HP Color LaserJet 8500 Service Manual - Page 95

Service Mode Menu The Service Mode Menu can be entered only by pressing the left side of the ITEM and the VALUE keys at the same time. For more information about using the Service Mode Menu, see page 420. l NVRAM SETTING (nonvolatile random-access memory setting) menu is provided to replace values that might be lost when a formatter board or control board is replaced in the field. l FORMATTER DIAGNOSTICS menu is provided for manufacturing and field service personnel to perform specific diagnostic tests on the formatter board and its related components. • Service personnel can pinpoint problem areas on the formatter board for replacement or for tracking defects. • The operator can choose which tests are enabled and disabled during execution, whether the tests run once or continuously, and whether the test sequence stops upon failure or continues despite failure. • A fault log is implemented within formatter diagnostics to record errors for review. • Because many of the formatter diagnostic tests are destructive memory tests, a special key sequence is used to enter the mode. A message warns service personnel that the printer is about to perform destructive memory tests. Table 26. Service Mode Menu Service Mode Menu Item NVRAM SETTING SERIAL NUMBER Value FORMATTER NUMBER * Default setting. TOTAL PAGE COUNT COLOR PAGE COUNT Description/action This number is the serial number of the printer. Press - VALUE + to change the value of the current character. Press SELECT to save the value and move to the next character. This number is the serial number of the formatter board. Enter the number in the same manner as the serial number of the printer. Total number of pages processed. Number of color pages processed. EN Menu maps 93