HP C7769B Service Manual - Page 38
If the Error Code continues, replace the Paper-Axis Motor
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System Error Codes System Error: 41:13 Problem Description: Error in the Paper-Axis Motor Encoder quadrature. Corrective Action: Try the following: n Switch the Printer Off and wait a few minutes. Switch the Printer On again and check if the Error Code has disappeared. n If the Error Code continues, replace the Paper-Axis Motor ⇒ Page 8-84. System Error: 42:10 Problem Description: Scan-Axis Motor failure. Corrective Action: Replace the Scan-Axis Motor ⇒ Page 8-29. System Error: 43:10 Problem Description: Vacuum Fan failure. Corrective Action: Replace the Vacuum Fan ⇒ Page 8-64. System Error: 43:11 Problem Description: Vacuum Fan not detected. Corrective Action: Reconnect the Vacuum Fan. System Error: 56:10 Problem Description: Drive Roller Encoder Sensor error. Corrective Action: Replace the Drive Roller Encoder Sensor ⇒ Page 8-38. 2-12 HP DesignJets 500 and 800 Series Printers Service Manual