Utax DF 420 Service Manual
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Utax DF 420 Service Manual

Utax DF 420 Service Manual

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Service
Manual
Document Finisher
DF 420
First Edition
Date: 04-08-2009
3MJSM060

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Summary of Contents for Utax DF 420

  • Page 1 Service Manual Document Finisher DF 420 First Edition Date: 04-08-2009 3MJSM060...
  • Page 2 Service Manual Document Finisher DF 420 First Edition Date: 04-08-2009 3MJSM060...
  • Page 3 CAUTION RISK OF EXPLOSION IF BATTERY IS REPLACED BY AN INCORRECT TYPE. DISPOSE OF USED BATTERIES ACCORDING TO THE INSTRUCTIONS. It may be illegal to dispose of this battery into the municipal waste stream. Check with your local solid waste officials for details in your area for proper disposal. ATTENTION IL Y A UN RISQUE D’EXPLOSION SI LA BATTERIE EST REMPLACEE PAR UN MODELE DE TYPE INCORRECT.
  • Page 4 Revision history Revision Date Replaced pages Remarks...
  • Page 5 This page is intentionally left blank.
  • Page 6 Safety precautions This booklet provides safety warnings and precautions for our service personnel to ensure the safety of their customers, their machines as well as themselves during maintenance activities. Service personnel are advised to read this booklet carefully to familiarize themselves with the warnings and precautions described here before engaging in maintenance activities.
  • Page 7 Safety warnings and precautions Various symbols are used to protect our service personnel and customers from physical danger and to prevent damage to their property. These symbols are described below: DANGER: High risk of serious bodily injury or death may result from insufficient attention to or incorrect compliance with warning messages using this symbol.
  • Page 8 1.Installation Precautions WARNING • Do not use a power supply with a voltage other than that specified. Avoid multiple connections to one outlet: they may cause fire or electric shock. When using an extension cable, always check that it is adequate for the rated current....................•...
  • Page 9 2.Precautions for Maintenance WARNING • Always remove the power plug from the wall outlet before starting machine disassembly....• Always follow the procedures for maintenance described in the service manual and other related brochures............................• Under no circumstances attempt to bypass or disable safety features including safety mechanisms and protective circuits.
  • Page 10 • Do not remove the ozone filter, if any, from the copier except for routine replacement..... • Do not pull on the AC power cord or connector wires on high-voltage components when removing them; always hold the plug itself...................... •...
  • Page 11 This page is intentionally left blank.

  • Page 12: Table Of Contents

    CONTENTS 1-1 Specifications 1-1-1 Specifications............................1-1-1 1-1-2 Parts names............................1-1-2 1-1-3 Machine cross section ..........................1-1-3 1-2 Installation 1-2-1 Installation environment ..........................1-2-1 1-2-2 Unpacking ...............................1-2-2 (1) Unpacking ............................1-2-2 (2) Remove the tapes ..........................1-2-3 1-3 Maintenance Mode 1-3-1 Maintenance mode ..........................1-3-1 (1) Executing a maintenance item ......................1-3-1 (2) Maintenance mode item list.......................1-3-2 (3) Contents of the maintenance mode items..................1-3-3 1-4 Troubleshooting...
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  • Page 14: Specifications

    1-1 Specifications 1-1-1 Specifications Type ..........Built-in Number of trays ......1 tray Paper weight........60 to 105 g/m Maximum sheets (Not stapling) ..A3, B4, Ledger, Legal, Folio, OfficioII, 8K: 250 sheets A4, A4R, B5, Letter, LetterR, 16K: 500 sheets Muximum sheets for stapling ..

  • Page 15: Parts Names

    1-1-2 Parts names Figure 1-1-1 Ejected paper guide extension Finisher tray Ejected paper guide Process table Finisher tray extension JAM release lever Staple 1-1-2...

  • Page 16: Machine Cross Section

    1-1-3 Machine cross section Paper path Figure 1-1-2 Machine cross section Paper conveying section Process table section Eject section 1-1-3...
  • Page 17 This page is intentionally left blank. 1-1-4...

  • Page 18: Installation Environment

    1-2 Installation 1-2-1 Installation environment Installation location (Be based on the machine establishment place.) Avoid direct sunlight or bright lighting. Ensure that the photoconductor will not be exposed to direct sunlight or other strong light when removing paper jams. Avoid locations subject to high temperature and high humidity or low temperature and low humidity; an abrupt change in the environmental temperature;...

  • Page 19: Unpacking

    1-2-2 Unpacking (1) Unpacking Figure 1-2-1 Unpacking Paper conveying unit 10. Sub staple cover 19. Tray left pad Outer case 11. Front eject cover 20. Tray right pad Finisher bottom pad 12. Rear eject cover 21. Plastic sheet Spacer A 13.

  • Page 20: Remove The Tapes

    (2) Remove the tapes Procedure 1. Remove two tapes from the finisher tray. Tape Finisher tray Tape Figure 1-2-2 2. Remove the tape from the paper conveying unit. Tape Paper conveying unit Figure 1-2-3 1-2-3...
  • Page 21 3. Remove the tape from the process table. Process table Tape Figure 1-2-4 1-2-4...

  • Page 22: Maintenance Mode

    1-3 Maintenance Mode 1-3-1 Maintenance mode The machine is equipped with a maintenance function which can be used to maintain and service the machine. (1) Executing a maintenance item Start Enter 10871087 using Maintenance mode is entered. the numeric keys. Enter the maintenance item number using the cursor up/down keys The maintenance item is...

  • Page 23: Maintenance Mode Item List

    (2) Maintenance mode item list Item Initial Section Content of maintenance item setting* General U019 Displaying the ROM version Drive, paper U053 Setting the adjustment of the motor speed 0.3/0.7/-0.5/0.0/-0.1 feed and -0.1/-0.3/0.0/0.0/0.5/0.0 paper convey- ing system Operation U246 Setting the finisher 4/4/4 panel and support...

  • Page 24: Contents Of The Maintenance Mode Items

    (3) Contents of the maintenance mode items Maintenance Description item No. Displaying the ROM version U019 Description Displays the part number of the ROM fitted to each PWB. Purpose To check the part number or to decide, if the newest version of ROM is installed. Method 1.
  • Page 25 Maintenance Description item No. Setting the adjustment of the motor speed U053 Description Performs fine adjustment of the speeds of the motors. Purpose To adjust the speed of the respective motors when the magnification is not correct. Method 1. Press the start key. 2.
  • Page 26 Maintenance Description item No. Setting the finisher U246 Description Provides various settings for the built-in finisher, if furnished. Purpose Adjusts the side registration cursor stop position if paper registration is poor or stapling is made outside the specified area. Setting 1.
  • Page 27 Maintenance Description item No. Checking counts by optional devices U905 Description Displays the counts of DP or finisher. Purpose To check the use of DP and finisher. Method 1. Press the start key. 2. Select the device, the count of which is to be checked using the cursor up/down keys. 3.

  • Page 28: Paper Misfeed Detection

    1-4 Troubleshooting 1-4-1 Paper misfeed detection (1) Paper misfeed indication When paper jams, the machine immediately stops operation and the occurrence of a paper jam is indicated on the opera- tion panel. To remove the jammed paper, lower the process table. To reset the paper misfeed detection, detach and refit the process table to turn the tray open/close switch off and on.

  • Page 29: Paper Misfeeds

    (3) Paper misfeeds Problem Causes/check procedures Corrective measures A piece of paper torn from Check visually and remove it, if any. A paper jam in built- copy paper is caught in finisher is indicated around the paper conveying as soon as the main switch.

  • Page 30: Self-Diagnosis

    1-4-2 Self-diagnosis (1) Self-diagnostic function This unit is equipped with a self-diagnostic function. When a problem is detected, copying is disabled and the problem dis- played as a code consisting of C followed by a number, indicating the nature of the problem. A message is also displayed requesting the user to call for service.
  • Page 31 Remarks Code Contents Causes Check procedures/corrective measures C8190 Built-in finisher trailing edge registra- The trailing edge Reinsert the connector. Also check for conti- tion motor problem registration motor nuity within the connector cable. If none, When the trailing edge registration connector makes remedy or replace the cable.

  • Page 32: Electric Problems

    1-4-3 Electric problems Troubleshooting to each failure must be in the order of the numbered symptoms. Problem Causes Check procedures/corrective measures 1. Poor contact in the con- Reinsert the connector. Also check for continuity within the con- The paper convey- nector terminals.

  • Page 33: Mechanical Problems

    1-4-4 Mechanical problems Problem Causes/check procedures Corrective measures Check if the contact between the feedshift Check and remedy. Paper jams. roller and feedshift pulleys is correct. Check if the contact between the feedshift Check and remedy. roller and press roller is correct. Check if the contact between the eject roller Check and remedy.

  • Page 34: Assembly And Disassembly

    1-5 Assembly and Disassembly 1-5-1 Precautions for assembly and disassembly (1) Precautions Before starting disassembly, press the Power key on the operation panel to off. Make sure that the Power lamp is off before turning off the main power switch. And then unplug the power cable from the wall outlet. Turning off the main power switch before pressing the power key to off may cause damage to the equipped hard disk.

  • Page 35: Adjusting The Positions Of The Front Side Registration Cursor, Rear Side Registration Cursor And Trailing Edge Registration Cursor (Reference)

    (2) Adjusting the positions of the front side registration cursor, rear side registration cursor and trailing edge registration cursor (reference) Perform the following adjustment if paper registration is poor or stapling is made outside the specified area. Procedure Start Staple 5 ±...

  • Page 36: Adjusting The Pressure Of Curl Eliminator Mechanism

    (3) Adjusting the pressure of curl eliminator mechanism Increase the pressure of the curl eliminator mechanism to reduce upward curling of paper stacked on the process table if a paper jam occurs when batch ejection is performed because of strong upward curling. Procedure 1.
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  • Page 38: Construction Of Each Section

    2-1 Mechanical construction 2-1-1 Construction of each section The paper conveying section consists of the components shown in Figure 2-1-1. It switches the path for the paper con- veyed from the machine in sort mode. Also the paper conveying section contains a curl eliminator mechanism, which reduces curling of paper with curl eliminator rollers.

  • Page 39: Paper Conveying Operation In Sort Mode

    (1) Paper conveying operation in sort mode In the sort mode, the feedshift solenoid (FSSOL) turns on and the feedshift guide of the machine operates to switch the paper path to the paper conveying unit. After curling of the conveyed paper is eliminated by the curl eliminator rollers, the paper is conveyed to the process table by the feedshift roller.

  • Page 40: Process Table Section

    2-1-2 Process table section The process table section consists of the components shown in Figure 2-1-4. It stores and evens up the paper conveyed from the paper conveying section and returns the stack of paper to the paper conveying section. Rear side registration cursor Process table...

  • Page 41: Paper Registration On The Process Table

    (1) Paper registration on the process table In sort mode, the front and rear side registration cursors move to the size of the paper used to even up the sides of the stack of paper and the trailing edge registration cursor shifts the paper to the paper conveying section. In staple-sort mode, the front and rear side registration cursors even up the sides of the stack of paper and shift the stack toward the machine front, and then the trailing edge registration cursor shifts the stack to the stapling position.

  • Page 42: Stapler Section

    2-1-3 Stapler section In staple-sort mode, paper stocked on the process table is stapled by the stapler. The stapler motor (STM) drives the stapler cam via the stapler drive gear to staple paper. Stapler motor Stapler drive gear Stapler cam Stapler self-priming sensor Stapler cam...
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  • Page 44: Electrical Parts Layout

    2-2 Electrical Parts Layout 2-2-1 Electrical parts layout (1) Paper conveying section Machine front Machine inside Machine rear Figure 2-2-1 Paper conveying section Paper conveying motor (PCM)..... Drives the paper conveying section. Paper conveying switch (PCSW) ....Detects a paper jam in the finisher. Feedshift solenoid (FSSOL)......

  • Page 45: Process Table Section

    (2) Process table section Machine front Machine inside Machine rear Figure 2-2-2 Process table section Finisher control PWB (FINPWB)....Controls electrical components. Process table sensor (PTS) ......Detects the presence of paper on the process table. Trailing edge registration motor (TERM)..Drives the trailing edge registration cursor. Front side registration motor (FSRM) ..

  • Page 46: Stapler Section

    (3) Stapler section Machine front Machine inside Machine rear Figure 2-2-3 Stapler section Stapler empty sensor (STES) ...... Detects the presence of staples. Staple cartridge sensor (STCS) ....Detects the presence of the staple cartridge. Stapler home position sensor (STHPS) ..Detects the stapler in the home position. Stapler self-priming sensor (STSPS) ...
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  • Page 48: Finisher Control Pwb

    2-3 Operation of the PWBs 2-3-1 Finisher control PWB FINPWB Paper conveying unit FSSOL ACT/RET FSSOL PUSOL PUSOL Driver circuit DF SEL DF RDY PCSW PCSW Machine Stepping motor driver circuit TOCSW SCLK TOCSW STES, STCS, STHPS, STSPS Sensors Serial communication Motor driver circuit...
  • Page 49 Figure 2-3-2 Finisher control PWB silk-screen diagram 2-3-2...
  • Page 50 Connector Pin No. Signal Voltage Description 24 V DC 24 V DC power input from EPWB Connected 24 V DC 24 V DC power input from EPWB to the PGND Ground machine PGND Ground 5 V DC 5 V DC power input from EPWB SGND Ground DF SEL...
  • Page 51 Connector Pin No. Signal Voltage Description TRAY 5V 5 V DC 5 V DC power output to PTS Connected TRAY 0/5 V DC PTS: On/Off to process TRAY GND Ground table sen- FJHP 5V 5 V DC 5 V DC power output to SRFHPS sor and side registration FJ HP...

  • Page 52: Maintenance Parts List

    2-4 Appendixes Maintenance parts list Maintenance part name Alternative Fig. Ref. Part No. part No. Name used in service manual Name used in parts list Process table Upper curl eliminator roller UPPER ROLLER DECURLER 3HP08110 Lower curl eliminator roller ROLLER DECURLER 303HP08101 3HP08101 Eject roller...

  • Page 53: Wiring Diagram

    Wiring diagram 2-4-2...

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