HP d640 HP D640 High-Volume Printer - User Manual (Printer and Accessories), C - Page 112

Handling Error Messages and Troubleshooting 3. Unscrew bracket A, which connects the HCO to the printer. 4. Push the HCO to the left to disengage the connecting pin from the positioning hole. 5. Pull the HCO away from the printer. It is still connected by a cable, but you should only need to move it far enough to see if there is paper jammed in the interval between the machines. If you find paper there, remove it. 6. Push the HCO and the printer together and reseat the connecting pin in the positioning hole. 7. Replace bracket A. If no other paper jam indications appear on the Control Panel, you are ready to resume printing. If the Control Panel still shows a jam, search the area again, or the area indicated on the Control Panel. Handling Error Messages and Troubleshooting An error message can be caused by mechanical problems, such as jams, or by incorrect settings, such as specifying the wrong paper size from the wrong paper tray. These are typical printer problems than can be easily cleared by the user. Printer errors that are caused by mechanical or electrical problems are also reported by specific error codes. These problems require a service call to your service representative. An error message is always accompanied by an action message, as shown in Figure 3-70. Front door open Close front door PCL 12.145 Cen OOnfflliinnee Error message 600dpi Action message LTR LTR LTR Clear Custom Menu Test PapSize Figure 3-70 Error reporting Printer Tasks Printer Tasks 3-49