HP 1050c Service Manual - Page 56

System Error Codes System Error: 0B000B Problem Description: Pump or Pressure Sensor not working. 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 Check that the Air Pressurization System Sensor Cable is correctly connected and is NOT damaged. n Check all the tubes of the APS and make sure they are NOT pinched or damaged. n Faulty APS Sensor, APS Valve or APS Motor. 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: 0B000C Problem Description: Serial Device ADC test failure. Corrective Action: Replace the Electronics Module ⇒ Page 8-25. System Error: 0B000D Problem Description: 24 V source test failure. Corrective Action: Replace the Electronics Module ⇒ Page 8-25. 2-22 HP DesignJets 1050C and 1055CM Printers Service Manual