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Ricoh VT1800 Service Manual

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II
N810-
SERVICE MANUAL

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  • Page 1 N810- SERVICE MANUAL...
  • Page 2 INTRODUCTION This manual explains only the features of the N810-II (C225 model) that are different compared with the N810 (C217 model). So, please refer to the N810 service manual for the sections which are not described in this manual.

  • Page 3: Overall Machine Information

    SECTION 1 OVERALL MACHINE INFORMATION...

  • Page 4: Specifications

    5 September 1995 SPECIFICATIONS 1. SPECIFICATIONS Configuration: Desk top Master Making Process: Digital Printing Process: Full automatic one-drum stencil system Image Mode: Line/Photo Original Type: Sheet ∼ 104.7 g/m (17.0 lb ∼ 27.9 lb) Original Weight: 64 g/m Original Size: Max: 216 mm x 356 mm (8 "...
  • Page 5 SPECIFICATIONS 5 September 1995 1 mm ± 1 mm (0.04" ± 0.04") Trailing Edge Margin: Paper Feed Table Capacity: 500 sheets (80 g/m , 20.0 lb) Paper Delivery Table Capacity: 500 sheets (80 g/m , 20.0 lb) Master Eject Box Capacity: More than 25 masters ADF Original Capacity: 6 sheets or a 0.6 mm height...
  • Page 6 5 September 1995 SPECIFICATIONS Optional Equipment: Key Counter, Tape Dispenser Consumables: Name Size Remarks Thermal master Length: 125 m (410 ft)/roll 260 masters can be made per roll Width: 240 mm (9.5") with a Legal Drum. 304 masters can be made per roll with an A4 Drum.
  • Page 7 ESSENTIAL DIFFERENCES BETWEEN THE C217 AND THE C225 5 September 1995 2. ESSENTIAL DIFFERENCES BETWEEN THE C217 AND THE C225 Item Remarks Paper Delivery System The paper delivery system has been changed from a delivery roller system to a vacuum transport system. Due to this modification, 5 mm side margins are not required for originals.
  • Page 8 5 September 1995 ESSENTIAL DIFFERENCES BETWEEN THE C217 AND THE C225 Item Remarks Exposure Glass Bracket To prevent the scanned original from being pushed out by the next original, the shape of the exposure glass bracket has been changed as shown below. H225V501.wmf Original Feed Spring To ensure proper feeding of thin paper, the angle of the...

  • Page 9: Printing Process

    PRINTING PROCESS 5 September 1995 3. PRINTING PROCESS C225V502.img 1. Master Ejecting: The machine ejects the used master wrapped around the drum into the master eject box. 2. Scanning: The machine scans the original using the CCD, through the mirror and the lens, while feeding the original.

  • Page 10: Mechanical Component Layout

    5 September 1995 MECHANICAL COMPONENT LAYOUT 4. MECHANICAL COMPONENT LAYOUT 7 8 9 10 C225V502-2.img 1. Mirror 16. Friction Pad 2. Original Feed Roller 17. 2nd Feed Roller 3. Original Pressure Plate 18. Doctor Roller 4. Exposure Lamp 19. Press Roller 5.

  • Page 11: Drive Layout

    DRIVE LAYOUT 5 September 1995 5. DRIVE LAYOUT C225V503.img 1. Pump Drive Gear 10. Master Eject Motor 2. Ink Supply Motor 11. Master Clamper Motor 3. Platen Roller Gear 12. Master Clamper Drive Gear 4. Original Feed Motor 13. Transport Unit Drive Pulley 5.

  • Page 12: Electrical Component Description

    5 September 1995 ELECTRICAL COMPONENT DESCRIPTION 6. ELECTRICAL COMPONENT DESCRIPTION Index No. Name Function Motors Master Feed Feeds the master to the drum. Master Eject Sends the used master into the master eject box. Main Drives the paper feed, drum, printing and paper delivery unit components.
  • Page 13 ELECTRICAL COMPONENT DESCRIPTION 5 September 1995 Index No. Name Function Scanner Unit Open Checks if the scanner unit is open. Delivery Cover Open Checks if the delivery cover is open. Main Turns the power on or off. Master Eject Box Checks if the master eject box is set correctly.

  • Page 14: Detailed Section Descriptions

    SECTION 2 DETAILED SECTION DESCRIPTIONS...

  • Page 15: Paper Feed

    5 September 1995 PAPER FEED 1. PAPER FEED 1.1 PAPER TABLE C225D506.wmf The paper table side fences [A] should be adjusted depending on the paper size. The left and right side fences move together because of the rack and pinion [B], to ensure correct paper positioning on the tray. If the dial [C] is turned, the side fences move together, changing the paper position on the table.

  • Page 16: Paper Delivery Section

    PAPER DELIVERY SECTION 5 September 1995 2. PAPER DELIVERY SECTION 2.1 OVERALL C225D505.img The exit pawl [A] and the air knife [B] separate the paper from the drum. The paper is transported to the delivery table by the transport unit [C]. There is a reflective photosensor [D] to detect paper jams.

  • Page 17: Vacuum Unit Drive Mechanism

    5 September 1995 PAPER DELIVERY SECTION 2.2 VACUUM UNIT DRIVE MECHANISM C225D507.wmf The vacuum fan [A] holds the paper against the transport belts [B] to deliver the paper to the delivery table. The transport belts are driven by the main motor through gears [C].

  • Page 18: Image Processing

    IMAGE PROCESSING 5 September 1995 3. IMAGE PROCESSING 3.1 IMAGE DENSITY SETTING The A/D conversion parameters (refer to page 2-43 of the C217 model service manual) and thermal head energy change depending on the image density selected on the operation panel. The table below shows the relationships between the image modes, parameters, and the thermal head energy.

  • Page 19: Master Plotting And Printing Area

    5 September 1995 MASTER PLOTTING AND PRINTING AREA 4. MASTER PLOTTING AND PRINTING AREA 1. Length (Legal Drum) Original Master Screen Paper (Shift : 0 mm) Paper (Shift : 15 mm) Paper (Shift : –15 mm) C225D502.wmf...
  • Page 20 MASTER PLOTTING AND PRINTING AREA 5 September 1995 (A4 Drum) Original Master Screen Paper (Shift : 0 mm) Paper (Shift : 15 mm) Paper (Shift : –15 mm) C225D503.wmf...
  • Page 21 5 September 1995 MASTER PLOTTING AND PRINTING AREA 2. Width (Legal and A4 Drum) Original Master Screen Paper C225D504.wmf...

  • Page 22: Master Eject (Timing Chart 1)

    TIMING CHART 5 September 1995 5. TIMING CHART TIMING CHART 3 (Master Cut/Trial Print) is identical to that of C217 model. 5.1 MASTER EJECT (TIMING CHART 1) C225D500.wmf...

  • Page 23: Original Feed/Plotting (Timing Chart 2)

    5 September 1995 TIMING CHART 5.2 ORIGINAL FEED/PLOTTING (TIMING CHART 2) C225D501.wmf...

  • Page 24: Installation

    SECTION 3 INSTALLATION...

  • Page 25: Installation Requirements

    5 September 1995 INSTALLATION REQUIREMENTS 1. INSTALLATION REQUIREMENTS The installation location should be carefully chosen because the environmental conditions greatly affect the performance of the machine. 1.1 OPTIMUM ENVIRONMENTAL CONDITIONS C225I500.img C225I501.img Temperature — 10 to 30°C On a strong and level base. (50 to 86°F) Humidity —...

  • Page 26: Environments To Avoid

    INSTALLATION REQUIREMENTS 5 September 1995 1.2 ENVIRONMENTS TO AVOID C225I502.img C225I503.img Locations exposed to direct Dusty areas. sunlight or strong light (more than 1,500 lux). C225I505.img C225I504.img Areas with corrosive gases. Locations directly exposed to cool air from an air conditioner or reflected heat from a space heater.

  • Page 27: Power Connection

    5 September 1995 INSTALLATION REQUIREMENTS 1.3 POWER CONNECTION C225I506.img C225I507.img Securely connect the power cord Voltage must not fluctuate more to a power source. than 10%. Make sure that the wall outlet is near the machine and easily accessible. Make sure the plug is firmly inserted in the outlet.

  • Page 28: Access To The Machine

    INSTALLATION REQUIREMENTS 5 September 1995 1.4 ACCESS TO THE MACHINE Place the machine near a power source, providing clearance as shown below. 10 cm (4.0") Paper Paper 61 cm Feed Delivery (24.0") Table Table More than 70 cm (27.6") More than More than 60 cm 105 cm (41.3")

  • Page 29: Installation Procedure

    1. Make sure that you have all the accessories listed below. (1) Master Spool ........... 2 (2) Paper Feed Side Pad........2 (3) Operating Instructions - English ...... 1 (4) NECR (Ricoh version only) ......1 (5) Brand Stickers (OEM version only) .......... 1 set (6) Model Name Plates...
  • Page 30 INSTALLATION PROCEDURE 5 September 1995 C225I511.wmf 2. Mount the machine on a strong and level base. NOTE: Use a sturdy desk, or something similar. The machine must be level within 5 mm (0.2") both front to rear and left to right. 3.
  • Page 31 5 September 1995 INSTALLATION PROCEDURE 7. Load paper as follows: a. Open the paper feed table. b. Press down the feed roller pressure lever. C225I512.img c. Place the paper on the paper feed table. C225I513.img d. Adjust the paper feed side plates to match the paper size.
  • Page 32 INSTALLATION PROCEDURE 5 September 1995 8. Open the paper delivery table. 9. Move the paper delivery end and side plates to match the print paper size. C225I516.img C225I517.img 10. Install the master roll as follows: a. Insert both spools into the new master roll.
  • Page 33 5 September 1995 INSTALLATION PROCEDURE e. Insert the leading edge of the master roll under the platen roller. Then rotate the master roll clockwise a little. f. Return the pressure release lever to its original position. g. Turn on the main switch. C225I519.img h.
  • Page 34 INSTALLATION PROCEDURE 5 September 1995 11. Install the ink cartridge as follows: a. Open the ink cover. b. Press down the release lever (green tab [A]). Then pull out the ink cartridge holder. c. Open the ink cap and install the ink cartridge as shown in the illustration.
  • Page 35 5 September 1995 INSTALLATION PROCEDURE 30 mm C225I525.img BRAND DECAL AND NAME PLATE INSTRUCTIONS This procedure is for the OEM version machines only. 1. Peel off the backing film of the brand decal (accessory). 2. Adhere the brand decal to the operation panel as shown. 3.
  • Page 36 SECTION 4 SERVICE TABLES...

  • Page 37: Maintenance Table

    5 September 1995 MAINTENANCE TABLE 1. MAINTENANCE TABLE The following items should be maintained periodically. There are two sets of intervals - one based on time and the other based on print count. For maintenance items with entries in both of them, use whichever comes first. C: Clean R: Replace L: Lubricate A: Adjust...
  • Page 38 MAINTENANCE TABLE 5 September 1995 Interval Time Print Counter NOTE Item 6M 1Y 2Y 3Y 300K 600K 1M 1.2M 2M Others Timing Belt Tension Press Roller Lock Lever Position...

  • Page 39: Lubrication Points

    5 September 1995 LUBRICATION POINTS 2. LUBRICATION POINTS 2.1 FEED ROLLER BUSHING Lubricant: Motor Oil C225M500.img...

  • Page 40: Transport Unit Drive Gear Bearing

    LUBRICATION POINTS 5 September 1995 2.2 TRANSPORT UNIT DRIVE GEAR BEARING Lubricant: Motor Oil C225M504.wmf 2.3 TRANSPORT UNIT GEARS Lubricant: Grease (Albania #2) C225M505.wmf...

  • Page 41: Feed Roller Drive Gears

    5 September 1995 LUBRICATION POINTS 2.4 FEED ROLLER DRIVE GEARS Lubricant: Grease (Albania #2) C225M501.img 2.5 DRUM DRIVE GEARS AND CAM Lubricant: Grease (Albania #2) C225M502.img...

  • Page 42: Drum Flange Bushing

    LUBRICATION POINTS 5 September 1995 2.6 DRUM FLANGE BUSHING Lubricant: Motor Oil C225M503.img...

  • Page 43: Special Operation Modes

    5 September 1995 SPECIAL OPERATION MODES 3. SPECIAL OPERATION MODES 3.1 SKIP FEED MODE Customers can select the number of rotations of the drum for one print by the following key operation. • While pressing the Clear key and Stop key, select the number of rotations of the drum while one sheet of paper is fed using the Number keys (1 to 9 can be selected.).

  • Page 44: Input/Output Check Mode

    INPUT/OUTPUT CHECK MODE 5 September 1995 4. INPUT/OUTPUT CHECK MODE The electrical components can be checked with this program. The input check mode can check if the sensors or switches function correctly. The output check mode can manually activate the electrical devices, such as motors and solenoids.
  • Page 45 5 September 1995 INPUT/OUTPUT CHECK MODE 4.3 INPUT CHECK MODE By entering a number listed below after accessing the input check mode, the input level from each electrical device can be checked. Depending on the electrical device’s condition, the beeper sounds and the machine status indicators light.
  • Page 46 INPUT/OUTPUT CHECK MODE 5 September 1995 4.4 OUTPUT CHECK MODE You can turn on each electrical device listed below individually. The procedure is as follows: 1. Select the output check mode. 2. Enter the number of the device which you would like to turn on. 3.
  • Page 47 5 September 1995 INPUT/OUTPUT CHECK MODE Device/Function Note Pressure Plate Motor * The motor moves pressure plate towards to the (To Home Position) home position. The motor stops when the pressure plate H.P. sensor is actuated. Pressure Plate Motor * The motor moves the pressure plate towards to the (To the Compression Position) master compression position.

  • Page 48: Service Tables

    SERVICE TABLES 5 September 1995 5. SERVICE TABLES 5.1 TEST POINT TABLE Main PCB Usage TP101 –12 V TP102 Ink Level (Standard Pulse) TP103 Ink Level (Detection Pulse) TP104 GND–b TP105 +12 V TP106 +24 V TP107 4MHz Clock TP108 +38 V TP109 +5 V...

  • Page 49: Dip Switch Table

    5 September 1995 SERVICE TABLES 5.3 DIP SWITCH TABLE Main PCB DPS 101 Outputs a Test Pattern Dither Matrix (Screw Pattern) Dither Matrix (Bayer Pattern) Dither Matrix (8 x 8 Pattern) Dither Matrix (6 x 6 Pattern) Dither Matrix (4 x 4 Pattern) Normal Edge Emphasis in Photo Mode Normal...

  • Page 50: Led Table

    SERVICE TABLES 5 September 1995 DPS 103 Vertical Magnification +1.75% +1.25 +0.75 0 (Standard) –0.75 –1.25 –1.75 –2.25 DPS103 Description Trailing Edge Erase Margin Adjustment +1mm +2 mm +3 mm –1mm DPS 103 Normal Enable Key Counter Operation LG version A4 version Normal Print and master counters do not change.

This manual is also suitable for:

Gestetner 5304Rexrotary 1222Nashuatec cp304Abdick 6130N810-iiC225

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