Canon LBP6670dn Series Service Manual

55 5-25-2Trouble Shooting > Trouble Shooting > Test Pages > Controller-Test pageTrouble Shooting > Trouble Shooting > Test Pages > Controller-Test pageTrouble ShootingTest PagesPrinting test pages helps determine if the printer is functioning.CAUTION:There are two types of test pages: engine-test page and Main Controller-test page. Printa test page to make sure the printer engine and the Main Controller are functioning.■ Engine-test pageThere are two types of engine-test pages simplex print and duplex print.a. Simplex printOpen and close the cartridge door three times continuously within 2 seconds during thestandby period. The engine-test page should have a test print pattern on one side of mediaas shown below.b. Duplex printOpen and close the cartridge door five times continuously within 2 seconds during thestandby period. The engine-test page should have a test print pattern on both sides of mediaas shown below.F-5-1■ Controller-Test pageThe data for test charts are created in the main controller. If no problem is found on the outputtest charts, the cause may lie in the PDL input or the reader.NOTE: Method to display the test printIt appears in the menu by pressing [Status Monitor/Cancel key] + [Utility]simultaneously.Test Print Pattarn image check itemB Grid chart Right angle accuracyStraight line accuracyD Print "E" in the entirearea. --D1 --The followings can be checked.• Firmware version• Service counter• PDL mode counter• Service mode setting valueI Solid black Transfer failure, White line, MarginJ Halftone (dark) Transfer failure, Black line, White line, MarginK Halftone (light) Transfer failure, Black line, White line, MarginL Grid chart Right angle accuracyStraight line accuracyX Halftone/Grid chart Right angle accuracyStraight line accuracyZ Solid white FoggingAW -- Print details of various service counters.BH -- Print product information.T-5-1