Canon BJC-55 Service Bulletin

Also see for BJC-55 Series: Service manual User manual Start here User manual Specification

5. TROUBLESHOOTING5.1 Overview of Troubleshooting5.1.1 DefinitionTroubleshooting consists of error condition diagnosis, which is required if the cause ofan error is unknown, and error recovery, which is performed if the cause of an error isknown. If the cause of an error is unknown, perform the error condition diagnosis,and if it is known, perform error recovery.5.1.2 Precautions for troubleshooting1. Before starting error condition diagnosis, make sure all the connectors and ribboncables are plugged in.2. If you repair the printer with its case removed and the Universal adapter or batterypack installed, take utmost care to prevent electric shock from the power supplyunit and PCB shorting.3. Troubleshooting procedures are given in flowcharts. The following symbols areused in the flowcharts:4. After replacement or repair, do a test print to make sure the printer works properly.If the printer does not work properly, perform troubleshooting again, skipping thesteps that were done before.Example 15-5BJC-50Part 5: MaintenanceStart/End Operation Judgement Jump StopAction/ReplaceClean the spurs in thepaper delivery unit.Is there anyspur mark?Replace the print unit.NoYesDo a test print.END• Spur or the carriage is defective.Do a Demo pattern print.Hold down thePOWER button until the beeper sounds once andmanual feed a sheet of paper.Press theRESUME button to start Demo pattern print.