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Ricoh Pro C651EX Troubleshooting Manual

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Troubleshooting: TCRU
Model Name:
Pro C651EX/Pro C751EX/Pro C751
Read this manual carefully before using this machine and keep it handy for future reference.
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Summary of Contents for Ricoh Pro C651EX

  • Page 1 Troubleshooting: TCRU Model Name: Pro C651EX/Pro C751EX/Pro C751 Read this manual carefully before using this machine and keep it handy for future reference.

  • Page 2: How To Read This Manual

    How to Read This Manual Introduction This manual contains detailed instructions and notes on the operation and use of this machine. For your safety and benefit, read this manual carefully before using the machine. Keep this manual in a handy place for quick reference. Symbols This manual uses the following symbols: CAUTION...

  • Page 3: Important

    Important • In no event will the company be liable for direct, indirect, special, incidental, or consequential damages as a result of handling or operating the machine. • The manufacturer shall not be responsible for any damage or expense that might result from use of other than genuine parts from the manufacturer with your office products.

  • Page 4: Table Of Contents

    Table of Contents How to Read This Manual ................... 2 Introduction....................2 Symbols......................2 Important ....................... 3 Notes ......................3 1. Before You Begin ................7 1.1 Guide to Components ................. 7 1.2 Adjustment Settings for Skilled Operators Menu......... 8 1.3 Advanced Settings for Custom Papers ............9 1.4 Before you change a setting ...............
  • Page 5 3.4.5 Uneven Density within 90 mm (3.5 in.) of the Trailing Edge ..... 51 3.4.6 Periodic Density Fluctuation (1)............53 3.4.7 Periodic Density Fluctuation (2)............54 3.4.8 Color (1): Black Faint During Full Color Printing ....... 56 3.4.9 Color (2): Entire Image Faint ............58 3.4.10 Color (3): Faded Vertical Streaks During Full Color Printing ....
  • Page 6 4.10 Cleaning the Paper Feed Path..............113 4.10.1 Cleaning the Paper Feed Path in the Wide LCT (Trays 3-5) ..114 4.10.2 Cleaning the Paper Feed Path in the Multi Bypass Tray (Tray 6) ...................... 116 4.10.3 Cleaning the Paper Feed Rollers and Paper Feed Belt in the Interposer ....................

  • Page 7: Before You Begin

    1. Before You Begin If the machine will not print, does not print as expected, or exhibits any other problem, find the problem in this manual and troubleshoot accordingly. CAUTION Before you replace any unit: • To prevent electrical shock, turn off the color controller on the machine control panel, switch off the operation power switch then the main power switch, and then disconnect the machine from the power supply.

  • Page 8: Adjustment Settings For Skilled Operators Menu

    1.2 Adjustment Settings for Skilled Operators Menu To access the Adjustment Settings for Skilled Operators menu: 1. Press the [User Tools] key. 2. Press [Adjustment Settings for Skilled Operators]. 3. Press [Login]. 4. Enter your login user name, and then press [OK]. If you are logging in as the administrator for the first time, enter "admin".

  • Page 9: Advanced Settings For Custom Papers

    1.3 Advanced Settings for Custom Papers This section explains how to access the advanced settings for custom papers. The machine's administrator can adjust the custom paper settings registered in [Custom Paper]. 1. Press the [User Tools] key on the control panel. 2.

  • Page 10: Troubleshooting Service Call Problems (Sc Codes)

    2. Troubleshooting Service Call Problems (SC Codes) 2.1 What Are SC Codes? If an error occurs during operation, the machine displays an SC code ("SCnnn", where "nnn" is a three-digit number). The machine stops and cannot be used when an SC code is displayed. If an SC code appears: 1.

  • Page 11: Sc Code List

    2.2 SC Code List This table contains a list of selected SC codes. If the SC code that is displayed on the control panel is listed in this table, carry out the recommended procedure. If the SC Code is not listed in this table, contact your service representative. Important: •...

  • Page 12: Troubleshooting Image Quality Problems

    3. Troubleshooting Image Quality Problems This section describes some common image quality problems and explains how to resolve them. Paper Feed Direction The dark arrow in each illustration indicates the direction of paper feed. 3.1 Color Toner Spotting/Staining 3.1.1 Paper Is Spotted with Toner Paper is soiled with toner spots of 0.5–1 mm (0.02–0.04 inches) in diameter.
  • Page 13 Solution: Increase the temperature by 5 °C in [44: Fusing Heat Roller Temperature Adj] in [Advanced Settings]. Print 20 sheets of the image, then another 10. Does this eliminate the problem? Finished! Go to the next step. Increase the temperature by and additional 5 °C in [44: Fusing Heat Roller Temperature Adj].

  • Page 14: Colored Spots

    3.1.2 Colored Spots Colored spots appear at 189 mm or 40 mm (7.5 inches or 1.6 inches) intervals. 189 mm (7.5 in.) 40 mm (1.6 in.) CEZ539 Cause: (a) Colored spots appear at 189 mm (7.5 inches) intervals The drum unit is scratched or stained. (b) Colored spots appear at 40 mm (1.6 inches) intervals The charge roller is scratched or stained.
  • Page 15 (a) Colored spots at 189 mm (7.5 inches) intervals 1. To identify the affected color, print three full-page, solid-fill A3 or DLT sheets for each of white and black, and three full-page, halftone A3 or DLT sheets for each of cyan, magenta, and yellow. 2.
  • Page 16 (b) Colored spots at 40 mm (1.6 inches) intervals 1. To identify the affected color, print three full-page, solid-fill A3 or DLT sheets for each of white and black, and three full-page, halftone A3 or DLT sheets for each of cyan, magenta, and yellow. 2.

  • Page 17: Colored Streaks (1)

    3.1.3 Colored Streaks (1) Colored streaks parallel to the paper feed direction appear. CEZ540 Cause: • The charge roller is stained. • The cleaning unit for PCU has worn out. • The drum unit surface is scratched. Solution: 1. To identify the affected color, print three full-page, solid-fill A3 or DLT sheets for each of white and black, and three full-page, halftone A3 or DLT sheets for each of cyan, magenta, and yellow.

  • Page 18: Colored Streaks (2)

    3.1.4 Colored Streaks (2) Extended, blurred colored streaks parallel to the paper feed direction appear. The streaks also appear randomly in the margins. CEZ541 Cause: If the temperature or humidity is low, remaining toner might be missed by the cleaning blade of the cleaning unit for intermediate transfer belt or transfer unit, causing streaks to appear sporadically.

  • Page 19: Colored Streaks (3)

    3.1.5 Colored Streaks (3) Colored streaks appear in solid-filled areas. CEZ542 Cause: If the toner contains small clumps, they disintegrate in the development unit, producing colored streaks. This problem may occur if the machine is left unattended for a long period or the toner bottle is kept out of its moisture-proof bag for a long period.

  • Page 20: Black Streaks

    3.1.6 Black Streaks Short black streaks appear on a black halftone image. 300 mm (12 in.) 60 mm (2.4 in.) 60 mm (2.4 in.) CNT004 Cause: A sheet is bent at the entrance to the fusing unit and comes into contact with the edge of the paper delivery tank, where static electricity builds up on the sheet through friction.

  • Page 21: Two 13-Mm Long Vertical Streaks

    3.1.7 Two 13-mm Long Vertical Streaks Two 13-mm long vertical streaks appear within 110 mm (4.4 inches) from the leading edge. 110 mm (4.4 in.) 13 mm (0.5 in.) 67 mm (2.6 in.) 13 mm (0.5 in.) CNT005 Cause: The invert exit drive rollers or invert exit idle rollers in the machine's left drawer are soiled.
  • Page 22 4. Pull down and open the cover D5. CEZ255 5. Turn the gear in the back while using a slightly damp cloth on: (1) Invert exit drive rollers 1 (as you rotate the gear) (2) Invert exit idle rollers 2 CEZ258 6.

  • Page 23: Two 24-Mm Wide Streaks

    3.1.8 Two 24-mm Wide Streaks Two 24-mm wide streaks parallel to the paper feed direction appear. 24 mm (0.9 in.) 56 mm (2.2 in.) 24 mm (0.9 in.) CNT006 Cause: The exit drive rollers, exit idle rollers, exit relay drive rollers, or exit relay idle rollers in the machine's left drawer are soiled.
  • Page 24 4. Pull up and open the cover D4. CEZ249 5. Turn the knob D1 while using a slightly damp cloth on: (1) Exit drive rollers (2) Exit idle rollers (3) Exit relay drive rollers (4) Exit relay idle rollers CNT015 6.

  • Page 25: Stained Paper Edges

    3.1.9 Stained Paper Edges Solution: 1. If the paper edges are stained, carry out the procedure in 3.6.1, "Insufficient Toner Fusing". 3.1.10 Stained Background Random "powdered" dots appear, creating a dirty background. The background may be partially or completely stained. Completely stained background Partially stained background CEZ543...

  • Page 26: Ghosting

    3.1.11 Ghosting A ghost image of an image to be printed appears at a distance of 189 mm (7.5 inches) to the side of the intended image. 189 mm (7.5 in.) CNT007 Cause: The image transfer current is transmitted to the drum, where a potential difference occurs between a developed area and non-developed area and causes the intended image to be reproduced.

  • Page 27: Scratched Images And Stained Paper Edges

    3.1.12 Scratched Images and Stained Paper Edges Scratched images or soiled paper edges appear. CNT008 Cause: When a relatively stiff, thick paper is delivered, the entrance guide plate for the transfer unit is warped toward the intermediate transfer belt due to the stiffness of the paper.

  • Page 28: Toner Scatter

    3.2 Toner Scatter 3.2.1 Toner Scatter (1) Toner is scattered around a solid-fill print. CEZ545 Cause: This may occur if printed at low temperature or humidity. Note: • To adjust the following settings, pre-register the type of paper in use as a custom paper.
  • Page 29 3. Adjust the setting for the side 2 of the paper. Configure the following settings in [Advanced Settings] for the custom paper in use. <Printing in black and white> Increase the scaling factor by 5 percentage points in [33: Paper Transfer Current;...

  • Page 30: Toner Scatter (2)

    3.2.2 Toner Scatter (2) Parts of a line exhibit splatter. This may occur in a line that is 5 mm (0.2 inches) or less from the leading edge, or in a line that is 1.5 to 5 mm (0.06 to 0.2 inches) from an image on the side of the image facing the trailing edge.
  • Page 31 a) Line splatter that is 5 mm (0.2 inches) or less from the leading edge Increase the leading edge margin to more than 5 mm (0.2 inches) using one of the following procedures: (1) Adjusting the shift image In [Advanced Settings] for the custom paper in use, specify [08: Adj Image Position of Side1 With Feed] for the side 1 of the paper and [09: Adj Image Position of Side2 With Feed] for the side 2.

  • Page 32: Toner Scatter (3)

    3.2.3 Toner Scatter (3) Parts of a line or character exhibit splatter. This may occur in a line or character that is 8 to 13 mm (0.3 to 0.5 inches) from the trailing edge and 20 mm (0.8 inches) or less from the left edge facing the paper feed direction. 8-13 mm (0.3-0.5 in.) 20 mm (0.8 in.) CN T009...
  • Page 33 Solution: <Printing in full color> 1. In [Advanced Settings] for the custom paper in use, select [27: Image Transfer Current: FC: Black]. 2. Check the present value. Is it lower than 50 μA ? Carry out all of the following: (1) Increase the value by 5 μA in [27: Image Transfer Current: FC: Black].

  • Page 34: Color Loss

    3.3 Color Loss 3.3.1 Colorless Spots Colorless spots appear in solid-filled areas. CEZ547 Cause: If the toner contains small clots, they fail to be transferred, producing colorless spots. This problem may occur if the machine is left unattended for a long period or the toner bottle is taken out of its moisture-proof bag for a long period of time.

  • Page 35: White Dots/Lines

    3.3.2 White Dots/Lines White dots or short lines appear, spaced at intervals of 189 mm (7.5 inches) in the direction of the paper feed. 189 mm (7.5 in.) CEZ548 Cause: The drum unit is stained. Solution: 1. To identify the affected color, print three full-page, solid-fill A3 or DLT sheets for each of cyan, magenta, black, and green.

  • Page 36: Vertical White Streaks

    3.3.3 Vertical White Streaks White streaks of 1 to 8 mm (0.04 to 0.3 inches) long and perpendicular to the paper feed direction appear. CEZ604 Cause: One of the charge rollers is soiled. Note: If white streaks appear at 189 or 40 mm (7.5 or 1.6 inches) intervals, carry out the procedure in 3.1.2, "Colored Spots".
  • Page 37 Solution: 1. To identify the affected color, print three full-page, halftone A3 or DLT sheets for each of cyan, magenta, yellow, and black. 2. Detach the charge roller of the affected color, wipe its surface with a well- wrung-out damp cloth, wipe it with a dry cloth until no moisture remains, and then reattach the roller.

  • Page 38: White Spots

    3.3.4 White Spots White spots of 0.2–0.3 mm (0.008–0.01 inches) in diameter appear. CEZ549 Cause: This may occur if printed at low temperature or humidity. Note: • To adjust the following settings, pre-register the type of paper in use as a custom paper.
  • Page 39 3. Adjust the setting for the side 2 of the paper. Make the following settings in [Advanced Settings] for the custom paper in use. <Printing in black and white> Decrease the scaling factor by 5 percentage points in [33: Paper Transfer Current;...

  • Page 40: Blister-Like White Spots

    3.3.5 Blister-like White Spots White spots 0.3–0.5 mm (0.01–0.02 inches) in diameter surrounded by denser spots (blister-like white spots) appear. CEZ602 Cause: This may occur if a solid image is printed on coated paper, if a solid image is printed during duplex printing, or if printing is done at low temperature. Solution: If blister-like white spots appear, carry out the procedure in 3.6.1, "Insufficient Toner Fusing".

  • Page 41: Mottling

    3.3.6 Mottling Mottling occurs in solid-filled areas. Normal Mottled Cause: This may occur if: • Using paper with a rough surface • Continuously printing solid fills covering small areas • Printing in a low humidity environment • Printing in a high humidity environment Note: •...
  • Page 42 Solution: 1. To identify the affected color, print three full-page, solid-fill A3 or DLT sheets for each of cyan, yellow, magenta, and black. 2. In the [Adjustment Settings for Skilled Operators] menu, execute [0201: Adjust Image Density]. 3. Print the image. Is the problem resolved? Finished! Print 100 full-page, solid-fill A3 or DLT sheets in the affected color.

  • Page 43: Density Problems

    3.4 Density Problems 3.4.1 Uneven Image Density The density is uneven. Solution: The solution depends on the type of unevenness. Carry out the appropriate procedure from those in the following table: (A) The density is uneven across the entire image. Affected area Solution The density from...
  • Page 44 (B) The density is uneven in a part of the image. Affected area Solution The leading edge In the [Adjustment is fainter. Settings for Skilled Operators] menu, execute [0201: Adjust Image Density]. If the problem persists, see p.47, "Fainter cez555 Leading Edge".
  • Page 45 (C) The vertical density fluctuates periodically Affected area Solution Periodic vertical In the [Adjustment density Settings for Skilled fluctuation Operators] menu, execute [0201: Adjust Image Density]. If the problem persists, see p.53, "Periodic cez560 Density Fluctuation (1)".

  • Page 46: Uneven Density From Top To Bottom

    3.4.2 Uneven Density from Top to Bottom The density is uneven from top to bottom. CEZ561 Important: You can adjust the density of halftone images, but not that of solid fills. Cause: This may occur at high temperature or humidity. Solution: 1.

  • Page 47: Fainter Leading Edge

    3.4.3 Fainter Leading Edge The leading edge is fainter. CEZ562 Cause: At low temperature or when using thin coated paper, this may occur if the paper transfer current is insufficient. At high temperature, this may occur if the paper transfer current is excessive. Important: This solution only works when the thickness of the paper is equivalent to Paper Weight 4 or higher.
  • Page 48 Solution: 1. Make a note of the present value in the following setting in [Advanced Settings] for the custom paper in use. <Printing in black and white> [35: Paper Transfer Current; Lead Edge: B&W] <Printing in full color> [36: Paper Transfer Current; Lead Edge: FC] 2.

  • Page 49: Fainter Trailing Edge

    3.4.4 Fainter Trailing Edge The trailing edge is fainter. CEZ563 Cause: This may occur because of insufficient or excessive paper transfer current when using paper weighing approximately 160 g/m (60 lb. Cover) or heavier at low temperature. Note: • To adjust the following settings, pre-register the type of paper in use as a custom paper.
  • Page 50 Solution: 1. Measure in millimeters how far the fainter area extends from the trailing edge. 2. Configure the following settings in [Advanced Settings] for the custom paper in use. <Printing in black and white> In [41: Ppr Transfer Current Trail Edg Dist: BW], enter the value you measured in Step 1 plus an additional 10 mm.

  • Page 51: Uneven Density Within 90 Mm (3.5 In.) Of The Trailing Edge

    3.4.5 Uneven Density within 90 mm (3.5 in.) of the Trailing Edge Printing in the area extending approximately 90 mm (3.5 inches) from the trailing edge is fainter or denser when the temperature or humidity is low. 90 mm 90 mm (3.5 in.) (3.5 in.) CEZ564...
  • Page 52 <If the area within 90 mm (3.5 inches) of the trailing edge is denser> 1. In [Advanced Settings] for the custom paper in use, select [20: Transfer Timing Roller Feed Speed Adj]. 2. Check the present value. Is it lower than -0.5%? Contact your service representative.

  • Page 53: Periodic Density Fluctuation (1)

    3.4.6 Periodic Density Fluctuation (1) The vertical density fluctuates periodically. Solution: The solution depends on the interval. Interval Solution Approximately 12-18 mm (0.5-0.7 inches) Contact your service representative. Approximately 50 mm (2 inches) Replace the charge roller. If the problem persists, contact your service representative.

  • Page 54: Periodic Density Fluctuation (2)

    3.4.7 Periodic Density Fluctuation (2) The vertical column density fluctuates at 11 mm (0.4 inches) intervals on the right edge perpendicular to the paper feed direction. This fluctuation does not occur in the area that is 90 mm (3.6 inches) or less from the trailing edge. 90 mm (3.6 in.) CNT010...
  • Page 55 Solution: 1. In [Advanced Settings] for the custom paper in use, select [20: Transfer Timing Roller Feed Speed Adj]. 2. Check the present value. Is it higher than +0.5% ? No further improvement is likely. Contact your service representative. Increase the value by 0.1 percentage points. 3.

  • Page 56: Color (1): Black Faint During Full Color Printing

    3.4.8 Color (1): Black Faint During Full Color Printing Black is fainter than normal during full color printing. Normal CEZ566 Black is fainter CEZ584 Cause: If black is used when printing in full color mode with black toner only, the printing may become faint.
  • Page 57 Procedure 1: Increasing the image transfer current for black in full color mode 1. In [Advanced Settings] for the custom paper in use, select [27: Image Transfer Current: FC: Black]. 2. Increase the value by 10 μA. 3. Print the image. Is the problem resolved? Finished! Increase the value by 5 μA.

  • Page 58: Color (2): Entire Image Faint

    3.4.9 Color (2): Entire Image Faint The entire image is fainter than normal. CEZ585 Cause: This may occur if: • Continuously printing an image that consumes little toner • The machine has not been used for a long time • The machine is located somewhere very humid and has not been used for a while Solution: 1.

  • Page 59: Color (3): Faded Vertical Streaks During Full Color Printing

    3.4.10 Color (3): Faded Vertical Streaks During Full Color Printing Faded vertical streaks may appear during full color printing. CNT001 Cause: This may occur if: • Printing is done at low temperature or humidity • Coated paper or paper that produces high paper-to-paper friction is used •...
  • Page 60 Procedure 1: Increasing the paper transfer current in full color mode 1. In [Advanced Settings] for the custom paper in use, select [32: Paper Transfer Current: FC]. 2. Increase the value by 5 μA. 3. Print the image. Is the problem resolved? Go to the next step.

  • Page 61: Color Is Too Dense

    3.4.11 Color Is Too Dense The entire image is denser than normal. CEZ568 Cause: This may occur if: • Continuously printing an image that consumes much toner • The machine has not been used for a long time • The machine is located somewhere very humid and has not been used for a while Solution: 1.

  • Page 62: Broken Thin Lines

    3.4.12 Broken Thin Lines Thin lines (1 dot lines in 1200 dpi images) break. CEZ569 Cause: Oblique (approximately 45°) thin lines or thin lines printed in faint colors are likely to contain breaks. Solution: 1. In the [Adjustment Settings for Skilled Operators] menu, execute [0201: Adjust Image Density].

  • Page 63: Blurred Images

    3.4.13 Blurred Images Lens-shaped blurred images appear at 189 mm (7.5 inches) intervals. 189 mm (7.5 in.) 189 mm (7.5 in.) CNT002 Cause: If the machine is left unattended for a long period in an environment where temperature and humidity are high, corona products on the drum absorb moisture to prevent a buildup or removal of static electricity on the drum.

  • Page 64: Dropouts (Character Voids)

    3.4.14 Dropouts (Character Voids) Dropouts (character voids) occur when characters or lines are printed in black-and- white mode. CN T003 Note: • To adjust the following settings, pre-register the type of paper in use as a custom paper. For details about registering custom papers, see "Registering a Custom Paper", Paper Settings Reference.
  • Page 65 Procedure 2: Printing black using four colors (YMCK) in full-color mode Do the following on the Command WorkStation (CWS). 1. Select "Properties..." for the image. 2. Click the "Color" tab. 3. In "Color mode", select "Expert Settings...". 4. Click the "Gray & Black Processing" tab. 5.

  • Page 66: Gloss Problems

    3.5 Gloss Problems 3.5.1 Glossy Lines Glossy lines appear every 20 or 26.5 mm (0.8 or 1.0 inches). 20 mm or 26.5 mm (0.8 or 1.0 in.) CEZ570 Cause: This may occur if coated or thin paper is used. Note: •...
  • Page 67 Solution: 1. Print the image on twenty sheets. Do glossy lines appear on the tenth sheet and later sheets? Go to the next step. You cannot resolve the problem with this procedure. Contact your service representative. 2. In [Advanced Settings] for the custom paper in use, select [44: Fusing Heat Roller Temperature Adj.] and decrease the value by 5 °C.

  • Page 68: Vertical Glossy Lines

    3.5.2 Vertical Glossy Lines Glossy lines perpendicular to the paper feed direction appear. 251 mm 251 mm (10 inches) (10 inches) CEZ603 Cause: Glossy lines perpendicular to the paper feed direction may appear 251 mm (10 inches) from the boundary of the margin and the solid image (in the direction opposite to the paper feed direction).

  • Page 69: Fusing Problems

    3.6 Fusing Problems 3.6.1 Insufficient Toner Fusing This section explains how to resolve the problem of insufficient toner fusing on printed copies. Note: • To adjust the following settings, pre-register the type of paper in use as a custom paper. For details about registering custom papers, see "Registering a Custom Paper", Paper Settings Reference.
  • Page 70 This will slow down the printing to give the toner more time to fuse. However, because of this, throughput will be reduced. Example when printing on A4/LT paper: <Pro C651EX> If the process speed is changed from [High] to [Middle]: 65 cpm 45 cpm...

  • Page 71: Troubleshooting Paper Delivery Problems

    4. Troubleshooting Paper Delivery Problems 4.1 Frequent Paper Misfeeds Coated or another type of unsupported paper is loaded in the machine's tray. Load paper not supported by the machine's paper tray (Trays 1 and 2) in the wide LCT (Trays 3-5) or another paper tray supporting the paper. For details about the size and type of paper that can be loaded in the paper trays, see "Recommended Paper Sizes and Types", About This Machine.
  • Page 72 Sheets are curled or wavy. • Flatten curls and waviness before loading paper. • Turn the sheets the other way up or smooth the edges before loading. • Stacking too many sheets may cause the sheets on top to curl greatly. If this happens, reduce the number of stacked sheets.

  • Page 73: Messages Reporting Paper Misfeeds

    4.2 Messages Reporting Paper Misfeeds Paper misfeeds are reported by messages prefixed with problem codes. Resolve the problem according to the code. This section only lists the codes for problems that can be resolved by the user. If a problem code not listed in this section appears, contact your service representative.

  • Page 74: If (J032) Appears

    4.2.1 If (J032) Appears Cause: The edge of a sheet is jammed in the intermediate transfer belt or paper transfer roller. Floppy paper is likely to cause paper misfeeding because it tends to stick to the intermediate transfer belt and paper transfer roller. Solution: <Color printing>...
  • Page 75 <Black-and-white printing> In [Advanced Settings] for the custom paper in use, set [35: Paper Transfer Current; Lead Edge: B&W] to "100%". Print 25 sheets of the image. Is the problem resolved? Finished! Go to the next step. Set [35: Paper Transfer Current; Lead Edge: B&W] to "80%". Print 25 sheets of the image.

  • Page 76: If (J080) Appears

    4.2.2 If (J080) Appears Cause: The correct paper feed speed is not being maintained. When using slippery paper, traction may be lost, reducing paper feed speed. Solution: 1. In [Advanced Settings] for the custom paper in use, set [07: Regist Jam Detection with Feed Dir] to [Off].

  • Page 77: If (J083) Appears

    4.2.3 If (J083) Appears Cause: Paper is jammed in the fusing belt stripper plate. This is likely to occur if: • Thin or coated paper is used • A solid image that consumes a lot of toner is printed at the leading edge •...
  • Page 78 When printing on one side only <If it is acceptable for the image to be incompletely printed at its edge> Trim the image at its leading edge to increase the margin. 1. In [Advanced Settings] for the custom paper in use, select [13: Adjust Erase Margin of Leading Edge] and increase the value by 0.5 mm.
  • Page 79 When printing on both sides <If it is acceptable for the image to be incompletely printed at its edge> 1. In [Advanced Settings] for the custom paper in use, select [14: Adjust Erase Margin of Trailing Edge] and increase the value by 0.5 mm. 2.

  • Page 80: If (J097) Appears

    4.2.4 If (J097) Appears Cause: Paper is skewed. Solution: Depending on the cause of the problem, do one the following: The side fences in the paper trays are not positioned correctly. Adjust the side fences to match the paper width. When you close the paper tray, the side fences may become misaligned due to the weight of the paper.

  • Page 81: If (J098) Appears

    The skew detection level is too high. The skew detection level may be too high. Decrease the skew detection level. 1. In the [Adjustment Settings for Skilled Operators] menu, increase the value in [0109: Skew Detection Level]. Increase the value to reduce the detection level. If the problem persists even though the setting has reached its maximum value, contact your service representative.
  • Page 82 Sheets of mixed type, thickness, or color are loaded in the paper tray. Load identical sheets in the paper tray. When printing from a tray containing sheets of mixed color, you can prevent paper misfeeding by specifying the following settings: 1.

  • Page 83: If (J099) Appears

    4.2.6 If (J099) Appears Cause: Double feeding has occurred. Solution: Depending on the cause of the problem, do one of the following: Coated or another type of unsupported paper is loaded in the machine's tray. Load paper not supported by the machine's paper tray (Trays 1 and 2) in the wide LCT (Trays 3–5) or another paper tray that supports the paper.

  • Page 84: Paper Skew

    4.3 Paper Skew The side fences in the paper tray are too far apart. If the side fences are too far apart, the paper may misfeed. Adjust the side fences to match the paper width. When you close the paper tray, the side fences may become misaligned due to the weight of the paper.

  • Page 85: Wrong Detection Of Skew

    4.4 Wrong Detection of Skew An envelope is used. The machine feeds envelopes with their flaps open. If the flap has an oblique edge, a skew may be wrongly detected. Disable skew detection function. 1. In the [Adjustment Settings for Skilled Operators] menu, set [0108: Skew Detection] to [Off].

  • Page 86: Double Feeding

    4.5 Double Feeding Is the paper feed roller covered with paper dust? Paper dust may decrease the traction of the paper feed roller and result in double feeding due to paper slippage or insufficient separation. Cleaning the paper feed roller will restore traction and so prevent double feeding. For details about cleaning the paper feed roller of each of the machine's trays (Trays 1 and 2) see the Replacement Guide.
  • Page 87 Special or coated paper is used. • Is the airflow strong enough? The factory-set airflow of the wide LCT may not be strong enough to separate the sheets. Increase the airflow. <If custom paper is used> 1. In [Advanced Settings] for the custom paper in use, increase the value in [02: Adjust Wide LCT Fan Level].

  • Page 88: Wrong Detection Of Double Feeding

    4.6 Wrong Detection of Double Feeding Preprinted paper is used. If the sensor detects the printed part of preprinted paper, it may wrongly detect it as double feeding. Disable the double feeding detection function. <If custom paper is used> 1. In the [Adjustment Settings for Skilled Operators] menu, set [0105: Double Feed Detect] to [Off].

  • Page 89: Paper Misfeeding

    4.7 Paper Misfeeding Have you ruffled the paper properly? Not ruffling the paper properly may cause paper misfeeding. Remove the paper, ruffle it, and reload it. When you close the paper tray, the side fences may become misaligned due to the weight of the paper.
  • Page 90 An envelope is used. Depending on the type of envelope, air trapped inside may be squeezed out when the paper feed roller picks up the envelope and cause slippage leading to a misfeed. • Is the wide LCT fan disabled? In [Advanced Settings] for the custom paper in use, set [01: Wide LCT Fan Setting] to [Off].

  • Page 91: Paper Feed Problems Affecting Image Quality

    4.8 Paper Feed Problems Affecting Image Quality 4.8.1 The Image Is Positioned Incorrectly Original Output Paper feed direction CEZ523 Cause: Depending on the paper thickness, floppiness, edge roughness, and curl, the image may become mispositioned. Solution: Adjust the image position. <If custom paper is used>...
  • Page 92 <If custom paper is not used> 1. In the [Adjustment Settings for Skilled Operators] menu, adjust the image position. • To adjust the position horizontally, change the value in [0101: Adjust Image Position With Feed Direction]. • To adjust the position vertically, change the value in [0102: Adjust Image Position Across Feed Direction].

  • Page 93: Image Scaling Error On The Side 1 Of Paper

    4.8.2 Image Scaling Error on the Side 1 of Paper Original Output Paper feed direction CEZ524 Cause: An image scaling error may occur because of expansion or contraction of the paper. Solution: Adjust the image scaling. 1. In [Advanced Settings] for the custom paper in use, adjust the image scaling. •...

  • Page 94: Image Scaling Error On The Side 2 Of Paper

    4.8.3 Image Scaling Error on the Side 2 of Paper Original Output Side 1 Side 2 Paper feed direction CEZ525 Cause: An image scaling error on the side 2 of the paper may occur because the paper expands or contracts after the image on the side 1 of the paper has been fused. Solution: Adjust the scaling for the side 2 of the paper and minimize the difference in print size between the side 1 and the side 2.

  • Page 95: Image Skewing

    4.8.4 Image Skewing Original Output Paper feed direction CEZ526 Cause: Depending on the machine's operating environment (levelness and temperature), the printed image may become vertically skewed. Solution: Adjust image skew. 1. Print the image in black and white. 2. Check the direction of the skew. 3.

  • Page 96: White Spots

    4.8.5 White Spots Paper feed direction CEZ527 Cause: Paper dust on the guide board and transfer timing roller may stick to the paper and produce white spots. Some types of paper, such as recycled paper, roughly cut paper, and high-friction coated paper produce a lot of paper dust, which will likely stick to the paper.

  • Page 97: Paper Edges Are Soiled (1)

    4.8.6 Paper Edges Are Soiled (1) 138 mm 138 mm (5.5 in.) (5.5 in.) CNT011 Cause: The paper feed rollers in the machine's left drawer are soiled. Solution: Clean the paper feed rollers in the machine's left drawer. For details about cleaning the paper feed roller, see the Replacement Guide.

  • Page 98: Paper Edges Are Soiled (2)

    4.8.7 Paper Edges Are Soiled (2) CNT012 Cause: The antistatic brushes in the exit transport and invert transport of the machine's left drawer are soiled or the anti-static brushes in Finisher SR5030/Booklet Finisher SR5040 are soiled. Solution: Carry out the following sequence of procedures. Terminate the sequence as soon as the problem is resolved.
  • Page 99 Procedure 1: Cleaning the antistatic brushes in the exit transport and inverter transport of the machine's left drawer Clean the antistatic brushes in the exit transport and inverter transport of the machine's left drawer with a blower brush. • The antistatic brush in the exit transport CEZ256 •...
  • Page 100 Procedure 2: Disabling the decurl setting and delivering sheets with their printed side facing down Note: • Apply this procedure only when all of the following conditions are met. • The decurler unit is attached. • A back-curl is required to flatten curls. •...

  • Page 101: Paper Edges Are Soiled (3)

    4.8.8 Paper Edges Are Soiled (3) 40 mm (1.6 in.) 120 mm (4.8 in.) CNT014 Cause: The paper feed speed of the decurler unit is too high. Note: • To adjust the following settings, pre-register the type of paper in use as a custom paper.

  • Page 102: Paper Edges Are Soiled (4)

    4.8.9 Paper Edges Are Soiled (4) 14 mm 14 mm 66 mm (0.5 in.) (2.6 in.) (0.5 in.) CNT013 Cause: The paper transport rollers or guide plates in the buffer pass unit are soiled. Solution: Clean the paper transport rollers and guide plates in the buffer pass unit. 1.
  • Page 103 3. Wipe the guide plates (especially the ridgelines of the bends and the cut-and- bent portions) with a cloth moistened with alcohol. CNT018 4. Close the guide plates and push the buffer pass unit back into the machine.

  • Page 104: Expansion And Contraction (1)

    4.8.10 Expansion and Contraction (1) The leading edge margin is too narrow and the image has shrunk lengthwise. Original Output Paper feed direction CEZ528 The paper has creased and no print appears where the crease has occurred. Original Output Paper feed direction CEZ529 Cause: The paper feed speed of the transfer timing roller is too high.

  • Page 105: Expansion And Contraction (2)

    4.8.11 Expansion and Contraction (2) The leading edge margin is too wide and the image has stretched lengthwise. Original Output Paper feed direction CEZ530 Cause: The paper feed speed of the transfer timing roller is too high. Solution: Increase the feed speed of the transfer timing roller. 1.

  • Page 106: Scratches, Streaks, Or Vertical Creases Appear On The Image

    4.8.12 Scratches, Streaks, or Vertical Creases Appear on the Image Cause: The paper feed speed of the exit motor, switchback entrance, or switchback exit is too high or too low. Solution: <If scratches or streaks appear on the side 2 of the paper> You can lessen the problem by decreasing the paper feed speed.

  • Page 107: Decurling Results In Scratches, Streaks, Or Creases

    4.8.13 Decurling Results in Scratches, Streaks, or Creases Cause: The paper feed speed of the decurler unit is too high or too low. Solution: <If scratches or streaks appear on the side 2 of the paper or continuous noise results> You can lessen the problem by decreasing the paper feed speed of the decurler unit.
  • Page 108 <If scratches, streaks, or creases appear on the side 1 of the paper> You can lessen the problem by increasing the paper feed speed of the decurler unit. 1. In the [Adjustment Settings for Skilled Operators] menu, check the present degree of decurling (Off, Weak, or Strong) in [0116: Adjust Paper Curl].

  • Page 109: The Leading/Trailing Edge Margin Is Long

    4.8.14 The Leading/Trailing Edge Margin Is Long Cause: In some custom paper presets, the leading/trailing edge margins are wide enough to prevent paper jams. Leading-edge margin Trailing-edge margin Paper feed direction CEZ586 Solution: Adjust the leading/trailing edge margins. 1. In [Advanced Settings] for the custom paper in use, reduce the value by 0.5 mm in [13: Adjust Erase Margin of Leading Edge].

  • Page 110: Curling

    4.8.15 Curling To eliminate curling without using the decurler unit, lower the heat roller temperature. Lowering the temperature may result in: • Unsatisfactory fusing • Reduced glossiness • Smeared for halftone images on uncoated paper 1. In [Advanced Settings] for the custom paper in use, select [44: Fusing Heat Roller Temperature Adj] and reduce the value by 5 °C.

  • Page 111: Attaching The Tab Sheet Holder

    4.9 Attaching the Tab Sheet Holder If the tab sheet holder is attached, you can prevent air from escaping at the trailing edge of the paper and improve separation. This will prevent double feeding and misfeeding of special or coated paper loaded in the wide LCT (Trays 3–5).
  • Page 112 3. Slide the end fence against the paper so that the tab sheet holder's clips pass through the fence and click into place. CEZ590 Note: You can use the tab sheet holder for paper of the following sizes: • Paper with a width of 288.0–330.2 mm (11.34–13.00 inches) and a length of 182.0–487.7 mm (7.17–19.20 inches).

  • Page 113: Cleaning The Paper Feed Path

    4.10 Cleaning the Paper Feed Path Clean the paper feed path if white spots appear due to paper dust sticking to the paper, or if paper misfeeding or double feeding occurs. Guide Board Wipe the guide board with a well-wrung-out damp cloth. To clean the innermost recesses, use a cloth that is as large as your palm.

  • Page 114: Cleaning The Paper Feed Path In The Wide Lct (Trays 3-5)

    4.10.1 Cleaning the Paper Feed Path in the Wide LCT (Trays 3-5) Clean the guide board and paper feed rollers in the wide LCT. The procedure is explained using Tray 3 as an example. The procedure is the same for Trays 4 and 5. 1.
  • Page 115 5. Remove the two black screws on the paper feed unit U2, and then pull out the paper feed unit U2 until it stops. CEZ204 6. Clean the paper feed rollers. For details about detaching and reattaching the paper feed rollers, see the Replacement Guide.

  • Page 116: Cleaning The Paper Feed Path In The Multi Bypass Tray (Tray 6)

    9. After cleaning, restore the machine so that it resumes operation. Note: • For details about the general and periodic cleaning of the machine, see the Replacement Guide. 4.10.2 Cleaning the Paper Feed Path in the Multi Bypass Tray (Tray 6) Clean the guide board and paper feed rollers in the multi bypass tray (Tray 6).
  • Page 117 4. Remove the black screw. CEZ169 5. Remove the plate. CEZ170 6. Remove the black screw on the sensor positioning plate. CEZ171 7. Push the sensor positioning plate to the left. If this plate is not pushed to the left, the feed roller cannot be removed.
  • Page 118 8. Clean the paper feed rollers. For details about detaching and reattaching the paper feed rollers, see the Replacement Guide. 9. Slide the paper tray to the right. CEZ505 10. Clean the guide board. CEZ506 11. After cleaning, restore the machine so that it resumes operation. Note: •...

  • Page 119: Cleaning The Paper Feed Rollers And Paper Feed Belt In The Interposer

    4.10.3 Cleaning the Paper Feed Rollers and Paper Feed Belt in the Interposer Clean the paper feed belt and paper feed rollers in the interposer. The procedure is explained using the interposer upper tray. The procedure is the same for the lower tray. 1.

  • Page 120: Post-Processing Option Troubleshooting

    5. Post-Processing Option Troubleshooting 5.1 Finisher SR5030/Booklet Finisher SR5040 5.1.1 Delivered Sheets Are Not Stacked Properly Solution: Depending on the cause of the problem, do one of the following: Coated paper is being used. If coated paper is being used, attach the auxiliary tray for thin coated paper. For details about attaching the auxiliary tray for thin coated paper, see "When Coated Paper Is Not Properly Aligned"...

  • Page 121: Large Delivered Sheets Are Not Stacked Properly

    5.1.2 Large Delivered Sheets Are Not Stacked Properly Cause: When using large-size or coated and paper-to-paper friction is very high, a sheet may push against another or paper deflection may occur. This is likely to occur if: • B4L, 8" x 14"L, or larger size of paper is used. •...
  • Page 122 Paper deflection Because of high paper friction, the delivered sheet may arch up and become crimped. Paper exit Output tray Paper feed direction CEZ596 Solution: Depending on the cause of the problem, do one of the following: <Sheet bending> The auxiliary tray is not attached. •...
  • Page 123 <One sheet pushing out another or sheets becoming crimped> The auxiliary tray is not attached. • If using paper of Paper Weight 3 or lower, attach the auxiliary tray for thin coated paper. For details about attaching the auxiliary tray for thin coated paper, see "Using Thin Coated Paper"...

  • Page 124: Trailing Edge Of Stapled Sheets Close To The Paper Exit

    5.1.3 Trailing edge of stapled sheets close to the paper exit Cause: If the stapled sheets are curled strongly or become limp after delivery, the trailing edge of the sheets may be too close to the paper exit when the paper is stacked. If this happens, stapled sheets, when delivered, may push the previously delivered sheet, resulting in paper bending or misfeeding.

  • Page 125: Sheets Cannot Be Stapled Properly

    5.1.4 Sheets cannot be stapled properly Cause: When the sheets are fed to the staple unit inside the finisher, they may be overlaid, resulting in a misalignment of 5 mm (0.2 inches) relative to each other after stapling. When coated or other paper producing higher paper-to-paper friction is used, the paper edges are not aligned properly, resulting in misaligned stapling.

  • Page 126: Multi-Folding Unit

    5.2 Multi-Folding Unit 5.2.1 Inaccurate Folding (Folding Deviation) Cause: Depending on paper hardness, inaccurate folds may result. This is referred to as folding deviation. Solution: Change the folding position by adjusting the position of the paper edge stopper for folding. •...

  • Page 127: Folding Deviation

    5.2.2 Folding Deviation Cause: Depending on paper hardness, folding deviations (skewed folding) may appear. A deviation may appear if the edge dimensions of the parts between folds are different. For example, in the following illustration, the dimensional difference between the top (L2[2]) and bottom (L2[1]) edges is a deviation.
  • Page 128 Adjusting screw Adjusting screw hole Mounting screw CEZ599 Mounting screw Adjusting screw hole Adjusting screw CEZ600 Adjusting screw Mounting screw Adjusting screw hole CEZ601...
  • Page 129 The screws adjust the folding deviations of the following parts: Z-fold Paper feed direction CEZ532 Half Fold Paper feed direction CEZ533 Letter Fold-in Paper feed direction CEZ535...
  • Page 130 Letter Fold-out Paper feed direction CEZ534 Double Parallel Paper feed direction CEZ536 Gate Fold Paper feed direction CEZ537 mark indicates the leading edge (relative to the paper feed direction), and mark indicates the trailing edge.
  • Page 131 <How to adjust the folding deviation> This procedure is the same for L1, L2, and L3. 1. Open the front cover of the multi-folding unit. 2. Remove the mounting screw. If the mounting screw is attached to the adjusting screw hole, unfasten it. 3.

  • Page 132: Folds Soiled By Multi-Sheet Folding

    5.2.3 Folds soiled by multi-sheet folding Cause: If multi-sheet folding is performed after a large number of Z-folds have been performed, the tip of the blade used for the multi-sheet folding may be soiled, resulting in soiled paper. CEZ571 This will produce paper soil of 1-3 cm (0.4-1.2 inches) in width (equal to the width of the blade) in the fold in the center of paper.
  • Page 133 3. Turn the N11 dial counterclockwise until the blade appears. The blade is located in the right part of the multi-folding unit. CEZ512 4. Wipe the tip and top of the blade with a soft dry cloth. Be careful not to damage the blade. CEZ513 5.

  • Page 134: Edges Of Letter Fold Bent

    5.2.4 Edges of letter fold bent When letter folding is applied, the edge of the inner flap may become bent. CEZ592 Solution: The solution depends on whether letter folding is applied to multiple sheets or a single sheet. <When letter folding is applied to multiple sheets> 1.
  • Page 135 <When letter folding is applied to a single sheet> Note: • This procedure is applied especially to coated paper. • To adjust the following settings, pre-register the type of paper in use as a custom paper. For details about registering custom papers, see "Registering a Custom Paper", Paper Settings Reference.

  • Page 136: Z-Folding Is Not Performed Properly

    5.2.5 Z-Folding is Not Performed Properly Cause: If a sheet is curled and its edge touches the guide board, proper folding may not be possible. Upward curl (radius 4 cm [1.6 in.] or less) at leading edge of delivered paper. Paper feed direction CEZ572 Solution:...

  • Page 137: Folded Sheets Are Not Stacked Properly

    5.2.6 Folded Sheets Are Not Stacked Properly Cause: If a large number of half-folded multi-sheet is delivered, the edge of the sheets may bulge and some part of the edge will be swollen. If this happens, other sheets loaded on the bulged paper may turn over in the output tray. This is likely to occur if: •...

  • Page 138: Buffer Pass Unit

    5.3 Buffer Pass Unit 5.3.1 The Fan Is Noisy You can change the buffer pass unit fan activation setting according to the type of paper and ambient temperature. 1. In the [Adjustment Settings for Skilled Operators] menu, change the value in [0118: Buffer Pass Unit Fan Activation Setting].

  • Page 139: High Capacity Stacker

    5.4 High Capacity Stacker 5.4.1 Delivered Sheets Are Severely Curled Cause: Sheets with downward curls cause strong friction at their leading edges. This may result in paper misfeeds. Sheets will not be ejected completely and the trailing edges will be left inside the paper exit. If this happens, other sheets may slip under the delivered sheets, so that the delivered sheets may be curled when loaded.
  • Page 140 (3) The trailing edge of the sheet, while delivered, is left in the paper exit. Paper exit Paddle Stacker shift tray Paper feed direction CEZ575 (4) The next sheet to be delivered slips under the sheet still in the paper exit and bends back.
  • Page 141 Solution: Straighten out the sheet by decurling it upward. 1. Load the sheets the other way up. 2. Print the image. Is the problem resolved? Finished! Move to the next step. To follow the steps below, attach the decurler unit. 3.

  • Page 142: Delivered Sheets Are Not Aligned

    5.4.2 Delivered Sheets Are Not Aligned Cause: When sheets are delivered to the stacker tray, because of paper-to-paper friction, the paddle fails to pull the trailing edge back into the front guide, resulting in misalignment. The paper edge stopper also fails to push back the protruding leading edge. This is likely to occur if: •...
  • Page 143 (3) The paper edge stopper fails to push back the protruding leading edge and align the sheet as required. Paper exit Paper edge stopper Paddle Stacker shift tray Paper feed direction CEZ579 (4) Stacked sheets are not aligned properly. Paper exit Paper edge stopper Paddle...
  • Page 144 Solution: Curl the sheet upward. To do this, the decurler unit must be attached. 1. In the [Adjustment Settings for Skilled Operators] menu, set [0116: Adjust Paper Curl] to [Adjust Curl: Weak]. 2. Print the image. Is the problem resolved? Finished! Go to the next step.

  • Page 145: Improving Throughput

    6. Improving Throughput 6.1 Reducing the Waiting Time Prior to Printing After receiving a print job, the machine usually stops to let the fusing temperature reach an appropriate level for printing. The waiting time for the fusing unit to cool down may be quite long, especially before printing on thin paper.

  • Page 146: Improving Throughput When Printing On Paper With A Thickness Equivalent To Paper Weight 6 Or 7

    6.2 Improving Throughput When Printing on Paper with a Thickness Equivalent to Paper Weight 6 or 7 When printing on paper with a thickness equivalent to Paper Weight 6 or 7, the machine's copy/print speed must be reduced to 70% of full speed (for A4 paper) so that the degree of toner fixation can be enhanced.
  • Page 147 Note: • The following list shows the copy/print speed for each item in [19: Process Speed Setting]: < Pro C651EX > • High 65 cpm (full speed) • Middle 45 cpm (70% of full speed) • Low 32 cpm (50% of full speed) <Pro C751EX/Pro C751>...

  • Page 148: Improving Throughput When Printing Black-And-White Jobs And Color Jobs

    6.3 Improving Throughput when Printing Black-and- White Jobs and Color Jobs When printing intermixed black-and-white and color print jobs, switching from full- color mode to black-and-white mode takes time, causing loss of throughput each time the mode is switched. When the machine prints a full-color print job followed by a black-and-white job, you can improve throughput by adjusting the number of black-and-white sheets the machine prints in full-color mode before switching to black-and-white mode.
  • Page 149 D074-9503A...

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