HP 1050c Service Manual - Page 53

System Error Codes System Error: 0B0003 Problem Description: ADC0 Internal channels check Failure. Corrective Action: Replace the Electronics Module ⇒ Page 8-25. System Error: 0B0004 Problem Description: Unable to detect Pump. Corrective Action: Try the following: n Check that the cable from the Ink Supply Station (ISS) PCA to the Ink Supply Station is correctly connected. n Faulty APS Pump. Replace the complete APS ⇒ Page 8-20. n If the error code continues, replace the Electronics Module ⇒ Page 8-25. WARNING 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. System Error: 0B0005 Problem Description: Unable to detect Valve. Corrective Action: Try the following: n Check that the cable from the Ink Supply Station (ISS) PCA to the Ink Supply Station is correctly connected. n Faulty APS Valve. Replace the complete APS ⇒ Page 8-20. n If the error code continues, replace the Electronics Module ⇒ Page 8-25. WARNING 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. HP DesignJets 1050C and 1055CM Printers Service Manual 2-19