Chapter 1414-5As a result of inspection, it was found that the symptom was solved by replacing the H.V. transfer PCB with a new one.F-14-3Field RemedyWhen the symptom occurs, check the transfer roller for improper attachment or soiled surface. If the symptom still occurs, replace the H.V. transfer PCB with anew one.FM2-0261 H.V. Transfer PCB Assembly14.2.1.3.2 Distorted image/skewed image occurs around 45mm from trailing edge after attaching new type compression spring to rearside of registration roller0010-4143iR2270 / iR2870 / iR3570 / iR4570 / / / / / iR2230 / / / iR3530 / / / / /[ Case in the field ]DescriptionIn the field, the symptom occurred because the washer was returned to its original position after the new type compression spring was attached to the rearside of the registration roller.Field RemedyThe new service part compression spring has been offered to the rear side of the registration roller. With regard to the new service part, no washer is requiredwhen attaching and color is also changed to gold. Therefore, pay attention to these points at time of replacement of the rear compression spring.Note: No modification was made to the compression spring that is attached to the front side of the registration roller.Type of service part compression spring and necessity of washerRear side: New type GOLD spring (FU6-2020) does not need the washer.Rear side: Old type SILVER spring (FU6-2014) needs the washer (XD1-1106-219).Front side: Existing spring (FU5-2611) needs the washer (XD1-1106-219).14.2.1.3.3 White dots on black solid image/sandy image: Occurs even after executing "D-GAMMA" at time of replacement of drum unit0010-4162iR2270 / iR2870 / iR3570 / iR4570 / / / / / iR2230 / / / iR3530 / / / / /[ Inspected by Canon Inc. ]DescriptionUpon installation or when the drum unit is replaced with a new one, the following service mode item has to be executed to prevent white dots (sandy image)from occurring: [Service mode > COPIER > FUNCTION > DPC > D-GAMMA]. Although rare in the case of a text image, however, the symptom mayappear in a limited degree when a fully black solid image is copied right after the execution of the item. This is because there is a lot of resistance in theprimary charging roller of the newly installed drum unit. In order to correct this symptom, follow the procedure below.Field RemedyMake the following selections in sequence: [Service mode > COPIER > TEST > PG], and then1. In [TYPE], enter "12" (Halftone H60).2. In [PG-PICK], enter the number of the cassette on which A3 size paper is loaded.For example, If A3 paper is set on the cassette 1, enter "1" in this service mode item.3. In [PG-QTY], enter "50" and press the Start key. (50 sheets of test print will be output.)14.2.1.3.4 Uneven Density in Sub Scanning Direction0007-7464iR2270 / iR2870 / iR3570 / iR4570 / / iR2270N / / iR2870N / / iR3570N / / iR4570N / iR2230 / / / iR3530 /This fault can occur when the machine is left alone for about 10 min to 5 hr without removing a paper jam.
