HP d640 HP D640 High-Volume Printer - User Manual (Printer and Accessories), C - Page 211

Call Engineer Error Messages and Codes Error Message Fuser temperature low alarm Toner motor alarm Toner screw rotation alarm Developer discharge alarm Developer shutter alarm Toner autoadjustment alarm Toner density high alarm Toner density low alarm Toner density voltage high alarm Code SVC 29 SVC 50 SVC 51 SVC52 SVC54 SVC 56 SVC 57 SVC 58 SVC 59 Description Action The fuser unit temperature is below a normal level. The motor which drops toner into the printer is not working correctly and may need to be replaced. The waste toner auger is not working correctly and may need to be replaced. During the developer replacement procedure the old developer might not be evacuated properly. The problem could be mechanical or electrical. During the developer replacement procedure, the shutter releasing the old developer did not open correctly. The problem could be mechanical or electrical. After the developer was replaced, the automatic toner calibration could not be done correctly. The problem could be mechanical or electrical. The concentration of toner in the developer unit is above the normal range. The concentration of toner in the developer unit is below the normal range. The reference voltage used to measure the toner concentration in the developer unit is above the normal range. Verify that the fuser unit is correctly installed and that all printer doors and covers are closed. Press returns, call from the front panel. If the error message persists, refer to "Removing the Fuser" on page 4-30 and replace the fuser. If this error code returns, call your service representative. Open the upper right cover and check that the connector at the right side of the toner hopper is connected. If it is connected properly, call your service representative. To fix this error call your service representative. To fix this error, call your service representative. To fix this error, call your service representative. Purge developer and try again with a new bottle. If this error code persists, call your service representative. Purge developer and try again with a new bottle. If this error code persists, call your service representative. Purge developer and try again with a new bottle. If this error code persists, call your service representative. Purge developer and try again with a new bottle. If this error code persists, call your service representative. A-10 Printer Messages