Utax PF 420 Service Manual
  1. Manuals
  2. Brands
  3. Utax Manuals
  4. Printer Accessories
  5. PF 420
  6. Service manual
Utax PF 420 Service Manual

Utax PF 420 Service Manual

Utax pf 420 paper feeder service manual
Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
Service
Manual
Paper Feeder
PF 420
First Edition
Date: 04-08-2009
3MHSM060

Advertisement

Table of Contents
loading

Related Manuals for Utax PF 420

Summary of Contents for Utax PF 420

  • Page 1 Service Manual Paper Feeder PF 420 First Edition Date: 04-08-2009 3MHSM060...
  • Page 2 Service Manual Paper Feeder PF 420 First Edition Date: 04-08-2009 3MHSM060...
  • 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

    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: Installation Precautions

    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 and spacer ......................1-2-3 1-2-3 Installing the cassette heater (option) .....................1-2-4 1-3 Maintenance Mode 1-3-1 Maintenance mode (operation panel is a 7-segment type)..............1-3-1 (1) Executing a maintenance item ......................1-3-1 (2) Maintenance mode item list.......................1-3-2...
  • Page 13 2-4 Appendixes List of maintenance parts........................2-4-1 Periodic maintenance procedures ......................2-4-1 Wiring diagram............................2-4-2...

  • Page 14: Specifications

    1-1 Specifications 1-1-1 Specifications Paper supply method...... Friction retard method Paper weight........64 to 105 g/m Paper types........Standard, recycled Paper size........A3, B4, A4, A4R, B5, B5R, A5R, Folio, Ledger, Legal, OficioII, Letter, LetterR, StatementR, 8K, 16K Paper capacity ........ 300 sheets (80 g/m Power source........

  • Page 15: Parts Names

    1-1-2 Parts names Figure 1-1-1 Cassette Cassette left cover Paper width guides Paper length guide 1-1-2...

  • Page 16: Machine Cross Section

    1-1-3 Machine cross section Paper path Figure 1-1-2 Machine cross 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 feeder 10. Cover labels Outer case 11. Plastic bag Bottom left pad 12. Screw M3 x 8 Bottom right pad 13. Screw M3 x 12 Top left pad 14. Connector cover Top right pad 15.

  • Page 20: Remove The Tapes And Spacer

    (2) Remove the tapes and spacer Procedure Spacer 1. Remove two tapes. 2. Remove the spacer. Tape Tape Figure 1-2-2 3. Pull the cassette out and remove the tape. 4. Push the cassette back in. Tape Figure 1-2-3 1-2-3...

  • Page 21: Installing The Cassette Heater (Option)

    1-2-3 Installing the cassette heater (option) Installing the cassette heater requires the following component: Cassette heater (P/N 303MH94060): for 220 to 240 V specifications only Cassette heater (P/N 303MH94050): for 120 V specifications One (1) M3 x 8 P tight screw (P/N 7BB202308H) Procedure 1.
  • Page 22 6. Connect the connector of the cassette heater cable to the connector of the machine. 7. Refit all the removed parts. Connector Cassette heater cable Figure 1-2-6 1-2-5...
  • Page 23 This page is intentionally left blank. 1-2-6...

  • Page 24: Maintenance Mode

    1-3 Maintenance Mode 1-3-1 Maintenance mode (operation panel is a 7-segment type) 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.

  • Page 25: 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 U030 Checking motor operation feed and U031 Checking switches for paper conveying paper convey- U032 Checking clutch operation ing system U034 Adjusting the print start timing Adjusting the leading edge registration...

  • Page 26: Contents Of Maintenance Mode Items

    (3) Contents of maintenance mode items Maintenance Description item No. Displaying the ROM version U019 Description Displays the part number of the ROM fitted to each board. Purpose To check the part number or to decide if the ROM version is new from the last digit of the number. Method 1.
  • Page 27 Maintenance Description item No. Checking motor operation U030 Description Drives each motor. Purpose To check the operation of each motor. Method 1. Press the start key. 2. Select the motor to be operated using the exposure adjustment keys. Display Motor Drive motor (DM) is turned ON Drum motor (DRM) is turned ON Cassette drive motor 1 (CDM1) is turned ON...
  • Page 28 Maintenance Description item No. Checking clutch operation U032 Description Turns each clutch or solenoid on. Purpose To check the operation of each clutch or solenoid. Method 1. Press the start key. 2. Select the clutch or solenoid to be operated using the exposure adjustment keys. 3.
  • Page 29 Maintenance Description item No. Adjusting the print start timing U034 Description Adjusts the leading edge registration, center line or trailing edge margin. Purpose Make the adjustment if there is a regular error between the leading edges of the copy image and original. Make the adjustment if there is a regular error between the center lines of the copy image and original.
  • Page 30 Maintenance Description item No. U034 6. Press the start key. The value is set. (cont.) Caution Check the copy image after the adjustment. If the image is still incorrect, perform the following adjustments in maintenance mode. U066 U071 (See the service manual (See the service manual U034 for the machine.)
  • Page 31 Maintenance Description item No. Adjustment: trailing edge margin adjustment U034 1. Select group 3 using the image mode selection key. (cont.) Description Setting Initial Change in range setting value per step Trailing edge margin adjustment -4.0 to 10.0 0.1 mm 2.
  • Page 32 Maintenance Description item No. Adjusting the deflection in the paper U051 Description Adjusts the deflection in the paper. Purpose Make the adjustment if the leading edge of the copy image is missing or varies randomly, or if the copy paper is Z-folded.
  • Page 33 Maintenance Description item No. Performing fine adjustment of the motor speed U053 Description Performs fine adjustment of the speeds of the motors. Purpose Used to adjust the speed of the respective motors when the magnification is not correct. Also speed adjust- ment for each paper source can be performed in group 2.
  • Page 34 Maintenance Description item No. Specific paper feed location setting for printing function U341 Description Sets a paper feed location specified for printer output. Purpose To use a paper feed location only for printer output. A paper feed location specified for printer output cannot be used for copy output.
  • Page 35 Maintenance Description item No. Checking/clearing copy counts by paper feed locations U901 Description Displays or clears copy counts by paper feed locations. Purpose To check the time to replace consumable parts. Also to clear the counts after replacing the consumable parts. Method 1.

  • Page 36: Maintenance Mode (Operation Panel Is An Lcd Type)

    1-3-2 Maintenance mode (operation panel is an LCD type) 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.

  • Page 37: 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 U030 Checking motor operation feed and U031 Checking switches for paper conveying paper convey- U032 Checking clutch operation ing system U034 Adjusting the print start timing Adjusting the leading edge registration...

  • Page 38: Contents Of Maintenance Mode Items

    (3) Contents of 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 39 Maintenance Description item No. Checking switches for paper conveying U031 Description Displays the on-off status of each paper detection switch on the paper path. Purpose To check if the switches for paper conveying operate correctly. Method 1. Press the start key. 2.
  • Page 40 Maintenance Description item No. Adjusting the print start timing U034 Description Adjusts the leading edge registration or center line. Purpose Make the adjustment if there is a regular error between the leading edges of the copy image and original. Make the adjustment if there is a regular error between the center lines of the copy image and original. Make the adjustment if there is a regular error between the trailing edges of the copy image and original.
  • Page 41 Maintenance Description item No. Adjustment: Center line adjustment U034 1. Select the item to be adjusted using the cursor up/down keys. Display Description Setting Initial Change in range setting value per step LSU OUT Paper feed from cassette -7.0 to 10.0 -2.4 0.1 mm LSU BYP...
  • Page 42 Maintenance Description item No. Adjustment: Trailing edge margin adjustment U034 1. Select [MGN REAR]. Display Description Setting Initial Change in range setting value per step MGN REAR Trailing edge margin adjustment -4.0 to 10.0 0.1 ms 2. Press the interrupt key. 3.
  • Page 43 Maintenance Description item No. Adjusting the deflection in the paper U051 Description Adjusts the deflection in the paper. Purpose Make the adjustment if the leading edge of the copy image is missing or varies randomly, or if the copy paper is Z-folded.
  • Page 44 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 45 Maintenance Description item No. Specific paper feed location setting for printing function U341 Description Sets a paper feed location specified for printer output. Purpose To use a paper feed location only for printer output. A paper feed location specified for printer output cannot be used for copy output. Setting 1.

  • Page 46: Paper Misfeed Detection

    1-4 Troubleshooting 1-4-1 Paper misfeed detection (1) Paper misfeed indication When a paper misfeed occurs, the machine immediately stops copying and displays the jam location on the operation panel. Paper misfeed detection can be reset by opening and closing the cassette left cover to turn safety switch off and on. (2) Paper misfeed detection conditions CPFCL1 CFSW1...
  • Page 47 Section Description Conditions Specified time Paper The registration switch (RSW) does not turn on within the 2290 ms feed No paper feed from first specified time of cassette paper paper feed clutch 1 section paper feeder (CPFCL1) turning on and cannot be detected at the same timing even after retry.

  • Page 48: Paper Misfeeds

    (3) Paper misfeeds Problem Causes/check procedures Corrective measures Paper is extremely curled. Change the paper. A paper jam in the Check if the paper feed pul- Check visually and replace any deformed pulley. paper feed section is ley, separation pulley or for- indicated during warding pulley is deformed.
  • Page 49 Problem Causes/check procedures Corrective measures Broken registration switch, Check visually and replace switch. A paper jam in the cassette feed switch 1 or 2 paper feed section is actuator. indicated during Defective switch. Run maintenance item U031 and turn switch on and off manually. copying (misfeed in Replace the switch if indication of the corresponding switch is not vertical paper con-...
  • Page 50 Problem Causes/check procedures Corrective measures Deformed guides along the Check visually and replace. A paper jam in the paper conveying path. paper feed section is Broken cassette feed Check visually and replace switch. indicated during switch 1 actuator. copying (multiple sheets in second Defective cassette feed Run maintenance item U031 and turn cassette feed switch 1 on...

  • Page 51: Self-Diagnosis

    1-4-2 Self-diagnosis (1) Self-diagnostic function (operation panel is a 7-segment type) When an unexpected error is detected for some reason, a system error (A call error) will be indicated. After a system error (A call error) is indicated, the error can be cleared by turning the main power switch off and then on. If a system error (A call error) occurs frequently, a fault may have occurred.

  • Page 52: Self-Diagnostic Function (Operation Panel Is An Lcd Type)

    (3) Self-diagnostic function (operation panel is an LCD type) When an unexpected error is detected for some reason, a system error will be indicated. After a system error is indicated, the error can be cleared by turning the main power switch off and then on. If the error is detected continuously, however, perform the operation shown in Table 1-4-1.

  • Page 53: Image Formation Problems

    1-4-3 Image formation problems (1) The leading edge of the image is consistently misaligned with the original. Copy example Causes Check procedures/corrective measures Misadjusted leading edge registration. Run maintenance mode U034 to readjust the leading edge registration (see page 1-3-6, 17). (2) The leading edge of the image is sporadically misaligned with the original.

  • Page 54: Electric Problems

    1-4-4 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 feeder nector terminals.
  • Page 55 Problem Causes Check procedures/corrective measures 1. Poor contact in the con- Reinsert the connector. Also check for continuity within the con- The message nector terminals of cas- nector cable. If none, remedy or replace the cable. requesting cover to sette left cover safety be closed is dis- switch.

  • Page 56: Mechanical Problems

    1-4-5 Mechanical problems Problem Causes/check procedures Corrective measures Check if the surfaces of the following rollers or Clean with isopropyl alcohol. No primary paper feed. pulleys are dirty with paper powder: cassette forwarding pulley, cassette paper feed pulley, cassette separation pulley, feed roller and feed pulley.
  • Page 57 This page is intentionally left blank. 1-4-12...

  • Page 58: 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 59: Paper Feed Section

    1-5-2 Paper feed section (1) Detaching and refitting the feed roller Follow the procedure below to replace the feed roller. Procedure 1. Open the cassette left cover. 2. Remove the stop ring from rear side of the Stop ring feed roller and slide the bush toward the inside.

  • Page 60: Detaching And Refitting The Cassette Separation Pulley

    (2) Detaching and refitting the cassette separation pulley Follow the procedure below to replace the cassette separation pulley. Procedure 1. Pull out the cassette. 2. Remove the screw and remove the lower paper feed unit. Screw Lower paper feed unit Figure 1-5-3 3.
  • Page 61 4. Remove the separation pulley shaft from the separation pulley unit. 5. Remove the cassette separation pulley from the separation pulley shaft. 6. Replace the cassette separation pulley and refit all the removed parts. Separation pulley shaft Cassette separation pulley Figure 1-5-5 1-5-4...

  • Page 62: Detaching And Refitting The Cassette Forwarding Pulley And Cassette Paper Feed Pulley

    (3) Detaching and refitting the cassette forwarding pulley and cassette paper feed pulley Follow the procedure below to replace the cassette forwarding pulley and cassette paper feed pulley. Procedure 1. Remove the feed roller (see 1-5-2). 2. Remove the lower paper feed unit (see 1-5- 3.
  • Page 63 7. Remove the screw and remove the upper paper feed unit. Upper paper feed unit Screw Figure 1-5-8 8. Remove the springs, stop ring and bush and Shaft holder then remove the shaft holder from the upper paper feed unit. Spring Bush Spring...
  • Page 64 9. Remove the cassette forwarding pulley from Cassette paper feed pulley the upper paper feed unit. 10. Remove the paper feed pulley shaft from the upper paper feed unit. Collar 11. Remove the collar and the cassette paper feed pulley from the upper paper feed shaft. 12.
  • Page 65 This page is intentionally left blank. 1-5-8...

  • Page 66: Mechanical Construction

    2-1 Mechanical Construction 2-1-1 Mechanical construction The paper feeder feeds paper from either of its cassette to the machine. Cassette can hold up to 300 (80 g/m ) sheets of paper. Paper is fed from the cassette by the rotation of the cassette for- warding pulley and cassette paper feed pulley.
  • Page 67 CPFCL CPSW CFSW CPWSW CPLSW SIZEB,SIZEC,SIZED EPWB CMPWB Figure 2-1-2 Paper feeder block diagram 2-1-2...

  • Page 68: Electrical Parts Layout

    2-2 Electrical Parts Layout 2-2-1 Electrical parts layout (1) PWBs Machine front Machine inside Machine rear Figure 2-2-1 PWBs Cassette main PWB (CMPWB)....Controls electrical components of the paper feeder. Cassette heater PWB (CHPWB)....Relays the cassette heater power. 2-2-1...

  • Page 69: Switches And Sensors

    (2) Switches and sensors Machine front Machine inside Machine rear Figure 2-2-2 Switches and sensors Cassette left cover safety switch (CLCSSW) ........... Breaks the safety circuit when the cassette left cover is opened. Cassette feed switch (CFSW)...... Detects a paper misfeed. Cassette paper switch (CPSW) ....

  • Page 70: Others

    (3) Others Machine front Machine inside Machine rear Figure 2-2-3 Others Cassette drive motor (CDM) ......Drives the paper feeder. Cassette paper feed clutch (CPFCL) ... Primary paper feed from the cassette. Cassette heater (CH) ........Dehumidifies the cassette section. *: Option 2-2-3...
  • Page 71 This page is intentionally left blank. 2-2-4...

  • Page 72: Cassette Main Pwb

    2-3 Operation of the PWBs 2-3-1 Cassette main PWB Figure 2-3-1 Cassette main PWB silk-screen diagram 2-3-1...
  • Page 73 Connector Pin No. Signal Voltage Description 24 V DC 24 V DC power output to paper feeder Connected PGND Ground to the paper feeder +24V1 24 V DC 24 V DC power input from EPWB Connected PGND Ground to the engine PWB Not used Connected...
  • Page 74 Connector Pin No. Signal Voltage Description SGND Ground Connected 0/5 V DC CPSW: On/Off to the cas- 5 V DC 5 V DC power output to CPSW sette paper Not used switch SGND Ground Connected FEED 0/5 V DC CFSW: On/Off to the cas- 5 V DC 5 V DC power output to CFSW...
  • Page 75 This page is intentionally left blank. 2-3-4...
  • Page 76 2-4 Appendixes List of maintenance parts Maintenance part name Alternative Fig. Ref. Part No. part No. Name used in service manual Name used in parts list Cassette paper feed pulley PULLEY,PAPER FEED 2AR07220 Cassette separation pulley PULLEY,SEPARATION 2AR07230 Cassette forwarding pulley PULLEY,LEADING FEED 2AR07240 Feed roller...
  • Page 77 Wiring diagram 2-4-2...

Table of Contents