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Digital Equipment LB12 Field Support Manual

Fbs slip & passbook printer
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FBS Slip & Passbook Printer
LB12/LB15
Field Support Manual
Part Number: EK-A0685-SV002

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  • Page 1 FBS Slip & Passbook Printer LB12/LB15 Field Support Manual Part Number: EK-A0685-SV002...
  • Page 2 FBS Slip & Passbook Printer LB12/LB15 Field Support Manual...
  • Page 3 APP 6390 Application Programmer's Guide AA-PTGWB-TE APP 6390 Available Emulations Reference Manual AA-PYSWB-TE This is a publication of DIGITAL EQUIPMENT BCFI AB Printers and Peripherals S-175 29 JÄRFÄLLA, Sweden © Digital Equipment BCFI AB, 1997 All rights reserved. Reproduction in whole or in parts is prohibited without written consent of the copyright owner.
  • Page 4 CONTENTS LB12/LB15 FIELD SUPPORT MANUAL Chapter GENERAL DESCRIPTION Chapter FUNCTIONAL DESCRIPTION Chapter MAINTENANCE Chapter SITE PREPARATION 9710 LB12/LB15 Field Support Manual...
  • Page 5 This type of safety instruction is used where injury to personnel and/or damage to the equipment or the environment can occur, if related instructions are not followed. NOTE! Notes are used to provide important or explanatory information. 9710 LB12/LB15 Field Support Manual...

  • Page 6: Table Of Contents

    Printer dimensions with MSF device installed..............1-19 Vertically folded passbooks ..................1-20 Horizontally folded passbooks ..................1-20 Figure The LB12/LB15 printers, exterior ....................1-3 Removing the cover ........................1-5 Printer modules .........................1-6 Print area on vouchers ......................1-9 Print area on vertically folded type A passbooks..............1-10 Print area on vertically folded type B passbooks..............1-12...
  • Page 7 LB12/LB15 Field Support Manual 9710...

  • Page 8: Section 1.1 Introduction

    1.1.1 Printing characteristics On the LB12/LB15 printers, printing can take place at a speed of up to 300 characters per second in both directions. The printer maintains the highest possible print speed by automatically calculating the shortest possible route to the next print position. The position of the 18-needle printhead can be controlled by the application program.

  • Page 9: Information Feedback

    ON to STANDBY mode (and vice versa) by using the ON switch at the front of the printer. The LB12/LB15 can also be switched OFF from the application program. The ON switch, however, overrides software-controlled switching. The ON LED illuminates when the printer is switched ON.

  • Page 10: Removing The Cover

    REMOVING THE COVER Remove the front cover and the document guide (see the LB12/LB15 User's Guide ). Press the lid release button (a). Raise the lid (b) until the lid support (c) snaps into the locked position. Press the left side of the cover...

  • Page 11: The Design Concept

    LB12. The main board (l) is mounted between the printer mechanism and the bottom plate (r). The setup panel (i) can be replaced by an optional diagnostic panel. LB12/LB15 Field Support Manual 9710...

  • Page 12: Technical Data

    German Swedish British Norwegian/Danish French Portuguese Spanish Swiss ProPrinter and 4722 modes Code pages 437 and 850. Other character sets Other typefaces, fonts, logos etc. can be added as PROMs or downloaded from the system. 9710 LB12/LB15 Field Support Manual...

  • Page 13: Document Station

    If four copies are used, the lower values must be followed. The binder for the set can be placed on any side or at the top. Document feed Single line (1/6”) 50ms. Max. speed 0.4m/s = 95 lines/second. LB12/LB15 Field Support Manual 9710...

  • Page 14: Print Area On Vouchers

    Table 1-1 Print measurements on vouchers The maximum document height is 318mm when using bottom synchronization, starting 4mm from the upper edge. The document height is infinite when using top synchronization but PH is also maximized for top synchronization. 9710 LB12/LB15 Field Support Manual...

  • Page 15: Print Area On Passbooks

    Height is less than 122mm and the book has cut inner pages. Lower edge to be inserted first. * No restrictions if pages are flipped over. Figure 1-5 Print area on vertically folded type A passbooks See the measurement table on the next page. 1-10 LB12/LB15 Field Support Manual 9710...
  • Page 16 IMPORTANT ! The function of the document feed mechanism must be verified before books of different widths are used in the same printer. See Chapter 3, Maintenance, for information about adjusting the pressure rolls. 9710 LB12/LB15 Field Support Manual 1-11...
  • Page 17 The book is turned upside down to ease paper feeding. The text is rotated 180°. * No restrictions if pages are flipped over. Figure 1-6 Print area on vertically folded type B passbooks See the measurement table on the next page. 1-12 LB12/LB15 Field Support Manual 9710...
  • Page 18 IMPORTANT ! The function of the document feed mechanism must be verified before books of different widths are used in the same printer. See Chapter 3, Maintenance, for information about adjusting the pressure rolls. 9710 LB12/LB15 Field Support Manual 1-13...
  • Page 19 IMPORTANT ! The function of the document feed mechanism must be verified before passbooks of differing widths are used in the same printer. See Chapter 3, Maintenance, for information about adjusting the pressure rolls. 1-14 LB12/LB15 Field Support Manual 9710...

  • Page 20: Book Thickness

    Other tests See Chapter 3, Maintenance . 1.4.5 Environmental conditions Temperature Operating +10— +35°C. Storage –40— +70°C. Humidity Operating 20—80% RH, non-condensing. Storage 20—90% RH, non-condensing. 9710 LB12/LB15 Field Support Manual 1-15...

  • Page 21: Miscellaneous

    More than 4x106 characters. With OCR printing, more than 2.8 x 106 characters. The lower value is due to a higher degree of inking. 1.4.7 Position Detection Facility Detects the left document edge. 1.4.8 Communications interface See the LB12/LB15 User's Guide . 1-16 LB12/LB15 Field Support Manual 9710...

  • Page 22: Magnetic Stripe Facility

    Document guide with increased height (standard MSF version or MSF version with operator panel). • Printer bottom plate assembly with increased height compared to the bottom plate used in the LB12 • Interconnecting cables between the MSF mechanics and the MSF logic board. 9710 LB12/LB15 Field Support Manual 1-17...
  • Page 23 Figure 1-9 The main parts of the MSF device 1-18 LB12/LB15 Field Support Manual 9710...

  • Page 24: Performance

    5 bits (4 data + 1 parity bit), LSB first. Parity Odd. Transaction time 2.5 s approx. (2 forward + 2 backward movements). Printer dimensions with MSF device installed Height, front 197mm. Height, back 215mm. Document guide depth 96 mm. 9710 LB12/LB15 Field Support Manual 1-19...

  • Page 25: Vertically Folded Passbooks

    Inner pages can be shorter than the passbook cover. Figure 1-10 Dimensions of vertically folded passbooks Horizontally folded passbooks Inner pages must not be smaller than the passbook cover. Figure 1-11 Dimensions of horizontally folded passbooks 1-20 LB12/LB15 Field Support Manual 9710...
  • Page 26 IBM ProPrinter III emulation ....................2-32 STEPPER MOTOR DRIVE PRINCIPLES................2-33 2.3.1 General ..........................2-33 2.3.2 General motor drive principles ....................2-33 2.3.3 Stepper motor drive in the LB12/LB15 printers ...............2-35 NEEDLE FIRING PRINCIPLES ....................2-35 FIRMWARE STRUCTURE......................2-35 MEMORY USAGE ........................2-36 9710 LB12/LB15 Field Support Manual...
  • Page 27 Document edge opto-sensor....................2-21 2-24c AIF opto-sensor........................2-21 2-25 Opto-sensor logic ........................2-22 2-26 Diagnostic panel........................2-24 2-27 LB12/LB15 block diagram .......................2-25 2-28 Printhead needle arrangement....................2-27 2-29 Character formation in high quality printing................2-27 2-30 Character formation at 300cpi print speed ................2-28 2-31 Character repertoires and character sets................2-29 2-32 Character code table layout ....................2-30...

  • Page 28: Section 2.1 Main Functional Parts

    • right-edge sensor • Automatic Insertion Function (AIF) sensor. Figure 2-1 Document feed mechanism The thumbwheel near the setup/diagnostic panel can be used to retrieve a document that has become trapped inside the printer. 9710 LB12/LB15 Field Support Manual...

  • Page 29: Pressure Rolls Mechanism

    This arm also controls the stop pins via a tension spring. When the stop pins are lowered, the upper part of arm (C) interrupts the light in the opto-sensor (D) which signals to the CPU that the document path is free. Figure 2-3 Stop pin mechanism LB12/LB15 Field Support Manual 9710...

  • Page 30: Home Position

    Inserting a document against the outer stop pins Thin documents, such as forms and vertically folded passbooks, should be inserted against the outer stop pins, as shown below. Figure 2-5 The document being fed in 9710 LB12/LB15 Field Support Manual...
  • Page 31 Figure 2-6 The feed motor starting to feed in the document The cam wheel turns a further 30 degrees, lowering the rear pressure rolls. The rear feed rolls now take part in feeding the document. Figure 2-7 Lowering the rear pressure rolls LB12/LB15 Field Support Manual 9710...
  • Page 32 When the bottom edge passes the outer edge sensor, the cam wheel returns to the 120 degrees position, thus lowering the front pressure rolls to achieve the complete release of the document. Figure 2-9 Front pressure rolls lowered to complete the document release 9710 LB12/LB15 Field Support Manual...

  • Page 33: Rotary Print Unit

    Position Detection Facility (PDF) in the document station • printing in the document station. Horizontal position, used for: • ink ribbon cassette replacement. See Page 2-11 for information about the print unit release and locking mechanism. LB12/LB15 Field Support Manual 9710...

  • Page 34: Lateral Carriage Movement

    Figure 2-11 Print unit position sensor (V-H sensor) 2.1.3 Lateral carriage movement The carriage is driven laterally by a stepper motor via a toothed belt clamped to the carriage with a belt clamp. Figure 2-12 Carriage drive mechanism 9710 LB12/LB15 Field Support Manual...

  • Page 35: Ribbon Feed

    The gear is driven indirectly, via an O-ring, by the carriage motor, using the same toothed belt used to drive the carriage. The drive pin rotates in the same direction regardless of the direction of the carriage movement. Figure 2-13 Ribbon drive mechanism 2-10 LB12/LB15 Field Support Manual 9710...

  • Page 36: Rotary Print Unit Release And Locking

    To return the print unit to the vertical position, press the step switch and, when the carriage has released the locking pin, rotate the print unit manually until the latch snaps into the locked position. 9710 LB12/LB15 Field Support Manual 2-11...

  • Page 37: Printhead-To-Paper Distance Control (Pdc) Mechanism

    Hall element. The output voltage from this Hall element indirectly controls the turning of the PDC motor and hence the position of the cam wheel and the printhead. The sensor is called the distance sensor. Figure 2-15 Printhead-to-paper distance mechanism in document position 2-12 LB12/LB15 Field Support Manual 9710...

  • Page 38: Head Attach And Release

    The printhead is mechanically locked. Head transport Range between Head Attach and Head Release Long positions. Table 2-1 Printhead positions and related CPU commands 9710 LB12/LB15 Field Support Manual 2-13...
  • Page 39 The following figures show some of the printhead positions. Fig 2-17 Head attach position for passbook printing Figure 2-18 Head release short position Figure 2-19 Home position (= head release long) 2-14 LB12/LB15 Field Support Manual 9710...

  • Page 40: Auto Calibration

    For this reason, the distance between the paper and the printhead will never be less than 0.3mm, which prevents the paper from being unintentionally colored by the ink ribbon. 9710 LB12/LB15 Field Support Manual 2-15...

  • Page 41: Passbook Printing

    6 mm (140 steps) forward from home position • Head release, short (HRS) 2.0 mm (32 steps) from the paper • Head release long (HRL), home pos. Reference position, 5.25 mm from the printbar Figure 2-20 The PDC cam wheel 2-16 LB12/LB15 Field Support Manual 9710...
  • Page 42 The sensor is enabled again when the head approaches the Head Attach Book position and the PDCPOS is sent to the CPU. The figure below shows how the PDC sensor voltage changes as the printhead moves. Figure 2-21 PDC sensor output voltage 9710 LB12/LB15 Field Support Manual 2-17...

  • Page 43: Sensor Element

    The Hall IC includes the circuits shown in the block diagram below. An internal voltage regulator supplies the Hall-effect generator and amplifier. An operator amplifier amplifies the relatively small Hall-effect voltage. Figure 2-22 PDC sensor element 2-18 LB12/LB15 Field Support Manual 9710...

  • Page 44: Pdf - Position Detection Facility

    The DUART also receives signals from: • the ON-OFF switch on the document sensing board • the setting switch on the diagnostic panel • the host, when it issues a command for remote power OFF. 9710 LB12/LB15 Field Support Manual 2-19...

  • Page 45: Carriage Motor Drive Circuits

    If the remote power OFF control function has been selected (see Chapter 6 of the LB12/LB15 User’s Guide ), a high signal level sets the PSU to standby mode, where only the voltage required for RAM backup is supplied.
  • Page 46 Small metal or plastic plates or "flags" can move into the gaps, thus breaking the light beam. Fig 2-24a Light-breaking opto-sensors Fig 2-24b Document edge opto-sensor Fig 2-24c AIF opto-sensor 9710 LB12/LB15 Field Support Manual 2-21...

  • Page 47: Pdf Sensor

    PI/T. After being negated on the main board, CLEDON-N actuates the light transmitter in the opto-sensor. Its receiver output, CONSENSEB, becomes inverted in a comparator producing a positive signal that is sent to the document sensing board. 2-22 LB12/LB15 Field Support Manual 9710...

  • Page 48: Sensor Calibration

    The second step is a DC/DC conversion from +36 V to +5 V and –12 V. A +12 V voltage is generated on the main board by a voltage regulator supplied from the +36 V. Only the +5 V is provided with a LED indicator (ON lamp) located at the front of the printer. 9710 LB12/LB15 Field Support Manual 2-23...

  • Page 49: Diagnostic Panel (Optional)

    The set-up panel is the same as the diagnostic panel, except that the printed board assembly has only a lid switch and a step switch. These switches function in the same way as the corresponding switches on the diagnostic panel. 2-24 LB12/LB15 Field Support Manual 9710...
  • Page 50 Figure 2-27 LB12/LB15 block diagram 9710 LB12/LB15 Field Support Manual 2-25...
  • Page 51 2-26 LB12/LB15 Field Support Manual 9710...

  • Page 52: Principles Of Printing

    Figure 2-29 Character formation in high quality printing When printing at 300cpi (9x12 matrix) only one needle row is used. A maximum of 9 non- overlapping dots can be printed in one column. 9710 LB12/LB15 Field Support Manual 2-27...

  • Page 53: Character Repertoires And Character Sets

    RAM area. This means that the number of available graphic characters is theoretically unlimited. 2-28 LB12/LB15 Field Support Manual 9710...

  • Page 54: Character Sets

    2.2.5 Character generation The character set handling used in the LB12/LB15 is based on the code extension techniques defined in the ISO 2022 standard for code extension. This technique means that the character repertoire is built up from a number of character sets and supplementary sets consisting of code tables.
  • Page 55 Invocation. The primary and supplementary basic character sets contain national versions and are, as standard, designated as G0 and G1 sets respectively. They are then invoked to columns 02-07 and 10-15 of the 16-column character table. 2-30 LB12/LB15 Field Support Manual 9710...
  • Page 56 Locking Shift, LS, (the whole G set is invoked) • Single Shift, SS, (only the following character is invoked). The designation of another character set to an already invoked G set automatically invokes the new set. Figure 2-33 Code extension principles 9710 LB12/LB15 Field Support Manual 2-31...

  • Page 57: Graphic Character Representation

    2.2.8 IBM ProPrinter III emulation For information, refer to the APP 6390 Available Emulations Reference Manual . 2-32 LB12/LB15 Field Support Manual 9710...

  • Page 58: Stepper Motor Drive Principles

    STEPPER MOTOR DRIVE PRINCIPLES 2.3.1 General The LB12/LB15 has four stepper motors.These are: • the carriage motor • the PDC motor • the grasp motor • the document motor. 2.3.2 General motor drive principles The method used to drive stepper motors is to switch the current direction through the stator coils, thus achieving a rotating magnetic field that moves the rotor in steps.
  • Page 59 Figure 2-35 Simplified description of the stepper motor function 2-34 LB12/LB15 Field Support Manual 9710...

  • Page 60: Stepper Motor Drive In The Lb12/Lb15 Printers

    Stepper motor drive in the LB12/LB15 printers All the stepper motors used in the LB12/LB15 printers have two windings. There are 200 stator and rotor poles. Thus, a full step is equal to 1.8°. Often, when a motor is stepped, the stepping angle is fixed.

  • Page 61: Memory Usage

    Firmware EPROM MTOS, operating system 12KB Drivers 11KB Stepper motor tables 250KB Character generators 68KB C code 167KB 22.5KB System routines Needle buffer 20KB Line buffer 5.5KB 512KB 64KB Total Table 2-3 Memory usage 2-36 LB12/LB15 Field Support Manual 9710...
  • Page 62 MSF logic board, at the back of the printer, to the carriage-home sensor and the R/W head board. The cable can be detached from the R/W head board, but the sensor is soldered to the cable leads. 9710 LB12/LB15 Field Support Manual 2-37...
  • Page 63 DBUS 7 (equal to DBUS 15 on the main board) and then clears the RBF status. The CPU is now ready for the next decoded data bit. Figure 2-37 Data read signal timing diagram 2-38 LB12/LB15 Field Support Manual 9710...
  • Page 64 RBF (read buffer full). Indicates that one bit has been decoded and can be retrieved by the main board processor. Stepper motor control The function is similar to that of the stepper motors in the basic printer. Refer to Section 2.3. 9710 LB12/LB15 Field Support Manual 2-39...
  • Page 65 Figure 2-38 MSF block diagram...
  • Page 66 ......................3-27 3.5.9 PDC sensor ......................3-28 Checking the PDC sensor gap..................3-28 Adjusting the DC sensor gap ..................3-28 3.5.10 Carriage bearing ......................3-29 3.5.11 Ink ribbon feed ......................3-33 Checking the ribbon feed .....................3-33 Checking the printhead mounting ................3-33 9710 LB12/LB15 Field Support Manual...
  • Page 67 Finding the top sync offset correction value, example ............3-35 3-19 Finding the bottom sync offset correction value, example ............3-36 3-20 Lateral position mark ......................3-36 3-21 Measuring the PDF offset correction..................3-37 3-22 Checking the paper feed motor drive belt ................3-37 LB12/LB15 Field Support Manual 9710...
  • Page 68 Disconnecting the cable from the R/W head board ..............3-64 3-48 Removing the carriage home sensor ..................3-64 Table Displayed information and function with different switch settings ..........3-8 Correlation between display alteration frequency and error type ..........3-8 Parameters/values reset using different reset methods............3-10 9710 LB12/LB15 Field Support Manual...
  • Page 69 LB12/LB15 Field Support Manual 9710...

  • Page 70: Section 3.1 Tools

    • Cleaning solution (isopropanol or a similar alcohol) • Oil Shell Tegula 27 or similar • Grease ESSO Beacon EP 2 (other lubricants MUST NOT be used) • Diagnostic panel, maintenance version (Part No. 5131 197 61400). Figure 3-1 Special tools required 9710 LB12/LB15 Field Support Manual...

  • Page 71: Built-In Special Functions

    3.2.2 Selecting and running the special functions The LB12/LB15 User's Guide describes how to select and run special functions 2, 4, 60-1— 60.8, 61-1—61-12, 62-1—62-8 and 63-1—63-4 using the diagnostic panel. The LB12/LB15 User's Guide also describes how to select and run the corresponding functions when you use the set-up panel.
  • Page 72 SETTING position while the mode switch is in the NORMAL position. Status code "-7" is displayed and signal 133 changes to OFF when the buffer becomes full (see the LB12/LB15 User's Guide for information about the signal line interface circuits).

  • Page 73: Step/Start Switch

    Table 3-2 Correlation between display alteration frequency and error type List of status and error codes Run special function 4 to print a list of the current line status and error codes. LB12/LB15 Field Support Manual 9710...

  • Page 74: Power On Test

    There are different sets of parameters for the various printer sub-units or functions. You should already be familiar with the parameters described in the LB12/LB15 User's Guide . Most of the above parameters can also be changed from the application program via the line by the use of the Set Mode (SM) and Reset Mode (RM) commands.
  • Page 75 About calibration functions 70—75 Most of the calibration functions are used to set calibration values for electronic and electromechanical functions. Function 73 displays the sensor values. See Section 3.5.12 for full details about the calibration functions. 3-10 LB12/LB15 Field Support Manual 9710...

  • Page 76: Preventive Maintenance

    3.3.4 MSF preventive maintenance The only preventive maintenance required for the MSF is the regular removal of dust and paper particles from the edges of the plastic protective panel in the R/W head slot. 9710 LB12/LB15 Field Support Manual 3-11...

  • Page 77: Troubleshooting

    • Sometimes printing just stops C. Easily observed faults. The types of problems found in this area are, for example: • Printed dots differ in contrast • T he printer does not feed the document in 3-12 LB12/LB15 Field Support Manual 9710...

  • Page 78: Fault-Finding Scheme

    3. Look for a short circuit No contact with the controller or host Status code 0 Replace the main board Status code 1 1. Check the signal cable 2. Check the interface parameter setup 9710 LB12/LB15 Field Support Manual 3-13...
  • Page 79 3. Check mechanical operation of print unit rotation/home position 4. Check the bottom sensor Error code 36 or 43—48 (steady) Replace the main board Error code 34 or 37—39 (steady) Power OFF and then power ON again for RAM reset. 3-14 LB12/LB15 Field Support Manual 9710...
  • Page 80 Characters vary in quality 1. Replace the ink ribbon cassette 2. Check the ribbon feed mechanism 3. Replace the main board 4. Replace the capacitor board Paper feed does not function well Check the mechanical operation 9710 LB12/LB15 Field Support Manual 3-15...

  • Page 81: Special Functions For Fault-Finding

    "Power On" shows the threshold values set automatically in RAM during the previous power-ON sequence • the column "Test 70" shows the threshold reference values stored in RAM the last time function 70 was run. 3-16 LB12/LB15 Field Support Manual 9710...
  • Page 82 Figure 3-2 Function 2 printout example 9710 LB12/LB15 Field Support Manual 3-17...

  • Page 83: Burn-In And Line Interface Test

    Set the mode switch in the TEST position. Select function 4. The printout starts when you insert an A4 document into the document station. Reset the mode switch to NORMAL when the printout is complete. See the printout example below. 3-18 LB12/LB15 Field Support Manual 9710...
  • Page 84 Figure 3-3 Function 4 printout example 9710 LB12/LB15 Field Support Manual 3-19...

  • Page 85: Checks And Adjustments

    - Non-operable printer Check that the printhead is in the HRL position. If not, turn the PDC cam wheel manually to move the printhead as far as possible away from the print bar. 3-20 LB12/LB15 Field Support Manual 9710...

  • Page 86: Optical Sensors On The Sensor Board

    Adjust the screw until the shaft can be turned but does not move freely. Turn the shaft downwards until the front pressure rolls are the correct distance from the front feed rolls. Figure 3-5 Adjusting the front pressure rolls 9710 LB12/LB15 Field Support Manual 3-21...

  • Page 87: Grasp Mechanism Belt Tension

    3.25 ±0.25 N (325 ±25 p). Figure 3-6 Drive belt for the grasp mechanism Adjustment Slightly loosen the nuts holding the grasp motor. Slide the motor forward or backward until you obtain the correct reading. Tighten the nuts. 3-22 LB12/LB15 Field Support Manual 9710...

  • Page 88: Document Feed Mechanism Belt Tension

    Figure 3-7 Drive belts for the document feed mechanism Adjustment - upper belt Loosen the thumb-wheel slightly and move it vertically to obtain a suitable tension. 9710 LB12/LB15 Field Support Manual 3-23...

  • Page 89: Carriage Drive Belt

    Operable printer Switch ON the printer and turn the print unit in the same way as when preparing to replace the ink ribbon cassette (see the LB12/LB15 User's Guide ). Inoperable printer Check that the printhead is in the HRL position. If not, turn the PDC cam wheel manually to move the printhead as far from the print bar as possible.
  • Page 90 Move the carriage to the extreme right. Loosen the two screws clamping the drive belt to the carriage. Tighten them again while you keep the carriage pressed against the right-hand side. Figure 3-8b Adjusting the carriage drive belt 9710 LB12/LB15 Field Support Manual 3-25...

  • Page 91: Printhead Slide

    If the reading exceeds 4 N, bend the left end of the leaf spring slightly outward. If the balance reads less than 2 N, remove the leaf spring and bend it the other way. Figure 3-10 Printhead slide (adjustment) 3-26 LB12/LB15 Field Support Manual 9710...

  • Page 92: Nose Wheel

    See the previous figure. If the reading exceeds 1.5 N, bend the right end of the leaf spring slightly outward. If the reading is less than 1 N, loosen the spring and bend it the other way. 9710 LB12/LB15 Field Support Manual 3-27...

  • Page 93: Pdc Sensor

    Gently press the nose wheel inward as far as possible and hold it in this position. Gently press the Hall element against the sensor magnet with the gauge in between, and tighten the lock screw. Release the nose wheel. 3-28 LB12/LB15 Field Support Manual 9710...

  • Page 94: Carriage Bearing

    Continue to loosen them until the belt does not move when you move the carriage. Remove the printhead from the carriage. Loosen the two screws (J) and (D) by two turns. Fig 3-13 Carriage adjustment 9710 LB12/LB15 Field Support Manual 3-29...
  • Page 95 Turn the latch handle and the eccentric disk handle as shown Insert the claws of the tool under the carriage, but on top of the large rolls. Figure 3-14 Fitting the carriage adjustment tool 3-30 LB12/LB15 Field Support Manual 9710...
  • Page 96 Tighten the left screw slightly. It is vital that you tighten this screw first. Tighten the right screw firmly. Tighten the left screw firmly. Remove the tool in the reverse order. Figure 3-15 Carriage adjustments 9710 LB12/LB15 Field Support Manual 3-31...
  • Page 97 14. Mount the printhead. 15. Fit the ink ribbon cassette and generate printouts using special function 02. Compare the printout with the one you produced before starting the carriage adjustments. 3-32 LB12/LB15 Field Support Manual 9710...

  • Page 98: Ink Ribbon Feed

    The reference values, set by the factory using function 70, must not be changed unless one of the following conditions exists: • a cold start has been performed • the main board has been exchanged 9710 LB12/LB15 Field Support Manual 3-33...

  • Page 99: Guide Document For Hw Offsets, Document Station

    2 and 75. The main use of this is in workshop maintenance. Push the mode switch and setting switch back to the NORMAL position. 3-34 LB12/LB15 Field Support Manual 9710...
  • Page 100 Repeat the measurement in the top left corner. If the two correction values differ by more than two units, you must run function 71-0 again, making sure that the paper be- comes correctly aligned. Run function 74-0 to set the new offset value. 9710 LB12/LB15 Field Support Manual 3-35...
  • Page 101 A PDF mark is printed in the left upper corner of the guide document. The center line of this mark should be positioned 4.0mm from the paper edge. The distance between the lines in the mark is 0.5mm. Measure the necessary correction as a number of 0.5mm steps. 3-36 LB12/LB15 Field Support Manual 9710...
  • Page 102 The guide document contains eight lines of the letter 'E'. The print direction is changed for each line shift. The four upper lines are printed with high quality whereas the remaining lines are printed with draft quality. 9710 LB12/LB15 Field Support Manual 3-37...
  • Page 103 Figure 3-23 Function 71-0, printout of the guide for hardware offsets 3-38 LB12/LB15 Field Support Manual 9710...

  • Page 104: Displaying Individual Sensor Values

    Check that the HAB value exceeds the TRP value by more than 55 units and that the HAT value is in the range 120—240. If both conditions are not met, exchange the printhead. Check that HRL<7, HOC>15 and TRP>15 units. If not, exchange the printhead. 9710 LB12/LB15 Field Support Manual 3-39...

  • Page 105: Adjusting The Hw Offsets

    The various elements of the printout are described below: - HRL sensor This information indicates whether or not the PDC mechanism has the new HRL sensor fitted. - MPC reset logic This is valid only for special printer versions. 3-40 LB12/LB15 Field Support Manual 9710...
  • Page 106 Figure 3-24 Printout from special function 75 9710 LB12/LB15 Field Support Manual 3-41...
  • Page 107 TEST position when the first page is printed, a second page is printed if you insert another sheet of A4 paper. The contents of the second page are useful only for developers during a debug phase. 3-42 LB12/LB15 Field Support Manual 9710...

  • Page 108: Ram Reset

    IMPORTANT ! Do not stretch the drive belts too much. Better too loose than too stretched. Check that the belt does not generate noise when you move the carriage. If so, slacken the belt. 9710 LB12/LB15 Field Support Manual 3-43...

  • Page 109: Msf Tests

    Repeated read without document release (special function 44) This is similar to function 42, but with no result printout in the event of errors. Statistics information is printed out only after a completed test. 3-44 LB12/LB15 Field Support Manual 9710...

  • Page 110: Removal And Replacement

    Observe how the PDF sensor cable is routed and fixed on the printhead. Loosen the cable and pull out the sensor. Figure 3-25 Removing the PDF sensor (the sensor can be removed without dismantling the sensor mechanism as shown in this figure) 9710 LB12/LB15 Field Support Manual 3-45...

  • Page 111: Pdc Sensor

    You cannot replace only the sensor element because it is cemented to the bracket. Replacement See Figure 3-25. Mount the sensor by reversing the procedure described above for removal. Mount the printhead on the carriage. Adjust the PDC sensor (see Section 3.5.9). 3-46 LB12/LB15 Field Support Manual 9710...

  • Page 112: Pdc Motor

    Figure 3-26 Removing the PDC motor (this figure is intended for parts identification only) Replacement Mount the parts by reversing the procedure described above for removal. Route the cables in their previous positions. 9710 LB12/LB15 Field Support Manual 3-47...

  • Page 113: Main Board

    Figure 3-27 Removing the document inlet Turn the printer upside down. Disconnect the flat cable connected to the sensing board. Remove the two screws at the bottom of the bottom plate. Figure 3-28 Preparing to remove the main board 3-48 LB12/LB15 Field Support Manual 9710...
  • Page 114 2. Run function 70 to calibrate the opto-sensors. 3. Run function 71 to check the hardware offsets. 4. Run function 2 to print out the Configuration & Calibration Summary. 5. Configure the printer using the special functions. 9710 LB12/LB15 Field Support Manual 3-49...

  • Page 115: Msf Logic Board

    Remove the metal cable guide plate by pulling it straight out, and push the flat cable out through the opening at the front. Figure 3-30 Removing the flat cable assembly (this figure is intended for parts identification only) 3-50 LB12/LB15 Field Support Manual 9710...
  • Page 116 10. Remove the stop pins (a), one on each print unit side plate. Figure 3-31 Preparing to remove the print unit 11. Remove the pivot bearing on the right side (12mm hexagonal head). Figure 3-32 Removing the right side pivot bearing 9710 LB12/LB15 Field Support Manual 3-51...
  • Page 117 Check that the adjustable rear end of arm (d) in Figure 3-31 is in its uppermost position. Check the position of the inner tongue of the cable guide plate (see Figure 3-30). After completing replacement, check the printout quality by running special function 1. 3-52 LB12/LB15 Field Support Manual 9710...

  • Page 118: Carriage Motor

    Figure 3-34a Preparing to remove the carriage motor Remove three screws accessible through holes in the right printer side plate (see below). Figure 3-34b Preparing to remove the carriage motor Turn the print unit to the horizontal position. 9710 LB12/LB15 Field Support Manual 3-53...
  • Page 119 Figure 3-35 Removing the carriage motor (this figure is intended for parts identification only) 13. Pull the carriage motor to the left and remove it. 14. Remove the motor from its support (three nuts). 3-54 LB12/LB15 Field Support Manual 9710...

  • Page 120: Ink Ribbon Gear Box

    Figure 36 Removing the ink ribbon gear box. This figure is intended for parts identification only. No other parts need to be removed or loosened Replacement Fit the gear box by reversing the procedure described above for removal. Mount the ink ribbon drive belt. 9710 LB12/LB15 Field Support Manual 3-55...

  • Page 121: Capacitor Board

    Slightly loosen the two screws joining the bottom plate to the right and left side plates. Swing the bottom plate out. Disconnect the optical fiber cables connector from the document sensing board (see arrow). Disconnect all other cables from the board. 3-56 LB12/LB15 Field Support Manual 9710...
  • Page 122 When you fit the document inlet, check that its plastic tongue enters the corresponding hole in the bottom plate. Run special function 70 to calibrate the opto-sensor threshold values. Run special function 2 to check the sensor values. Run special function 73 for verification. 9710 LB12/LB15 Field Support Manual 3-57...

  • Page 123: Document Sensors

    Removing an outer bottom sensor The sensor is held by two plastic hooks that snap onto a metal stud. Use a small screw driver or similar to loosen the faulty sensor. Figure 3-39 Removing an outer bottom sensor 3-58 LB12/LB15 Field Support Manual 9710...

  • Page 124: Fitting A Document Sensor

    Figure 3-40 Preparing an outer bottom sensor Fit the sensor as shown below. This prevents the plastic hooks on the new sensor from becoming damaged. Figure 3-41 Fitting an outer bottom sensor 9710 LB12/LB15 Field Support Manual 3-59...

  • Page 125: Checks And Adjustments

    > 20%. 2.4. Fix the reflector with a drop of Loctite 290. Using the document sensor tool (Part No: 5131 102 16240, place a piece of white paper under the tool's leaf spring. 3-60 LB12/LB15 Field Support Manual 9710...

  • Page 126: Exposing The Msf Mechanics

    Remove the four front screws fixing the MSF mechanics assembly to the printer body (see the figure below) and raise the assembly to AN almost vertical position (see the figure below). The carriage swings down by its own weight. 9710 LB12/LB15 Field Support Manual 3-61...
  • Page 127 Lower the MSF mechanics assembly carefully while: • swinging up and holding the carriage against the carriage guide bar, ensuring that the head enters properly between its guiding plates. Figure 3-44 Lowering the R/W head between the guide plates 3-62 LB12/LB15 Field Support Manual 9710...

  • Page 128: Home Position Sensor

    11. Move the carriage to its home position (to the left). 12. Reassemble the printer by following steps 12 through to 1, i.e. in reverse order, of the description given in Section 3.6.5 for the removal of the main board. 3.6.15 Home position sensor 9710 LB12/LB15 Field Support Manual 3-63...
  • Page 129 Move the carriage to the middle position. Remove the metal cable clamp snapped on to the front guide shaft. Figure 3-48 Removing the carriage home sensor Remove the two screws holding the carriage-home sensor. Cut the plastic cable straps 3-64 LB12/LB15 Field Support Manual 9710...
  • Page 130 (physical stop). Reassemble the printer by following steps 12 through to 1, i.e. in reverse order, of the description given in Section 3.6.5 for the removal of the main board. 9710 LB12/LB15 Field Support Manual 3-65...
  • Page 131 3-66 LB12/LB15 Field Support Manual 9710...
  • Page 132 CHAPTER 4 SITE PREPARATION Pages 4-1 through 4-4 Section INTRODUCTION ...................... Page 4-3 MEASUREMENTS ........................4-4 Figure Dimensions of the LB12/LB15 printers..................4-4 9710 LB12/LB15 Field Support Manual...
  • Page 133 LB12/LB15 Field Support Manual 9710...
  • Page 134 90º. This means that there must be sufficient space on the desk and that it must be possible to pull out the signal cable approximately 0.5m. 9710 LB12/LB15 Field Support Manual...
  • Page 135 MEASUREMENTS The dimensions of the LB12/LB15 printers are shown below. Figure 4-1 Dimensions of the LB12/LB15 printers LB12/LB15 Field Support Manual 9710...

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