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Minolta PageWorks/Pro 25 Service Manual
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Minolta PageWorks/Pro 25 Service Manual

Minolta PageWorks/Pro 25 Service Manual

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PageWorks/Pro 25
SERVICE MANUAL

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Summary of Contents for Minolta PageWorks/Pro 25

  • Page 1 PageWorks/Pro 25 SERVICE MANUAL...
  • Page 2 SAFTY INFORMATION All Areas INTERNAL LASER RADIATION Maximum average radiant power: 31.3 x 10 Wavelength: 770-810 (nm) This product employs Class IIIb Laser Diode. Laser Diode and Scanning Polygon Mirror are incorporated in the print head unit. The print head unit is NOT A FIELD SERVICE ITEM. Therefore, the print head unit should not be opened under any circumstance.
  • Page 3 For Denmark Users ADVARSEL: Usynlig laserstråling vad åbning, når sikkerhedsafbrydere er ude af funktion. Undgå udsttelse for stråling. Klasse 1 laser produkt der opfylder IEC60825 sikkerheds kravene. For Finland, Sweden Users VAROITUS!: Laitteen käyttäminen muulla kuin tässä käyttöohjeessa maintulla tavalla saattaa altistaa käyttäjän turvallisuusluokan 1 ylittävälle näkymättömälle lasersäteilylle.
  • Page 4 Please read the following for your own protection. Caution Opening the cover indicated by Caution label below may expose you to harmful laser radiation which could cause damage or loss of eyesight. Do not Open the Cover when the power is on.
  • Page 5 PRECAUTIONS (1) Precautions Refer to D: DISASSEMBLY/CLEANING for Disassembly procedure. 1. When unplugging connectors on the P.W.B.s themselves, always make sure the power is OFF first. Be sure to unplug the printer before disassembling and cleaning. 2. Always unplug connectors by holding the connector housing. Pulling on the wires can lead to problems with poor contact.
  • Page 6 CONTENTS A: PRODUCT INSTALLATION 1. PRECAUTIONS FOR INSTALLATION ........A-1 1-1.
  • Page 7 C: MECHANICAL / ELECTORICAL 1. CONFIGURATION OF THE PRINTER ........C-1 1-1.
  • Page 8 D: DISASSEMBLY AND CLEANING 1. MAINTENANCE, INSPECTION, AND PROHIBITED OPERATIONS ..D-1 1-1. Replacement of Parts ..........D-1 1-2.
  • Page 9 A: PRODUCT INSTALLATION...
  • Page 10 PRECAUTIONS FOR INSTALLA- TION 1-1. Installation Site When installing the printer, please avoid the types of locations listed below, both for safety condi- tions and to breakdowns. • Which is exposed to direct sunlight. • Which is damp or dusty. •...
  • Page 11 INSTALLATION 2-1. Connection The following items should be connected before use. • Connect the Parallel Interface Cable. • Connect the Power Cord. 2-2. Moving Caution: The printer weighs approximately 30kg (2 pounds) without the Imaging Cartridge, paper and Options. Don’t lift the printer by yourself. Have at least on other person assist you.
  • Page 12 2-3. Space Requirement Note: The minimum space requirements for install of the printer are enclosed in a . To ensure easy operation, replacement of consumable, and maintenance service jobs, provide the following space for the installation of the printer. 630 mm (24-3/4") 300 mm (11-3/4")
  • Page 13 B: GENERAL INFORMATION...
  • Page 14 SPECIFICATIONS Type : Desktop Laser Beam Printer, Console Laser Beam Printer Printing system : Electrostatic dry powdered imaging system Exposure system : Laser Diode + Polygon Mirror scanning Print resolution : 600 dpi Print image : Single print within 4 mm of paper edge Duplex print (option) within 4 mm of paper edge Printing time...
  • Page 15 Acoustic noise : 67 dB (A) or less (printing) 47 dB (A) or less (standby) Printer life : 500,000 prints (converted to A4 C or Letter C) or 5 years Recommended : 6,000 prints on the average prints per month?? Imaging Cartridge : 15,000 prints or more/A4 C/Letter C (when the black-to-white ratio is 5% on multi...
  • Page 16 Controller : PowerPC603e 90MHz Memory : 8MB (upgrade to 104MB) Interface : IEEE1284 (Compatible, Nibble, ECP) Connector type B (36 pin Centronics) (Automatic interface selection upon data reception if an optional Network Board is used.) Display Panel : LCD 16 characters x 2 lines , 3 LEDs, 8 keys Supporting 8 languages Accessories : Power Cord...
  • Page 17 PARTS IDENTIFICATIONS Control Panel Side Cover Power Switch Tray 1 Side Cover Release Lever Tray 2 Paper Size Selection Dial Parallel Interface Connector Power Cord Socket Imaging Cartridge...
  • Page 18 CONTROL PANEL 3-1. Control panel 1. Data LED 8. Enter/Job Cancel key 2. Message LED 9. Select key 3. On Line LED 10. Item key 4. On Line key 11. Menu key 5. Proceed key 6. Tray1 Paper key 7. Shift key (1) LED Flashing On Line...
  • Page 19 (2) Function of Keys Function On Line : Changes the on-line/off-line condition. Acts as a stop key during in on-line. : • Commands the printer to continue printing for forcibly ejecting the paper when the Proceed printer goes to off-line because of occurrence of an error. •...
  • Page 20 (3) Service Mode Tree Menu Item Option SERVICE TOTAL COUNT 0000000 - 9999999 MENU LARGE SIZE COUNT 0000000 - 9999999 STAPLE COUNT 000000 - 999999 RESET COUNT I/C COUNT 000000 - 999999 RESET COUNT LOOP ADJUST T2-5 -4.9, -4.2, -2.8, -2.1, -0.7, 0*, +0.7, +2.1, +2.8, +4.2, +4.9 mm LOOP ADJUST T1 -4.9, -4.2, -2.8, -2.1, -0.7, 0*, +0.7, +2.1, +2.8, +4.2, +4.9 mm [LOOP ADJUST DUP]...
  • Page 21 3-3. Condition Messages Message READY TRAY1EMPTY Warning message Messages READY : Awaiting data OFF LINE : Off-line PROCESSING : Image processing for data received through the parallel port PRINTING : Printing data COPYING : Feeding paper with the engine CANCELING JOB : Canceling job After canceling, the printer goes to on-line.
  • Page 22 3-4. Caution Messages DATA COMPRESSION Caution message (Please see the user’s manual) 3-5. Auto-continuable Messages MEMORY OVERFLOW Auto-continuable message (Please see the user’s manual) 3-6. Operator Call Messages NO PAPER Operator call message (Please see the user’s manual) 3-7. Serviceman Call Messages FATAL ERROR1 ROM Serviceman call message (Please see the troubleshooting)
  • Page 23 COMPONENT LAYOUT 1. Print Head Unit (PU) 19. 1st Cassette Paper Take-up Roller 2. Toner Empty Detecting Board (PWB-G) 20. 1st Cassette Paper Take-up Solenoid (SL1) 3. Imaging Cartridge 21. 1st Cassette Paper Empty Sensor (PC4) 4. Sleeve Roller 22. 2nd Paper Cassette 5.
  • Page 24 GEAR/ROLLER ASSIGNMENT The locations of the gears and rollers in the printer is shown below. The transport motor (M2) transmits the power to the paper driving parts for feeding paper. Meanwhile, the I/C drive motor (M1) transmits the power to the driv- ing parts in the imaging cartridge.
  • Page 25 ELECTRICAL COMPONENT LAYOUT : Print Head Unit SL21 : 2nd Cassette Paper Take-up Solenoid : Power Supply Unit : Synchronizing Clutch : High Voltage Unit : Transport Clutch PWB-A : Main Board : Power Switch PWB-A2 : 2nd Cassette Main Board : Right Door Interlock Switch PWB-G : Toner Empty Detecting Board...
  • Page 26 CONNECTOR LAYOUT B-13...
  • Page 27 SWITCH/SENSOR IDENTIFICATION Printer main body Symbol Name Function Power Switch Turns power on and off. Right Door Interlock Detects open/close condition of the right door. Switch When it is closed, the switch is ON. Synchronizing Roller Detects the paper fed from the tray. Active: “L”. Sensor Paper Exit Sensor Detects paper ejection from the printer.
  • Page 28 2nd Paper Cassette Symbol Name Function PC22 2nd Cassette Paper Detects paper empty condition of the 2nd paper cassette. Empty Sensor Active: “L” PC25 2nd Cassette Paper Detects paper near empty condition of the 2nd paper cassette. Near Empty Sensor Active: “L”...
  • Page 29 ELECTRICAL SERVICE PARTS ON P.W. BOARDS B-16...
  • Page 30 B-17...
  • Page 31 SYSTEM LAYOUT 10-1.Drive Section The parts that control the driving system are shown below. They are motors, solenoids, clutches, rollers, and sen- sors. • Right Door Interlock Switch (S2) • 1st Cassette Paper Size Slection Dial (PWB-S1) Main Board • 2nd Cassette Paper Size Slection Dial (PWB-A) (PWB-S2) •...
  • Page 32 10-2.Electrical Section The power supply system and the signal lines are shown below. PPM Switching Board (PWB-L) Control Panel (PWB-OP) 2nd Paper Size Detecting 2nd Cassette Main Board Board (PWB-S2) (PWB=A2) Controller 1st Paper Size Detecting Toner Empty Detecting Board (PWB-S1) Board (PWB-G) Control Board (PWB-P) Double Feed Detecting...
  • Page 33 SEQUENCE FLOW To carry out printing cycles, signals are transferred among the controller, main control and engine as shown below. Host PC Controller Main Control Interface IEEE1284, [Network] Initialize Warm-up Command Processor Detecting JAM, Er- -PRRDY Language detection Job control Error check Standby -CPRDY...
  • Page 34 C: MECHANICAL/ ELECTRICAL...
  • Page 35 CONFIGURATION OF THE PRINTER The following diagram shows the major parts of the printer and the paper path in the printer. The printer consists of the paper feed section, print head unit (exposure section), imaging cartridge (charging section and development section), transfer section, fusing section, and paper exit section.
  • Page 36 1-1. General Description of Each Section (1) Paper Feed Section Paper is fed from either the tray 1 (1st paper cassette) or tray 2 (2nd paper cassette). When the printer receives a print command, the paper take-up solenoid turns ON and a sheet of paper is fed by the paper take-up roller in the 1st paper cassette.
  • Page 37 1-2. General Flow for Printing Process The following shows the general printing process flow. Note: For detailed printing sequence, see 10 “Printing Sequence”. Print Command The polygon motor in the print head unit starts turning. Polygon motor ON • Charge bias, developer bias, seal bias and transfer bias volt- ages are applied.
  • Page 38 PAPER FEED SECTION 2-1. Tray 1 (1st Paper Cassette) 2-1-1. Taking up Paper The power is transmitted from the transport motor (M2) as follows to take up paper from the 1st paper cassette. 1 The transport motor (M2) turns counterclockwise → 2 The idle gear turns clockwise. →The 1st cassette paper take-up solenoid (SL1) turns ON.
  • Page 39 Synchronizing Roller Separator Pad 1st Cassette Paper Take-up Sensor (PC2) Solenoid (SL1) 1st Cassette Set Double Feed Sensor Sensor (PC6) Paper Take-up Roller 1st Cassette Paper Near Empty Sensor (PC5) 1st Cassette Paper Empty Sensor (PC4)
  • Page 40 2-1-2. Sensors for Tray 1 (1) 1st Cassette Set Sensor (PC6) This sensor detects the installation of the 1st paper cassette in the tray 1. This sensor uses a photointerrupter. If the 1st paper cassette is not installed in the tray 1, the projection of the paper cassette comes off the sensor which is mounted on the printer.
  • Page 41 (2) 1st Cassette Paper Empty Sensor (PC4) This sensor detects the paper empty status of the 1st paper cassette. The sensor uses a photointerrupter. When paper runs out in the 1st paper cassette, paper empty occurs. When paper is present in the paper cassette, the lower part of the sensor arm is pressed by the paper and the projec- tion of the upper part of the sensor arm comes off the photointerrupter.
  • Page 42 (4) Double Feed Sensor The double feed sensor is on the double feed detecting sensor board (PWB-H) and detects the possibility of double feed. This sensor uses a photo reflector. The double feed sensor detects whether the leading edge of paper to be taken up next runs 10 mm or more from the paper nip point.
  • Page 43 (6) 1st Cassette Paper Size Detection The paper size for the 1st paper cassette is set by the switch on the 1st cassette paper size detecting board (PWB- S1). The switch is a rotary encoder with four output lines. The output levels of the four output lines vary with the rotational angles of the switch.
  • Page 44 2-2. Tray 2 (2nd Paper Cassette) 2-2-1. Taking up Paper The power is transmitted from the transport motor (M2) as follows to take up paper from the 2nd paper cassette. 1 The transport motor (M2) turns counterclockwise → 2 The idle gear turns clockwise. → 3 The 1st cassette paper take-up gear turns counterclockwise.
  • Page 45 2nd Cassette Paper Empty Sensor (PC22) 2nd Cassette Paper Near Empty Sensor (PC25) Paper Take-up Roller 2nd Cassette Set Switch (SW3) 2nd Cassette Paper 2nd Cassette Side Door Take-up Solenoid (SL21) Detecting Sensor (PC23) C-11...
  • Page 46 2-2-2. Sensors for Tray 2 (1) 2nd Cassette Set Switch (SW3) This switch detects whether the 2nd paper cassette is installed in the tray 2 or not. This switch also detects the paper cassette type; 250 sheet universal cassette or 500 sheet fixed cassette. If no paper cassette is installed on the tray 2, the switch is not pressed by the paper cassette.
  • Page 47 2nd Cassette Paper Near Empty Sensor (PC25) Light is blocked: Light passes: Output = H Output = L Paper Few paper Paper Lifting Plate [Paper near empty] [Paper is present.] (4) 2nd Cassette Side Door Detecting Sensor (PC23) This sensor detects whether the 2nd cassette side door is closed or not. The sensor uses a photointerrupter. The side door is normally closed except when removing jammed paper.
  • Page 48 2-3. Paper Feed The paper taken up by the paper take-up section is fed to the transfer section after registration compensation. (1) Registration Compensation To eliminate any paper slant (skew), registration compensation is made by controlling the rotating timing of the paper take-up roller and synchronizing roller.
  • Page 49 (2) Paper Feeding When the synchronizing clutch (CL1) is activated, the power is transmitted to the synchronizing roller from the transport motor (M2) as follows and the paper is fed to the transfer section. 1 The transport motor (M2) turns counterclockwise. → 2 The idle gear turns clockwise. The synchronizing clutch (CL1) turns ON.
  • Page 50 PRINT HEAD UNIT (EXPOSURE SECTION) The print head unit incorporates a laser diode that emits the laser beam corresponding to the print image data. The spot of the laser beam emitted from the laser diode is shaped in a circle through the collimator lens. Then, it is applied to the heptagonal polygon mirror via the cylindrical lens.
  • Page 51 IMAGING CARTRIDGE 4-1. Parts Names and Functions of the Imaging Cartridge The following illustrates the construction of the imaging cartridge. The power to the gears of the imaging cartridge is transmitted from the I/C drive motor (M1) of the printer main body. (The I/C drive motor (M1) turns clockwise viewing from the front of the printer.) Charge Brush Cleaning Blade...
  • Page 52 4-2. Charging Section Before producing an electrostatic latent image on the surface of the PC drum with a laser beam, the PC drum is charged by static electricity with the rotating charge bush so that the surface of the PC drum is negatively charged. The charging system uses the rotating charge brush system.
  • Page 53 4-3. Development Section The development section feeds toner to the electrostatic latent image on the surface of the PC drum to produce a visible toner image. The toner in the toner hopper is agitated by the two agitator blades to feed toner to the toner feed roller. Then, the toner is fed to the sleeve roller which is negatively biased.
  • Page 54 TRANSFER SECTION The transfer roller transfers the toner image on the surface of the PC drum onto the paper. A positive transfer bias is applied to the transfer roller so that the toner on the surface of the PC drum sticks to the paper. The paper then passes through the comb electrode and the static electricity remaining on the paper is discharged.
  • Page 55 FUSING SECTION The power from the transport motor (M2) is transmitted to the upper fusing roller so that the toner-transferred paper is fed from the transfer section to the fusing section. The paper is heated to melt the toner by the upper fusing roller and pressed by the upper and lower fusing rollers. The upper fusing roller is heated by the fusing roller heater lamp (H1) which is built in it.
  • Page 56 Fusing temperature control: • When the power switch is turned ON, the printer starts the fusing warm-up operation. Preparation revolutions are performed for 20 seconds after the temperature of the upper fusing roller reaches 183°C(361°K). When the preparation revolutions end, the warm-up operations are completed and the upper fusing roller temperature is approximately 200°C(392°K) at this time.
  • Page 57 Fusing PPM Control: The temperature at the end of the fusing roller increases when small size paper (paper widths smaller than 250mm) is printed continuously. The fusing PPM control prevents this situation by increasing the distance between the sheets of paper and then delivering the paper. Control Setting Conditions To set the fusing PPM control, the number of sheets of small size paper is counted and the count number must reach a fixed number.
  • Page 58 PAPER EXIT SECTION The paper fed from the fusing section passes through the paper exit roller and ejected to the top of the printer with its printed side facing down. The transmit power for feeding paper is given by the transport motor (M2) and trans- mitted in the order from 1 ~ B shown in the figure.s The paper exit sensor (PC3) detects ejection of paper.
  • Page 59 Paper Exit Roller Paper Exit Sensor (PC3) Paper Lower Fusing Roller Upper Fusing Roller PC Drum Transport Motor (M2) Synchronizing Roller Synchronizing Roller Sensor (PC2) C-25...
  • Page 60 DETECTION OF A NEW IMAGING CARTRIDGE The printer has the function to detect whether the newly installed imaging cartridge is a new one or used one. In the imaging cartridge, an internal circuit is incorporated as shown in the figure. A fuse is connected in parallel with a resistor and it is not blown.
  • Page 61 PRINT SEQUENCE Start sequence Pre-printing Printing sequence sequence Starting sequence (2sec) Polygon Motor Synchronizing Sensor ON Roller Sensor (PC2) I/C Drive Motor (M1) Charge Bias Exposure 120msec 20mm Developing setting bias +120V Developer Bias -200V Developing bias (Varies with paper.) 100msec +220V Seal Bias...
  • Page 62 Multiple sequence Printing Printing Sequence between printing sequence sequence Pre-printing Post printing Polygon Motor Synchronizing Sensor OFF Sensor ON Sensor ON Roller Sensor (PC2) I/C Drive Motor (M1) Charge Bias Exposure Developing bias Developer Bias Developing setting bias (Varies with paper.) (VB: Developer Bias Voltage) Seal Bias VB + 100V...
  • Page 63 Ending sequence Ending sequence Polygon Motor Synchronizing Sensor OFF Roller Sensor (PC2) I/C Drive Motor (M1) Charge Bias Exposure 100msec 200msec +120V Developing Developer Bias -200V setting bias +220 -100V Seal Bias VB + 100V (VB: Developer Bias Voltage) Transfer Bias 67mm 32mm 120mm...
  • Page 64 PARALLEL INTERFACE 11-1. Connector pin assignments (Standard Centronics and IEEE1284-Type B) Item Item Item Strobe (Host Cik) Select (X flag) S. Gnd (D6) AutoFd (HostAck) S. Gnd (D7) Not defined S. Gnd (D8) Logic Gnd S. Gnd/PE, Select, Ack Chassis Gnd S.
  • Page 65 D: DISASSEMBLY AND CLEANING...
  • Page 66 MAINTENANCE, INSPECTION, AND PROHIBITED OPERATIONS 1-1. Replacement of Parts Parts Name Replacement Cycle Ref. page (Continuous 15,000 sheets/intermittent Imaging Cartridge 12,000 sheets) When a malfunction develops (continuous Fusing Unit 500,000 sheets/intermittent 300,000 sheets) When a malfunction develops (continuous/ Image Transfer Roller Unit D-11 intermittent 150,000 sheets) When a malfunction develops (continuous/...
  • Page 67 DISASSEMBLY PROCEDURES ] Before starting the disassembly procedure, open the Vertical Transport Door and remove the Imaging Cartridge. 2-1. Removal of the Imaging Cartridge 1. Open the Vertical Transport Door. 4108D001AA 2. Hold onto the handle (green) of the Imaging Cartridge and slide the Imaging Cartridge out of the copier.
  • Page 68 2-2. Removal of the Outer Covers 4108D045AA ¿ ¡ 4108D046AA...
  • Page 69 Parts Name Removal Procedure Access Cover Unhook the two tabs and remove the Access Cover. Upper Metal Bracket Remove seven screws and metal bracket. Upper Cover Remove two screws and remove the Upper Cover by lifting it upward. Vertical Transport Raise the stopper and open the Vertical Transport Door.
  • Page 70 2-3. Removal of the Circuit Boards PWB-P PWB-A Handle Left Reinforcement Plate 4108D005AA Parts Name Removal Procedure Controller Board Access Cover, Upper Cover, Front Cover, Left Cover, Harness Cover, CN Cover, Rear Cover, Control Board Reinforcement Box (see 2-2.) → (PWB-P) Remove eight screws, unplug one connector, and then remove PWB-P.
  • Page 71 2-4. Fusing Unit (1) Removal of the Fusing Unit 1. Open the Vertical Transport Door. 4108D001AA 2. Remove the Front Cover. 3. Unplug one connector at the front side. 4108D006AA 4. Open the Fusing Unit Cover and unplug two connectors (3P, 4P) in the rear.
  • Page 72 (2) Removal of Parts Paper Exit Sensor and Actuator 1. Open the Fusing Unit Cover and remove the Paper Exit Sensor Cover. 4108D008AA 2. Unplug one connector, and remove the Paper Exit Sen- sor. 3. Remove the actuator. 4108D009AB Heater Lamp Cover 4.
  • Page 73 Fusing Heater Lamp 9. Remove two screws and the Heater Lamp Holder (Rear). 10. Pull out the Fusing Heater Lamp. NOTES • Do not touch the glass tube of the Fusing Heater Lamp with bare hands. • When reinstalling Fusing Heater Lamp, ensure that its side with the lamp voltage marking is on the gear side.
  • Page 74 14. Remove the Upper Fusing Roller and bearings. 4108D017AA Lower Fusing Roller 15. Remove the G-ring and bushing at the front. 16. From the gear end, pull out the Lower Fusing Roller. 4108D018AA Fusing Roller Thermistor 17. Remove one screw and the Fusing Roller Thermistor. 4108D019AA Fusing Roller Thermostat 18.
  • Page 75 Upper Paper Separator Fingers 20. Slide the fixing shaft from the Upper Paper Separator Fingers Assy and remove the Upper Paper Separator Fingers. 4108D022AA Lower Paper Separator Fingers 21. Unhook the finger springs, remove the Lower Paper Separator Fingers. 4108D023AB Upper Transport Roller 22.
  • Page 76 2-5. Image Transfer Unit (1) Removal of the Image Transfer Roller Unit 1. Open the Vertical Transport Door. 4108D001AA 2. Raise the Pre-Image Transfer Guide Plate. 1167D061AA 3. Remove the Image Transfer Roller Unit. NOTE Do not touch the Image Transfer Roller with bare hands. 4108D027AA (2) Removal of Parts Synchronizing Roller Sensor...
  • Page 77 3. From the back side of the Image Transfer Unit, remove the Front Synchronizing Roller Sensor. 4108D029AA Synchronizing Roller 4. Remove the Paper Dust Remover. 4108D037AA 5. Remove one E-ring and Transport Clutch. 6. Snap off four E-rings, unhook two springs, and remove four bushings and two gears to remove the Synchroniz- ing Rollers.
  • Page 78 2-8. Removal of the Paper Take-Up Roll 1. Slide out the 1st Cassette. 4108D038AA 2. Snap off one C-clip from the Paper Take-Up Roll Assy. 3. Slide the Paper Take-Up Roll Assy to the rear to remove it from the front bushing. 4108D039AA 4.
  • Page 79 E: ADJUSTMENTS...
  • Page 80 ADJUSTMENT OF THE PRINT START POSITION IN SUB-SCAN- NING DIRECTION ] When Control Board PWB-A has been replaced, the print start position in the sub-scanning direc- tion must be adjusted. 1. Remove the Access Cover, Upper Cover, and Control Leading Edge of Paper Board Reinforcement Box.
  • Page 81 F: TROUBLESHOOTING...
  • Page 82 MALFUNCTION RECOV- 1-1. The Printer Won’t Start. Symptom Analysis Action The printer won’t start. Plug in another electrical Faulty power outlet. appliance and see if it is To next step. started. Check the power cord for Defective power cord. continuity. To next step.
  • Page 83 1-3. Image Quality Problems Symptom Analysis Action Faulty image Does the symptom occur Check the connection even in a test print? between the printer and computer. If it is intact, the application or printer driver is probably faulty. The printer feeds out Turn OFF the printer during Defective image transfer blank sheets of paper.
  • Page 84 1-4. Tech. Rep. Call Symptom Analysis Action FATAL ERROR 1 Is the problem gone when To next step. the power is turned OFF, then ON? Reinstall ROM. To next step. Replace ROM. Replace the controller board. FATAL ERROR 2 Is the problem gone when To next step.
  • Page 85 Symptom Analysis Action FATAL ERROR 9 Is the problem gone when To next step. the power is turned OFF, then ON? Remove the network card To next step. from, and reinstall it to, the controller board. Replace the network card. Replace the controller board.
  • Page 86 Symptom Analysis Action FATAL ERROR 27 Is the problem gone when To next step. the power is turned OFF, then ON? Check the connectors and To next step. wiring between PWB-A and printer head unit. Replace PWB-A. Replace the printer head unit.
  • Page 87 Symptom Analysis Action FATAL ERROR 33 Replace the Fusing Unit FUSER 3 (defective Fusing Ther- mistor). FATAL ERROR 34 Remove I/C, clean the con- To next step. tact, and reinstall the I/C. Replace I/C. Replace PWB-A.
  • Page 88 MALFUNCTION DETEC- TION NOTE The printer detects the following malfunctions. When it detects any of these malfunctions, all ele- ments are brought to an immediate stop except the fan motor. 2-1. Misfeed Detection Conditions JAM1 (Paper take-up misfeeds) • The Synchronizing Sensor is not activated after the lapse of a given period of time even with two paper take-up retry sequences performed during paper take-up from the Multipurpose Tray.
  • Page 89 JAM5 (Paper Separator misfeeds) • The Paper Exit Sensor is not activated even after the lapse of a given period of time after the Syn- chronizing Sensor has been activated. • The Synchronizing Sensor is not deactivated even after the lapse of a given period of time after it has been activated.
  • Page 90 Copyright 1999 MINOLTA Co., Ltd. Printed in Japan Use of this manual should be strictly supervised to avoid disclosure of confidential information. MINOLTA Co., Ltd. 4108-7991-11 990XXXXX 10794...