Ricoh Pro C7500 Owner's manual

For safe and correct use, be sure to read Safety Information

separately provided before using the machine.

Shared Maintenance Offering:

Troubleshooting

Original Instructions

TABLE OF CONTENTS

Introduction......................................................................................................................................................... 8

1. Before You Begin

About This Manual............................................................................................................................................. 9

About the Display for Options.........................................................................................................................10

Before You Change a Setting..........................................................................................................................11

About Printing Surfaces....................................................................................................................................12

Note about Vertical (In-track) and Horizontal (Cross-track) Directions......................................................14

2. Specifying and Checking Paper Settings

Adjusting Paper Settings.................................................................................................................................. 15

Paper Setting Flowchart.............................................................................................................................. 15

Improving Fusibility...................................................................................................................................... 15

Improving Transferability.............................................................................................................................18

Improving Paper Deliverability................................................................................................................... 18

3. Troubleshooting Image Quality Problems

Image Index......................................................................................................................................................19

Large Classification: Lines/Streaks.............................................................................................................19

Large classification: Spots........................................................................................................................... 24

Large classification: Full page.....................................................................................................................26

4. Image Quality Problem: Full Page

Dirtied Printouts.................................................................................................................................................39

Stains on the Area up to 204 mm (8 inches) Away from the Leading Edge of the Paper (Transparent

Film, etc.)...................................................................................................................................................... 39

Toner Blasting (Lines)...................................................................................................................................40

Toner Blasting (Trailing Edge).....................................................................................................................43

Toner Blasting (When Printing in 2 Colors)............................................................................................... 45

Granular Toner Stains on the Paper Edges (When Printing on Thick Paper)..........................................50

White Toner Stains on the Background on Black Paper (Banding-Shape)............................................ 50

Toner Stains of Mixed Colors (Horizontal Streaks).................................................................................. 51

Stains at the Edge of the Paper...................................................................................................................53

Disturbed Image...............................................................................................................................................56

Deterioration of Graininess in Halftone Areas.......................................................................................... 56

Uneven Density.................................................................................................................................................58

The Areas around the Images Using the Special Toner (clear) Blur........................................................58

1

Uneven Density within 90 mm (3.5 inches) of the Trailing Edge............................................................. 59

Faint Small Solid-Fill Images....................................................................................................................... 60

Faint Black / White Streaks in the Areas Using Only Black.................................................................... 61

Mottling (Paper with Indentations and Other Textured Paper)................................................................64

Glossy Ghosting (Horizontal Glossy Streaks)........................................................................................... 66

Multiple Horizontal Glossy Streaks (Glossy Ghosting)............................................................................ 71

Uneven Density between the Left and Right Sides (at 40 mm (1.6 inches) Intervals)............................ 73

Uneven Density (Textured Paper)...............................................................................................................74

Uneven Density (Metallic Paper or Textured Paper).................................................................................79

Uneven Density: Mixed-color Images........................................................................................................81

Mottling of Uneven Density on Half-Tone Images.................................................................................... 82

Uneven Glossiness Occurring Partly.......................................................................................................... 83

Wavy Uneven Glossiness (on Thin Coated Paper)...................................................................................88

Hazing on the Sides / Arched Glossy Streaks..........................................................................................93

Uneven Glossiness on Side 2 (Back of the Paper)....................................................................................95

Uneven Glossiness when Printing on Thick Paper..................................................................................... 99

River Marks (Worm Tracks)......................................................................................................................104

Worm Marks, Creases, and Fusing Errors on Envelopes...................................................................... 109

Unprinted........................................................................................................................................................112

Faint Color at the Leading Edge of the Paper (White Spots).................................................................112

Faint Color at the Trailing Edge of the Paper (White Spots)..................................................................114

When Using Transparent Film.................................................................................................................. 116

White Spots (Unprinted: Around Clear-toner Images)...........................................................................117

White Streaks When Printing on Cast-Coated Paper.............................................................................119

White spots caused by fingerprints..........................................................................................................121

Faint Oval Spots at Paper Edges............................................................................................................. 121

Rippling, Uneven Streaks, or White Spots (Caused by Condensation)............................................... 123

Patchy Images on Text or at the Edge of the Image............................................................................... 124

Patchy Image (Clear Toner Image)..........................................................................................................126

Faintness and Other Problems...................................................................................................................... 130

Images Stretching (Margin Narrow at the Trailing Edge of the Paper)................................................130

Insufficient Gloss: Clear Image.................................................................................................................130

Excessive Gloss......................................................................................................................................... 133

2

Waves: Trailing Edge (A4 and larger)....................................................................................................135

White Stains/Ghosting When Printing on Transparent Film..................................................................135

5. Image Quality Problem: Lines/Streaks

Bands..............................................................................................................................................................143

Banding (General).................................................................................................................................... 143

Banding: 189 mm (7.5 inches) Intervals................................................................................................. 144

Banding Occurring Every 3 mm (0.1 inches) after Solid-Fill Image..................................................... 146

Banding at Random Pitch (Metallic Paper)............................................................................................. 150

Banding in Solid-Fill Areas Printed with Metallic (Gold) Toner.............................................................151

Horizontal Black Streaks in the area 9 mm (0.3 inches) from the leading edge of the paper........... 152

Horizontal Black Bands in the Area 60 mm (2.3 inches) from the Leading Edge of the Paper (Metallic

Paper).........................................................................................................................................................154

Horizontal Streaks (Synthetic Paper)....................................................................................................... 155

Horizontal Streaks of Uneven Density (Low-Resistance Paper).............................................................156

Horizontal Streaks in the Area 280-300 mm (11-11.8 inches) from the Leading Edge of the Paper

(Shock Jitter When Using Stiff Paper)...................................................................................................... 158

Paper Transfer Shock Jitter / Shock Jitter (When the Positions of K and S Toners Have Been Switched)

.................................................................................................................................................................... 159

Vertical (In-track) White Streaks (Glossy)............................................................................................... 163

Streaks............................................................................................................................................................ 165

Horizontal (Cross-track) Black Streaks at the Edge of the Image......................................................... 165

Glossy Lines at the Edge of the Paper......................................................................................................166

Horizontal (Cross-track) White Streaks across the Paper......................................................................174

White Stain at the Trailing Edge of the Image Using the Special Toner (White)................................. 176

White Streaks Parallel to the Paper Feed Direction................................................................................177

Vertical Glossy (In-track) Streaks (Due to the Toner Wax on the Image).............................................179

6. Image Quality Problem: Spots

Spots............................................................................................................................................................... 183

Black Spots (Granular Toner Clotting).................................................................................................... 183

White Spots, Colored Streaks..................................................................................................................186

Medaka (White Spots)............................................................................................................................. 187

White Spots/Toner Blasting..................................................................................................................... 189

Blister-like White Spots............................................................................................................................. 191

White Bird Tracks...................................................................................................................................... 196

3

Stains appear on the back of the paper approximately every 205 mm (8.1 inches) in the paper feed

direction..................................................................................................................................................... 197

7. Fanning the Paper/Cleaning

Fanning the Paper..........................................................................................................................................199

Clean the Paper Edges..................................................................................................................................201

8. Troubles Related to Paper Feeding and Delivery (Main)

Cleaning the Parts of the Machine............................................................................................................... 203

Cleaning the Machine's Trays 1 and 2................................................................................................... 203

Cleaning the Paper Feeding Section of the Bypass Tray....................................................................... 205

Cleaning around the Photoconductor......................................................................................................206

Clean the Transfer Entrance Guide Plate................................................................................................ 208

Cleaning the CIS Glass.............................................................................................................................208

Cleaning Contact Image Sensor Back Plate........................................................................................... 209

Cleaning the Machine's Transfer Unit......................................................................................................210

Cleaning the Rollers in the Paper Exit...................................................................................................... 213

Cleaning the Double-Feed Sensor...........................................................................................................216

Cleaning the Turned-Over Delivery Unit.................................................................................................217

Cleaning the Cooling Belt of the Turned-Over Delivery Cooling Unit..................................................218

Cleaning the Switchback Guide Plate..................................................................................................... 220

Cleaning the Pressure Separation Pawls.................................................................................................221

Double Feeding............................................................................................................................................. 222

J099 Appears............................................................................................................................................222

Double-feeding is erroneously detected or cannot be detected...........................................................222

Paper Misfeeding.......................................................................................................................................... 224

Paper Misfeeding (Main Tray).................................................................................................................224

Streaks, Scratches, Disturbed Image, Crease.............................................................................................226

Streaks or Scratches (How to Identify the Cause).................................................................................. 226

Image Deformation, Scratches, Streaks, Paper Creases or Bent Corners............................................227

Paper Jams, Sheets Becoming Bent or Damaged at the Corners Occurring with Turned-Over Paper

Delivery of Synthetic Paper and Plastic Sheets....................................................................................... 230

Creases on Thin Coated Paper................................................................................................................ 231

Creases or Worm Tracks (on Thin Paper)............................................................................................... 231

Stains on the Paper Edges........................................................................................................................ 235

4

13 mm (0.5 inches) Wide Roller Marks Appearing on the Leading Edge of Paper Delivered Face

Down.......................................................................................................................................................... 237

Toner Stains like Roller Marks (after Continuous Large Volume Printing on Coated Paper)...............238

Vertical White Streak Roller Marks..........................................................................................................239

White Spots or Scratches due to Paper Dust.......................................................................................... 241

White Streaks of Stains Appearing when Feeding Dark-Color Paper after White Coated Paper.....242

Paper Jam.......................................................................................................................................................243

Frequent Paper Misfeeds..........................................................................................................................243

Useful Functions for Determining the Cause of a Paper Jam (without Purging)....................................244

J033/J082 Appears................................................................................................................................ 244

J033 / J034 / J083 (Paper Jam at the Fusing Unit during Solid-Fill Image Printing)........................ 246

Paper Jams Occur with Crumpling of the Leading Edge When Thin Paper Is Used............................252

J048 Appears............................................................................................................................................254

J080 Appears............................................................................................................................................257

Paper Bending or Paper Jams (J034 / J035 / J036 / J084 / J085 / J086)...................................258

Skew............................................................................................................................................................... 260

J097 (Excessive Skew)............................................................................................................................. 260

J098 (Shifting)........................................................................................................................................... 262

9. Related to Paper Feeding and Delivery (Main/Buffer Pass Unit)

Roller Marks Appearing When Dark-Color Paper Is Fed after White Paper...........................................265

Roller Marks Appearing When Dark-Color Paper is Fed after White Paper.......................................265

10. Troubles Related to Paper Feeding and Delivery (Vacuum Feed LCIT RT5150)

Vacuum Feed LCIT RT5150..........................................................................................................................267

Common Troubleshooting........................................................................................................................ 267

Double Feeding (J099, J470, J471, J485, J486, J500, J501).......................................................... 267

Paper Misfeeds (J430, 431, 445, 446, 460, 461).............................................................................270

Excessive Skew/Shifting (J097, J098)................................................................................................... 273

Attaching the Side Fences and End Fence Correctly..............................................................................276

Attaching the Small Tab End Fence to the Wide Large Capacity Tray.................................................279

Attaching the Tab Fence in the Wide Large Capacity Tray...................................................................279

Attaching the Side Fences, Auxiliary Side Fence, and End Fence (for Long Paper)........................... 279

Measuring the Curl / Decurling...............................................................................................................280

Cleaning the Vacuum Feed LCIT RT5150...............................................................................................281

5

Cleaning the Wide LCT Connection Unit................................................................................................ 283

Using the Paper Retainer Correctly..........................................................................................................283

Paper Jam Occurs in the Paper Transfer Unit..........................................................................................285

11. Post-Processing Option Troubleshooting

Buffer Pass Unit...............................................................................................................................................287

Roller Marks Appearing When Feeding Dark-Color Paper after Feeding White Paper.................... 287

Glossy banding approximately 14 mm (0.6 inches) wide occurs at an area 33 mm (1.3 inches) from

the center in the paper feed direction......................................................................................................287

The Buffer Pass Unit's Fan is Noisy...........................................................................................................292

Cleaning the Buffer Pass Unit................................................................................................................... 292

Finisher/Booklet Finisher...............................................................................................................................294

The Leading Edge of Paper Rolls Up (JAM607 / JAM609)................................................................ 294

Not Stacked Properly (Carbonless Paper of Paper Weight 0/1)........................................................ 296

Envelopes with triangular flaps are not stacked properly......................................................................297

Trailing Edge of Stapled Sheets Close to the Paper Exit........................................................................ 299

Stapled Sheets Are Scratched or Jammed..............................................................................................300

Stitching Missing, Incorrect Stitching Position, Ear-fold, or Misaligned Occurs.................................. 301

Paper Stitched inside is Stained............................................................................................................... 302

When Using the Booklet Finisher, a Paper Jam Occurs with only the Front Cover Delivered............ 302

Punched Holes are Torn and a Paper Jam Occurs.................................................................................303

Paper is Stained (Clean rollers and paper guides)................................................................................ 304

Interposer........................................................................................................................................................305

Paper Misfeeds or Double-Feeding Occurs........................................................................................... 305

Horizontal Streaks Occur When Loading a Full-Page, Solid-Fill Sheet............................................... 306

High Capacity Stacker.................................................................................................................................. 308

Sheets Are Curled..................................................................................................................................... 308

Sheets Are Not Aligned............................................................................................................................ 309

The Machine Wrongly Detects That the Tray Is Full............................................................................... 311

Paper Edges Are Stained..........................................................................................................................313

Other Post- Processing Options....................................................................................................................314

Thin Paper may have Problems such as Curling, Stacking Error, Paper Jam, and Sheets being Bent at

the Corners.................................................................................................................................................314

Metallic Paper and Synthetic Paper may have Problems such as Curling, Stacking Error, Paper Jam,

and Sheets being bent at the Corners..................................................................................................... 316

6

12. Problems Related to Throughput

Waiting Time Prior to Printing is Too Long................................................................................................... 319

Waiting Time Prior to Printing is Too Long (Other than Envelope)........................................................ 319

Waiting Time Prior to Printing is Too Long (Envelope)........................................................................... 320

Insufficient Fusibility....................................................................................................................................... 321

Insufficient Fusibility................................................................................................................................... 321

Throughput Reduced When Printing Jobs with Mixed Paper Type or Thickness, or After Changing Paper

Type or Thickness...........................................................................................................................................324

When Printing Jobs with Mixed Paper Type or Thickness......................................................................324

When Switching to a Different Paper Type or Thickness........................................................................324

7

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.

8

1. Before You Begin

About This Manual

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.

• Before you replace any unit:

• To prevent electrical shock, turn off the color controller on the machine control panel,

switch off the main power switch then the AC power switch, and then disconnect the

machine from the power supply.

• Allow the machine to cool for at least 30 minutes before replacing a part.

9

About the Display for Options

This machine displays all of the adjustment items in the Adjustment Settings for Operators menu and

advanced settings for custom paper regardless of whether or not the items are for options. Note that any

modifications to the option settings do not take effect unless the applicable options are installed on this

machine.

• For details about the options available for this machine, see "Machine Options", Specifications.

1. Before You Begin

10

Before You Change a Setting

• If the problem persists despite the setting being changed, restore the value you made a note of.

• Operating the machine with the changed setting may cause problems such as reduced print

quality.

• If the problem persists even though the setting has been changed, restore the value noted.

Operating the machine with the changed setting may cause problems, such as inferior printed

images.

Before You Change a Setting

11

About Printing Surfaces

Side 1 is the surface of the paper printed during one-sided printing, or the surface of the first print during

duplex printing.

Side 2 is the surface of the paper printed after side 1 has been printed during duplex printing.

Single-sided printing: Printed side face down

DFP406

A. Side 1

B. Paper feed direction of Side 1

Duplex printing: Printed side face down

DFP407

A. Side 1

B. Paper feed direction of Side 1

C. Side 2

D. Paper feed direction of Side 2

1. Before You Begin

12

Single-sided printing: Printed side face up

DFP408

A. Side 1

B. Paper feed direction of Side 1

Duplex printing: Printed side face up

DFP409

A. Side 1

B. Paper feed direction of Side 1

C. Side 2

D. Paper feed direction of Side 2

About Printing Surfaces

13

Note about Vertical (In-track) and Horizontal

(Cross-track) Directions

In this manual, with regard to the paper feed direction, the vertical and horizontal directions are as

shown below:

1

2

3

DFP311

1. Paper feed direction

2. Horizontal (Cross-track)

3. Vertical (In-track)

1. Before You Begin

14

2. Specifying and Checking Paper

Settings

Adjusting Paper Settings

Paper Setting Flowchart

DXU801

Is there a problem with fusing?

Paper Delivery Image quality in fusing and image

transfer

Is there a problem you want to solve?

Proceed to the "Improving

Fusibility" workflow.

Image position/density

Finished!

Has the problem been

resolved?

Proceed to the flowchart

"Improving Transferability".

Contact your service represen-

tative.

Specify the corresponding

setting in Adjustment Settings

for Operators and Custom

Paper Settings.

Is there a problem except for

fusing?

Proceed to the flowchart

"Improving Paper Deliverability".

No

NoNo

No

Yes Yes

Yes

Has the problem been

resolved?

Improving Fusibility

This section explains how to resolve the problem of insufficient toner fusing on printed copies.

15

• To adjust the following settings, pre-register the type of paper in use as a custom paper. For details

about registering custom papers, see "Changing Tray Paper Settings", Paper Settings.

Solution:

Carry out the following sequence of procedures. Terminate the sequence as soon as the problem is

resolved.

Procedure 1: Changing the fusing temperature

1. In [Detailed settings] for the custom paper you are using, select 1232: [Fusing

Temperature], and then adjust the value in the following corresponding settings by

5°C.

• 1232-01: Fusing Temperature: BW/FC/FCS: Heat Roller Temp

• 1232-06: Fusing Temperature: FCS: Heat Roller Temp: Clear/Special

• 1232-07: Fusing Temperature: FCS: Heat Roller Temp: White

• 1232-08: Fusing Temperature: FCS: Heat Roller Temp: Metallic

• 1232-26: Fusing Temperature: S: Heat Roller Temp: Clear/Special

• 1232-27: Fusing Temperature: S: Heat Roller Temp: White

• 1232-28: Fusing Temperature: S: Heat Roller Temp: Metallic

• 1232-46: Fusing Temperature: BW/FC/FCS: Fuser Setting HQ: Heat Roller Temp

• 1232-51: Fusing Temperature: FCS: Fuser Setting HQ: Heat Roller Temp: Clear/Special

• 1232-52: Fusing Temperature: FCS: Fuser Setting HQ: Heat Roller Temp: White

• 1232-53: Fusing Temperature: FCS: Fuser Setting HQ: Heat Roller Temp: Metallic

• 1232-71: Fusing Temperature: S: Fuser Setting HQ: Heat Roller Temp: Clear/Special

• 1232-72: Fusing Temperature: S: Fuser Setting HQ: Heat Roller Temp: White

• 1232-73: Fusing Temperature: S: Fuser Setting HQ: Heat Roller Temp: Metallic

2. Print the image and check toner fusion. Has the problem been resolved?

Yes Finished!

No Increase the temperature an additional 5°C.

3. Repeat Step 2.

If the problem persists even if you increase the temperature to 185°C, perform Procedure 2,

"Changing the print speed".

2. Specifying and Checking Paper Settings

16

Procedure 2: Changing the print speed

This will slow down the printing to give the toner more time to fuse. However, because of this,

throughput will be reduced.

1. In [Detailed settings] for the custom paper you are using, select 1231: [Print Speed],

and then decrease the value in the following corresponding settings by one step.

If the present value is [High], select [Middle]. If it is [Middle], select [Low].

2. Is 1231: [Print Speed] set to [Low]?

Yes Go to the next step.

No Proceed to Step 4.

3. In [Detailed settings] for the custom paper you are using, select 1232: [Fusing

Temperature], and then set the value in the following corresponding settings by 10.

4. Print the image and check toner fusion. Has the problem been resolved?

Yes Finished!

No Go to the next step.

5. Is 1231: [Print Speed] set to [Middle]?

6. In [Detailed settings] for the custom paper you are using, select 1232: [Fusing

Temperature], and then set the value in the following corresponding settings by 10.

7. Print the image and check toner fusion. Has the problem been resolved?

Yes Finished!

No Increase the temperature further by 5°C.

If the problem persists even after increasing the value to "200", contact your

service representative.

• If you change the value of 1231: [Print Speed] from [Low] to [High] or to [Middle], in 1232:

[Fusing Temperature], reset the value of [Correct Temp: Pre-Feed] to its default value.

• Changing the fusing temperature or changing the process speed may produce one or more of the

following side effects:

• Paper curling

• Paper misfeeding

• Blisters

• Glossy lines

• Change of gloss

Adjusting Paper Settings

17

• If one or more of the above side effects occurs, adjust the fusing temperature and process speed by

decreasing the fusing temperature and increasing the process speed.

• After performing the solution, it is recommended to perform the color calibration of the external

controller.

• Check the toner fusibility as follows:

• The printed image does not come off.

• The toner does not come off even if it is lightly rubbed by a nail.

• The toner does not come off even if it is rubbed by the cloth for cleaning the contact glass.

• To print on both sides with the special color, change the [FCS] setting.

Improving Transferability

To improve transferability, try the following solution:

Streaks and bands appear. Proceed to "Chapter 5 Image Quality

Problem: Lines/Streaks".

Spots appear. Proceed to "Chapter 6 Image Quality

Problem: Spots".

Uneven thickness, stains, or

spots appear.

Proceed to "Chapter 4 Image Quality

Problem: Full Page".

What is the problem you want to solve

related to image quality?

M0EBIC0117

Improving Paper Deliverability

To improve paper deliverability, see page 203 "Troubles Related to Paper Feeding and Delivery

(Main)".

2. Specifying and Checking Paper Settings

18

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Ricoh Pro C7500 Owner's manual

Ricoh Pro C7500 Owner's manual

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