Chapter 1515-152-2) Compute the average of C adjustment value 1 and C adjustment value 2 (i.e., (C adjustment value 1 + C adjustment value 2)/2), and use the result as the ad-justment value for C main scanning direction. (in the case of the above figure, C main direction adjacent value = ((0 + (-16))/2)) = -8.Likewise, obtain the M main scanning direction adjustment value and the Y main scanning direction adjustment value for magenta and yellow.2-3) Add the Y/M/C main scanning direction adjustment value to the values indicated in service mode:Be sure to add the adjustment value to the existing value, not replacing the latter with the former:Y: service mode>ADJUST_GR>IMG-REG>REG-H-YM: service mode>ADJUST_GR>IMG-REG>REG-H-MC: service mode>ADJUST_GR>IMG-REG>REG-H-C3) Correct the color displacement sub scanning direction.As with the correction in main scanning direction, correct color displacement in sub scanning direction.Points to Note:- Use the following service mode items:Y: service mode>ADJUST_GR>IMG-REG>REG-V-YM: service mode>ADJUST_GR>IMG-REG>REG-V-MC: service mode>ADJUST_GR>IMG-REG>REG-V-C- If the sub scanning direction adjustment value cannot be divided, round up to the nearest whole number.4) Print a color displacement correction PG, and check to see that the point of the Bk line with the most overlap with other color line is identified by 0.15.3.1.5.8 Blurred Image/Line Caused by Condensation0014-4427Color iR C3380G / Color iR C2880G / Color iR C3380i / Color iR C3380 / Color iR C2880i / Color iR C2880 / iR C3480 / iR C3480i / iR C3080i / iR C2550The machine fails to create normal images because of condensation.Draw out the process unit and leave the machine alone so that it will become used to the room temperature.15.3.1.6 Partially Blank/Streaked15.3.1.6.1 Partial missing of image occurs after sliding out Process Unit: Dent is made on ITB0016-1355Color iR C3380G / Color iR C2880G / Color iR C3380i / Color iR C3380 / Color iR C2880i / Color iR C2880 / iR C3480 / iR C3480i / iR C3080i / iR C2550[ Inspected by Canon Inc. ]DescriptionSince the right door was closed with the Process Unit pulled out, dentÅ@was made on the ITB.Field Remedy (in case a dent has been made on the ITB)If the ITB has had a dent on it, replace the ITB unit with a new one.Note: When closing the right door, be sure to make sure that the Process Unit is closed completely.FM2-5522 I.T.B Assembly15.3.1.6.2 White line appears when copying CA-1 chart: Contact image sensor (CIS) is faulty0016-4065Color iR C3380G / Color iR C2880G / Color iR C3380i / Color iR C3380 / Color iR C2880i / Color iR C2880 / iR C3480 / iR C3480i / iR C3080i / iR C2550[ Inspected by Canon Inc. ]DescriptionSince a while line appeared when copying a grayscale area of CA-1 chart, the contact image sensor (CIS) was replaced with a new one.Field Remedy1. Make a reduction (enlargement) to check whether the white line is attributed to a scanning or printing factor. (If the position in which the white line appearsdoes not change, the symptom is attributed to the printer.)2. If the symptom is attributed to a scanning factor, check to see if duct is on the copyboard glass or the image contact sensor.3. If no dust is found in Step 2, re-fit the connector of the contact image sensor.4. If the symptom still occurs, re-fit all the connectors of the Reader Controller PCB.5. If Step 4 does not work on the symptom, replace the contact image sensor with a new one.FM2-1563 Contact Image Sensor Assembly15.3.1.6.3 Color displacement/void at (rear) end of image occurs upon installation or replacement of drum unit (process cartridge)0016-4526Color iR C3380G / Color iR C2880G / Color iR C3380i / Color iR C3380 / Color iR C2880i / Color iR C2880 / iR C3480 / iR C3480i / iR C3080i / iR C2550[ Inspected by Canon Inc. ]DescriptionSince color displacement or void at the (rear) end of image occurred upon installation or replacement of a drum unit (process cartridge), the drum unit (processcartridge) was replaced with a new one.CauseThe sealing tape affixed onto the drum unit ripped, and the ripped part of the tape was left on the drum unit. This prevented this machine from performingimage correction by means of the patch sensor, causing color displacement.Field RemedyWhen the symptom is occurring, replace the affected drum unit with a new one.15.3.1.6.4 Void occurs in main scanning direction: One side of ITB cover is not closed firmly0016-4969Color iR C3380G / Color iR C2880G / Color iR C3380i / Color iR C3380 / Color iR C2880i / Color iR C2880 / iR C3480 / iR C3480i / iR C3080i / iR C2550[ Inspected by Canon Inc. ]DescriptionSince void occurs in the main scanning direction, the ITB cover was closed again for solution.
