Ricoh Pro C7200x Operating Instructions Manual
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Ricoh Pro C7200x Operating Instructions Manual

Advanced settings for custom paper adjustment
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Operating Instructions
Advanced Settings for Custom Paper Adjustment
For safe and correct use, be sure to read Safety Information before using
the machine.

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Summary of Contents for Ricoh Pro C7200x

  • Page 1 Operating Instructions Advanced Settings for Custom Paper Adjustment For safe and correct use, be sure to read Safety Information before using the machine.

  • Page 3: Table Of Contents

    TABLE OF CONTENTS 1. Introduction Basic Procedure..............................3 Advanced Settings..............................4 2. Mechanism Xerographic process - Overview........................5 Xerographic Process-Laser Exposure........................7 Laser Unit (Exposure)............................. 7 Xerographic Process – Development........................8 Development..............................8 Xerographic Process – Drum-to-Belt Transfer....................10 Drum-to-Belt Transfer...........................10 Xerographic Process – Belt-to-Paper Transfer....................11 Belt-to-Paper Transfer..........................
  • Page 4 Paper Transfer.............................. 30 Fusing................................32 Paper Feed/Delivery from Mainframe Trays....................39 2-Tray LCIT..............................39 3-Tray LCIT..............................43 Decurler Unit..............................44 Mainframe Trays............................44...

  • Page 5: Introduction

    1. Introduction This chapter provides an overview of the Media Library. Basic Procedure This machine is capable of printing on a wide variety of media using the latest technologies in digital printing such as the AC transfer and elastic fusing belt. Also, the introduction of the Clear/White toner - available in the 5-color model - is capable of adding further value to print products.

  • Page 6: Advanced Settings

    1. Introduction Advanced Settings As described in the previous slide, printing from the Media Library is possible with a simple procedure, however, precise adjustments (such as the transfer and fusing conditions) may be required depending upon the media attributes, which differ by each and every media. Such precise adjustments can be made from [Tray Paper Settings] [Advanced Settings].

  • Page 7: Mechanism

    2. Mechanism This chapter provides explanation on the basic Xerographic process of the engine by referring to the items of the Advanced Settings. Xerographic process - Overview DZH002 1. OPC drum 2. Charger roller 3. Laser unit 4. Development roller 5.
  • Page 8 2. Mechanism Drum-to-belt transfer …… Toner images created on each OPC drum [1] are transferred sequentially to the ITB [6]. Belt-to-paper transfer …… Toner image on the ITB [6] is transferred onto the paper when the paper passes through the PTR [7]. •...

  • Page 9: Xerographic Process-Laser Exposure

    Xerographic Process-Laser Exposure Xerographic Process-Laser Exposure Laser Unit (Exposure) The laser unit is equipped with the Vertical Cavity Surface Emitting Laser (VCSEL) technology. 40 laser beams are emitted to produce 2400dpi×4800dpi. Laser beams are reflected on the polygon mirror and lenses to create a latent image on each of the photoconductive drums by imparting static electricity on the surface of the drum.

  • Page 10: Xerographic Process - Development

    2. Mechanism Xerographic Process – Development Development The development system employs the dual-component development method. The developer is pre-mixed to prevent image quality degradation caused by deterioration of the developer that occurs over time. Electrostatic latent image areas of the drum attract negatively charged toner particles from the development roller [4].
  • Page 11 Xerographic Process – Development Related Advanced Settings page 29 "Maximum Image Density"...

  • Page 12: Xerographic Process - Drum-To-Belt Transfer

    2. Mechanism Xerographic Process – Drum-to-Belt Transfer Drum-to-Belt Transfer To enable printing in all five toner colors as well as printing using only special color, the mechanism to contact/separate the ITB and ITB rollers was modified in the drum-to-belt transfer process for the machine.

  • Page 13: Xerographic Process - Belt-To-Paper Transfer

    Xerographic Process – Belt-to-Paper Transfer Xerographic Process – Belt-to-Paper Transfer Belt-to-Paper Transfer Applied voltage The AC transfer technology is used for the belt-to-paper transfer, to support printing on textured media. Negatively charged toner image (-) on the ITB [6] is transferred to the paper by applying a negative bias (-) to the paper transfer bias roller [7].
  • Page 14 2. Mechanism Textured paper mode DZH009 1. ITB 2. Textured paper 3. Toner is partially transferred. 4. Toner transferred to the paper returns to the belt and combines with toner remaining on the belt. 5. Toner is transferred to the indentations on the surface of the paper. DZH010 1.
  • Page 15 Xerographic Process – Belt-to-Paper Transfer Leading/Trailing edge correction To prevent image quality problems caused by the unstable condition of the paper when it enters the nip of the PTR, the belt-to-paper transfer bias is adjusted for the leading/trailing edges. The following are the three bias correction settings that adjust the bias level and duration. •...

  • Page 16: Ptr Rotation Speed

    2. Mechanism DZH008 Related Advanced Settings page 31 "Paper transfer gap" PTR Rotation Speed The PTR [9] has the function to deliver the paper from the paper transfer timing roller. Since the paper transport speed is controlled by the PTR, if the PTR rotation speed is slower than the target the image will shrink, if faster the target the image will stretch.
  • Page 17 Xerographic Process – Belt-to-Paper Transfer DZH032 Feeding black or metallic media without selecting the correct media from the library will stop the machine. This is because the constant voltage control used for separating the media from the ITB causes a ground fault due to the conductive carbon substance contained in the media.

  • Page 18: Xerographic Process - Fusing

    2. Mechanism Xerographic Process - Fusing Fusing Unit The fusing belt has a thick elastic layer, as with the previous model, to allow the belt to reach farther into the surface indentations of textured media. Fusing belt Conventional fusing belt Base layer Elastic layer Surface layer...

  • Page 19: Fusing Nip Width Adjustment

    Xerographic Process - Fusing Printing starts when the fusing belt temperature reaches the prescribed temperature range against the target. Image quality issues originating in the fusing unit, for example, residual gloss images, river marks, can be prevented by adjusting the target fusing temperature. Related Advanced Settings page 32 "Fusing temperature"...

  • Page 20: Fusing Belt Smoothing Roller

    2. Mechanism The interval between each cleaning operation can be adjusted to any of 4 levels. DZH030 Related Advanced Settings page 35 "Fusing cleaning" Fusing Belt Smoothing Roller Printing continuously on a particular paper size causes the paper edges to nick the fusing belt, and when switched to a job printed on a larger size, the nicked fusing belt produces unwanted gloss streaks on the prints.
  • Page 21 Xerographic Process - Fusing DZH033 Related Advanced Settings page 37 "Smoothing roller rotation interval"...

  • Page 22: Paper Delivery

    Skew detection & main scan registration A Ricoh original technology is applied to separately control skew correction and main scan registration, to achieve high accuracy in front-to-back registration. 1. Skew is corrected when the leading edge hits the skew correction gate.
  • Page 23 Paper Delivery Related Advanced Settings page 45 "Skew detection" Leading edge detection mechanism in more detail When the paper passes through the registration gate, the CIS emits light and reads the amount of light reflected, to detect the leading edge. The sensor reading is 0V when there is no reflection (no paper detected) whereas a certain voltage is detected when there is reflection.
  • Page 24 2. Mechanism Sub scan registration mechanism After the main scan registration is corrected, the sheet passes through the transfer timing roller [5] and then the transfer timing sensor [6] detects the leading edge. Rotation speed of the transfer timing roller [5] is adjusted according to the timing the leading edge is detected, to deliver the paper for the belt-to-paper transfer process at the perfect timing.

  • Page 25: Decurl Unit

    Paper Delivery DZH018 Related Advanced Settings page 46 "Transfer timing roller feed speed" / page 47 "Fusing belt feed speed" / page 48 "Cooling roller after fusing/Paper output: diversion roller/Paper output roller/Switchback: entrance roller/Switchback: exit roller" / page 44 "Decurler feed speed" Decurl Unit De-curling mechanism Paper curls can be corrected by installing the optional decurl unit.

  • Page 26: 3-Tray Lcit

    2. Mechanism The speed in which the paper passes through the decurl unit can be adjusted. If the speed is set too fast, toner may adhere to the edge of the paper, and if set too slow, wrinkles/creases may occur. Set to an optimum speed according to the stock.
  • Page 27 Paper Delivery • Separation fan: Blows air in between the top most and second sheet for separation. • Side fan: Blows air from the right/left sides to fan the paper. • Suction fan: Sucks air to adhere the sheet to the suction belt for feeding. DZH022 Each fan level is made adjustable to prevent non-feeds and double-feeds in 1301: [2-Tray LCIT: Paper Feed Mode].
  • Page 28 2. Mechanism 1. Blower fan 2. Stack upper limit: High 3. Stack upper limit: Low 4. Updraft fan 5. Updraft fan shutter 6. Blower fan shutter 7. Vacuum fan 8. Feed belt 9. Side fan...

  • Page 29: Details Of Advanced Settings

    3. Details of Advanced Settings This chapter explains the functions of the Advanced Settings and the related image quality problems that can be prevented/improved by adjusting these settings. For detailed procedure, see the Troubleshooting manual. Overview Print Mode Image quality is adjusted in balance with productivity according to the print mode (BW/FC/FCS/S), which differ in the maximum toner amount, i.e.

  • Page 30: Registration

    3. Details of Advanced Settings Registration Image Position/Magnification 1101 [Image Position] 1102 [Auto Adjust Image Position] 1103 [Image Position Feedback Correction] 1104 [Image Position Feedback Correction: Gap] Function Adjusts the position and magnification of the image to be printed on the paper. When to use To align the images printed on the front and back sides of the paper.

  • Page 31: Image Quality

    Image Quality Image Quality Maximum Image Density 1201 [Max Image Density] Function Adjusts the amount of toner developed on the drum. When to use To adjust the maximum toner density for the media in use. Note the possible side effects, such as worm track and toner scattering, if set too high. Related Troubleshooting •...

  • Page 32: Paper Transfer

    3. Details of Advanced Settings Paper Transfer Paper transfer current 1214 [Paper Transfer Output] Function Adjusts the amount of bias applied for the belt-to-paper transfer process. Effective for: • White spots/Toner blasting that may occur in low humidity/temp environment • Mottling effect Related Troubleshooting •...
  • Page 33 Image Quality When to use If poor transfer occurs when using textured paper or plain paper whose surface is not smooth, the problem may be solved by setting this to [On] and adjusting the bias control. Related Troubleshooting • Uneven Density (Textured Paper) •...

  • Page 34: Fusing

    3. Details of Advanced Settings Related Troubleshooting • Horizontal Black Streaks Image Edge • Patch Unprinted Image • Fainter Leading Edge • Fainter Trailing Edge For detailed procedure, see the Troubleshooting manual. Fusing Print speed 1231 [Print Speed] Function Set the print speed. When to use If a fusing-related problem occurs, it may be solved by decreasing the line speed (if it can be decreased from [High] or [Middle]).
  • Page 35 Image Quality When to use • Image quality problems caused by insufficient fusing • Abnormal images, for example, glossy residual image, gloss streaks, uneven gloss, fusing jam (J033) Related Troubleshooting • Vertical White Streaks (2) • Vertical Glossy Line: Uneven Glossiness due to Wax Stain •...
  • Page 36 3. Details of Advanced Settings • Milky Transparency • J033/J034/J083 For detailed procedure, see the Troubleshooting manual. Fusing pressure temperature 1233 [Fusing Pressure Temperature] Function Adjust pressure roller temperature. When to use If an uneven luster appears, adjust the fusing pressure temperature. Related Troubleshooting •...
  • Page 37 Image Quality If the waiting time at the start of paper transfer is long, it may be solved by increasing the fusing temperature range. Related Troubleshooting • None For detailed procedure, see the Troubleshooting manual. Fusing pressure roller cooling 1236 [Fusing Pressure Roller Cooling] Function Under the following conditions, set the cooling fan level of pressure roller.
  • Page 38 3. Details of Advanced Settings When to use Setting to a shorter interval is effective for black (color) spots that appear on prints, which is caused by toner particles slipping through the web. Related Troubleshooting • Black (color) Spots (2) For detailed procedure, see the Troubleshooting manual.
  • Page 39 Image Quality Fusing nip width adjustment: envelope 1240 [Fusing Nip Width: Paper Type] 02: [Envelope] 1241 [Fusing Nip Width Adjustment] 02: [Envelope] Function Specifies the fusing nip width specifically for envelope printing. When to use Effective for wrinkles, worm track that occur with envelope. Related Troubleshooting •...
  • Page 40 3. Details of Advanced Settings Fusing pressure roller on before fusing 1244 [Fusing Pressure Roller On Before Fusing] Function Turn on or off pressurization when the feed speed of the fusing belt is adjusted before paper is fed. When to use Use this if the fusing nip width is set to "1"...

  • Page 41: Paper Feed/Delivery From Mainframe Trays

    Paper Feed/Delivery from Mainframe Trays Paper Feed/Delivery from Mainframe Trays 2-Tray LCIT 2-Tray LCIT: paper feed mode 1301 [2-Tray LCIT: Paper Feed Mode] Function Adjusts the behavior of the fan. Setting option Behavior [Prevent Double Feed Amount of air blown from the float fan and side fans is reduced 20% (Weakest Blow)] against the standard value.
  • Page 42 3. Details of Advanced Settings When to use If double-feeds do not improve by setting 1301: [2-Tray LCIT: Paper Feed Mode] to [Prevent Double Feed (Weakest Blow)], decrease the airflow in [Side Fan Level] in steps of 10%. Face curl Back curl Sheets float up and tend to result in double- Sheets get pressed down and tend to result in...
  • Page 43 Paper Feed/Delivery from Mainframe Trays Face curl Back curl Sheets float up and tend to result in double- Sheets get pressed down and tend to result in feeds. non-feeds. Related Troubleshooting • Double Feeding For detailed procedure, see the Troubleshooting manual. 2-Tray LCIT: side fan level 1302 [2-Tray LCIT: Fan/Shutter] [Side Fan Level]...
  • Page 44 3. Details of Advanced Settings Function Adjusts the amount of air sucked against the paper feed belt. * If non-feeds occur due to low air suction power, increase the power. When to use If double-feeds do not improve by setting 1301: [2-Tray LCIT: Paper Feed Mode] to [Prevent Double Feed (Weakest Blow)], increase the airflow in steps of 10%.

  • Page 45: 3-Tray Lcit

    Paper Feed/Delivery from Mainframe Trays Function Turn on or off the return fan shutter in 2-Tray LCIT. When to use Do not use this. Related Troubleshooting • None 2-Tray LCIT: vacuum fan shutter 1302 [2-Tray LCIT: Fan/Shutter] 34: [Vacuum Fan Shutter] Function Turn on or off the vacuum fan shutter in 2-Tray LCIT.

  • Page 46: Decurler Unit

    3. Details of Advanced Settings Function • 1311-01: Sets the fans in the 3-tray LCIT On or OFF. • 1311-02: Adjusts the amount of air blown from the fans, if 1311-01 is set to On. • 1312: Sets pickup assist On or Off. When to use Effective for jams, double-feeds and non-feeds.
  • Page 47 Paper Feed/Delivery from Mainframe Trays Function Specifies whether or not to stop printing, if registration in sub scan direction (along feed direction) exceeds the adjustable range (+/- 3mm). When to use Set to Off, if jam J080 occurs frequently. If set to Off, printing will continue with the registration in feed direction corrected up to 3mm, but no more than 3mm.
  • Page 48 3. Details of Advanced Settings Related Troubleshooting • Wrong Detection of Double Feeding • Creases, Wavy Streaks, or Fusing Error For detailed procedure, see the Troubleshooting manual. Paper edge detection 1331 [Jam Detection] 06: [Setting] Function Sets the duration the light is emitted from the CIS (contact image sensor) to detect the paper edge for color media.
  • Page 49 Paper Feed/Delivery from Mainframe Trays Function Adjusts the transfer timing roller speed. When to use To troubleshoot problems caused by difference in the rotation speed against the PTR. Related Troubleshooting • Wrong Detection of Skew Horizontal Black Streaks (Image Edge) •...
  • Page 50 3. Details of Advanced Settings Related Troubleshooting • Vertical Black Steaks For detailed procedure, see the Troubleshooting manual. Cooling roller after fusing/Paper output: diversion roller/Paper output roller/ Switchback: entrance roller/Switchback: exit roller 1341 [Motor Speed] [Speed Adjustment] 05: [Cooling Roller After Fusing] 1341 [Motor Speed] [Speed Adjustment] 06: [Paper Output: Diversion Roller]...
  • Page 52 EN GB EN US EN AU D0AK-7440 © 2018...

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