THIS TECHNICAL PUBLICATION IS THE PROPERTY OF CANON U.S.A. AND IS CONFIDENTIAL INFORMATION TO BE RETAINED FOR REFERENCE PURPOSES BY THE AUTHORIZED DEALER WITH WHOM SERVICE AGREEMENTS HAVE BEEN ENTERED INTO. USER AGREES TO INDEMNIFY CANON U.S.A. INC., AND TO HOLD IT HARMLESS AGAINST ANY CLAIM ARISING BY REASON OF THE POSSESSION OR USE THEREOF. ITS UNAUTHORIZED USE IS PROHIBITED. For additional technical information, please visit the Canon Systems and Technical Support Division website at: www.support.cusa.canon.com. You can also call the Technical Support Center at 1-800-528-2830 or contact your Regional Support Office

MODELS AFFECTED / SERIAL NUMBERS AFFECTED: Color imageRUNNER C3200 / All

SUBJECT: Preventive measures for possible color displacement in the paper feed (sub scanning) and the main scan (front

to rear) direction.

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GENERAL: There are several possibilities that can lead to color mis-registration in both the main scanning (front to back) and sub-scanning (paper feed) direction. They are listed below.

DETAILS:

The following five details for correcting color mis-registration are listed in order of importance. Please see SERVICING PROCEDURES. I. Gear Replacement due to color mis-registration in the sub-scanning (paper feed) direction 1.The 42T gear of the ITB Assembly and the two 42T gears of the ITB Drive Assembly were changed from molded plastic to machined plastic. The gear in the ITB Assembly will be given a new part number and available as a service part. The gears in the ITB Drive Assy. will now be as follows: The dowel pin gear is available as a service part and the other gear is now pressed on the Swing Gear Assembly and unavailable as a service part. The entire Swing Gear Assembly must now be ordered.

II.Transfer Belt/Drive Roller Cleaning due to color mis-registration in the sub-scanning (paper feed) direction 1.In a high usage environment, excess toner will accumulate around the inside of the Transfer Belt area especially soiling the Transfer Guides and the Drive Rollers. This will result in color mis-registration by as much as 3mm. Prior to purchasing a new Transfer Belt, it is highly recommended that the special cleaning procedure described below be implemented.

III.Adding Side Shims due to color mis-registration in the main scanning (front to rear) direction 1.Through normal wear, the front to back tightness of the Drive Rollers can wear causing color mis-registration in the scanning direction. Shims can be added to reduce “freeplay”.

IV.Laser Adjustment due color mis-registration in the main scanning (front to rear) direction 1.There is the possibility under certain conditions that the laser cam/s can be in the wrong position thereby causing a color mis-registration in the main scanning direction. There can be several factors, which can lead to this. They are: a. Performing a DCON ram clear.

b. Swapping laser units to test from either another machine or another color from the same machine. c. Replacing a defective laser unit with a new unit.

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V.Connector Reseating due to color mis-registration in the main scanning (front to rear) direction due to loose wiring on the DC Controller/System Controller and the two interconnection ribbon cables between the DC Controller and the System Controller 1.There is the possibility that during rough shipment or during relocation of an existing machine, wiring on the DC Controller and/or the System Controller or the two interconnection ribbon cables between the DC Controller and the System Controller can become loosened. When this happens, the laser motors do not receive the correct alignment signal from the DC Controller. Hence, the laser lenses are out of alignment causing color mis-registration in the main scanning (front to rear) direction. There is a simple procedure to rule out loose cabling.

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SERVICING PROCEDURES: If color mis-registration is noticed, perform the following five steps in the order that they are shown: I. Color Mis-Registration in the sub-scanning (paper feed) direction due to Gear Wear: 1.If color displacement is noticed, check the gear on the ITB Assembly, the gear mounted with a dowel pin on the Swing Gear Assembly and the pressed on gear also mounted on the Swing Gear Assembly for excessive wear and or damaged teeth and replace all three at the same time. See SERVICE PARTS and Figures 1-3 for more information. II.Color Mis-Registration in the sub-scanning (paper feed) direction due to Excessive Toner Build-Up: 1.Remove the ITB Assembly from the machine and carefully remove the IT Belt and rest it on a piece of paper to avoid accumulating scratches or dirt. Do not damage the belt, as it might be reused. 2.Clean the following rollers with alcohol: Drive Roller: FB6-2931-000 Tension Roller: FB6-2932-000 Transfer Roller 2: FB6-2934-000 See Figure 4. 3.Clean the IT Belt Guides of toner using a lint free cloth. See Figure 5. 4.Cleaning the inside of the IT Belt 4a.There are two methods to clean the inside of the IT Belt. The first method is to lay the IT Belt on a sheet of paper and lifting the middle portion by using another sheet of paper (don’t get fingerprints on the sheet) clean the inside of the belt with lint free paper. See Figure 6. 4b.The second method is to prepare a cardboard box and rest the belt on it in a vertical direction and again clean the inside of the belt using lint free paper. See Figure 7. 5.Reinstall the IT Belt and the ITB Assembly. Make copies and check for mis-registration. III.Color Mis-Registration in the main scanning direction (front to rear) due to Excessive Front to Back “Freeplay”: 1.Check for front to back looseness and add the appropriate shim if needed to eliminate any play. See Figures 8, 9, 10. IV.Color Mis-Registration in the main scanning (front to rear) direction due to Laser Cam Out-of-Alignment Condition: To determine if the laser cam/s are at fault, go into Service Mode and perform a PG Type 6 and then a PG Type 10. Check Figures 11-14 to determine if the laser cams are possibly at fault. Once it has been determined that a laser cam/s are at fault perform the following steps:

1.Remove the 4 laser units from the machine. See Figure 15. 2.Remove the laser cover to expose the lens. See Figure 16. 3.Adjust the cammed gear until it is at its center position. See Figure 17. 4.Reassemble the laser unit and reinstall in the machine. 5.Turn on the power and once again try PG Type 6 and PG Type 10.

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V.Color Mis-Registration in the main scanning (front to rear) direction due to Laser Cam Out-of-Alignment Condition due to loose wiring on the DC Controller/System Controller or loose interconnections (two ribbon cables) between the DC Controller and the System Controller: To determine if the DC Controller/System Controller wiring is possibly at fault, go into Service Mode and perform a PG Type 6 and then a PG Type 10. Check Figures 11-14 to determine if the laser cams are incorrectly positioned due to loose wiring. Perform the following steps:

1.Unplug the machine from the Wall Socket 2.Remove the rear panel to access the DC Controller and the System Controller. 3.Disconnect all connectors form the DC Controller, the System Controller and the two interconnection ribbon cables between the DC Controller and the System Controller. 4.Reconnect all connectors removed in step 5c. 5.Plug machine back into the Wall Socket. 6.Turn on machine and again try PG Type 6 and PG Type 10. If the problem is still present, enter Service Mode. 7.Perform COPIER>FUNCTION>MISCP>P-PRINT, which will output a COPY SERVICE REPORT. Retain this report! 8.Perform COPIER>CLEAR>DC-CON and COPIER>CLEAR>MN-CON * 9.Switch off the machine and unplug from the Wall Socket. 10.Plug machine back into the Wall Socket and turn on. 11.Program the Service Mode settings back into memory. 12.Once again, perform a PG Type 6 and a PG Type 10. If the symptoms persist, try changing the DC Controller or the System Controller.

*NOTE: When performing a DCON Clear, all Service Data will be eliminated and have to be replaced using the COPY SERVICE REPORT. When performing a MN-CON Clear all file management information will be lost including mailbox attachments.

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SERVICE PARTS:

New/Old Part Number Description Qty Interchangeability

Old FU3-0266-000 42T Gear of ITB Assy. 1 - > 0 N

New FU3-0266-040 42T Gear of ITB Assy. 0 - > 1 Y

Old FG6-8965-000 ITB Belt Drive Assy. 1 - > 0 N

New FG6-9663-020 ITB Belt Drive Assy. 0 - > 1 Y

Old FU3-0336-000

42T Gear of ITB Drive

Assy.

1 - > 0 N

New FU3-0546-000

42T Gear of ITB Drive

Assy.

0 - > 1 Y

Old

FU3-0335-000 ▼

FU3-0356-000 (Unavailable)

42T Gear (Pressed on) 1 - > 0 N

New FG6-9662-000 Swing Gear Assembly 0 - > 1 Y

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FIGURES

Figure 1

Figure 2

42T Gear of the ITB Assembly FU3-0266-040 (Outer Gear)

ITB Belt Drive Assembly FG6-8965-000>>>FG9-4015-000>>FG6-9663-000

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Figure 3

*Consists of only the Swing Gear Assembly. The other parts which may or may not have to be ordered are: E-Ring-XD2-1100-642, Dowel Pin-XD3-2200-182, Shim-FB2-6285-020, 42T Gear-FU3-0356-000, Ball Bearing-XG9-0264-000

Swing Gear Assembly

*FG6-9662-000

42T Gear-FU3-0546-000 Shim-FB2-6285-020 E-Ring-XD2-1100-642 Dowel Pin-XD3-2200-182 Ball Bearing-XG9-0264-000

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Figure 4 Figure 5

Figure 6 Figure 7

Paper

Box

IMPORTANT NOTE When cleaning the 3 rollers, make certain no toner is left on the roller ends. If there is, color mis-registration may still be apparent.

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Figure 8

Figure 9 Figure 10

Fit Shim here part number XD1-1108-225 Removal of the gear cluster is necessary. Fit Shim here part number XD1-1108-212 Removal of the gear cluster is necessary.

Play

Play

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PG Type 6 Paper feed direction Figure 11 Figure 12 NOTE: For Figure 12: This figure has been created and enhanced for viewing purposes. Normally, viewing the Rear to Front (main scanning direction) of a PG Type 6 will have vertical lines with all colors overlapping. In the above figure (Figure 12) we see the lines deviate from the Rear to Front by several millimeters indicating a faulty laser setting.

Figure 13 Figure 14

PG Type 10 Paper Feed Direction

Lines of the PG Type 6 widen as they are viewed from front to rear (main scanning direction). Approximately 1-2mm apart

Machine Rear

Machine Front

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Figure 15 Figure 16

Figure 17

Cammed gear is shown set to center position.

Only turn cammed gear clockwise to prevent breakage.