Ricoh VT3500 Service Manual
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Ricoh VT3500 Service Manual

Ricoh VT3500 Service Manual

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CONTENTS
1. SPECIFICATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
2. GUIDE TO COMPONENTS AND THEIR FUNCTION . . . . . . . . . . . . 1-4
3. OPERATION PANEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
4. PRINTING PROCESS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10
5. MECHANICAL COMPONENT LAYOUT . . . . . . . . . . . . . . . . . . . . . 1-11
6. ELECTRICAL COMPONENT LAYOUT . . . . . . . . . . . . . . . . . . . . . . 1-12
7. ELECTRICAL COMPONENT DESCRIPTIONS . . . . . . . . . . . . . . . . 1-16
8. DRIVE LAYOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21

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  • Page 1: Table Of Contents

    CONTENTS 1. OVERALL MACHINE INFORMATION 1. SPECIFICATION......... 1-1 2.
  • Page 2 CONTENTS 2. SECTIONAL DESCRIPTION 1. MASTER EJECT SECTION ....... . 2-1 1.1 OVERALL .
  • Page 3 4.4 PAPER SEPARATION MECHANISM ....... . 2-42 4.5 SEPARATION ROLLER PRESSURE RELEASE MECHANISM ... . 2-45 4.6 SEPARATION PLATE PRESSURE RELEASE MECHANISM.
  • Page 4 7.3 VACUUM UNIT DRIVE MECHANISM ....... . 2-80 7.4 PAPER EXIT PAWL AIR PUMP MECHANISM ......2-81 7.5 WING GUIDE MECHANISM.
  • Page 5 10. OTHERS ..........2-141 10.1 INTERLOCK SWITCH .
  • Page 6 CONTENTS 3. INSTALLATION 1. INSTALLATION REQUIREMENTS ......3-1 1.1 ENVIRONMENT ..........3-1 1.2 ACCESS TO THE MACHINE .
  • Page 7 CONTENTS 4. SERVICE TABLES 1. SERVICE TABLES ........4-1 1.1 MAINTENANCE TABLES .
  • Page 8 2.6 USER CODE MODE..........4-27 2.6.1 User Codes .
  • Page 9 CONTENTS 5. REPLACEMENT AND ADJUSTMENT 1. EXTERIOR SECTION ........5-1 1.1 EXTERIOR COVERS .
  • Page 10 5.2 ADJUSTING THE MASTER EJECT SOLENOID ......5-24 5.3 ADJUSTING THE AIR KNIFE MOTOR SAFETY SWITCH ....5-25 5.4 MASTER EJECT UNIT .
  • Page 11 8. DRUM SECTION........5-56 8.1 ADJUSTING THE MAIN DRIVE BELT TENSION .
  • Page 12 CONTENTS 6. TROUBLESHOOTING 1. ELECTRICAL COMPONENT TROUBLE..... . 6-1 2. TROUBLESHOOTING ........6-5 2.1 IMAGE TROUBLE .
  • Page 13 CONTENTS 7. ELECTRICAL DATA 1. INK DETECTING CIRCUIT....... . . 7-1 2.
  • Page 14 CONTENTS 8. TAPE MARKER 1. SPECIFICATIONS ........8-1 2.

  • Page 15: Overall Machine Information

    SECTION 1 OVERALL MACHINE INFORMATION...

  • Page 16: Specification

    1 December 1993 1. SPECIFICATIONS Configuration: Desk top Master Processing: Digital Printing Process: Fully automatic one drum stencil system Original Type: Sheet Original Size: Maximum 307 mm x 432 mm (12.0" x 17.0") Minimum 90 mm x 140 mm (3.6" x 5.5") Reproduction Ratios: LT version 93%, 77%, 74%, 65%...
  • Page 17 1 December 1993 Power Consumption: 110 V, 60 Hz, 385 W (for Taiwan) 120 V, 60 Hz, 385 W (for N.A.) 220/240 V, 50/60 Hz, 443 W (for Eu., Asia) Weight: 110 V version: 110 kg (242.5 lb) 120 V version: 110 kg (242.5 lb) 220/240 V version: 116 kg (255.7 lb)
  • Page 18 1 December 1993 Paper Table Raising/ 22 mm/sec (50 Hz) Lowering speed: 26 mm/sec (60 Hz) Ink Supply: Automatic ink supply system 13 ± 1 kg Press Roller Pressure: Paper Delivery: Air knife/vacuum delivery Delivery Side Plate 80 mm to 327 mm (31.5" to 12.9") Movement distance: Print Counter: 7 digits...

  • Page 19: Guide To Components And Their Function

    1 December 1993 2. GUIDE TO COMPONENTS AND THEIR FUNCTION...
  • Page 20 1 December 1993 Name Function 1. Wing Guide Release Use to aid paper stack of large size paper. Lever 2. Paper Delivery Table Completed prints are delivered here. 3. Small Size Paper Use to align the leading edge of prints that are Delivery End Plate A4/LT or smaller.
  • Page 21 1 December 1993...
  • Page 22 1 December 1993 Name Function 16. Front Door Open for access to the inside of the machine. 17. ADF Unit Feeds the original to the scanning position automatically. 18. Original Tray Originals used to make master(s) are delivered to this tray. 19.

  • Page 23: Operation Panel

    1 December 1993 3. OPERATION PANEL – Keys and Indicators – 10 11 12 13 1. Reset key Press to reset error indicators. 2. Directional Press to enter the horizontal or vertical Magnification key magnification for copies, using the number keys. 3.
  • Page 24 1 December 1993 20 21 27 28 14. Clear Modes key Press to cancel all previously entered settings and modes. 15. Program key Press to input or recall user programs. 16. Enter key Press to input information into memory. 17. Counter Displays the number of prints entered.

  • Page 25: Printing Process

    1 December 1993 4. PRINTING PROCESS 1. Master Ejecting: Ejects the used master wrapped around the drum into the master eject box. 2. Original Feeding: Transports the original to the scanner section. 3. Scanning: Scans the original image with the CCD through the mirror and the lens while feeding the original.

  • Page 26: Mechanical Component Layout

    1 December 1993 5. MECHANICAL COMPONENT LAYOUT 1. Drum Unit 18. Ink Roller 2. Lens 19. Paper Exit Pawl Air Pump 3. CCD 20. Paper Exit Pawl 4. Reverse Roller 21. Transport Unit 5. Master Feed Roller 22. Paper Delivery Table 6.

  • Page 27: Electrical Component Layout

    1 December 1993 6. ELECTRICAL COMPONENT LAYOUT 1-13...
  • Page 28 1 December 1993 1. Original Registration Sensor 22. Transformer 2. 2nd Original Sensor 23. Paper Table Lower Limit Sensor 3. 1st Original Sensor 24. Main PCB 4. Original Transport Motor 25. Printing Pressure Sensor 5. Original Pressure Solenoid 26. Front Door Safety Switch 6.
  • Page 29 1 December 1993 44. Ink Supply Solenoid 54. Paper Feed Solenoid 45. Drum Lock Solenoid 55. AC Drive PCB 46. Master Eject Unit Safety Switch 56. Master Eject Clamper Solenoid 47. 2nd Drum Position Sensor 57. Image Position Sensor 48. Noise Filter 58.
  • Page 30 1 December 1993 65. Pressure Plate Motor 75. Reverse Roller Magnetic Clutch 66. Lower Pressure Plate Sensor 76. Cutter Motor 67. Upper Pressure Plate Sensor 77. Master End Sensor 68. Full Master Detection Sensor 78. Right Cutter Switch 69. Master Eject Sensor 79.

  • Page 31: Electrical Component Descriptions

    1 December 1993 7. ELECTRICAL COMPONENT DESCRIPTIONS Index No. Name Function Motors Original Transport Transports the original to the scanner Motor section. Paper Return Motor Returns paper to the paper table when the paper table is lowered. Vacuum Fan Motor Provides suction so paper is held firmly on the transport belt.
  • Page 32 1 December 1993 Index No. Name Function Master Eject Opens the master clamper to eject the Clamper Solenoid master. Master Feed Opens the master clamper to clamp the Clamper Solenoid master. Master Eject Solenoid Presses the lower master eject roller against the drum surface.
  • Page 33 1 December 1993 Index No. Name Function Drum Master Informs the CPU if the master is on the Detection Sensor drum. Lower Pressure Informs the CPU if the pressure plate is Plate Sensor at the lower limit position. Upper Pressure Informs the CPU if the pressure plate is Plate Sensor at the upper limit position.
  • Page 34 1 December 1993 Index No. Name Function Drum Rotation Switch Informs the CPU to rotate the drum at 10 rpm. ADF Safety Switch Cuts the power line of the paper table drive motor off when the ADF is open. Master Eject Unit Cuts off the power line of the paper Safety Switch table drive motor when the master eject...
  • Page 35 1 December 1993 Index No. Name Function Counters Total Counter Keeps track of the total number of prints made. Others Fluorescent Lamp Stabilizes the power supplement to the Stabilizer fluorescent lamp. Transformer Steps down the wall voltage. Power Supply Unit Provides power for all DC components.

  • Page 36: Drive Layout

    1 December 1993 8. DRIVE LAYOUT 1. Reverse Roller Gear 11. Printing Pressure Gear 2. Image Position Motor 12. Idle Gear 3. Original Transport Motor 13. Idle Pulley 4. Master Eject Motor 14. Main Motor 5. Drum Drive Gear 15. Paper Table Drive Motor 6.

  • Page 37: Sectional Description

    SECTION 2 SECTIONAL DESCRIPTION...

  • Page 38: Master Eject Section

    1 December 1993 1. MASTER EJECT SECTION 1.1 OVERALL At the end of the printing cycle, the used master remains wrapped around the drum to prevent the ink on the drum surface from drying. When the Master Making key is pressed to make a new master, the used master is ejected from the drum.

  • Page 39: Master Eject Roller Rotating Mechanism

    1 December 1993 1.2 MASTER EJECT ROLLER ROTATING MECHANISM When the original is set and the Master Making key is pressed, the main motor starts turning at 30 rpm in reverse. So now the drum also turns in reverse (compared with the printing rotations). At this time, if the drum master detection sensor detects a master on the drum, the master eject motor [A] starts rotating.

  • Page 40: Master Eject Roller Drive Mechanism

    1 December 1993 1.3 MASTER EJECT ROLLER DRIVE MECHANISM The drum position is detected by the first [G] and second [H] drum position sensors. When the drum reaches its home position, the first drum position sensor [G] is activated by the interrupter [F] at the rear side of the drum. To eject the master, the drum turns in reverse (opposite to the printing direction).
  • Page 41 1 December 1993 When the A3/DLT drum is 109 degrees from the home position, the master eject solenoid [A] turns off, separating the lower first eject rollers [C] from the drum. When the ejected master passes between the upper and lower first eject rollers, the master eject sensor [B] is actuated.
  • Page 42 1 December 1993 Misfeed Indicator Lights Print key on First Drum Position Sensor 39° 18° Master Eject Solenoid 50° 50° Sensor ON Check 68° 70° Foward Drum Rotation Reverse Reverse Master Eject Sensor Master Eject Motor [Master Eject Misfeed Detection] The misfeed indicator for the master eject section blinks in the following cases: Case 1: The master eject sensor is not activated and the drum has turned...

  • Page 43: Master Eject Clamper Mechanism

    1 December 1993 1.4 MASTER EJECT CLAMPER MECHANISM When the drum rotates 306 degrees (in reverse) past the home position, the master eject clamper solenoid [A] turns on and lever [B] rotates counterclockwise as shown. This moves the cam [D] inside the drum. Drum rotation brings the clamper sector gear [E] against the cam [D].

  • Page 44: Pressure Plate Up/Down Mechanism

    1 December 1993 1.5 PRESSURE PLATE UP/DOWN MECHANISM [Pressure Plate Down] When the interrupter at the rear side of the drum interrupts the first drum position sensor (this means the end of the master eject process), the pressure plate motor [B] starts rotating. This drives gear [H] clockwise by means of gears [C], [D], [E], and [F].
  • Page 45 1 December 1993 [Pressure Plate Up] When the master has been wrapped around the drum in the master making process and the master cutter leaves the home position to cut the master, the pressure plate motor [B] starts rotating to raise the pressure plate. When the pressure plate motor [B] turns, the gear [C] is driven through the relay gears.

  • Page 46: Electrical Timing

    1 December 1993 1.6 ELECTRICAL TIMING First Drum Position Sensor Second Drum Position Sensor Main Motor Reversing 13° 30 rpm Main Motor Forwarding 30 rpm Master Eject Motor Master Eject Solenoid 306° Master Eject Clamper Solenoid 500 msec T1: When the Master Making key is 0°...
  • Page 47 1 December 1993 0° T3: When the drum rotates 306 degrees past the home position, the 306° master eject clamper solenoid is energized. T4: When the drum rotates 13 degrees past the drum home position, the 0° 13° drum stops rotating. 500 milliseconds later (the drum completely stops during this period), the master eject clamper solenoid is...

  • Page 48: Circuit

    1 December 1993 1.7 CIRCUIT Main PCB CN101 CN103 FU101 FU102 CN101 LED DRIVE Component In/Out Main PCB Description Name CN No. Signal Level Upper Pressure 101-23 Signal goes High when the pressure Plate Sensor [A] plate is at the highest position. Lower Pressure 101-26 Signal goes High when the pressure...

  • Page 49: Scanner/Optics Section

    1 December 1993 2. SCANNER/OPTICS SECTION 2.1 OVERALL A/D Conversion Thermal Head Image Proccessing Thermal Head Drive PCB Operation Panel Main PCB The first original [A] at the bottom of the stack on the original table is separated from the other originals by the original feed rollers [E] and the separation blade [B], and is fed onto the exposure glass [F].
  • Page 50 1 December 1993 [Light Source] A high frequency (15 kHz) fluorescent lamp [D] is used as a light source for high speed reading. The light is reflected at two angles using a mirror [F]. This prevents shadows from the edges of cut-and-paste originals from appearing on the original [B].
  • Page 51 1 December 1993 Fluorescent Lamp CN608 +24V 4.3K TH601 110K Q602 CN601 Original -A13 Scanning Q605 Signal Lamp Heater A/D Conversion PCB Main PCB [Lamp Heater] The thermistor [C] mounted in the lamp heater maintains the lamp temperature at about 40°C. If the lamp temperature drops too low, the voltage at [B] goes High.
  • Page 52 1 December 1993 [Lens] The lens assembly [B] consists of 6 lenses to transfer the image to the photoelectric elements of the CCD. It is possible to adjust the focus by moving the lens assembly. [Shading Plate] Compared with the ends, the middle of the lamp is too bright. To correct this, a shading plate [A] is placed in front of the lens.

  • Page 53: Original Feed Mechanism

    1 December 1993 2.2 ORIGINAL FEED MECHANISM [J]: Fluorescent Lamp [K]: Exposure Glass [L]: 2nd Original Transport Rollers Two original feed modes can be selected by the ADF ON/OFF select switch. [ADF Mode] The originals [A] set on the original table are detected by the 1st original sensor [E].

  • Page 54: Original Feed Drive Mechanism

    1 December 1993 2.3 ORIGINAL FEED DRIVE MECHANISM [I] [H] The original transport rollers [A] are driven by the original transport motor [C], which is a stepper motor. The original feed rollers [B] are driven by the ADF drive motor [F] (dc motor) through a series of gears [G] to [L]. The pull-out rollers [E] are driven by the ADF motor through a drive belt [D].

  • Page 55: Original Size Detection

    1 December 1993 2.4 ORIGINAL SIZE DETECTION The original width detection plate [A] installed behind the rear original guide [B] has 4 photointerrupters. The front and rear original guides are adjusted according to the original width. Depending on which original size sensors are interrupted, the machine determines the original width as shown in the below table.
  • Page 56 1 December 1993 The machine also checks the paper size on the paper feed table (both the length and width). When the paper width is smaller than the original width (multiplied by the reproduction ratio), the machine indicates "Check paper size" on the operation display for 3 seconds when the Master Making key is pressed.

  • Page 57: Electrical Timing

    1 December 1993 2.5 ELECTRICAL TIMING Master Eject Process Master Making Process First Drum Position Sensor Second Drum Position Sensor First Original Sensor Master Motor Key 218.5° in Drum Rotation Main Motor Reversing Lamp On Signal 350 msec ADF Drive Motor Original Pressure Solenoid Second Original Sensor...
  • Page 58 1 December 1993 T2: When the Master Making key is pressed, the ADF drive motor starts rotating and the lowest original in the ADF unit is fed. At the same time, the original pressure solenoid is energized and the pressure plate presses the originals against the pull-out rollers.
  • Page 59 1 December 1993 [Electrical Timing for SADF Mode] Master Eject Process First Original Sensor Master Making Key Lamp On Signal ADF Drive Motor Original Pressure Solenoid Second Original Sensor 1 sec Original Transport Motor 6.5 mm 8.5 mm Original Registration Sensor 14 mm Scanning Signal...
  • Page 60 1 December 1993 [Electrical Timing for Image Shifting Mode] [Original] [Print] [Print] Original Feeding Direction The image is shifted in the sub-scanning direction by changing the start timing for the original feed or master feed. (In the main scanning direction, the image is shifted by changing the output timing of the image data in the image processing PCB.
  • Page 61 1 December 1993 [Master Making Process] Second Drum Position Sensor 218.5 in Drum Rotation Main Motor Reversing Original Registration Sensor 15.5 mm High Speed Original Transport Motor 20.5 mm 8.5 mm Master Feed Motor Original Scanning Signal 410 mm(Max.) Master Plotting Signal Plotting Signal Scanning Signal Start Position...
  • Page 62 1 December 1993 [Master Making Process] Second Drum Position Sensor Main Motor Reversing 218.5 in Drum Rotation Original Registration Sensor High Speed Original Transport 8.5 mm Motor Master Feed Motor Original Scanning 410 mm(Max.) Signal Master Plotting Signal 410 mm (Max.) Plotting Signal Scanning Signal Start Position...
  • Page 63 1 December 1993 [Master Eject Process] Master Making Key Lamp On Signal 3.5 sec Second Original 350 msec Sensor Original Registration Sensor Original Transport Motor 8.5 mm 6.5 mm Original Scanning Signal Plotting Signal Scanning Signal Start Position Start Position Shifting Range 15.5 mm 8.5 mm...

  • Page 64: Circuit

    1 December 1993 2.6 CIRCUIT Image Processing A/D Conversion Main PCB CN604 CN404 CN601 -a11 CN109-B11 CN402-A7 CN603 CN603 CN607-1 -b31 -A31 -b30 -A30 CN607 CN607-6 -a10 -B10 CN607-8 CN605-1 -a12 -B12 -a13 -B13 -B10 -B14 -a10 -a14 -A10 -B15 -b10 -a15 Original...
  • Page 65 1 December 1993 Component In/Out A/D Conversion PCB Description Name CN No. Signal Level Fluorescent 601-b7 Signal goes High when the lamp on 3.5V Lamp [A] signal turns on. Fluorescent 604-3 Signal goes Low when the lamp on 1.5V Lamp [A] signal turns on.

  • Page 66: Master Feed Section

    1 December 1993 3. MASTER FEED SECTION 3.1 OVERALL The thermal head [B] burns the image (scanned by the CCD) on the master [A] as it is being fed to the drum [C]. The master is then clamped to and wrapped around the drum.

  • Page 67: Master Clamper Opening Mechanism

    1 December 1993 3.2 MASTER CLAMPER OPENING MECHANISM After the master eject process is finished and the interrupter [A] is positioned in the first drum position sensor [B], the main motor turns on and the drum starts rotating (30 rpm) in reverse (opposite to the printing direction). When the drum turns 160 degrees past the actuation position of the second drum position sensor [C], the cam [H] moves inside the drum and the master feed clamper solenoid [D] turns on.

  • Page 68: Master Feeding Mechanism

    1 December 1993 3.3 MASTER FEEDING MECHANISM [M] [L] The drum rotates 218.5 degrees past the second drum position sensor and stops. At this time, the magnetic clutch [A] behind the reverse roller [L] and the master feed motor [H] turns on. The rotation of the master feed motor [H] is transmitted to the platen roller [E] through the belt [G] and the gear/pulley [F].

  • Page 69: Master Wrapping Mechanism

    1 December 1993 3.4 MASTER WRAPPING MECHANISM When the magnetic clutch [B] is turned off, the reverse roller [A] stops. However, since the feed rollers [C] turn continuously, the master continues to be fed, causing the master to buckle. This buckle [E] is detected by the master buckle sensor [D].

  • Page 70: Cutter Mechanism

    1 December 1993 3.5 CUTTER MECHANISM After the master making process (plotting process) is finished, the master feed motor turns off and the cutter motor [A] starts turning. The cutter motor [A] starts turning in reverse (arrows) when the cutter holder [B] pushes the left cutter switch at the front (operation side) end of the cutter rail (cutter holder home position).

  • Page 71: Electrical Timing

    1 December 1993 3.6 ELECTRICAL TIMING First Drum Position Sensor Second Drum Position Sensor 218.5° in Drum Rotation Main Motor Reversing 15.5 mm Original Transport Motor Plotting Start Plotting Max. 21.5 mm Master Feed Motor 38 mm 40 mm 5 mm Reverse Roller Clutch 160°...
  • Page 72 1 December 1993 T3: When the drum rotates 58.5 0° degrees more, the drum master clamper is completely open, and the 80° drum stops. 58.5° 298.5° When the drum stops, the original 160° starts being fed. After the original 218.5° 240°...
  • Page 73 1 December 1993 When the master feed clamper solenoid is de-energized, the drum starts rotating forward (the printing direction) at 10 rpm to wrap the master around the drum. The drum pulls the master and straightens out the buckle. The drum stops when the buckle sensor is de-activated. Then the master again buckles since the master feed motor keeps on feeding the master.

  • Page 74: Circuit

    1 December 1993 3.7 CIRCUIT Main PCB CN108 CN108-13 FU101 +24V CN706 CN109 CN403 Master -B33 Feed Motor -B34 CN108 Image Processing Thermal Head Drive PCB CN108-5 CN104 CN103-6 Component In/Out Main PCB Description Name CN No. Signal Level Master Buckle 108-8 Signal goes High when the sensor Sensor [A]...

  • Page 75: Paper Feed Section

    1 December 1993 4. PAPER FEED SECTION 4.1 OVERALL This mechanism uses a center separation system, which consists of the separation plate [F], upper separation roller [B], and lower separation roller [E]. Because of the separation system, if a few sheets of paper are picked up from the paper stack (paper table) by the paper feed roller [A], only one sheet of paper is transported to the second upper feed roller [C] and second lower feed roller [D].

  • Page 76: Paper Feed Roller/Upper Separation Roller Mechanism

    1 December 1993 4.2 PAPER FEED ROLLER/UPPER SEPARATION ROLLER MECHANISM The sector gear [J], located on the non-operation side, rotates the paper feed roller [M] and the upper separation roller [A]. When the paper feed solenoid [G] turns on, the link [F] is pulled. When the cam roller [D] is positioned on top of the paper feed roller cam [C], the sector stopper [E] turns counterclockwise as a clearance is formed between the pin [I] and the stopper [E].

  • Page 77: Feed Roller Pressure Mechanism

    1 December 1993 4.3 FEED ROLLER PRESSURE MECHANISM Due to the weight of the feed roller assembly [C] the paper feed roller presses the paper stacked on the paper table. This is because the feed roller assembly rotates freely around its shaft [D]. The spring [A] applies tension to the feed roller assembly in the direction in which the paper feed roller is pulled up.

  • Page 78: Paper Separation Mechanism

    1 December 1993 4.4 PAPER SEPARATION MECHANISM Spring tension [F] holds the separation plate [G] against the upper separation roller. A rubber pad is on top of the separation plate to separate a few sheets of paper before they reach the lower separation roller. If too many sheets of paper are fed to the lower separation roller at the same time, the lower separation roller will maybe not separate the sheets, it can separate only two or three sheets of paper.
  • Page 79 1 December 1993 "E" [Fig. 2] [Fig. 1] "E" View from The lower separation roller [C] turns slightly (arrow Fig. 2) due to the one-way clutch bearings when paper passes through the roller. The lower separation roller [C] and its shaft [D] are slightly pushed down by the paper [B] when the upper separation roller [A] is feeding the paper.
  • Page 80 1 December 1993 The side pads [A] installed in the front and rear paper side guides prevent multiple feed. These are especially useful when thin paper is used. After adjusting the paper side plates to the proper paper width (so that they touch the paper lightly), move the front and rear side pad levers to the right.

  • Page 81: Separation Roller Pressure Release Mechanism

    1 December 1993 4.5 SEPARATION ROLLER PRESSURE RELEASE MECHANISM When printing is finished or a misfeed occurs, the paper table drive motor rotates for 500 milliseconds to lower the paper table. The paper on the paper table moves down from the paper feed roller [D] and the paper feed bracket [A] is pulled down by its own weight.

  • Page 82: Separation Plate Pressure Release Mechanism

    1 December 1993 4.6 SEPARATION PLATE PRESSURE RELEASE MECHANISM When the paper table starts going down, the separation plate release solenoid [A] is energized. The pressure release arm [D] turns clockwise, and the separation plate [C] moves down from the upper separation roller. This mechanism allows for easy removal of any paper caught between the upper separation roller and the separation plate.

  • Page 83: Paper Return Mechanism

    1 December 1993 4.7 PAPER RETURN MECHANISM Printing End or Paper Misfeed 500 msec Paper Table Drive Motor Paper Return Motor Forward 900 msec Paper Return Motor Reverse 1.2 sec Separation Plate Release Solenoid When the paper feed stops, there may still be some paper between the upper and lower separation rollers.

  • Page 84: Second Feed Roller Mechanism

    1 December 1993 4.8 SECOND FEED ROLLER MECHANISM [Drive Mechanism] The lower second feed roller [I] is driven by the sector gear [C] and the feed roller gear [E]. When the paper feed solenoid [G] turns on, the link [F] combined with the paper feed roller sector stopper [H] are pulled.
  • Page 85 1 December 1993 [Release Mechanism] The release mechanism does two things: it raises and lowers the upper second feed roller, and it activates the lower one. It also synchronizes these two steps. The mechanism is made up of several parts. First, a cam which transmits motion to a sector gear [F];...
  • Page 86 1 December 1993 When the cycle is halfway through, the sector gear has reached its maximum clockwise position. Now the upper roller touches the lower one and a pair of springs [A] apply tension at each end of the upper roller. Until now the lower roller has not turned.

  • Page 87: Paper Table Side Adjustment Mechanism

    1 December 1993 4.9 PAPER TABLE SIDE ADJUSTMENT MECHANISM The shaft [D] of the fine adjusting dial [F] is threaded. The inside of the sleeve [E] is also threaded. The sleeve is fixed to the paper table stay [B] through a bracket [A].

  • Page 88: Paper Table Up/Down Mechanism

    1 December 1993 4.10 PAPER TABLE UP/DOWN MECHANISM The paper table is raised and lowered by the paper table drive motor. The paper end sensor [E] (a reflective photosensor) is actuated when the paper is set on the paper table. When the Print Start key is pressed, the paper table drive motor [H] starts turning clockwise and the worm gear [G] also turns.
  • Page 89 1 December 1993 2-53...

  • Page 90: Paper Size Detection

    1 December 1993 4.11 PAPER SIZE DETECTION This machine uses two methods for detecting paper size. One method is used for the paper on the paper table, and the other is for the optional cassette. The machine determines the master plotting area based on the detected paper size and the original size (which is detected during the original scanning process).
  • Page 91 1 December 1993 [Paper Size Detection for Paper Table] The paper width detection plate [A] installed behind the front paper side guide [B] has several interrupters. The front and rear paper side guides are adjusted to the paper width. Depending on which paper width sensors [C] [D] [E] [F] (4 photointerrupters) are interrupted and whether the paper length sensor [G] (a reflective sensor) on the paper detection PCB is activated, the machine determines the paper size as shown in the below table.
  • Page 92 1 December 1993 [Cassette Paper Size Detection] [B] [C] [D] The machine determines the cassette size through the cassette size detection PCB [E]. The reed switches on this PCB are activated by magnets positioned on the back of the cassette. The magnets are positioned according to the paper size (the magnet position for each of size paper is described on the back of the cassette).

  • Page 93: Electrical Timing

    1 December 1993 4.12 ELECTRICAL TIMING Stop key ON Counter Reset Print key ON Paper Table Height Sensor 30 msec Paper Table Up Relay (Table up) 15 msec Paper Table Brake Relay 50 msec First Drum Position Sensor Second Drum Position Sensor Paper Feed Solenoid Transport Vacuum Motor Air Knife Motor...

  • Page 94: Circuit

    1 December 1993 Main PCB 4.13 CIRCUIT CN104-8 CN101-13 Paper Return Motor CN102-16 CN104-6 CN104-7 FU101 CN103-8 CN102-14 Paper CN103-23 Table CN102 CN903 CN901 CN105 Drive Delivery Table Motor SSR301 CN302-5 CN903 Paper Table CN503-16 CN903 SSR302 CN502-12 SSR303 CN501-4 AC-N CN303-2 AC-N...

  • Page 95: Printing Section

    1 December 1993 5. PRINTING SECTION 5.1 OVERALL In this section, the paper detecting feeler [A] detects whether paper is fed correctly to the second paper feed roller section or not. Only when the paper is correctly fed, printing pressure is applied (the press roller [B] touches the drum) to transfer the ink from the master to the printing paper.

  • Page 96: Paper Detecting And Printing Pressure On/Off Mechanism

    1 December 1993 5.2 PAPER DETECTING AND PRINTING PRESSURE ON/OFF MECHANISM <Rear View> <Front View> During the printing process, the main motor turns the gear [A] and pressure cam [B] clockwise. When the bearing of the pressure ON/OFF lever [C] reaches the top of the pressure cam [B], the paper detecting arm [D] separates from the pressure ON/OFF lever [C].

  • Page 97: Printing Pressure On/Off Mechanism For A4/Lt Drum

    1 December 1993 5.3 PRINTING PRESSURE ON/OFF MECHANISM FOR A4/LT DRUM When the A3/DLT drum is used, printing pressure is applied while the bearing [D] of the pressure ON/OFF lever [E] is on the bottom of the pressure cam [C]. Pressure is released while the bearing is on top of the cam. However, when the A4/LT drum is used, printing pressure should be released sooner because the master on the A4/LT drum is shorter than the master on the A3/DLT drum.

  • Page 98: Printing Pressure Release Mechanism

    1 December 1993 5.4 PRINTING PRESSURE RELEASE MECHANISM The pressure release solenoid [G] energizes to release the pressure ON/OFF lever [D] when the paper feed solenoid energizes during normal operation. If a jammed sheet of paper in the printing section presses down on the paper detecting feeler [A], the pressure ON/OFF lever [D] remains disengaged from the paper detecting arm [C].

  • Page 99: Circuit

    1 December 1993 Main PCB 5.5 CIRCUIT CN103 CN104 FU101 Component In/Out Main PCB Description Name CN No. Signal Level 5msec Printing 104-5 Activated when the sensor is 7.5V Pressure interrupted. Sensor [A] Print Counter [B] 103-3 Activated when the counter is energized.

  • Page 100: Drum Section

    1 December 1993 6. DRUM SECTION 6.1 OVERALL [A]: Doctor Roller [B]: Ink [C]: Ink Roller [D]: Press Roller [E]: Paper [F]: Drum In this section, ink is supplied from the ink cartridge and is applied to the ink roller uniformly. The ink is then transferred to the printing paper through the holes in the master.

  • Page 101: Drum Rotation Mechanism

    1 December 1993 6.2 DRUM ROTATION MECHANISM The main motor (DC motor) [J], located under the rear side plate, turns the drum either clockwise or counterclockwise through belt [G], then through gears [F] and [E], then belt [D], and pulley [C]. The drive mechanism uses helical gears because they turn more quietly.

  • Page 102: Drum Lock Mechanism 1

    1 December 1993 6.3 DRUM LOCK MECHANISM 1 [Fig. 3] [Fig. 2] [Fig. 1] When the drum unit is set in the machine, the arm [B] is pushed by the lock pin [D] until the top of the arm [B] is locked by the stopper [C]. The lock pin [D] is mounted on the front side plate of the main body.

  • Page 103: Drum Lock Mechanism 2

    1 December 1993 6.4 DRUM LOCK MECHANISM 2 To prevent the drum from rotating when the drum unit is slid out, the drum stopper [A] drops into the drum lock [B]. This secures the drum [D]. When the drum unit is put back, the front side plate of the main body [C] holds the drum stopper [A] out of the drum lock.

  • Page 104: Drum Lock Mechanism 3

    1 December 1993 6.5 DRUM LOCK MECHANISM 3 When the drum is pulled out, the drum stopper [B] drops in the hole (see above figure). This stops the drum unit from being pulled out any further. Now, if the operator pulls handle [A], the drum unit won’t fall out. When the operator pulls stopper release [D] in this direction (arrow), he pushes up drum stopper [B] to the level of drum rail cover [C].

  • Page 105: Drum Lock Mechanism 4

    1 December 1993 6.6 DRUM LOCK MECHANISM 4 The drum lock solenoid [B] activates when the drum is turning. If someone interrupts the printing cycle by opening a cover, then the drum will stop. If the drum does not stop in the home position, then the drum lock will stay on. The stopper lock arm [A] then locks the left stopper [C] in place.

  • Page 106: Ink Supply Mechanism

    1 December 1993 6.7 INK SUPPLY MECHANISM Ink is supplied from the ink cartridge [H] to the ink roller [M] by the ink pump [I] and then through 8 holes in the ink distributor [A]. Drum rotation is transmitted from gear [K] to gear [L], then to the gear of the spring clutch [G].

  • Page 107: Ink Kneading Mechanism

    1 December 1993 6.8 INK KNEADING MECHANISM 0.08 mm The ink kneading mechanism consists of the ink roller [C] and the doctor roller [B]. The ink roller [C] rotates with the drum and the doctor roller [B] insures that the ink goes evenly to the ink roller. The ink roller [C] rotates with the drum this way: the drum turns a gear [A], the gear [A] turns an idle gear [E], and the idle gear [E] turns the roller gear [D].

  • Page 108: Drum Master Detection

    1 December 1993 6.9 DRUM MASTER DETECTION The drum master detection sensor [A] is mounted on the drum rail and it detects whether a master is on the drum. When there is a master on the drum, the black seal [B] is covered and the sensor detects the light reflected from the master [C].

  • Page 109: Drum Type Identification

    1 December 1993 6.10 DRUM TYPE IDENTIFICATION 1 2 3 4 5 6 7 8 9 10 11 12 [View from the operation side] Terminal Numbers The machine identifies the drum type electrically. Depending on which terminal of the drum unit connector [A] is connected to, the corresponding indicator lights up on the operation panel as follows: Terminal Number Drum Type...

  • Page 110: Ink Detection

    1 December 1993 6.11 INK DETECTION D902 OUTPUT1 VR901 TP105 THRESHOLD D904 D903 OUTPUT2 CN104-20 CN002-2 -12V TRIGGER2 Main PCB -12V THRESHOLD2 CN002-1 C908 INK Detecting PCB Ink is present No ink is present (1) Standard Pulse (2) Detection Pulse (3) Output of CN902-2 [Ink Detection Circuit] The detecting pin [B] works like the electrode of a capacitor to detect...
  • Page 111 1 December 1993 20 drum rotations 2nd Drum Position Sensor No Ink Signal Ink Supply Solenoid No Ink Indication [Ink Detection Timing] T1: When there is no ink left on the ink roller and the no ink signal (output of CN002-2) is LOW, the ink supply solenoid turns on at the rising edge of the second drum position sensor signal.

  • Page 112: Circuit

    1 December 1993 6.12 CIRCUIT Main PCB (Drum Unit Connector) CN118 CN105-27 CN104-17 CN105-15 CN104-14 CN104-15 CN104-16 CN103-30 FU101 Common Detecting Common CN101-10 001-1 001-2 Roller 002-1 CN104-19 Doctor Roller LED Drive (Drum Unit 002-2 Frame) CN104-20 002-3 -12V -12V CN104-21 Ink Detection PCB Component...
  • Page 113 1 December 1993 Component In/Out Main PCB Description Name CN No. Signal Level Color Drum 104-14 Signal goes Low when the color drum is Detection [H] installed. (CN118-2 and -3 are shortened.) The Color Drum indicator will light. Drum Detection 104-15 Signal goes Low when the drum is installed.

  • Page 114: Delivery Section

    1 December 1993 7. DELIVERY SECTION 7.1 OVERALL [D]: Belt [F]: Vacuum Fan [G]: Press Roller [H]: Paper The exit pawl [C] and the air knife [B] separate the paper from the drum [A] and the vacuum fan [F] in the transport unit [E] pulls the paper against the belt [D] as the belt moves the paper to the delivery table.

  • Page 115: Exit Pawl Drive Mechanism

    1 December 1993 7.2 EXIT PAWL DRIVE MECHANISM The exit pawl [B] located in the center of the drum, guides the center of the printing paper. As the master clamper [A] approaches the exit pawl, the exit pawl moves away from the drum. When printing pressure is applied to the drum, the bearing of the pressure ON/OFF lever [H] comes to the bottom of the pressure cam [G] and the lever [H] turns counterclockwise.

  • Page 116: Vacuum Unit Drive Mechanism

    1 December 1993 7.3 VACUUM UNIT DRIVE MECHANISM The vacuum fan [E] holds the paper against the transport belts [D]. The transport belts move the paper to the delivery table. Wing guides [C] at each end of the vacuum unit helps keep the back side of the printing paper clean.

  • Page 117: Paper Exit Pawl Air Pump Mechanism

    1 December 1993 7.4 PAPER EXIT PAWL AIR PUMP MECHANISM The main motor [A] turns a gear [B] through idle gears, a belt and a shaft. The gear [B] rotates and drives the piston [C] back and forth. The piston moves forward and pushes a jet of air out through the nozzle [D]. This jet of air helps push down on the paper and separates it from the drum.

  • Page 118: Wing Guide Mechanism

    1 December 1993 7.5 WING GUIDE MECHANISM The wing guide[A] lifts up the sides of the paper as it exits the machine. This stiffens the paper so that the leading edge of thin paper will not sag and brush against the sheets on the delivery table. This prevents the ink on freshly printed sheets from being smeared.

  • Page 119: Paper Delivery Table

    1 December 1993 7.6 PAPER DELIVERY TABLE 7.6.1 Master Eject Unit Lock Mechanism The master eject open button [A] locks when the paper delivery table is closed. This lock mechanism functions as follows: As the paper delivery table is closed, the pin [B] located on the front side of the paper delivery table, pushes down on lever [C] which raises arm [D].

  • Page 120: Paper Delivery Table Angle

    1 December 1993 7.6.2 Paper Delivery Table Angle (Fig. 2) 10° slant (Fig. 3) level (Fig.1) closed There are two paper delivery table open positions. As the paper delivery table is lowered from the closed position (fig. 1), the pin [A] fixed to the table side frame moves forward and pushes the stopper [B] forward.

  • Page 121: Circuit

    1 December 1993 7.7 CIRCUIT CN103 CN101-2 FU101 [C] Delivery Table CN102-7 CN102-12 +26V CN107-8 From PSU [C] Paper Table Main PCB Component In/Out Main PCB Description Name CN No. Signal Level 1st Paper Exit TP101 Signal goes High when the paper is on Sensor [A] the sensor.

  • Page 122: Electrical Timing

    1 December 1993 7.8 ELECTRICAL TIMING Stop Key Counter "0" Cutter Motor ON Print Key ON 1st Drum Position Sensor 2nd Drum Position Sensor Cutter Motor Vacuum Fan Motor Air Knife Motor Paper Feed Solenoid Printing Pressure Sensor Main Motor Paper Table Height Sensor Paper Table Drive Motor T1: Cutter motor, vacuum fan motor, air knife motor and main motor turn on.
  • Page 123 1 December 1993 2-87...

  • Page 124: Image Positioning Section

    1 December 1993 8. IMAGE POSITIONING SECTION 8.1 OVERALL In image positioning mode, the image can be shifted 20 mm (5 mm steps) up or down on the page by pressing the forward or backward Image Position key on the operation panel. This rotates the first and second paper feed roller cam to change the paper feed timing in relation to the drum rotation timing.

  • Page 125: Image Positioning Mechanism

    1 December 1993 8.2 IMAGE POSITIONING MECHANISM When the forward Image Position key on the operation panel is pressed, the image positioning motor [A] turns and drives cam gear [B] clockwise through gears. The cam gear has a spiral track along which the lever [C] moves. When the cam gear turns clockwise, the pin of the lever [C] moves towards the outside of the cam gear and the lever turns clockwise.

  • Page 126: Circuit

    1 December 1993 8.3 CIRCUIT Main PCB CN104-22 CN103-1 Image Position (-1) Sensor Image Position Motor When the forward Image Position key is pressed, CN103-2 goes to 22 V and CN103-1 goes to 0 V, and the image positioning motor turns to advance the paper feed timing.
  • Page 127 1 December 1993 2-91...

  • Page 128: Image Processing

    1 December 1993 9. IMAGE PROCESSING 9.1 CCD (CHARGE COUPLED DEVICE) CCD PCB Conversion ODD CLOCK EVEN CLOCK 3 ms (5,120 Counts) LSYNC One Scanning Line ODD CLOCK EVEN CLOCK Dummy Effective Empty Dummy Pixels 32 Pixels Data 84 Pixels 4 5,000 ODD CLOCK EVEN CLOCK...
  • Page 129 1 December 1993 The light reflected from the original exposes the CCD (Charge Coupled Device). The CCD is a solid-state device similar to a photodiode array, but unlike a photodiode array, a CCD can read one complete scanning line at a time.

  • Page 130: A/D Conversion Pcb

    1 December 1993 9.2 A/D CONVERSION PCB 9.2.1 Overview Original A/D Conversion PCB Signal Inversion & Amplification Circuit To Image Processing 8 bit Converter +REF _ REF 8 bit Selector Shading PKHTM Distortion Memory 8 bit Peak PKHST Converter Hold Circuit VR(+) VR( ) Current/...

  • Page 131: Inversion And Amplification

    1 December 1993 9.2.2 Inversion and Amplification +12V VR601 6.8K TP603 CN602-4 Q601 IC629 2.2K IC640 -12V IC636 +12V C657 1.7V DCREST 1.7V 1.7V One Scanning Line Approx. 6V IC629-6 Approx. 1.7V V0 (TP603) 1.7V DCREST 14 pixels The analog signal (OS) from the CCD is output to the A/D conversion PCB. It is sent in the minus direction under the dc bias voltage (approximate 6 volts).

  • Page 132: A/D Conversion

    1 December 1993 9.2.3 A/D Conversion Original Image Processing Inversion & Amplification Conversion A/D Conversion PCB This system converts analog image data into digital form. It then alters the data to correct for image intensity distortions caused by uneven light intensity. The image data are inverted and amplified and then they are digitalized in an A/D converter.
  • Page 133 1 December 1993 Inversion & Image Processing Amplification Selector BAD 0 Reference Data BAD 1 +REF 8-bit (VH) BAD 2 Digital BAD 3 BAD 4 Signal _ REF BAD 5 BAD 6 1.7V (VL) BAD 7 A/D Converter 2. Before scanning the original, the white platen cover is scanned and this data is stored in memory as reference data.
  • Page 134 1 December 1993 4. The digitized pixel data are sent Data Pixel serially to the image processing Decimal PCB. For example, data "A" (70) BAD0 and "B" (255) are expressed in 8-bit BAD1 form and sent through the eight BAD2 terminals (BAD 0 to BAD 7) shown 8-bit BAD3...
  • Page 135 1 December 1993 9.2.4 Reference Data Correction [Overview] The reference data, which are used to digitalize the image data, are compensated by the following corrections: 1. The image data sent from the CCD do not exactly represent the image for the following reasons: •...
  • Page 136 1 December 1993 A/D Conversion PCB CCD PCB Inversion & Amplification Converter PKHTM Scanning Timing Peak Hold Plotting PKHST Selector Signal Circuit LSYNC Generator Clock Selector SHMRT Image Processing PCB LSYNC Scanning Plotting 5 lines SHMRT PKHST PKHTM Standard White Original Background Peak Hold Peak Hold...
  • Page 137 1 December 1993 [Peak Hold] 1. Standard White Peak Hold Before scanning the document image, the white platen cover is scanned. While the first five lines are scanned, the peak hold timing signal (PKHTM) turns off and so the switch [A] on the A/D conversion PCB turns on. This allows the V0 signal to reach the peak hold circuit.

  • Page 138: Reference Data Correction

    1 December 1993 To Image 8 bit Processing Image Data Converter 8 bit Selector +REF Shading PKHTM Distortion Memory 8bit PKHST Peak Hold Converter Circuit VR(+) VR( ) _ Current/ 1.7V Voltage SHMRT Converter [Reference Data Correction] 1. Shading Distortion Memory VPH-SW Memory 8-bit...
  • Page 139 1 December 1993 2. Shading Distortion Correction [Reference Data Waveform] While an original image is scanned, the VPH-OB shading distortion datum for each pixel Shading (100%) Memory Distortion is sent from memory to the D/A Data converter. The original background peak voltage (VPH-OB) is applied to the high reference voltage terminal VL (1.7V)
  • Page 140 1 December 1993 3. Original Background Correction VPH-OB (100%) VPH-OB (100%) VL (1.7V) VL (1.7V) 50 percent of the difference in voltage between the original background peak voltage (VPH-OB) and the black peak voltage (VL = 1.7 volts) is also applied to the current/voltage converter.

  • Page 141: Image Processing Pcb

    1 December 1993 9.3 IMAGE PROCESSING PCB 9.3.1 Overview 6-bit Binary 1-bit Magnification [Line Mode] Processor Slim 1 bit CN402 6-bit 6-bit & Command Gate Image Shift 6-bit 8-bit Correction Conversion Processor 1 bit Photo Data 6-bit Half-tone Compensation Processor Processor [Photo Mode] Selection...
  • Page 142 1 December 1993 In the photo mode, the 6-bit image data first go to the magnification and image shift processor. The 6-bit data are compensated and converted into 8-bit image data. This gives a 256 level grayscale used by the photo data compensation processor.

  • Page 143: Mtf Correction

    1 December 1993 9.3.2 MTF Correction [Image] Black [Ideal Signal] White Black [Actual Signal] Output White x 100 = MTF% When the original image is converted to electrical signals by the CCD, the signal deteriorates and contrast is reduced. This is because neighboring black and white parts of the image influence each other.
  • Page 144 1 December 1993 (b) Enlarged view of dot (a) Section of document 12 4 12 0 (c) Image data after (d) Print without MTF correction A/D conversion (threshold level: 32) Consider a small black point on a original as shown in the illustration (a) and (b).
  • Page 145 1 December 1993 The correction value in the sub-scanning direction can be changed by using SP mode no. 31. The correction values for each setting of SP no. 31 are as follows: –1/4 SP31-0: Low –1/8 –3/8 –3/8 –1/8 –1/4 –1/2 SP31-1: Standard –1/8 –3/8...

  • Page 146: Main Scan Magnification And Image Shift Processing

    1 December 1993 9.3.3 Main Scan Magnification And Image Shift Processing [80% Reduction] Scanned Data Points 1" 2" 3" 4" 5" 6" 7" 8" Calculated Data Points Reduced Image Data Points [140% Enlargement] Scanned Data Points Calculated Data 1" 2" 3"...
  • Page 147 1 December 1993 ST1 ST2 A4 Size Image Data Output Timing From Memory φ 8192 5120 Results [Image Shift] This model can reposition the image of the original by using the image shifting mode. The image position change in the sub- scanning direction is done by changing the timing of the original scanning or of the master plotting.

  • Page 148: Binary Processing

    1 December 1993 9.3.4 Binary Processing Output Output Black Threshold Level White Density Density Original Original Print Print [Threshold Level 24] [Threshold Level 16] The binary processor converts 6-bit image data to single-bit white or black data to send it to the thermal head. This processor is used only for the line mode.

  • Page 149: Photo Data Compensation Processing

    1 December 1993 9.3.5 Photo Data Compensation Processing Black Output (8-bit) White 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 White Input (6-bit) Black...
  • Page 150 1 December 1993 [Normal] [Light Tone] Output Output Normal Tone Input Input [Dark Tone] Output A: Darker 2 B: Darker 1 C: Normal Normal D: Lighter Tone Input The compensation ratio varies according to which image density and contrast are selected. For example when Darker 1 key is selected the output value of the image data is increased slightly (i.e.

  • Page 151: Half-Tone Processing

    1 December 1993 9.3.6 Half-tone Processing In photo mode, the 8-bit image data from the photo data compensation processor are converted into single-bit white or black data in the half-tone processor. This helps reproduce half-tone images (such as photographs). For half-tone images, this process works better than the binary process.
  • Page 152 1 December 1993 [Image Data] 1 pixel Threshold Input Level Level (Pixel) [Print] 0: White Pixel 255: Black Pixel In this model, the errors are distributed in three dimensions. The error is preferentially distributed to darker pixels in higher ratio and to lighter pixels in lower ratio.
  • Page 153 1 December 1993 Original Image Data for One CCD Element Output Data Waveform 1.7V [Moire] When the CCD scans an image made up of regular lines such as a resolution chart, the output image may have another regular pattern over the regular lines.
  • Page 154 1 December 1993 1 Dither Matrix Main Scan 1 Pixel Scan 10 12 [Image Data] [4 x 4 Dither Matrix] [Image Reappearance] All pixels’ values from The number shows Shaded pixels show 4-bit data are at 5. the threshold level black dots.
  • Page 155 1 December 1993 [Fine Screen] [Coarse Screen] 1/400 inch x 3 x √   2 inches x 6 x √   2 inches (100 Lines/inch) (50 Lines/inch) In this model a 12 x 12 dither matrix is used to convert 8-bit image data into single-bit data.

  • Page 156: Make-Up Processing

    1 December 1993 9.3.7 Make-up Processing [Line Mode] Magnification CN402 6-bit 6-bit 6-bit 1-bit & Binary Correction Image Shift Processing Conversion Processing Area 1 Selection Memory 1 CN403 Make-up Area 2 Circuit Circuit Area Memory 2 Area 3 Thermal Selector Head Area 4 Memory 3...
  • Page 157 1 December 1993 Command Sheet [Closed Line Method] Original Designated Area [Diagonal Line Method] Designated Area [Make-up Mode] A variety of editing functions can be selected in the make-up mode as follows: Step 1 Make command sheet(s) to designate the areas to be edited. The diagonal line method or closed area method can be used for a command sheet to designate areas.
  • Page 158 1 December 1993 Step 3 Select an appropriate command number for the outside of the designated areas using the number keys. Even if two or more command sheets are used at a time, only one command can be selected for all command sheets from four modes. (See the following table of modes for outside designated area.) Step 4 Set the command sheets and original in the ADF so that the...
  • Page 159 1 December 1993 [Modes for Designated Area(s)] The following commands are for the designated area(s). MODE SAMPLE COMMAND NO. Designated Area Command sheet / Original Print Closed Diagonal (closed area method) area line method method 1. Line mode Fn 1 Fn 11 2.
  • Page 160 1 December 1993 [Modes for Outside Designated Area(s)] The following commands are for the area outside the designated area(s). MODE SAMPLE COMMAND NO. Undesignated Area Command sheet / Original Print 1. Line mode Fn 1 2. Outline mode Fn 2 3.
  • Page 161 1 December 1993 [Background Patterns] The 40 background patterns shown below can be selected. 2-125...
  • Page 162 1 December 1993 2-126...
  • Page 163 1 December 1993 2-127...
  • Page 164 1 December 1993 2-128...
  • Page 165 1 December 1993 2-129...
  • Page 166 1 December 1993 [Recognition of Designated Area] How you enter the designated area will affect the final result, therefore refer to the following table when you make the command sheet. Item Typical Problems Preferred designated area Designated area Area recognized Form of the Serial pattern The designated...
  • Page 167 1 December 1993 Item Typical Problems Preferred designated area Designated area Area recognized Thickness of The thickness As the line of Mark with a line more than 1 mm of the line as the designated in width. designating follows: area is too thin, (More than 2 mm in 50% line.
  • Page 168 1 December 1993 Item Typical Problems Preferred designated area Designated area Area recognized Gap between When the gap Depending on Neighboring Image between the the original feed designated designated area condition 2 mm area and and neighboring (registration 2 mm neighboring image is too and skewing) or...

  • Page 169: Plotter

    1 December 1993 9.4 PLOTTER VHD Vcc GND 9.4.1 Overview Thermistor Pulse Generator CN705-26 CN704-11 MB 0 CN403-26 CN704-7 MB 1 CN703-10 ENR1 ENR2 Decoder ENR3 ENR4 Thermal Head Thermal Head Drive PCB Main PCB & Image Processing PCB A thin-film type thermal heating element is used by the thermal head. The thermal heating elements melt the over-coating and polyester film layers of the master according to the image signals for each pixel.
  • Page 170 1 December 1993 1 line 5120 LSYNC ENR 1 ENR 2 ENR 3 ENR 4 The power source (VHD) is supplied to the thermal head when the plotting signal turns on. When the plotting signal turns off, a relay (RA701) on the thermal head drive PCB cuts the power line.

  • Page 171: Thermal Head Description

    1 December 1993 9.4.2 Thermal Head Description Thermal Heating Element Switching Element 64-bit LATCH LATCH DATA 64-bit Shift Register VHD: Power source Vcc: Power source for ICs ENR 1 to 4: Signal for supplying VHD to each elements block LATCH 1 to 4: Signal to pick out data from the shift register for each elements block DATA 1 to 4:...
  • Page 172 1 December 1993 9.4.3 Thermal Head Drive CN704-1 CN403-16 Thermal Head Image Data DATA 4 CN705-16 Temperature Image Pixel CN704-5 Checking DATA 3 Data Decoder Circuit CN704-9 DATA 2 CN703-3 DATA 1 CN403-12 CN705-12 CN403-14 LSYNC CN705-14 CN704-4 ENR 1 CN704-8 Pulse Width ENR 2...
  • Page 173 1 December 1993 Thermal Head Drive PCB CN705-16 Memory 1 Image 1st Out put Data 2nd Out put Memory 2 R4608 1153 2305 3457 2304 3456 1152 4608 DATA 4 Block 4 Block 3 Block 2 Block 1 DATA 3 DATA 2 DATA 1 Thermal Head...
  • Page 174 1 December 1993 1 Line 5120 LSYNC 2nd Output 1st Output DATA 1 DATA 2 DATA 3 DATA 4 LATCH 1 LATCH 2 LATCH 3 LATCH 4 ENR 1 1st Block ENR 2 2nd Block ENR 3 3rd Block ENR 4 4th Block [Timing Chart] T1: When the first output data (the first half of DATA 1) for the first one block...
  • Page 175 1 December 1993 9.4.4 Thermal Head Protection CN705-22 CN404-b8 Thermistor CN703-10 CN403-22 CN109-A8 Thermal Head Image Processing Thermal Head Drive PCB CN502-10 CN107-9 Thermal Guard Main PCB A thermistor on the thermal head and a thermal guard (a thermostat) on the power supply unit are used for thermal head protection.

  • Page 176: Thermal Head Drive

    1 December 1993 Conditions Possible Cause SC Code The CPU detects 1) Defective thermal head drive PCB or an abnormal image processing PCB. condition in the 2) Disconnection of the related connector. E-10 pulse from the (Main PCB CN109-A7, image thermal head drive processing PCB CN404-b7/CN403-20, PCB (ENR 1 to 4).
  • Page 177 1 December 1993 10. OTHERS 10.1 INTERLOCK SWITCH Pull out the actuator [A] of the interlock switch [B] located inside of the inner cover to disable the front door, paper table, master eject unit, and scanner unit safety switches. The interlock switch remains activated as long as the actuator is pulled out.
  • Page 178 1 December 1993 10.2 MONITOR INDICATION 10.2.1 Cover Open Indicator Condition Guidance Display Message The drum has not been inserted all SET THE DRUM COMPLETELY the way into the machine. Front door is open, master eject unit is CLOSE THE COVER open, or original table (scanner unit) is open.
  • Page 179 1 December 1993 10.2.3 Master Eject Box Indicator Condition Guidance Display Message The master eject box is not set. SET THE MASTER EJECT BOX The master eject box is full. (When EMPTY MASTER the pressure plate is lowered, the full EJECT BOX master detection sensor does not turn on.)
  • Page 180 1 December 1993 10.2.5 Master Supply Indicator Condition Guidance Display Message Master paper is running out, or the LOAD NEW MASTER ROLL master roll is not set. NOTE: 1. When this indicator turns on, a new master cannot be made but prints can be made.
  • Page 181 1 December 1993 10.2.7 Master Eject Error Message Condition Guidance Display Message Master is not ejected. MASTER EJECT JAM REMOVE JAMMED MASTER The master eject sensor is ON when the main SW is turned on. NOTE: When the Reset key is pressed, if the master eject sensor is OFF, the jam indicator turns off.
  • Page 182 1 December 1993 B + E + 10.2.10 Paper Wrap Message 1 Condition Guidance Display Message 1st paper exit sensor does not turn PAPER WRAP JAM ON after printing pressure sensor REMOVE JAMMED PAPER turns on. Printing pressure sensor is on (printing pressure is applied) when the main SW is turned on.
  • Page 183 1 December 1993 10.2.13 Original Misfeed Indication Condition Guidance Display Message When the main SW is turned on, the ORIGINAL JAM 2nd original sensor or original REMOVE ORIGINAL registration sensor is ON. The original is not fed. During the master making process, cover is opened or Stop key is pressed while original is being fed.
  • Page 184 1 December 1993 10.2.14 Other Guidance Displays Condition Guidance Display Message When more than one command sheet is used in make-up mode: after a THE COMMAND SHEET/S command sheet is read, the following command sheet is not present on the original table.
  • Page 185 1 December 1993 10.2.15 Other Monitor Indications 1. If the original is not set on the original table when the Master Making key is pressed, "A" on the misfeed location indicator lights and "SET THE ORIGINAL" is displayed for 2 seconds. They then turn off and " READY TO START"...
  • Page 186 1 December 1993 10.3 MASTER PLOTTING AND PRINTING AREA Items Standard Note 1) Master plotting area [A3/DLT Drum: Length] changes according to paper size. A3 (=420 mm) 2) In enlarge or reduce mode, the 10 mm Original (407) margin is not enlarged Master Plotting Length or reduced.
  • Page 187 1 December 1993 Items Standard Note 1) Master plotting area [A4/LT Drum: Length] changes according to paper size. LT (=216 mm) 2) In enlarge or reduce Original (203) mode, the 10 mm Master Plotting Length margin is not enlarged Master or reduced.
  • Page 188 1 December 1993 Items Standard Note [A3/DLT Drum: Width] In enlarge or reduce A3 (=297 mm) mode, the center of the Original image does not shift. Master Plotting Width (292) Master Master Width (320) Screen Mesh Width (297.6) Screen Paper Image Width (=290) Maximum Image Width: 290 mm...
  • Page 189 1 December 1993 Items Standard Note [Master Plotting Length in Relation to Paper Size] The machine will not Original Length Lo (Max. 432) plot the last 2 mm of the original on the master. Original Master Plotting Length L (Max. 410) Master Master Plotting Length α...
  • Page 190 1 December 1993 10.4 PAPER MISFEED DETECTION 2nd Drum Position Sensor Paper Feed SOL [a] B + Printing Pressure Sensor [b] G + 2nd Paper Exit Sensor [a] When the 2nd drum position sensor turns on, if the printing pressure sensor is still OFF, the main PCB detects a paper misfeed.
  • Page 191 1 December 1993 10.5 PROTECTION FROM OVERCURRENT To protect solenoids and motors from overcurrent, 2 fuses are located in the 24 V line. CN107-7 CN104-17 FU101 +24V Ink Supply Solenoid CN103-30 Drum Lock Solenoid CN104-18 Separation Plate CN104-17 Release Solenoid CN104-6 FU102 CN103-23...
  • Page 192 SECTION 3 INSTALLATION...
  • Page 193 1 December 1993 1. INSTALLATION REQUIREMENTS 1.1 ENVIRONMENT The installation location should be carefully chosen because environmental conditions greatly affect the performance of a machine. Ideal conditions are: 1. Temperature Range: 10°C to 30°C (50°F to 86°F) 2. Humidity Range: 20% to 90% RH 3.
  • Page 194 1 December 1993 1.2 ACCESS TO THE MACHINE Place the machine near a power source, providing clearance as shown below. 10 cm (4.0") Paper Paper 70 cm Delivery Feed (27.6") Table Table More than 70 cm (27.6") More than More than 60 cm (23.7") 60 cm (23.7") 1.3 POWER SOURCE...
  • Page 195 1 December 1993 2. ACCESSORY CHECK Make sure that you have all the accessories listed below. A. Operation Instructing Cards ..............2 B. Original Exit Tray................... 1 C. Thermal Head Cleaner Set ..............1 C-1 Cleaner bottle................1 C-2 Replacement felt ................10 C-3 Cleaner pen...................
  • Page 196 1 December 1993 3. INSTALLATION PROCEDURE 3.1 MAIN BODY 1. Place the machine on the table. NOTE: The screw holes in the bottom plate of the machine must line up with the screw holes in the table. 2. Remove the strips of tape [A] securing the covers and units shown above. 3.
  • Page 197 1 December 1993 8. Raise the front side of the machine and position the base pad [A] under the machine. Then raise the rear side of the machine and position the other base pad [B] under the machine. 9. Secure the machine to the table with the two screws [C] packed with the table.
  • Page 198 1 December 1993 10. Install the original exit tray [A] while bending the side edges of the original exit tray as shown.
  • Page 199 1 December 1993 11. Open the paper feed table [A] and neatly stack the printing paper on the table. 12. Slide the paper feed side plates [B] lightly up against the paper stack. 13. Open the paper delivery table [C] and adjust the position of the end plate [D] and the side plates [E] according to the printing paper size.
  • Page 200 1 December 1993 15. Install the master roll. a. Slide the scanner unit all the way to the left. b. Attach a spool [A] to each end of the master roll [B]. c. Push the pressure release lever [C] to the left. d.
  • Page 201 1 December 1993 16. Distribute ink on the drum. a. Press the Reset key [A] while holding down the "0" key [B] on the operation panel. b. If blinks on the operation panel when the machine stops, press the Reset key again. 17.
  • Page 202 1 December 1993 3.2 PAPER CASSETTE 1. Loosen the 6 screws [A] securing the side fences [B] and the rear fence [C]. 2. Move the 3 fences to the desired paper size position and tighten the 6 screws. NOTE: The paper size positions are marked on the cassette.
  • Page 203 1 December 1993 3.3 COLOR DRUM UNIT Install the color drum unit according to the following procedure. 1. Open the drum case [A] and remove the red cushion. 2. Open the master clamper [B] and remove the paper [C] protecting the drum surface. 3.
  • Page 204 1 December 1993 4. Remove the drum unit [A] currently set in the machine. 5. Install the new color drum unit. NOTE: 1. Keep the removed drum unit in the drum case. 2. The color indicator on the operation panel lights to indicate that the color drum unit is installed.
  • Page 205 1 December 1993 3.4 KEY COUNTER 1. Remove the main switch cover [A] (4 screws). 2. Remove the key counter cover [B] and the fixing plate [C] (2 screws). 3. Hold the fixing plate [C] in position inside the key counter bracket and insert the key counter holder [D].

  • Page 206: Service Tables

    SECTION 4 SERVICE TABLES...

  • Page 207: Maintenance Tables

    1 December 1993 1. SERVICE TABLES 1.1 MAINTENANCE TABLES 1.1.1 Lubrication Points Lubricate after removing adhering ink and paper dust at yearly interval. Section Lubrication Point Type Location Drive Speed Reduction Gears Grease (Shell (Fig.1- E) of the Main Motor Albania No.
  • Page 208 1 December 1993 Section Lubrication Point Type Location Master Eject Master Pressure Plate Grease (Shell Both front side Grooves Albania No. 2) and rear side (Fig.5- S) Edges of the Master (Fig.5- R) Pressure Plate Drive Arms Paper Exit Air Pump Drive Gears (Fig.6- T) Inside of the Air Pump Grease (Mobil...
  • Page 209 1 December 1993 [Fig 4] [Fig 5] [Fig 6] [Fig 7]...

  • Page 210: User's Maintenance

    1 December 1993 1.1.2 User’s Maintenance Advise the customer to clean each item regularly. Clean the following items at every EM call if necessary. Section Cleaning Point Cleaner Interval Optics Original Platen Cover Cloth and water Exposure Glass Cloth and glass cleaner Paper Feed Paper Feed Roller Cloth and soap and At every...
  • Page 211 1 December 1993 Master Eject Upper and Lower Wipe off the ink and paper powder Master Eject Rollers using a cloth damped with ethyl alcohol. Master Eject Box Wipe off the ink using a cloth damped with ethyl cohol. Drum Inside and outside of Wipe off the built up ink and paper Drum...

  • Page 212: Table Of Service Call Indications

    1 December 1993 1.2 TABLE OF SERVICE CALL INDICATIONS Indication Trouble Possible Causes E-01 Neither the right nor the left 1) Drive wire cut cutter switch turns off within 3 2) Drive section seconds of the cutter motor malfunction starting. 3) Defective cutter switch E-02 Malfunction in the paper table...
  • Page 213 1 December 1993 Indication Trouble Possible Causes E-10 The CPU detects an abnormal 1) Defective thermistor condition in the pulse from the 2) Related connectors thermal head drive PCB (ENR 1 are not connected. to 4). This pulse determines the (Main PCB CN109-A7, energy applied to the thermal image processing...

  • Page 214: Table Of Dip Sw, Led, Vr, Tp (On The Main Control Pcb)

    1 December 1993 1.3 TABLE OF DIP SW, LED, VR, TP (ON THE MAIN CONTROL PCB) 1.3.1 DIP SW No. DIP SW Function Remarks DIP SW101 — Not used. Must be OFF. 1.3.2 Photodiode No. LED Component Remarks LED101 1st Paper Exit Sensor When a paper is detected, the LED lights.
  • Page 215 1 December 1993 1.3.4 TP No. TP Function Standard Voltage TP101 1st Paper Exit Sensor Voltage ON: More than 2 V OFF: 0.9 V TP102 Drum Master Detection ON: More than 2 V Sensor Voltage OFF: 0.9 V TP103 2nd Paper Exit Sensor Voltage ON: More than 2 V OFF: 0.9 V TP104 Master Eject Sensor Voltage...

  • Page 216: Expected Life Of Parts

    1 December 1993 1.4 EXPECTED LIFE of PARTS Section Part Description Expected Life Scanner Fluorescent Lamp 15,000 originals 1st and 2nd Lower 1 year or 6,000 originals Original Transport Rollers Plotter/Master Feed Thermal Head 30,000 masters Platen Roller 30,000 masters Upper Master Feed Roller 1 year or 6,000 masters Drum Drum Tetron Screen...

  • Page 217: Service Program Mode

    1 December 1993 2. SERVICE PROGRAM MODE 2.1 SERVICE PROGRAM MODE OPERATION The service program (SP) mode is used to check electrical data and change modes or change adjustment values. 2.1.1 Service Program Mode Access Procedure (for engineers) All service program modes can be accessed with this procedure. 1.

  • Page 218: Change Adjustment Values Or Modes

    1 December 1993 2.1.3 Change Adjustment Values or Modes 1. After entering the desired SP mode number, press the Enter key. The value or mode set at the factory will be displayed on the LCD (at the end of the second line). 2.

  • Page 219: Service Program Table

    1 December 1993 2.2 SERVICE PROGRAM TABLE *: Accessible by a customer ♥: A4 version ♦: LT version Display Function Data Factory Comments Setting On line Enables on line 0: No Not used operation. 1: Yes FDC Type 10 Enables FDC 0: No Not used operation.
  • Page 220 1 December 1993 Display Function Data Factory Comments Setting *17. A3 → B4 ♥: 87% Adjusts fixed 50 to 200% ♦: 77% magnification ratio. Mag. Ratio A4 version: From A3 to B4 LT version: From 8 " x 14" to "...
  • Page 221 1 December 1993 Display Function Data Factory Comments Setting *41. Image Density Specifies the image 0: Light density at power on. 1: Standard 2: Dark 3: Darker Print Speed Specifies the printing 0: 40 rpm speed at power on. 1: 60 rpm 2: 80 rpm 3: 100 rpm 4: 120 rpm...
  • Page 222 1 December 1993 Display Function Data Factory Comments Setting Paper Feed Displays the total Jam (B) number of paper feed jams. Paper Wrap Displays the total Jam (E)/(B)/(E) number of times that paper has wrapped around the drum. Paper Displays the total Delivery Jam number of paper delivery jams.
  • Page 223 1 December 1993 Display Function Data Factory Comments Setting 101. Make-Up Displays the total Count number of masters made in make-up mode. 102. Make-Up Displays the total Photo Count number of masters made in make-up photo mode. 103. Diagonal Shift Displays the total Count number of masters...
  • Page 224 1 December 1993 Display Function Data Factory Comments Setting *114. CLR Reset Clears the resetable 0: No table Count total master/print 1: Yes counter. *120. User Code Selects user code 0: No See user-code Mode mode. 1: Yes mode section. *121.
  • Page 225 1 December 1993 Display Function Data Factory Comments Setting 146. ADF Cover Specifies whether the 0: No Detection ADF safety switch is 1: Yes effective. 150. Control ROM Displays the ROM 1990 / 10 / 07 part number and the Year Month Day ROM manufacturing date.

  • Page 226: Thermal Head Test

    1 December 1993 2.3 THERMAL HEAD TEST This function is used to determine which printer component is causing an image problem on the master. In this mode, the background pattern that is printed covers the entire sheet of paper. <Procedure> 1.

  • Page 227: Command Sheet Check

    1 December 1993 2.4 COMMAND SHEET CHECK Normally, Fn 9 or Fn 19 cannot be input in Make-up mode. By changing the data of SP mode #91 from 0 to 1, Fn 9 or Fn 19 can be input. Command No. Display Function Fn 9...

  • Page 228: Input/Output Check Mode

    1 December 1993 2.5 INPUT/OUTPUT CHECK MODE This program checks electrical components. The procedure for accessing the program is as follows: 2.5.1 Input Check Mode Access Procedure 1. Access SP mode. (See the SP mode access procedure.) 2. Enter 130 (SP mode number) with the number keys. 3.

  • Page 229: Input Check Table

    1 December 1993 2.5.3 Input Check Table Code LCD Display Component Checked SW: ADF Cover ADF Safety Switch. In- 1 SN: 1st Original First Original Sensor. In- 2 SN: 2nd Original Second Original Sensor. In- 3 SN: 3rd Original Original Registration Sensor. In- 4 SN: Original Size 0 Original Size Sensor –...
  • Page 230 1 December 1993 Code LCD Display Component Checked SW: Right Cutter Right Cutter Switch. In-23 SW: Left Cutter Left Cutter Switch. In-24 SN: Master Buckle Master Buckle Sensor. In-25 SN: Master End Master End Sensor. In-26 SIG: Ink When Ink Detecting Pin detects ink. In-27 SIG: Color Drum When color drum is set.

  • Page 231: Output Check Table

    1 December 1993 2.5.4 Output Check Table Code LCD Display Description SOL: ADF Original Turns on the ADF original pressure solenoid. Pressure Out- 1 MOTOR: ADF Drive Turns on the ADF drive motor. Out- 2 MOTOR: Master Eject Turns on the master eject motor. Out- 3 MOTOR: Pressure Turns on the pressure plate up/down motor.
  • Page 232 1 December 1993 Code LCD Display Description MOTOR: Cutter + Turns on the cutter motor (moves it to the rear of the Direction Out-22 machine). MOTOR: Cutter – Turns on the cutter motor (moves it to the front of the Direction Out-23 machine).
  • Page 233 1 December 1993 2.6 USER CODE MODE 2.6.1 User Codes With the user code function, operators must input an authorized code before the machine will operate. The machine keeps track of the number of prints made under each code. There are 20 user codes as follows: User Code No.

  • Page 234: Replacement And Adjustment

    SECTION 5 REPLACEMENT AND ADJUSTMENT...

  • Page 235: Exterior Section

    1 December 1993 1. EXTERIOR SECTION 1.1 EXTERIOR COVERS When adjusting or disassembling each section, refer to the following procedures on how to remove exterior covers. [A] Right Cover (5 screws) [B] Right Front Cover: open the front door, loosen the 2 screws [G], remove the 2 screws [H].
  • Page 236 1 December 1993 Good Not Good [I] A/D Conversion PCB Cover: open the operating instruction cover [J] and remove 1 screw. [K] Original Table: remove the 7 screws. NOTE: When installing the original table, make sure both original guides [L] are set in the same position in the grooves (see illustrations).

  • Page 237: Scanner Section

    1 December 1993 2. SCANNER SECTION 2.1 ADJUSTING THE TENSION OF THE ORIGINAL FEED ROLLER DRIVE BELT Purpose: To ensure that the originals are fed properly. Adjustment Standard: 2 to 3 mm 1. Slide the scanner unit to the left. 2.

  • Page 238: Adjusting The Original Pressure Solenoid

    1 December 1993 2.2 ADJUSTING THE ORIGINAL PRESSURE SOLENOID 6.0 ∼ 6.5 Purpose: To ensure that the originals are separated properly. Adjustment Standard: 6.0 to 6.5 mm 1. Remove the screw securing stopper [A]. 2. Remove the separation guide plate [B] (4 screws). 3.

  • Page 239: Exposure Glass

    1 December 1993 2.3 EXPOSURE GLASS 1. Move the scanner unit to the left. 2. Open the ADF unit [A]. 3. Remove both fluorescent lamp covers. 4. Remove both exposure glass leaf springs [B]. 5. Carefully remove the exposure glass [C].

  • Page 240: Exposure Lamp/Heater

    1 December 1993 2.4 EXPOSURE LAMP/HEATER 45° 1. Move the scanner unit to the left. 2. Remove the front fluorescent lamp cover. 3. Disconnect the 4P heater connector. 4. Remove the front fluorescent lamp holder [A] (2 screws). 5. Carefully remove the fluorescent lamp [B] so that it does not touch the exposure glass.

  • Page 241: Original Registration Sensor/2Nd Original Sensor

    1 December 1993 2.5 ORIGINAL REGISTRATION SENSOR/2ND ORIGINAL SENSOR 1. Remove the exposure glass. (See Exposure Glass section.) 2. Remove the screw supporting the locking arm. 3. Remove the guide plate [A]. 4. Disconnect the original registration sensor connector [B]. 5.

  • Page 242: Original Feed Rollers/Pull-Out Rollers

    1 December 1993 2.6 ORIGINAL FEED ROLLERS/PULL-OUT ROLLERS 1. Remove the original table (7 screws) and open the ADF unit. 2. Replace the pull-out rollers [A] (1 snap ring, 1 pin). 3. Remove the E-rings at both ends of the feed roller shaft [B]. 4.

  • Page 243: Optics Section

    1 December 1993 3. OPTICS SECTION 3.1 OVER VIEW Double check all optical component adjustments, because these adjustments influence each other. The following table shows the reciprocal relationship between adjustment procedures. The "O" indicates those items that must be checked (check items) after an item in the left column (adjustment item) is adjusted.
  • Page 244 1 December 1993 Oscilloscope Test pin Channel 1 TP603 (CH1) Channel 2 TP602 Trigger (CH2) TP601 [Preparation for Adjustment] 1. Remove the A/D conversion PCB cover [A] (1 screw). 2. Connect the terminals of the oscilloscope to the following test pins on the A/D conversion PCB.

  • Page 245: Adjusting The Reduction Ratio (Moire Adjustment)

    1 December 1993 3.2 ADJUSTING THE REDUCTION RATIO (MOIRE ADJUSTMENT) Cross Points Cross points must be less than 33. Purpose: To adjust the focus (to set distance between the lens and the original). Adjustment Standard: There must be 32 cross points or less. 1.

  • Page 246: Adjusting The Focus (Mtf Adjustment)

    1 December 1993 3.3 ADJUSTING THE FOCUS (MTF ADJUSTMENT) a−b x 100 ≥ 60% RESOLUTION CHART 200DPI Purpose: To adjust the focus distance between the CCD and the lens. Ajustment Standard: a−b x 100 ≥ 60 % 1. Position the resolution chart so that the 200 dpi area on the test chart can be read.

  • Page 247: Adjusting The Reading Start Position In The Main Scan

    1 December 1993 3.4 ADJUSTING THE READING START POSITION IN THE MAIN SCAN DIRECTION 16 mm Purpose: To align the center of the original with the center of the CCD. This will center the image on the master. Adjustment Standard: L1 – L2 is less than 6 µs. 1.

  • Page 248: Adjusting The Scan Line Position

    1 December 1993 3.5 ADJUSTING THE SCAN LINE POSITION 16 mm 1 mm Black Line Test Chart R21 Purpose: To ensure that the CCD alignment is perpendicular to the original feed direction. Adjustment Standard: See the above illustration. 1. Set the test chart so that the black line is positioned 16 mm away from the edge of the lower original guide plate.

  • Page 249: Adjusting The Shading Plate

    1 December 1993 3.6 ADJUSTING THE SHADING PLATE Down D > 0.6 C C < 1.0 V E < 3 ms • The middle of the waveform should be higher than the ends. Purpose: To correct light intensity distortion properly. Adjustment Standard: See the above illustration.

  • Page 250: Adjusting The White Level

    1 December 1993 3.7 ADJUSTING THE WHITE LEVEL 2.0 V ± 0.1 V Purpose: To set the white level so that the background of the test chart is not copied. Adjustment Standard: 2.0 V ± 0.1 V 1. Close the ADF unit. 2.

  • Page 251: Master Feed Section

    1 December 1993 4. MASTER FEED SECTION 4.1 ADJUSTING THE THERMAL HEAD VOLTAGE Purpose: To maintain quality when making masters and to extend the lifetime of the thermal head. Adjustment Standard: Refer to the voltage value (X) on the thermal head decal of each machine.

  • Page 252: Adjusting The Belt Tension

    1 December 1993 4.2 ADJUSTING THE BELT TENSION 1.2 ∼ 1.8 mm Purpose: To ensure that proper rotation for the master feed is transmitted to each roller. Adjustment Standard: 1.2 to 1.8 mm 1. Lower the paper table [A]. 2. Remove the plotter unit cover (5 screws). 3.

  • Page 253: Adjusting The Right And Left Cutter Switches

    1 December 1993 4.3 ADJUSTING THE RIGHT AND LEFT CUTTER SWITCHES Purpose: To ensure that the cutter slider stops properly. Adjustment Standard: Confirm that the cutter holder activates the switches. 1. Remove the cutter unit. (See Cutter section.) 2. After moving the cutter holder [A] fully to the left, make sure that the left cutter switch [B] is turned on.

  • Page 254: Cutter

    1 December 1993 4.4 CUTTER NOTE: Be careful not to damage the thermal head. 1. Lower the paper table. 2. Remove the plotter unit. (See Adjusting the Belt Tension section.) 3. Remove the platen roller [A]. 4. Remove the cutter unit cover [B] (2 screws). 5.

  • Page 255: Thermal Head

    1 December 1993 4.5 THERMAL HEAD 1. Slide the scanner unit to the left. 2. Remove the platen roller and remove the master roll. 3. Remove the thermal head cover [A] (2 screws). 4. Disconnect the three thermal head connectors [B]. 5.

  • Page 256: Thermal Head Drive Pcb

    1 December 1993 4.6 THERMAL HEAD DRIVE PCB 1. Remove the plotter unit. 2. Open the bottom plate [A] of the plotter unit (2 screws). 3. Disconnect the 5 connectors (a to e). 4. Remove the thermal head drive PCB [B] (6 screws). 5-22...

  • Page 257: Master Eject Section

    1 December 1993 5. MASTER EJECT SECTION 5.1 ADJUSTING THE MASTER EJECT SENSOR Purpose: To ensure that the sensor detects the ejected master. Adjustment Standard: 0.8 to 0.9 V when no master is detected. 1. Make a master that has a solid black area as follows. The solid black area should be about size A7 (74 x 105 mm/3"...

  • Page 258: Adjusting The Master Eject Solenoid

    1 December 1993 5.2 ADJUSTING THE MASTER EJECT SOLENOID Purpose: To ensure that the master is ejected. 1. Open the master eject unit and remove its upper cover (4 screws). 2. Check if the lower rollers [B] touch the drum surface or not. If the solenoid [A] is on, then the rollers should touch, and if the solenoid is off, the rollers should not touch.

  • Page 259: Adjusting The Air Knife Motor Safety Switch

    1 December 1993 5.3 ADJUSTING THE AIR KNIFE MOTOR SAFETY SWITCH 0.1 ∼ 0.7 mm Parpose: To ensure that the safety switch turns on and stops the air knife motor when the master eject unit is opened. Adjustment Standard: 0.1 to 0.7 mm 1.

  • Page 260: Master Eject Unit

    1 December 1993 5.4 MASTER EJECT UNIT 1. Remove the upper rear cover (3 screws). 2. Remove the master eject unit cover [A] (2 screws). 3. Disconnect the 3 connectors [C]. 4. Remove the clamper [D]. 5. While supporting the master eject unit [B], slide out the shaft [E]. NOTE: Be careful not to drop the master eject unit.

  • Page 261: Master Eject Sensor

    1 December 1993 5.5 MASTER EJECT SENSOR 1. Remove the master eject unit. 2. Remove the upper master eject unit cover. 3. Remove the 2 screws [A]. 4. Disconnect the connector [C] and remove the master eject sensor [B]. 5-27...

  • Page 262: Master Eject Belt/Roller

    1 December 1993 5.6 MASTER EJECT BELT/ROLLER 1. Remove the master eject unit. 2. Remove the unit cover [A] (6 screws). 3. Remove the 2 E-rings [B] and remove the upper pulley shaft [C]. 4. Remove the 2 E-rings [D] and remove the roller unit from the master eject unit.

  • Page 263: Paper Feed Section

    1 December 1993 6. PAPER FEED SECTION 6.1 ADJUSTING THE PAPER TABLE OPEN SWITCH 0.3 ∼ 0.8 mm Purpose: To ensure that the paper table open switch turns on to prevent the paper table from going up when the paper table is closed. Adjustment Standard: 0.3 to 0.8 mm 1.

  • Page 264: Adjusting The Paper Table Height

    1 December 1993 6.2 ADJUSTING THE PAPER TABLE HEIGHT 147 ± 0.5 mm Purpose: To ensure smooth paper feed. Adjustment Standard: 147 ± 0.5 mm 1. Set the paper feed pressure adjusting lever [A] to the upper position. 2. Remove the right front cover of the machine. 3.

  • Page 265: Adjusting The Separation Plate Release Solenoid

    1 December 1993 6.3 ADJUSTING THE SEPARATION PLATE RELEASE SOLENOID Purpose: To ensure that the separation plate is released from the upper separation roller when the paper table lowers. Adjustment Standard: 0 to 0.5 mm 1. Lower the paper table. 2.
  • Page 266 1 December 1993 [Front View] 0 ∼ 0.5 mm 6. Push up the plunger [F] by hand. Check the distance between the bottom of the separation plate [H] and stoppers [G]. The distance should be between 0 and 0.5 mm. The stoppers [G] are on the front side of the plate [E].

  • Page 267: Adjusting The Paper Feed Roller Pressure

    1 December 1993 6.4 ADJUSTING THE PAPER FEED ROLLER PRESSURE Purpose: To ensure that the paper feed roller exerts sufficient pressure for a smooth paper feed (printing paper weight range of 50 g/m to 215 NOTE: 1. If paper isn’t feeding properly or isn’t feeding at all, follow procedure 1.
  • Page 268 1 December 1993 [Procedure 2] This procedure should only be used when the proper pressure cannot be achieved with procedure 1. 1. Remove the plotter unit. 2. Set the lever for adjusting the paper feed roller pressure up. 3. Remove the right front cover, main PCB, and image processing PCB. 4.

  • Page 269: Adjusting The Lower Guide Plate

    1 December 1993 6.5 ADJUSTING THE LOWER GUIDE PLATE 0 ∼ 0.1 mm Purpose: To ensure a smooth paper feed, and to prevent paper jams, folds, or wrinkles. Adjustment Standard: 0 to 0.1 mm 1. Make sure that the distance between the lower guide plate [A] and lower second feed roller [B] is between 0 and 0.1 mm as shown.

  • Page 270: Adjusting The Upper Second Feed Roller

    1 December 1993 6.6 ADJUSTING THE UPPER SECOND FEED ROLLER 0.05 ∼ 0.1 mm Purpose: To ensure that paper is fed straight between the drum and the press roller. Adjustment Standard: 0.05 to 0.1 mm 1. Remove both front and rear covers. 2.

  • Page 271: Adjusting The Separation Plate Pressure

    1 December 1993 6.7 ADJUSTING THE SEPARATION PLATE PRESSURE [A]: Strong [B]: Factory Setting [C]: Weak Purpose: To adjust the separation plate pressure for the type of paper being used by the customer. Adjustment Standard: See the above illustration. 1. Adjust the separation plate pressure by turning the adjusting screw [D]. NOTE: Position the minus groove on the screw head vertically horizontally .

  • Page 272: Adjusting The Feed-Length Of The Paper Feed Roller

    1 December 1993 6.8 ADJUSTING THE FEED-LENGTH OF THE PAPER FEED ROLLER 93 ∼ 97 mm Purpose: To ensure paper feed to the second paper feed roller. Adjustment Standard: 93 to 97 mm 1. Stack about 100 sheets of 65 g/m paper on the paper table.

  • Page 273: Adjusting The Clearance Of The Paper Feed Sector Gear

    1 December 1993 6.9 ADJUSTING THE CLEARANCE OF THE PAPER FEED SECTOR GEAR STOPPER 0.1 ∼ 0.3 mm 0.1 ∼ 0.5 mm Purpose: To ensure that the paper feed roller starts rotating when the paper feed solenoid turns on and stops rotating when the paper feed solenoid turns off.

  • Page 274: Adjusting The Clearance Of The Second Feed Roller Sector

    1 December 1993 6.10 ADJUSTING THE CLEARANCE OF THE SECOND FEED ROLLER SECTOR STOPPER 0.1 ∼ 0.3 mm Purpose: To ensure that the second feed roller starts rotating when the paper feed solenoid turns on and stops rotating when the paper feed solenoid turns off.

  • Page 275: Adjusting The Feed-Length Of The Second Feed Roller

    1 December 1993 6.11 ADJUSTING THE FEED-LENGTH OF THE SECOND FEED ROLLER 80 ∼ 85 mm Press Roller X: Reducing the feed length Y: Increasing the feed length Purpose: To ensure proper paper feed by the second feed rollers. Adjustment Standard: 80 to 85 mm 1.

  • Page 276: Adjusting The Feed Timing Of The Second Feed Roller

    1 December 1993 6.12 ADJUSTING THE FEED TIMING OF THE SECOND FEED ROLLER Purpose: To ensure paper feed by regulating the timing to start the second feed roller. Adjustment Standard: 178° 1. Set the Image Position indicator to the "0" position and return the drum to the home position by turning off and on the main switch.
  • Page 277 1 December 1993 4. Turn on the paper feed solenoid [F] manually and, using a 10 mm spanner, gradually turn the drum rotation shaft. 5. Measure the degrees turned when the second feed roller sector gear [C] starts returning counterclockwise. (The second feed rollers start rotating.) This should be 178°.

  • Page 278: Paper Feed Roller

    1 December 1993 6.13 PAPER FEED ROLLER 1. Remove the left clamper [A]. 2. Remove the left bushing [B]. 3. Remove the paper feed roller shaft [C]. 4. Remove the 2 paper feed rollers [D]. 5-44...

  • Page 279: Paper Feed Roller Unit

    1 December 1993 6.14 PAPER FEED ROLLER UNIT 1. Remove the plotter unit. 2. Remove 2 hexagon screws [A]. 3. Remove the clamper [B]. 4. Remove the paper feed roller unit from the machine by sliding the shaft to the rear. 5-45...

  • Page 280: Upper Separation Roller

    1 December 1993 6.15 UPPER SEPARATION ROLLER [C ] [C ] 1. Remove the paper feed roller unit. 2. Remove the clamps [A] from both sides of the upper separation roller. 3. Slide the shaft [B] in the direction of the arrow. 4.

  • Page 281: Separation Plate Release Solenoid And Paper Return Motor

    1 December 1993 6.16 SEPARATION PLATE RELEASE SOLENOID AND PAPER RETURN MOTOR 1. Remove the front plate. (See Adjusting the Separation Plate Release Solenoid section.) 2. Remove the paper return motor [A] using a small plus screwdriver. 3. Remove the spring [B], then remove the separation plate release solenoid assembly [C] (2 screws).

  • Page 282: Separation Plate/Lower Separation Roller

    1 December 1993 6.17 SEPARATION PLATE/LOWER SEPARATION ROLLER [Separation Plate] 1. Remove the separation plate [A] with the spring [B] (1 screw). [Lower Separation Roller] 1. Remove the plotter unit, paper feed roller unit and drum unit. 2. Remove the 2 springs [C] and slide the upper second feed roller [D] in the direction of the arrow.

  • Page 283: Printing Section

    1 December 1993 7. PRINTING SECTION 7.1 ADJUSTING THE CLEARANCE OF THE PAPER DETECTING ARM 0.2 ∼ 0.4 mm Purpose: To ensure that printing pressure is applied during paper feed, and is released correctly afterwards. Adjustment Standard: 0.2 to 0.4 mm 1.

  • Page 284: Adjusting The Press Roller Position 1

    1 December 1993 7.2 ADJUSTING THE PRESS ROLLER POSITION 1 0.6 ∼ 1.0 mm Purpose: To ensure that the press roller does not touch the clamper section of the drum. Adjustment Standard: 0.6 to 1.0 mm 1. Remove the rear cover of the machine. 2.

  • Page 285: Adjusting The Press Roller Position 2 (For The A4/Lt Drum)

    1 December 1993 7.3 ADJUSTING THE PRESS ROLLER POSITION 2 (FOR THE A4/LT DRUM) Purpose: To keep the distance between the press roller and the drum constant while the printing pressure is released. NOTE: Perform this adjustment after adjusting the press roller position 1. 1.

  • Page 286: Adjusting The Pressure Timing

    1 December 1993 7.4 ADJUSTING THE PRESSURE TIMING Purpose: To ensure that the maximum printing area is within specifications, and that the ink does not stain the trailing edge. Adjustment Standard: 229° 1. Stack about 100 sheets of 65 g/m paper on the table.

  • Page 287: Adjusting The Printing Pressure

    1 December 1993 7.5 ADJUSTING THE PRINTING PRESSURE Standard Setting: 4 mm Purpose: To apply the proper printing pressure to the press roller. Adjustment Standard: 4 mm 1. Remove the rear cover of the machine. 2. Adjust the clearance [A] to be 4 mm by turning the adjusting bolt [B]. 5-53...

  • Page 288: Adjusting The Clearance Of The Printing Pressure Solenoid

    1 December 1993 7.6 ADJUSTING THE CLEARANCE OF THE PRINTING PRESSURE SOLENOID 1 ∼ 2 mm Purpose: To ensure that the printing pressure stopper is released when the paper feed starts, and that the stopper is locked within one drum rotation when a paper jam occurs.

  • Page 289: Press Roller

    1 December 1993 7.7 PRESS ROLLER 1. Remove the screw [A]. 2. Slide the holding plate [B] to the front side of the machine. 3. Remove the press roller. 4. Remove both right and left bearings [C] (2 E-rings). 5-55...

  • Page 290: Drum Section

    1 December 1993 8. DRUM SECTION 8.1 ADJUSTING THE MAIN DRIVE BELT TENSION 1.5 mm Purpose: To ensure that the main motor rotation is correctly transmitted to the drum. Adjustment Standard: 1.5 mm 1. Remove the rear cover of the machine. 2.

  • Page 291: Adjusting The Drum Master Detection Sensor

    1 December 1993 8.2 ADJUSTING THE DRUM MASTER DETECTION SENSOR Purpose: To ensure that the drum master detection sensor correctly detects the master on the drum. Adjustment Standard: 0.9 to 1.0 V when the sensor is activated, and 2.0 V or higher when it is not activated.

  • Page 292: Adjusting The Printing Speed

    1 December 1993 8.3 ADJUSTING THE PRINTING SPEED Purpose: To ensure the correct main motor speed. Adjustment Standard: 120 rotations/minute at the maximum printing −1 speed. 1. Press the Speed Change key to set the speed at the maximum level. 2.

  • Page 293: Adjusting The Drum Stopper

    1 December 1993 8.4 ADJUSTING THE DRUM STOPPER 1 mm or less Purpose: To ensure that the drum is securely locked when the drum unit is pulled out. Adjustment Standard: 1 mm or less 1. Remove the drum unit from the machine. 2.

  • Page 294: Adjusting The Drum Lock Solenoid

    1 December 1993 8.5 ADJUSTING THE DRUM LOCK SOLENOID 0.3 ∼ 0.8 mm Purpose: To ensure that the drum can be removed only when it is in the home position. Adjustment Standard: 0.3 to 0.8 mm 1. Remove the drum unit from the machine. 2.

  • Page 295: Adjusting The Master Feed Clamper Cam

    1 December 1993 8.6 ADJUSTING THE MASTER FEED CLAMPER CAM Purpose: To ensure that the master feed clamper is open during the master feed process and is closed during other processes. Adjustment Standard: 29 ± 0.5 mm when the solenoid is energized, and less than 25 mm when it is de-energized.

  • Page 296: Adjusting The Master Eject Clamper Cam

    1 December 1993 8.7 ADJUSTING THE MASTER EJECT CLAMPER CAM Purpose: To position the master eject clamper cam [B] so that the master clamper opens correctly during the master eject process and closes correctly for all other processes. Adjustment Standard: 29 ± 0.5 mm when the solenoid is energized, and less than 25 mm when it is de-energized.

  • Page 297: Adjusting The Position Of The Ink Detecting Pin

    1 December 1993 8.8 ADJUSTING THE POSITION OF THE INK DETECTING PIN 5 ± 1 mm Purpose: To ensure detection of ink built-up between the ink roller and the doctor roller. Adjustment Standard: 5 ± 1 mm 1. Remove the drum unit. 2.

  • Page 298: Adjusting The Clearance Of The Doctor Roller

    1 December 1993 8.9 ADJUSTING THE CLEARANCE OF THE DOCTOR ROLLER 0.08 mm Purpose: To equalize the ink thickness around the ink roller and prevent an uneven image. Adjustment Standard: 0.08 mm 1. Remove the drum unit. 2. Remove the clamper. 3.

  • Page 299: Adjusting The Ink Roller With The Drum Unit

    1 December 1993 8.10 ADJUSTING THE INK ROLLER WITH THE DRUM UNIT Purpose: To ensure that the pressure of the press roller is applied evenly to the ink roller. Adjustment Standard: The drum gauge must be inserted. 1. Remove the drum unit from the machine. 2.

  • Page 300: Adjusting The Position Of The Ink Supply Solenoid

    1 December 1993 8.11 ADJUSTING THE POSITION OF THE INK SUPPLY SOLENOID 0.5 ± 1 mm Purpose: To ensure total clutch-sleeve release by the stopper when the ink supply solenoid [A] turns on and complete clutch-sleeve locking by the stopper when the ink supply solenoid turns off. Adjustment Standard: 0.5 ±...

  • Page 301: Adjusting Ink Detection

    1 December 1993 8.12 ADJUSTING INK DETECTION (Standard Signal) 4 µsec µsec VR901 (Detection Signal) Oil-type TP-12V Purpose: To ensure that the ink detection PCB detects a no ink condition when the ink is running out. Adjustment Standard: See the Above illustration. 1.

  • Page 302: Screen

    1 December 1993 8.13 SCREEN Inside Outside 1. Remove the drum unit from the machine. 2. Remove the front stay [A] of the screen [B] (2 screws). 3. Remove the 2 springs [C]. 4. Remove the screen [B]. NOTE: 1. Make sure that the black seal [D] is on the front side (outside) of the screen when reinstalling it.

  • Page 303: Drum Drive Belt

    1 December 1993 8.14 DRUM DRIVE BELT Removal: 1. Set the image position to "0" by turning the main switch off and on. 2. Turn off the main switch and unplug the power supply cord. 3. Remove the drum unit. 4.
  • Page 304 1 December 1993 8. Remove the relay gear assembly [A]. 9. Remove the timing gear assembly [B]. 10. Remove two belt tension bearings [C]. 11. Remove the pressure cam drive gear [D] (2 hexagon bolts [E] and 1 E-ring). NOTE: Four hexagon bolts secure the gear [D]. Do not loosen the two deeply recessed bolts [F].
  • Page 305 1 December 1993 Assembly: 1.Install a new drum drive belt [A]. 2. Adjust the drum drive belt position. 1) The hole [B] in the drum drive gear [C] is aligned with the hole in the rear side plate. At this time, the notch cut [D] in the plate lines up with the center of the drum drive gear cutout [E].
  • Page 306 1 December 1993 7. Adjust the position of the second feed cam [A] so that the center of the slot [B] in the second feed cam is aligned with the bearing shaft [C]. 8. Install the timing gear assembly [D] with the two bearings [E]. NOTE: Make sure that the pin on the timing gear assembly is in the groove [F] of the cam gear [G].

  • Page 307: Delivery Section

    1 December 1993 9. DELIVERY SECTION 9.1 ADJUSTING THE FIRST PAPER EXIT SENSOR Purpose: To ensure that the sensor detects correct paper delivery, and to ensure that the jam indicator blinks properly after an exit misfeed or a paper wrap occurs. Ajustment Standard: 0.8 to 0.9 V 1.

  • Page 308: Adjusting The Second Paper Exit Sensor

    1 December 1993 9.2 ADJUSTING THE SECOND PAPER EXIT SENSOR Purpose: To ensure correct sensor detection of printing paper, and to ensure that the jam indicator blinks and the machine stops when a paper wrap or an exit misfeed occurs. Adjustment Standard: VR103 is set at the ON/OFF threshold of LED103 [D].

  • Page 309: Adjusting The Clearance Of The Exit Pawl

    1 December 1993 9.3 ADJUSTING THE CLEARANCE OF THE EXIT PAWL 0.4 ∼ 0.7 mm Purpose: To ensure that the printing paper is delivered without a paper wrap problem or damage to the screen. Adjustment Standard: 0.4 to 0.7 mm 1.

  • Page 310: Adjusting The Exit Pawl Timing

    1 December 1993 9.4 ADJUSTING THE EXIT PAWL TIMING Purpose: To ensure that the exit pawl does not touch the master clamper. Adjustment Standard: 232 ± 3° 1. Remove the rear cover of the machine. 2. Press and hold down the Drum Rotation button until the drum reaches the home position.

  • Page 311: Adjusting The Paper Exit Pawl Air Pump

    1 December 1993 9.5 ADJUSTING THE PAPER EXIT PAWL AIR PUMP Purpose: To ensure that the paper exit pawl air pump produces a jet of air when the paper exit pawl is in the upper position (near the drum surface). Adjustment Standard: When the drum has rotated 303 ±...

  • Page 312: Transport Unit

    1 December 1993 9.6 TRANSPORT UNIT 1. Remove the right front cover and remove the inner cover. 2. Remove the exit side plate [A] (4 screws). 3. Remove the harness clamp and disconnect the two connectors [B]. 4. Remove the two screws [C]. 5.

  • Page 313: Delivery Belt

    1 December 1993 9.7 DELIVERY BELT 1. Remove the transport unit. (See Transport Unit section.) 2. Remove the E-rings [A] and bushings [B]. Then, slide out the rollers [C]. 3. Remove the two screws [D] securing the transport guide plate [E]. 4.

  • Page 314: Transport Vacuum Fan And Paper Exit Sensors

    1 December 1993 9.8 TRANSPORT VACUUM FAN AND PAPER EXIT SENSORS 1. Remove the transport unit. (See Transport Unit section.) 2. Turn the transport unit over. 3. Remove the transport vacuum fan motor [A]. 4. Remove the first and second paper exit sensors [B]. 5-80...

  • Page 315: Image Positioning Section

    1 December 1993 10. IMAGE POSITIONING SECTION 10.1 ADJUSTING THE IMAGE POSITION Purpose: To ensure that the image is well centered when the Image Position key is set to "0". Adjustment Standard: The gauge [A] must be inserted. 1. Remove the rear cover. 2.
  • Page 316 1 December 1993 5. Make prints to check the image position. CAUTION: Do not keep on pressing the Image Position key if the im- age position sensor is broken or removed. The plastic gears between the worm gear [F] and gear [D] may break if the pin which moves along the spiral track of the gear [D] hits the end of the track.

  • Page 317: Troubleshooting

    SECTION 6 TROUBLESHOOTING...

  • Page 318: Electrical Component Trouble

    1 December 1993 1. ELECTRICAL COMPONENT TROUBLE Component Condition Phenomenon Machine does not work. (No indicators on the Open (Power Supply Unit) operation panel turn on.) When the main switch is turned on, "E-11" is Open (Power Supply Unit) displayed. FU101 When the Print Start key is pressed, paper is not (Main PCB)
  • Page 319 1 December 1993 Component Condition Phenomenon Paper Table Lower ON condition The paper table does not go down. Limit Sensor (Interrupted) OFF condition When the paper feed table goes down and stops, (Not interrupted) the cover open indicator blinks. Paper Table Safety ON condition When the main switch is turned on, the cover Switch...
  • Page 320 1 December 1993 Component Condition Phenomenon Master End Sensor Normal operation when master is present. Master end is not detected; Master End indicators "C" ON condition do not blink and jam indicators "C" and (Activated) blink. Even if the master is present, the Master End OFF condition indicators "C"...
  • Page 321 1 December 1993 Component Condition Phenomenon Lower Pressure Plate After master making process is finished and one ON condition Sensor sheet of paper is delivered, indicates. (Interrupted) OFF condition Pressure plate does not stop at the lower position. (Not interrupted) Paper Width Sensor 0 "...

  • Page 322: Troubleshooting

    1 December 1993 2. TROUBLESHOOTING 2.1 IMAGE TROUBLE 1. No image, white lines, uneven image on copy Does the image created on the master match the original? Is enough ink supplied to the drum? Is the ink supply solenoid energized? Check the ink supply mechanism.
  • Page 323 1 December 1993 Has the platen roller been mounted correctly on the thermal head? Mount the platen roller correctly. Make prints in Test Pattern mode and check the image. Does the same problem still occur with the test pattern? A/D conversion PCB, CCD PCB, or image processing PCB is defective.
  • Page 324 1 December 1993 2. Print image is enlarged or reduced in the paper feed direction Original Lengthened Shortened Is the print image larger than the original in the paper feed direction? Is the original transport motor functioning normally? Check the original transport motor. Are the drive belts in the original feed section adjusted to the correct tension? Adjust the belt tension.
  • Page 325 1 December 1993 Are any of the pulleys and/or gears in the master feed section loose? Tighten the screws securing the pulleys and/or the gears.

  • Page 326: Paper Feed Trouble

    1 December 1993 2.2 PAPER FEED TROUBLE 1. No paper is fed from the paper table. Are the paper feed rollers turning normally? Does the paper feed table raise when the Print Start key is pressed? Check the paper table drive motor, paper table height sensor, and AC drive PCB.
  • Page 327 1 December 1993 Is the one-way clutch on the paper feed roller shaft slipping? (Paper is often not fed forward at high printing speeds.) Lightly sand the roller shaft surface with fine sandpaper (increases the coefficient of friction) and replace the clutch. 6-10...
  • Page 328 1 December 1993 2. Paper leading edge jams under the second feed roller. Does the upper second feed roller contact the lower second feed roller and are both rollers turning normally? Is the second feed sector gear turning normally? Check the clearance between the second feed sector gear stopper and the stopper pin.
  • Page 329 1 December 1993 3. Paper leading edge jams under the drum. Is the printing pressure correctly applied to the drum? Does the printing pressure solenoid turn on? Check the solenoid in I/O check mode. Is the clearance between the printing pressure stopper and the stopper pin correct? Adjust the clearance.
  • Page 330 1 December 1993 4. Paper frequently jams or is not fed during high speed printing. (Does not occur at low printing speeds.). Is the surface of the paper feed roller damaged or defective? Replace the roller. Is the timing belt of the paper feed roller slipping? Adjust the belt tension.

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