Canon MF4690 - ImageCLASS B/W Laser Service Manual

Also see for ImageCLASS MF4690: Reference guide Instructions Starter Guide Operation guide Driver guide

Contents

Chapter 1414-28error appearing on the touch panel (LCD).Numeric keypad key 2Checks to see if data can be correctly read from all areas of D-RAM (SDRAM). If an error occurs making this check, the test is aborted, with an error appearingon the touch panel (LCD).F-14-714.13.3 Scan Test14.13.3.1 Scan Test ((2) SCAN TEST) 0016-2129Scan test ((2) SCAN TEST)Press the numeric keypad key 2 on the test mode menu to select the SCAN test.Press numeric keypad keys 1 during the SCAN test to carry out the individual tests described below.Numeric keypad key 1Corrects the LED output of the contact sensor and sets its parameters automatically. (AGC adjustment)14.13.4 Print Test14.13.4.1 Print Test ((3) PRINT TEST) 0016-2130Print test ((3) PRINT TEST)Press the numeric keypad key 3 on the test mode menu to select the print test.Press numeric keypad keys 2 and 4 during the print test to generate test patterns as described below. Two kinds of service test patterns are available. Other testpatterns are reserved for factory/development purposes.Numeric keypad key 2(2) BLACK: All-black outputNumeric keypad key 4(4) ENDURANCE: Black belt outputTo cancel test printing, press the stop key.F-14-814.13.5 Modem Test14.13.5.1 MODEM Test ((4) MODEM TEST) 0016-2131MODEM test((4) MODEM TEST)These tests test modem and NCU transmission and reception. The modem tests check whether signals are sent correctly from the modem by comparing the soundD-RAM TEST 29696KBD-RAM TEST 29696KBD-RAM TEST 29696KBcomplete (error)2969629696D-RAM TEST 29696KB[1] - [2]D-RAM TEST 29696KBcomplete (no error)WRT= 33CC RD= 33ECADR= BF840201Use it to make sure that the printpattern does not have white linesor uneven image.Use it to make sure that the printpattern does not have contraction/elongation of an image or dirt/blackline.s