HP Designjet 2800/3800cp Service Manual - Page 59
the Service Station Interconnect PCA., Printhead Cleaner holder.
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System Error: 020004 Problem Description: Error in finding the Service Station home position. Corrective Action: Try the following: D Make sure that the Service Station flag is installed correctly ' page 8-26. D Make sure that the Service Station nut is installed correctly. The nut is located on the front side of the Service Station, just below the Printhead Cleaner holder. D Make sure that the Service Station Interconnect Cable (the black cable that connects the Service Station to the Electronics Module) is correctly connected to the Electronics Module. D Make sure that the cables for the Service Station components are correctly connected to the Service Station Interconnect PCA. D Make sure that the Service Station stepper motors are NOT shorted. D Replace the Service Station interconnect cable ' Page 8-26. D Replace the Service Station Assembly ' page 8-26. D Replace the Electronics Module ' page 8-6. Only replace one component at a time and check if the error has gone before replacing another component. Using this procedure you will be able to determine exactly which component failed. 2-24 HP DesignJet CP Series Printers System Error Codes