HP Designjet 4000 Service Manual - Page 52
If the System Error continues, replace the Media-Axis Motor, Perform the Media Drive Diagnostic - error codes 79 04
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System Error Codes System Error: 79:04 Problem Description: Generic Firmware error. Corrective Action: Try the following: Switch the Power OFF from the back of the Printer and disconnect the Power cord. Reconnect the power cord and power On the Printer. Check that the Printer has the latest Firmware version. If not, update the Firmware to the latest version. System Error: 79.1:04 Problem Description: CDS server lost connection with client. Corrective Action: Try the following: Switch the Power OFF from the back of the Printer and disconnect the Power cord. Reconnect the power cord and power On the Printer. Check that the Printer has the latest Firmware version. If not, update the Firmware to the latest version. System Error: 81:01 Problem Description: Paper servo shutdown. Corrective Action: Try the following: Open the Window and check for any visible obstacles restricting the movement of the Drive Roller. If there is a wrinkled mass of media inside the paper path, lift the Pinchwheels (using the Media Lever) and clear the obstruction. Perform the "Media Drive" Diagnostic (⇒ Page 4-12) to further troubleshoot the error code. If the System Error continues, replace the Media-Axis Motor ⇒ Page 8-62. System Error: 81:03 Problem Description: It was impossible to correctly stop the servo before setting the encoder position. Corrective Action: Try the following: Open the Window and check for any visible obstacles restricting the movement of the Drive Roller. If there is a wrinkled mass of media inside the paper path, lift the Pinchwheels (using the Media Lever) and clear the obstruction. Perform the "Media Drive" Diagnostic (⇒ Page 4-12) to further troubleshoot the error code. If the System Error continues, replace the Media-Axis Motor ⇒ Page 8-62. 2-22 hp designjet 4000 series printer service manual