead with a 9pin printhead.7 Printhead Connection Alarm (1) Overdrive signal is active but nocurrent is detected.Check the printhead connection.Then, replace the main controlboard, the carriage cable, andthe printhead.8 Printhead Connection Alarm (2) Self adjust was not successful.Head gap is too small or toonarrow.Check the printhead connection.Then, replace the main controlboard, the carriage cable, andthe printhead.9 Line Feed / Space Motor DriverAlarmHigh driver temperature. TheTSD signal has not changed.Replace the following: maincontrol board, line feed motor,and space motor.10 MPU Internal RAM Alarm Read/write error Replace the main control board.11 Program ROM Alarm Check sum error Replace the main control board,and/or ROM.12 RAM on Main Control Board Read/write error Replace the main control board.13 CG ROM Alarm Check sum error Replace the main control board.Failure Analysis 4 - 20 Microline 520/521 Service HandbookP/N 59257803 |
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