Utax PF 791 Service Manual
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Utax PF 791 Service Manual

Utax PF 791 Service Manual

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Service
Manual
Paper Feeder
PF 79
Date:
-0 -20
3
SM060

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Summary of Contents for Utax Utax PF 791

  • Page 1 Service Manual Paper Feeder PF 79 Date: -0 -20 SM060...
  • Page 2 Service Manual Paper Feeder PF 79 Date: -0 -20 SM060...
  • 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) Paper feeder........................1-1-2 1-1-3 Machine cross section ......................1-1-3 (1) Paper feeder........................1-1-3 1-2 Installation 1-2-1 Installation environment......................1-2-1 1-2-2 Unpacking..........................1-2-2 (1) Unpacking Paper feeder....................1-2-2 (2) Removing the tapes......................1-2-3 1-3 Maintenance Mode 1-3-1 Maintenance mode ........................
  • Page 13 2-3 Operation of the PWBs 2-3-1 PF main PWB ........................2-3-1 2-4 Appendixes 2-4-1 Appendixes ..........................2-4-1 (1) Wiring diagram ......................... 2-4-1...

  • Page 14: Specifications

    1-1 Specifications 1-1-1 Specifications Item Specifications Paper weight 60 to 256 g/m Paper type Plain, Recycled, Thick A3,A4R,A4, A5R, B4,B5R,B5,Folio,Ledger, LetterR, Letter, Legal, State- Paper size ment, Oficio II, 8K, 16KR,16K 1000 sheets (500 sheets × 2) (80 g/m Loading capacity 590 ×...

  • Page 15: Parts Names

    1-1-2 Parts names (1) Paper feeder Figure 1-1-1 1. Cassette 3 5. Paper length guide 2. Cassette 4 6. Positioning pins 3. Paper type windows 7. Interface connector 4. Paper width guides 8. Right cover 3 1-1-2...

  • Page 16: Machine Cross Section

    1-1-3 Machine cross section (1) Paper feeder Paper path Figure 1-1-2 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 Paper feeder Figure 1-2-1 1. Paper feeder 7. Upper left back pad 13. Plastic bag (240 × 350) 2. Outer case 8. Upper right front pad 14. Plastic bag (70 × 110) 3. Inner case 9. Upper right back pad 15.

  • Page 20: Removing The Tapes

    (2) Removing the tapes 1. Remove four tapes. Tape Tape Tape Tape Figure 1-2-2 1-2-3...
  • Page 21 This page is intentionally left blank. 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 The maintenance item is selected.

  • Page 23: Maintenance Modes Item List

    (2) Maintenance modes item list Item Initial Section Content of maintenance item setting General U000 Outputting an own-status report U001 Exiting the maintenance mode U019 Displaying the firrmware version Drive, U034 Adjusting the print start timing paper feed LSU Out Top 0/0/0 and paper LSU Out Left...

  • Page 24: Contents Of The Maintenance Mode Items

    (3) Contents of the maintenance mode items Item No. Description U000 Outputting an own-status report Description Outputs lists of the current settings of the maintenance items and paper jam and service call occurrences. Outputs the event log. Also sends output data to the USB memory. Purpose To check the current setting of the maintenance items, or paper jam or service call occurrences.
  • Page 25 Item No. Description U000 Method: Send to the USB memory 1. Press the power key on the operation panel, and after verifying the main power indicator has gone off, switch off the main power switch. 2. Insert USB memory in USB memory slot. 3.
  • Page 26 Item No. Description U000 Event log Event Log 2013/18/02 15:15 TASKalfa 2551ci Firmware version 2NP_2000.000.000 2013.18.02 [XXXXXXXX] [XXXXXXX] [XXXXXXX] [XXXXXXXX] (12) Paper Jam Log Counter Log Count. Event Descriprions J0100: J4201: C0030: T00: 1876543 0501.01.08.01.01 J0101: J4202: C0070: T01: 166554 4002.01.08.01.01 J0104: J4203:...
  • Page 27 Item No. Description U000 Detail of event log Items Description System version System date Engine soft version Engine boot version Controller BROM version Operation panel mask version Machine serial number Paper Jam Count. Event Remembers 1 to 16 of The total page count Log code (hexadeci- occurrence.
  • Page 28 Item No. Description U000 Items Description Paper Jam (d) Detail of paper type (Hexadecimal) cont. 01: Plain 0A: Color 15: Custom 1 02: Transparency 0B: Prepunched 16: Custom 2 03: Preprinted 0C: Envelope 17: Custom 3 04: Labels 0D: Cardstock 18: Custom 4 05: Bond 0E: Coated...
  • Page 29 Item No. Description U000 Items Description (11) Unknown Toner Count. Item Remembers 1 to 5 The total page count Unknown toner log of occurrence of at the time of the code unknown toner toner empty error (1 byte, 2 categories) detection.
  • Page 30 Item No. Description U000 Service status page (1) Service Status Page 2013/02/18 15:15 Firmware version 2NP_2000.000.000 2013.02.18 [XXXXXXXX] [XXXXXXXX] [XXXXXXXX] Controller Information (30) FAX Information Slot1/Slot2 (31) Rings (Normal) Memory status (32) Rings (FAX/TEL) Total Size 2.0 GB (33) Rings (TAD) (34) Option DIMM Size 16 MB...
  • Page 31 Item No. Description U000 Service status page (2) Service Status Page 02/18/2013 15:15 Firmware version 2NP_2000.000.000 2013.18.02 [XXXXXXXX] [XXXXXXXX] [XXXXXXXX] Engine Information Send Information (40) NVRAM Version _1F31225_1F31225 (44) Date and Time 11/08/02 15:15 (41) (45) Scanner Version 2LC_1200.001.089 Address (42) FAX Slot1 FAX BOOT Version...
  • Page 32 Item No. Description U000 Detail of service status page Description Supplement Firmware version System date Engine soft version Engine boot version Operation panel mask version Machine serial number Total memory size Local time zone Report output date Day/Month/Year hour:minute (10) NTP server name (11) Presence or absence of the...
  • Page 33 Item No. Description U000 Description Supplement (28) Cleared date and output date (29) Coverage on the final output page (30) Fax kit information This item is printed only when the fax kit is installed. (31) Number of rings 0 to 15 (32) Number of rings before auto- 0 to 15...
  • Page 34 Item No. Description U000 Description Supplement (44) The last sent date and time (45) Transmission address (46) Destination information (47) Area information (48) Margin settings Top margin/Left margin (49) Margin/Page length/Page width Top margin integer part/Top margin decimal part/ settings Left margin integer part/Left margin decimal part/ Page length integer part/Page length decimal part/ Page width integer part/Page width decimal part...
  • Page 35 Item No. Description U000 Description Supplement (65) Media type attributes Weight settings Fuser settings 1 to 28 (Not used: 18, 19, 20) 0: Light 0: High 1: Normal 1 1: Middle 2: Normal 2 2: Low 3: Normal 3 3: Vellum 4: Heavy 1 Duplex settings 5: Heavy 2...
  • Page 36 Item No. Description U000 Description Supplement (89) Low coverage setting 0.1 to 100.0 (90) Middle coverage setting 0.1 to 100.0 (91) Data Sanitization information (92) Toner low setting 0: Enabled 1: Disabled (93) Toner low detection level 0 to 100 (%) (94) A shift restriction setup 0: Enabled (Shift restrictions off)
  • Page 37 Item No. Description Exiting the maintenance mode U001 Description Exits the maintenance mode and returns to the normal copy mode. Purpose To exit the maintenance mode. Method Press the start key. The normal copy mode is entered. U019 Displaying the firrmware version Description Displays the part number of the ROM fitted to each PWB.
  • Page 38 Item No. Description U019 Display Description Document processor firmware DP Boot Document processor booting Paper feeder firmware PF1 Boot Paper feeder booting Document finisher firmware DF Boot Document finisher booting Mailbox firmware MT BOOT Mailbox booting Fax APL1 FAX APL1 Fax Boot1 FAX boot1 Fax IPL1...
  • Page 39 Item No. Description U034 Adjusting the print start timing 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.
  • Page 40 Item No. Description U034 5. Change the setting value using the +/- keys or numeric keys. For output example 1, increase the value. For output example 2, decrease the value. Leading edge registration (20 ± 1.5 mm) Correct image Output Output example 1 example 2...
  • Page 41 Item No. Description U034 5. Change the setting value using the +/- keys or numeric keys. For output example 1, increase the value. For output example 2, decrease the value. Center line of printing (within ± 0.5 mm) Correct image Output Output example 1...
  • Page 42 Item No. Description U051 Adjusting the deflection in the paper Description Adjusts the deflection in the paper at the registration roller. 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 43 Item No. Description U247 Setting the paper feed device Description Turns on motor and clutches of paper feeder device. Purpose To check the operation of motor and clutches of paper feed device. Method 1. Press the start key. 2. Select the paper feed device. Display Description Paper feeder...
  • Page 44 Item No. Description U327 Setting the cassette heater control Description Sets the cassette heater control. Purpose To change the setting according to the machine installation environment. Setting 1. Press the start key. 2. Select On or Off. Display Description Cassette heater ON Cassette heater OFF Initial setting: Off 3.
  • Page 45 Item No. Description U901 Checking copy counts by paper feed locations 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 con- sumable parts. Method 1.

  • Page 46: Paper Misfeed Detection

    1-4 Troubleshooting 1-4-1 Paper misfeed detection (1) Paper mis feed indication When a paper misfeed occurs, the machine immediately stops printing and displays the paper misfeed mes- sage on the operation panel. To remove paper misfed in the machine, pull out the cassette, open the paper conveying unit or paper conveying cover.
  • Page 47 Code Contents Conditions location* 0000 Initial jam The power is turned on when a sensor in the con- veying system is on. 0104 Waiting for conveying pack- Conveying package won’t be ready. age to be ready 0112 Right cover 3 open The right cover 3 is opened during printing.

  • Page 48: Self-Diagnostic Function

    1-4-2 Self-diagnostic function (1) Self-diagnostic function This machine is equipped with self-diagnostic function. When a problem is detected, the machine stops print- ing and display an error message on the operation panel. An error message consists of a message prompting a contact to service personnel and a four-digit error code indicating the type of the error.
  • Page 49 Check procedures/ Code Contents Causes corrective measures 1800 Paper feeder communica- Improper installa- Follow the installation instruction carefully tion error tion of the paper again. A communication error is feeder. detected 10 times in succes- Defective connec- Reinsert the connector. Also check for conti- sion.

  • Page 50: Electric Problems

    1-4-3 Electric problems If the part causing the problem was not supplied, use the unit including the part for replacement. Troubleshooting to each failure must be in the order of the numbered symptoms. Problem Causes Check procedures/corrective measures 1. No electricity at the Measure the input voltage.
  • Page 51 Problem Causes Check procedures/corrective measures 1. Defective connector Reinsert the connector. Also check for continuity within the The size of paper cable or poor con- connector cable. If none, replace the cable. on the cassette is tact in the connector. PF paper size length switch 1 and PF main PWB (YC5) not displayed cor- PF paper size length switch 2 and PF main PWB (YC8)

  • Page 52: Mechanical Problems

    1-4-4 Mechanical problems If the part causing the problem was not supplied, use the unit including the part for replacement. Problem Causes/check procedures Corrective measures Check if the surfaces of the following roll- Clean with isopropyl alcohol. No primary paper ers are dirty with paper powder.
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  • Page 54: Precautions For 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. When handling PWBs (printed wiring boards), do not touch parts with bare hands.

  • Page 55: Paper Feed Section

    1-5-2 Paper feed section (1) Detaching and refitting the primary paper feed units Procedure 1. Remove the cassettes. Cassette 1 Cassette 2 Figure 1-5-1 2. Push up the paper feed lever and then remove the primary paper feed unit. Paper feed levers Primary paper feed unit Figure 1-5-2 1-5-2...

  • Page 56: Detaching And Refitting The Drive Unit

    (2) Detaching and refitting the drive unit Procedure 1. Remove two screws. 2. Release three hooks and then remove the rear cover. Screw Screw Rear cover Hooks (back side) Figure 1-5-3 3. Remove the connector of the motor. Motor 4. Release the wire from hooks. 5.

  • Page 57: Detaching And Refitting The Pf Main Pwb

    (3) Detaching and refitting the PF main PWB Procedure 1. Remove the rear cover. 2. Remove all connectors from the PF Hook main PWB. 3. Remove two screws. 4. Release two hooks and then remove the PF main PWB. PF main PWB Screw Screw PF main PWB...

  • Page 58: Upgrading The Firmware

    1-6 Requirements on PWB Replacement 1-6-1 Upgrading the firmware Follow the procedure to upgrade the firmware below. * Main PWB (CTRL) * Engine PWB (ENGN) * DP main PWB (DP) * FAX PWB (FAX) * PF main PWB (PF) * First color table (CLT1) * DF main PWB (DF) * Second color table (CLT2) * Bridge PWB (AK)
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  • Page 60: Mechanical Construction

    2-1 Mechanical Construction 2-1-1 Mechanical construction The paper feeder feeds paper from either of its two cassettes to the machine.The cassette can contain 500 sheets (80 g/m ). The sheet from the cassette is pulled out by rotation of the pickup roller and sent to the paper conveying section by rotation of the paper feed roller.
  • Page 61 PFMPWB REG_CL_REM YC4-6 REG_CL_REM1 YC4-3 PFLS1 PFLS1 YC3-3 PFPF PFPS1(U) YC3-6 PFPS1(U) PFPS1(L) PFPS1(L) YC3-9 LIFT_REM1 PFLM1 YC4-1 PAPLSIZE1(1),(2),(3) PFDM PFPLSW1 YC5-1,2,4 PAPWSIZE1 PFPWSW1 YC5-5 PFLS2 PFFS1 YC6-3 PFLS2 PFPS2(U) YC6-6 PFPS2(U) PFPF PFPS2(L) PFPS2(L) YC6-9 LIFT_REM2 YC7-1 PFLM2 PAPLSIZE2(1),(2),(3) PFPLSW2 YC8-1,2,4 PAPWSIZE2...

  • Page 62: Electrical Parts Layout

    2-2 Electrical Parts Layout 2-2-1 Electrical parts layout (1) Paper feeder Machine front Machine inside Machine rear Figure 2-2-1 1. PF main PWB (PFMPWB) ....Controls electrical components in the paper feeder and serial communications with the machine. 2. Right cover 3 switch (RC3SW) ..... Breaks the safety circuit when right cover 3 is opened. 3.
  • Page 63 13. PF feed sensor 1 (PFFS1) ....Detects a paper jam. 14. PF drive motor (PFDM)......Drives the paper feeder. 15. PF lift motor 1 (PFLM1)......Drives the bottom plate of cassette 3. 16. PF lift motor 2 (PFLM2)......Drives the bottom plate of cassette 4. 17.
  • Page 64 2-3 Operation of the PWBs 2-3-1 PF main PWB Figure 2-3-1 PF main PWB silk-screen diagram 2-3-1...
  • Page 65 Connector Signal Voltage Description Ground Ground Connected to the.interface 3.3V4 3.3 V DC 3.3 V DC power input from machine connector 3.3V0 3.3 V DC 3.3 V DC power input from machine 24V4 24 V DC 24 V DC power input from machine PF_PAUSE 0/3.3 V DC Pause signal...
  • Page 66 Connector Signal Voltage Description LIFT_REM1 0/3.3 V DC PFLM1: On/Off 24V4 24 V DC 24 V DC power output to PFLM1 Connected to the PF lift REG_CL_RE 0/3.3 V DC PFPFCL1: On/Off motor 1, PF paper feed Not used clutch 1 and PF convey- 24V4 24 V DC...
  • Page 67 Connector Signal Voltage Description PAPLSIZE2(3) 0/3.3 V DC PFPLSW2: On/Off PAPLSIZE2(2) 0/3.3 V DC PFPLSW2: On/Off Connected to the PF paper Ground size length PAPLSIZE2(1) 0/3.3 V DC PFPLSW2: On/Off switch 2 and PF paper PAWLSIZE2 0/3.3 V DC PFPWSW2: On/Off size width Ground switch 2.
  • Page 68 2-4 Appendixes 2-4-1 Appendixes (1) Wiring diagram M A C H I N E P F M P W B Y C 3 3 . 3 V 4 P F L S 1 G N D E P W B P F L S 1 Y C 1 E H _ C L K...
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