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Digital Equipment LA400 MultiPinter Service Manual

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Service Manual
Order Number: ER-LA400-SV

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Summary of Contents for Digital Equipment LA400 MultiPinter

  • Page 1 Service Manual Order Number: ER-LA400-SV...
  • Page 2 The contents of this manual may be revised without prior notice. © All Rights Reserved, Copyright 1996 Digital Equipment Corporation. Printed in Ireland. No part of this manual may be reproduced in any form without permission. Address your comments and inquiries on this manual to:...

  • Page 3: Table Of Contents

    1.2.3.5 Inked Ribbon Cartridge 1.2.3.6 Mechanical Options Printer Technical Specifications CHAPTER 2 PAPER HANDLING OVERVIEW Introduction 2.1.1 Paper Handling Architecture 2.1.2 Paper Path Configurations 2.1.2.1 Basic Configuration 2.1.2.2 Dual Fanfold Configurations 2.1.2.3 ASF Configuration ____________________________________________________________________________________________ LA400 Multiprinter i. 1 ER-LA400-SV...
  • Page 4 Upper Feeder Assy 4.18 4.3.16 Platen Assy 4.19 4.3.17 Lower Feeder Assy 4.20 4.3.18 Carriage Assy 4.22 4.3.19 Sensor Assy 4.23 4.3.20 Mechanical Assy 4.24 4.3.21 Paper Motor 4.25 4.3.22 Friction Bar Assy 4.26 ____________________________________________________________________________________________ LA400 Multiprinter i. 2 ER-LA400-SV...
  • Page 5 6.3.5 Hex-Dump 6.11 6.3.6 Faulty Probability Guide 6.12 Service Tests and Adjustments 6.16 6.4.1 Introduction 6.16 6.4.2 Loop-back Coonectors 6.16 6.4.3 Execution of the Service Adjustments 6.17 6.4.4 Execution of the Service Tests 6.19 ____________________________________________________________________________________________ LA400 Multiprinter i. 3 ER-LA400-SV...
  • Page 6 Paper Stacker Cable 7.13 7.1.3.4 Operator Panel Cable 7.14 CHAPTER 8 OPTIONS Overview 8.1.1 Automatic Sheet Feeder 8.1.2 Color Motor CHAPTER 9 HW SETTING & FW INSTALLATION Overview 9.1.1 Hardware Setting 9.1.2 Firmware Installation ____________________________________________________________________________________________ LA400 Multiprinter i. 4 ER-LA400-SV...
  • Page 7 Upper Feeder Assy 4.18 4.16 Platen Assy 4.19 4.17 Lower Feeder Assy 4.21 4.18 Carriage Assy 4.22 4.19 Sensor Assy 4.23 4.20 Mechanical Assy 4.24 4.21 Paper Motor 4.25 4.22 Friction Bar Assy 4.26 ____________________________________________________________________________________________ LA400 Multiprinter i. 5 ER-LA400-SV...
  • Page 8 ASF Installation (rear view) Second Bin ASF Installation Color Motor Installation Color Ribbon Installation Tables Printer Path Configurations ORU Order of Access Unrecoverable Error Display Messages Print Head Resistance/Temperature Characteristics Print Head Pin assignment ____________________________________________________________________________________________ LA400 Multiprinter i. 6 ER-LA400-SV...

  • Page 9: General Overview

    Maintenance Manual General Overview _______________________________________________________________________________________ Chapter 1 General Overview ____________________________________________________________________________________________ LA400 Multiprinter 1. 1 ER-LA400-SV...

  • Page 10: Introduction

    General Overview _______________________________________________________________________________________ 1.1 Introduction This Manual describes the features and the maintenance procedures for the new Digital LA400 Multiprinter and its options. 1.1.1 Scope of the Products This printer is an advanced impact printer which give real and effi cient solutions to the actual and future printer needs.

  • Page 11: General Description

    A sketch of the resulting appearance is reported on figures 1.1 and 1.2. 1. Top Cover 4. Single Sheet Support 2. Operator Panel 5. Paper Knob 3. Power Switch 6. Front Tractor Unit Cover Fig. 1.1 Basic Printer Parts Location (front view) ____________________________________________________________________________________________ LA400 Multiprinter 1. 3 ER-LA400-SV...

  • Page 12: Basic Printer Parts Location (Rear View)

    Maintenance Manual General Overview _______________________________________________________________________________________ 1. Interface Cover 4. ASF Location Cover 2. Rear Tractor Unit Cover 5. AC Power Inlet 3. Paper Stacker Covers Fig. 1.2 Basic Printer Parts Location (rear view) ____________________________________________________________________________________________ LA400 Multiprinter 1. 4 ER-LA400-SV...

  • Page 13: Physical Dimension

    In the next figure it is possible to see the internal printer architecture and where the major blocks described below are located. • • MECHANICAL ASSY • • PRINT HEAD • • CABINET • • ELECTRONIC HARDWARE • • INKED RIBBON Fig. 1.3 Printer Internal Architecture ____________________________________________________________________________________________ LA400 Multiprinter 1. 5 ER-LA400-SV...

  • Page 14: Mechanical Assy

    1.2.3.3 Cabinet The cabinet allows safety-proof lifting of frontal part for ribbon substitution and paper path check. It is composed of various parts to allow an easy access to all the printer internal parts. ____________________________________________________________________________________________ LA400 Multiprinter 1. 6 ER-LA400-SV...

  • Page 15: Electronic Hardware

    Together with the first bin a PAPER STACKER is provided to collect the output printed paper. Also this part has an internal step motor to select the path where the paper should be output. See chapter 9 for more details. ____________________________________________________________________________________________ LA400 Multiprinter 1. 7 ER-LA400-SV...
  • Page 16 Draft mode: Letter Quality mode: Dot Graphic Mode: 2100 1660 1245 2100 2100 2100 2100 • • THROUGHPUT PPH ECMA 132 PPH= pages per hour Fanfold Letter Draft: Letter Quality: Graphic: Spread 17: Spead 10: ____________________________________________________________________________________________ LA400 Multiprinter 1. 8 ER-LA400-SV...
  • Page 17 Basic: 2, 3, 4, 6, 8, 12 Incremental n/60 n/72 n/180 n/216 n/360 • • BIT IMAGE (DOT GRAPHICS) Horizontal: 60, 80, 90, 120, 180, 240, 360 Vertical: 60, 72, 144, 180 ____________________________________________________________________________________________ LA400 Multiprinter 1. 9 ER-LA400-SV...
  • Page 18 1 + 5 WEIGHT (original) minimum 55 gr/M² 13.75 lbs maximum 150 gr/M² 37.5 lbs WEIGHT (Multicopy) copies minimum 45 gr/M² 11.25 lbs maximum 75 gr/M² 18.75 lbs carbon maximum 35 gr/M² 8.75 lbs ____________________________________________________________________________________________ LA400 Multiprinter 1. 10 ER-LA400-SV...
  • Page 19 Capacity of 30 envelopes max., Size US 6, US 10 ASF 1 BIN LENGTH minimum 114 mm 4.5" ASF 2 BIN LENGTH minimum 216 mm 8.5" ASF 3 BIN LENGTH minimum 267 mm 10.5" ____________________________________________________________________________________________ LA400 Multiprinter 1. 11 ER-LA400-SV...
  • Page 20 + T16 °C to + 24 °C Humidity Range 40% RH to 60% RH (not condensing) • • NOISE Sound Pressure level bystander position according to ISO 7779: Printing: less than 56 dBA Stand-by: less than 45 dBA ____________________________________________________________________________________________ LA400 Multiprinter 1. 12 ER-LA400-SV...
  • Page 21 - CSA Certification to CSA C22.2 No 950 - Approval to EN60950 and IEC with a GS Mark - Nordik deviations to EN60950: EMKO-TSE (74-SEC) Energy Consumption - EPA compliant with a power consumption of max 30W in stand-by ____________________________________________________________________________________________ LA400 Multiprinter 1. 13 ER-LA400-SV...
  • Page 22 The Operator Panel of this printer has the overall appearance of a plane surface as shown in the next figure 1.4 with the following: - 1 LCD Display with 16 alpha-numeric digit - 9 Push Buttons - 8 LED indicators (3 for status and 5 for paper paths) ____________________________________________________________________________________________ LA400 Multiprinter 1. 14 ER-LA400-SV...

  • Page 23: Chapter 2 Paper Handling Overview

    Maintenance Manual Paper Handling Overview _______________________________________________________________________________________ Chapter 2 Paper Handling Overview ____________________________________________________________________________________________ LA400 Multiprinter 2. 1 ER-LA400-SV...

  • Page 24: Introduction

    (PATH 2), the second from the rear in push mode with the optional push tractor unit installed in the rear position (PATH 2). For this path, the fanfolds exit (once at a time) from from the rear paper slot (PATH 5). ____________________________________________________________________________________________ LA400 Multiprinter 2. 2 ER-LA400-SV...
  • Page 25 On the table 2.1 it is possible to find all the Paper Path Types that can be selected from the Control Panel in according to the printer Path Configurations. ____________________________________________________________________________________________ LA400 Multiprinter 2. 3 ER-LA400-SV...

  • Page 26: Paper Handling Architecture

    Fig. 2.1 Paper Handling Architecture PAPER PATH TYPES PAPER PATH CONFIGURATIONS FROM CONTROL PANEL MANUAL PUSH FRONT PUSH REAR PUSH FRONT+REAR PULL PUSH+PULL ASF1 ASF2 ASF3 ASF1+ASF2 ASF2+ASF3 ASF1+ASF2+ASF3 Table 2.1 Printer Path Configurations ____________________________________________________________________________________________ LA400 Multiprinter 2. 4 ER-LA400-SV...

  • Page 27: Paper Path Configurations

    There is no the Overlay mode of manual with any fanfold modules. • For the REAR PUSH mode, the fanfold must have a maximum thickness of 0.35 mm instead of 0.52 mm of the other paths (see chapter 1.4 for major details). ____________________________________________________________________________________________ LA400 Multiprinter 2. 5 ER-LA400-SV...

  • Page 28: Front Load Push-Mode

    Maintenance Manual Paper Handling Overview _______________________________________________________________________________________ Figure 2.2 Front Load Push-Mode Figure 2.3 Rear Load Push-Mode ____________________________________________________________________________________________ LA400 Multiprinter 2. 6 ER-LA400-SV...

  • Page 29: Rear (Bottom) Load Pull-Mode

    Maintenance Manual Paper Handling Overview _______________________________________________________________________________________ Figure 2.4 Rear (Bottom) Load Pull-Mode Figure 2.5 Front Load Push-Pull Mode with two tractors ____________________________________________________________________________________________ LA400 Multiprinter 2. 7 ER-LA400-SV...

  • Page 30: Dual Fanfold Configurations

    For the REAR PUSH mode, the fanfold must have a maximum thickness of 0.35 mm instead of 0.52 mm of the other paths (see chapter 1.4 for major details). Figure 2.6 Front Load Push-Mode and Rear Load Push-Mode with two tractors ____________________________________________________________________________________________ LA400 Multiprinter 2. 8 ER-LA400-SV...

  • Page 31: Asf Configuration

    The ASF can co-exists with both the push-pull tractor units (front and rear) installed. The 1st BIN can accept also envelopes. See chapter 1.4 for details regarding the paper specifications. Figure 2.7 Automatic Sheet Feeder ____________________________________________________________________________________________ LA400 Multiprinter 2. 9 ER-LA400-SV...

  • Page 32: Chapter 3 Electronic Hardware Overview

    Maintenance Manual Electronic Hardware Overview ____________________________________________________________________________________________ Chapter 3 Electronic Hardware Overview ____________________________________________________________________________________________ LA400 Multiprinter 3. 1 ER-LA400-SV...

  • Page 33: Hardware General Overview

    One for 230 Vac • Operator panel board • LCD Display board plus some optional boards as: • Serial interface board • Optionally expansion board • Font cartridge board • Paper Stacker board Figure 3.1 Electronics Structure ____________________________________________________________________________________________ LA400 Multiprinter 3. 2 ER-LA400-SV...

  • Page 34: Electronic Architecture

    The controller unit of LA400 printer is implemented on one board. This board can be splitted in two sections at functional level: • The first section is a digital one, mainly dedicated to provide the physical and logical interface between the host and the engine mechanical/electrical feature. •...

  • Page 35: Controller Overview

    Software interval timer (16 bits). • Address block wait insert function and RAS/CAS switching timing generate function. • DRAM and pseudo-SRAM refresh function. • Stanby function (STOP mode and HALT mode). • Built-in clock generator. ____________________________________________________________________________________________ LA400 Multiprinter 3. 4 ER-LA400-SV...

  • Page 36: V55Pi Internal Block Architecture

    Maintenance Manual Electronic Hardware Overview ____________________________________________________________________________________________ 3.1.2.1.1 µ µ P V55PI Internal Block Architecture The figure 3.3 shows the internal architecture of the µprocessor. Figure 3.3 Microprocessor Internal Block Diagram ____________________________________________________________________________________________ LA400 Multiprinter 3. 5 ER-LA400-SV...

  • Page 37: V55Pi Block Features

    Watch-Dog Timer (WDT) An 8-bit watchdog timer is incorporated to detecct an inadvertent overrun and system errors. The WDT is equipped with the WDTOUT pin to externally notify the generation of a watchdog timer interrupt. ____________________________________________________________________________________________ LA400 Multiprinter 3. 6 ER-LA400-SV...
  • Page 38 A 16-bit software interval timer is incorporated as one for software timer or clock functions. It can set interval interrupts by selecting the input clock (count clock) and setting the software timer counter compare register. ____________________________________________________________________________________________ LA400 Multiprinter 3. 7 ER-LA400-SV...

  • Page 39: Asic

    Reg. 10 - Needles driving Timer 2 value Reg. 11 - Chopper frequency value Timer 3 Reg. 12 - Negative duty cycle inside choppering (Timer 3 value) Reg. 13-14-15 Needles configuration registers (up to 24 bit) ____________________________________________________________________________________________ LA400 Multiprinter 3. 8 ER-LA400-SV...

  • Page 40: Memories

    The logical hardware support are provided on the basic board by the means of specific port on the µprocessor and register on ASIC. This board provides only the physical connection with the line receivers and drivers intergrated circuits. ____________________________________________________________________________________________ LA400 Multiprinter 3. 9 ER-LA400-SV...

  • Page 41: Expansion Bus

    All the driver (excepts for the paper motor) are disable when there are no activities for more than 20 seconds. The next figure shows the blocks structure of the DOE (device oriented electronics). Figure 3.4 DOE Blocks Diagram ____________________________________________________________________________________________ LA400 Multiprinter 3. 10 ER-LA400-SV...

  • Page 42: Reset And Prefault Circuit

    In the next two figures are shown the schematics and the typical vaweforms of this circuit. Typical timing: with +38 V = +10V and with +5V = +4.4V the signal are as point A. TD-TB > 30 msec. TF-TE > 2 msec. Figure 3.5 Reset and Prefault Circuit ____________________________________________________________________________________________ LA400 Multiprinter 3. 11 ER-LA400-SV...
  • Page 43 The driver device is a L293D in which are intergrated four driver with recycle diodes and logic control circuits. The figure below shows the schematic of this circuit. Figure 3.7 Color & Paper Stacker Motors Driving Cicruit ____________________________________________________________________________________________ LA400 Multiprinter 3. 12 ER-LA400-SV...
  • Page 44 The current level control is defined as fixed frequency chopper (depending by the internal oscillator of the controller in a range of 19 to 28 KHhz). The figure below shows the schematics of this circuit. Figure 3.8 Carriage and Paper Motors Driving Cicruit ____________________________________________________________________________________________ LA400 Multiprinter 3. 13 ER-LA400-SV...
  • Page 45 The driver device is a L293D with two resistors in series to the motor coils to prevent the inrush curent. In the figure below a typical application of this device. Figure 3.10 Color and Alternance Motors Driving Cicruit ____________________________________________________________________________________________ LA400 Multiprinter 3. 14 ER-LA400-SV...
  • Page 46 (The number on the diodes represents the pin number of the sensors cable connector, see chapter 8 for major details). - Fanfold Front presence - Fanfold Rear presence - Single Sheet presence - Printhead Temperature Figure 3.12 Sensors Driving Circuit ____________________________________________________________________________________________ LA400 Multiprinter 3. 15 ER-LA400-SV...
  • Page 47 These phases can be repeated more times in the "chopper" mode behaviour. After that, the phase of coil stored energy discharge is activated and allows the power to come-back to the power supply through the D2. Figure 3.14 Print Head Needle Driving Circuit ____________________________________________________________________________________________ LA400 Multiprinter 3. 16 ER-LA400-SV...

  • Page 48: Print Head Needle Current Waveforms

    T1 = Timer 1 T2 = Timer 2 typical T3 = Timer 3 37.5 37.5 T4 = Negative duty cycle inside T3 12.5 12.5 T1+T2+discharge time Energy (mJ) Figure 3.15 Print Head Needle Current Waveforms ____________________________________________________________________________________________ LA400 Multiprinter 3. 17 ER-LA400-SV...

  • Page 49: Power Supply Board

    The Energy Recovery circuit is a block that allows to transfer the not-used energy from the print head circuits on the +38 VDC. Internally there is a swicthing DC-DC converter which maintains the +79 VDC on the proper value. ____________________________________________________________________________________________ LA400 Multiprinter 3. 18 ER-LA400-SV...

  • Page 50: Power Supply Major Block Diagram

    Maintenance Manual Electronic Hardware Overview ____________________________________________________________________________________________ +78 V +38 V +5 V Fig. 3.16 Power Supply Major Block Diagram ____________________________________________________________________________________________ LA400 Multiprinter 3. 19 ER-LA400-SV...

  • Page 51: Controller Sw Overview

    The Platform layer can be easily improved or updated with new modules to support new printer features, options and/or hardware characteristics to generate different printer models or non-standard products. On the figure below, is reported the Software architecture of these printers. ____________________________________________________________________________________________ LA400 Multiprinter 3. 20 ER-LA400-SV...

  • Page 52: Software Architecture

    Maintenance Manual Electronic Hardware Overview ____________________________________________________________________________________________ Figure 3.17 Software Architecture ____________________________________________________________________________________________ LA400 Multiprinter 3. 21 ER-LA400-SV...

  • Page 53: Chapter 4 Removal And Replacement

    Maintenance Manual Removal and Replacement ____________________________________________________________________________________________ Chapter 4 Removal and Replacement ____________________________________________________________________________________________ LA400 Multiprinter 4. 1 ER-LA400-SV...

  • Page 54: Overview

    • A Multimeter for resistance and voltage measurements • Feeler gauge for print head gap adjustment • Dynamometer for carriage and motor belts adjustment • Slender spring hook • Set of fastener loop self-lock ____________________________________________________________________________________________ LA400 Multiprinter 4. 2 ER-LA400-SV...

  • Page 55: Operator Panel Boards

    NOTE : Procedure with an asterisk require ADJUSTMENT PROCEDURE (see chapter 5) All the spare parts available on logistic are reported in the specific Illustrated Parts Catalog P.N.: ER-LA400-IP. REMARK. In the following chapters, the steps of removal procedures are labeled in the corresponding figures. ____________________________________________________________________________________________ LA400 Multiprinter 4. 3 ER-LA400-SV...
  • Page 56 (located on plastic tractor sides) that block the tractor group on it. 4) Remove the tractor unit by pulling it downward. Replace the tractor group following the above instructions in reverse order. Figure 4.1 Push Front Tractor Group removal ____________________________________________________________________________________________ LA400 Multiprinter 4. 4 ER-LA400-SV...

  • Page 57: Operator Panel Boards

    7) Remove the operator panel board from the LCD display board by acting on the two plastic spacers catches that retain the boards together. Replace the operator panel boards group following the above instructions in reverse order. Figure 4.2 Operator Panel Parts removal ____________________________________________________________________________________________ LA400 Multiprinter 4. 5 ER-LA400-SV...

  • Page 58: Print Head

    6) Remove the printhead. Replace the Print Head following the above instructions in reverse order. NOTICE : Before securing the screw, push the P.H. to its inside stop position. No adjustment is required. Figure 4.3 Printhead Removal ____________________________________________________________________________________________ LA400 Multiprinter 4. 6 ER-LA400-SV...

  • Page 59: Front Cover Parts

    6) Extract the magnet interlock from the front cover by simply pulling it out of the cover. Replace the Main Front Cover Parts following the above instructions in reverse order. Figure 4.4 Main Front Cover Parts ____________________________________________________________________________________________ LA400 Multiprinter 4. 7 ER-LA400-SV...

  • Page 60: Rear Cover Parts

    5) Extract the paper stacker covers by simply unhooking them from the main rear cover. 6) Extract the paper knob by simply pulling it out from the platen axis. Replace the Main Rear Cover Parts following the above instructions in reverse order. Figure 4.5 Main Rear Cover Parts ____________________________________________________________________________________________ LA400 Multiprinter 4. 8 ER-LA400-SV...

  • Page 61: Serial Interface Board

    2) Unscrew the two screws securing the serial interface board to the base assy. 3) Remove the the Serial Interface Board by simply extracting it from the main board connector. Figure 4.6 Serial Interface Board ____________________________________________________________________________________________ LA400 Multiprinter 4. 9 ER-LA400-SV...

  • Page 62: Main Board

    7) Unscrew the two screws fixing the metal plate on the parallel connector and remove it. Replace the Main Rear Cover Parts following the above instructions in reverse order paying attention to the rear horizontal guides and to its bottom shield. Figure 4.7 Main Board ____________________________________________________________________________________________ LA400 Multiprinter 4. 10 ER-LA400-SV...

  • Page 63: Power Supply Board

    6) Unplug the connector from the main board and gently extract the power supply board from the printer. Replace the power supply board following the above instructions in reverse order paying attention to the rear horizontal guides. Figure 4.8 Power Supply Board ____________________________________________________________________________________________ LA400 Multiprinter 4. 11 ER-LA400-SV...

  • Page 64: Ribbon Motor

    7) Remove the pivot assy. Replace the ribbon motor assy and the left support parts following above instructions in reverse order. Figure 4.9 Ribbon Motor and left cartridge support ____________________________________________________________________________________________ LA400 Multiprinter 4. 12 ER-LA400-SV...

  • Page 65: Aga Motor

    Replace the AGA motor following the above instructions in reverse order. NOTICE : Before tighteing the motor screws, verify the correct and free movement of the AGA gears. Run the AGA calibration procedure to verify the correct AGA marker position. Figure 4.10 AGA Motor ____________________________________________________________________________________________ LA400 Multiprinter 4. 13 ER-LA400-SV...

  • Page 66: Aga Support And T/F Lever

    Replace the AGA support and T/F lever following the above instructions in reverse order. NOTICE: Put the AGA marker position in the same previous position. Run the AGA calibration procedure to verify the correct AGA marker position. Figure 4.11 Aga Support ans T/F Lever ____________________________________________________________________________________________ LA400 Multiprinter 4. 14 ER-LA400-SV...

  • Page 67: Carriage Motor

    12) Remove the carriage motor assy. Replace the carriage motor assy following the above instructions in reverse order. NOTICE : The carriage motor replacement requires an appropriate carriage belt adjustment (refer to chapter 5). Figure 4.12 Carriage Motor ____________________________________________________________________________________________ LA400 Multiprinter 4. 15 ER-LA400-SV...

  • Page 68: Bail Assy

    4) Rotate the bail assy toward its front side to unhook it from the left and right mechanical frames. 5) Remove the bail assy after having released the two springs holding it to the frame. Replace the bail assy following the above instructions in reverse order. Figure 4.13 Bail Assembly ____________________________________________________________________________________________ LA400 Multiprinter 4. 16 ER-LA400-SV...

  • Page 69: Cut Sheet Assy

    3) Gently remove the cut sheet assy by simply extracting it from the mechanical assy from the left side. Replace the cut sheet assy following the above instructions in reverse order. Figure 4.14 Cut Sheet Assembly ____________________________________________________________________________________________ LA400 Multiprinter 4. 17 ER-LA400-SV...

  • Page 70: Upper Feeder Assy

    7) Remove the upper feeder assy by extracting it from the left side of the mechanical assy rotating the feeder assy on the left side slightly to the front. Replace the upper feeder assy following the above instructions in reverse order. Figure 4.15 Upper Feeder Assy ____________________________________________________________________________________________ LA400 Multiprinter 4. 18 ER-LA400-SV...

  • Page 71: Platen Assy

    Replace the platen assy following the above instructions in reverse order. NOTICE: the platen assy replacement requires an appropriate print head gap adjustment procedure (refer to chapter 5). Figure 4.16 Platen Assy ____________________________________________________________________________________________ LA400 Multiprinter 4. 19 ER-LA400-SV...

  • Page 72: Lower Feeder Assy

    13) Remove the lower feeder assy by simply extracting it from the mechanism. Replace the lower feeder assy following the above instructions in reverse order. NOTICE : the lower feeder assy replacement requires an appropriate carriage and paper belts adjustment procedure (refer to chapter 5). ____________________________________________________________________________________________ LA400 Multiprinter 4. 20 ER-LA400-SV...
  • Page 73 Maintenance Manual Removal and Replacement ____________________________________________________________________________________________ Figure 4.17 Lower Feeder Assy ____________________________________________________________________________________________ LA400 Multiprinter 4. 21 ER-LA400-SV...

  • Page 74: Carriage Assy

    NOTICE: the carriage assy replacement requires the appropriate print head gap and carriage belt adjustment procedures (refer to chapter 5). Slowly introduce the front bar into the carriage holes paying attention to the oil-felt inside it. Figure 4.18 Carriage Assy ____________________________________________________________________________________________ LA400 Multiprinter 4. 22 ER-LA400-SV...

  • Page 75: Sensor Assy

    10) Unplug the connector from the main board and extract the cable from its cable retainers located in the rear part of the mechanical assy. Replace the sensor assy following the above instructions in reverse order. Figure 4.19 Sensor Assy ____________________________________________________________________________________________ LA400 Multiprinter 4. 23 ER-LA400-SV...

  • Page 76: Mechanical Assy

    5) Cut the two plastic self-locked strips retaining the mechanical blocks on the base assy and remove the mechanical assy. 6) Pay attention to the paper position mylar on the base assy. Replace the mechanical assy following the above instructions in reverse order. Figure 4.20 Mechanical Assy ____________________________________________________________________________________________ LA400 Multiprinter 4. 24 ER-LA400-SV...

  • Page 77: Paper Motor

    Replace the paper motor following the above instructions in reverse order. NOTICE: the paper motor replacement requires an appropriate paper belt adjustment procedure (refer to chapter 5). Figure 4.21 Paper Motor ____________________________________________________________________________________________ LA400 Multiprinter 4. 25 ER-LA400-SV...

  • Page 78: Friction Bar Assy

    Replace the friction bar assy following the above instructions in reverse order. NOTICE: the friction bar assy must have a proper position coherently with the sensor tuning values stored in NVM. Figure 4.22 Friction Bar Assy ____________________________________________________________________________________________ LA400 Multiprinter 4. 26 ER-LA400-SV...

  • Page 79: Chapter 5 Adjustments

    Maintenance Manual Adjustments ____________________________________________________________________________________________ Chapter 5 Adjustments ____________________________________________________________________________________________ LA400 Multiprinter 5. 1 ER-LA400-SV...

  • Page 80: Overview

    ____________________________________________________________________________________________ 5.1 Overview This section describes the adjustment procedures for the basic printer. A specific section of the Digital LA400 Multiprinter User Manual is dedicated to the User Adjustment (chapter 9). 5.1.1 Carriage Belt This adjustment is required only if the carriage belt or parts related to the replacement of this are removed (pulley assy, carriage motor assy, ect.).

  • Page 81: Paper Belt

    2) Apply the specified load on the hob of the lever with inward orientation as figure 5.2 and securing the screws to stretch the paper belt. First tighten the screw indicated as A). Figure 5.2 Paper Belt Adjustment ____________________________________________________________________________________________ LA400 Multiprinter 5. 3 ER-LA400-SV...

  • Page 82: Print Head Gap

    5) At normal operation, with a 80 gr/M² single sheet paper, the AGA marker must be at "1" position. Run, if it necessary, the FACT. AUTO GAP procedure in next chapter to verify the correct AGA position. ____________________________________________________________________________________________ LA400 Multiprinter 5. 4 ER-LA400-SV...

  • Page 83: Print Head Adjustment

    Maintenance Manual Adjustments ____________________________________________________________________________________________ Figure 5.3 Print Head Adjustment ____________________________________________________________________________________________ LA400 Multiprinter 5. 5 ER-LA400-SV...

  • Page 84: Chapter 6 Service Maintenance

    Maintenance Manual Service Maintenance ____________________________________________________________________________________________ Chapter 6 Service Maintenance ____________________________________________________________________________________________ LA400 Multiprinter 6. 1 ER-LA400-SV...

  • Page 85: Overview

    (Close to high temperatures or humidity, near heat sources, dusty areas, areas where gas is generated, exposed to direct sunlight) • Has the printer a good configuration ? Please refer to the User Manual for more details on all these items. ____________________________________________________________________________________________ LA400 Multiprinter 6. 2 ER-LA400-SV...

  • Page 86: Cleaning

    See chapter 1.3 and the User Manual for more details. 6.2.4 Consumables Digital Equipment Co. recommends to use only its original consumables with original packaging. I In this way, a proper utilization of the printer at quality level and reliability stated in the product characteristics will be assured.

  • Page 87: Troubleshooting Guide

    LCD. 6.3.2 Printer Errors Some errors can be displayed by the printer. These errors can be divided into three main groups: • Status errors • Recoverable errors • Not recoverable errors ____________________________________________________________________________________________ LA400 Multiprinter 6. 4 ER-LA400-SV...

  • Page 88: Status Errors

    Press PAUSE key to reset the error condition. • The display shows: PRINT INTEGRITY . Cause: Carriage is blocked or lost its position. Action: Check if the carriage assy movement is free. Press PAUSE key to reset the error condition. ____________________________________________________________________________________________ LA400 Multiprinter 6. 5 ER-LA400-SV...

  • Page 89: Not Recoverable Errors

    Typically all these problems appears if an internal error in the BOOSTRAP or normal operation phases is detected. If after powering-on the printer the problem appears again, contact your nearest Digital Customer Service Center. In the BOOSTRAP phase the following messages can be displayed.

  • Page 90: Unrecoverable Error Display Messages

    ENG FLT Engine master error (init phase) ENG FLT As above (p.h. energy phase) 2 ÷ 7 ENG FLT As above (T.B.D.) ENG FLT As above (paper stacker) Table 6.1 Unrecoverable Error Display Messages ____________________________________________________________________________________________ LA400 Multiprinter 6. 7 ER-LA400-SV...

  • Page 91: Power Malfunctions

    An overload is present on secondary voltages. Actions: If the voltages are corrected, check for electromechanical parts impedance (refer to chapter 8). Replace the defective electromechanical part. If the impedances are correct, replace the main board. ____________________________________________________________________________________________ LA400 Multiprinter 6. 8 ER-LA400-SV...
  • Page 92 + 38 V CONNECTOR PIN 9 + 38 V CONNECTOR PIN 10 + 38 V (a) KATODE DIODE D1 + 79 V CONNECTOR PIN 12 FAN CONTROL (not used) Figure 6.1 Power Supply Test Points ____________________________________________________________________________________________ LA400 Multiprinter 6. 9 ER-LA400-SV...

  • Page 93: Self-Test

    Refer to the faulty probability table to correct any printing problem. SELF TEST PRINTOUT CONFIGURATION: FIRMWARE: Ver. B2.3-02 CONTROLLER: 78xxxxxx Ver. B2.3 GENERATOR: 78xxxxxx Ver: 1.0 Draft !"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_abc !"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_abcd "#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_abcde #$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_abcdef Figure 6.2 Self-Test Printout ____________________________________________________________________________________________ LA400 Multiprinter 6. 10 ER-LA400-SV...

  • Page 94: Hex-Dump

    RAM cartridge on which you can save the whole NVM. This cartridge can be used to inizialize other printers with the same seetings. (See Appendix A of the User Manual for more details). ____________________________________________________________________________________________ LA400 Multiprinter 6. 11 ER-LA400-SV...

  • Page 95: Faulty Probability Guide

    Install a new one. CAUSE: The power supply board may be faulty. ACTION: Check the voltages. Install a new one. CAUSE: The gap between P.H. and platen is not correct. ACTION: Check for the platen adjustment procedure. ____________________________________________________________________________________________ LA400 Multiprinter 6. 12 ER-LA400-SV...
  • Page 96 Check for solenoid impedance (see chapter 8) Replace t/f solenoid. CAUSE: The connection of the motor and main board is bad. ACTION: Verify the connection. Replace the cable. CAUSE: The main board may be faulty. ACTION: Install a new one. ____________________________________________________________________________________________ LA400 Multiprinter 6. 13 ER-LA400-SV...
  • Page 97 Replace the cable or the o.p. board or the display. CAUSE: The ribbon sensor is faulty. ACTION: Check for the ribbon sensor action through the pivot assy. Replace the pivot assy. Replace the sensors cable group. Replace the ribbon motor assy. ____________________________________________________________________________________________ LA400 Multiprinter 6. 14 ER-LA400-SV...
  • Page 98 Check if the sensor cable is correctly inserted in the main board. Check if the sensors cable is correctly installed in the mechanical without short circuit. Check for the correct optical sensors diode impedance (about 1 K Ω ) Refer to chapter 8. ____________________________________________________________________________________________ LA400 Multiprinter 6. 15 ER-LA400-SV...

  • Page 99: Service Tests And Adjustments

    ----------- -------- ( 3) DATA 2 -------- ( 6) DATA 5 -------- ( 9) DATA 8 FAULT (32) ----------- -------- ( 4) DATA 3 -------- ( 7) DATA 6 DEC P/N 29-27887-01 Figure 6.5 Parallel I/F Loop-Back Diagrams ____________________________________________________________________________________________ LA400 Multiprinter 6. 16 ER-LA400-SV...

  • Page 100: Execution Of The Service Adjustments

    Enter the PROG. GAP OFFSET adjustment by pressing the key and a number from 12 to -12 will be displayed. No paper will be required. Proceed as above to set and store the right value. ____________________________________________________________________________________________ LA400 Multiprinter 6. 17 ER-LA400-SV...
  • Page 101 With NO PAPER installed, enter the Pap. sensor tune adjustment by pressing the key, then press the Sel/Save key to run the adjustment, Tuning sensor... will be displayed. Press Exit key to return to standard procedures. ____________________________________________________________________________________________ LA400 Multiprinter 6. 18 ER-LA400-SV...

  • Page 102: Execution Of The Service Tests

    Parallel I/F (see loop-back diagram at chapter 6.4.2). Sel/Save key starts the test. If the loop-back connector is not inserted or the test fails Loop-back failed will be displayed. If it succeds Loop-back passed will be displayed. ____________________________________________________________________________________________ LA400 Multiprinter 6. 19 ER-LA400-SV...

  • Page 103: Service Test

    Prints a continouous line in line 51 (6 LPI) from the first continuous line in line 1 to check the paper movement. See step B of item 5. A forward paper movement is performed to reach the 72th line and a pattern as point 1 is printed. ____________________________________________________________________________________________ LA400 Multiprinter 6. 20 ER-LA400-SV...
  • Page 104 Maintenance Manual Electromechanical Devices ____________________________________________________________________________________________ Chapter 7 Electromechanical Devices ____________________________________________________________________________________________ LA400 Multiprinter 7. 1 ER-LA400-SV...

  • Page 105: Print Head

    1000 Ω ± 6% Thermal sensor measured at 25° (see table below) Temperature (°C) Resistance (Ω) 1000 1039 1121 1206 1295 1387 1483 1583 1687 1794 1905 2020 2138 2260 Table 7.1 Print Head Resistance/Temperature Characteristics ____________________________________________________________________________________________ LA400 Multiprinter 7. 2 ER-LA400-SV...

  • Page 106: Print Head Pinout

    + 38 Volt Pin20 Needle N. 3 Pin10 Needle N. 19 Pin21 + 38 Volt Pin11 Needle N. 17 Pin22 Needle N. 1 Table 7.2 Print head pin assignment Figure 7.1 Print head pinout ____________________________________________________________________________________________ LA400 Multiprinter 7. 3 ER-LA400-SV...

  • Page 107: Carriage Motor

    20 Vpeak ± 20% With motor shaft at the constant speed of 1000 RPM MECHANICAL REQUIREMENTS Step angle 1.8° The pin connector assignment is shown in fig. 7.3 Fig 7.2 Carriage motor pin connector assignment ____________________________________________________________________________________________ LA400 Multiprinter 7. 4 ER-LA400-SV...

  • Page 108: Paper Motor Pin Connector Assignment

    29 Vpeak ± 20% With motor shaft at the constant speed of 1000 RPM MECHANICAL REQUIREMENTS Step angle 1.8° The pin connector assignment is shown in fig. 7.4. Fig 7.3 Paper motor pin connector assignment ____________________________________________________________________________________________ LA400 Multiprinter 7. 5 ER-LA400-SV...

  • Page 109: Aga Motor Pin Connector Assignment

    15.5 Vpeak ± 20% With motor shaft at the constant speed of 1000 RPM MECHANICAL REQUIREMENTS Step angle 3.6° The pin connector assignment is shown in fig. 7.5 Fig 7.4 AGA motor pin connector assignment ____________________________________________________________________________________________ LA400 Multiprinter 7. 6 ER-LA400-SV...

  • Page 110: Ribbon Motor Pin Connector Assignment

    21 Vpeak ± 20% With motor shaft at the constant speed of 1000 RPM MECHANICAL REQUIREMENTS Step angle 7.5° The pin connector assignment is shown in fig. 7.6 Fig 7.5 Ribbon motor pin connector assignment ____________________________________________________________________________________________ LA400 Multiprinter 7. 7 ER-LA400-SV...

  • Page 111: Alternance Motor

    The No load current is the motor armature supply current at no load speed. Back Electromotive Force 1.7 V ± 10% The back electromotive force is the voltage measured across the terminal, carrying the motor shaft to a constant speed of 1000 rpm. ____________________________________________________________________________________________ LA400 Multiprinter 7. 8 ER-LA400-SV...

  • Page 112: Color Motor Pin Connector Assignment

    With rated current applied to both phases (series). MECHANICAL REQUIREMENTS Travel 18 mm Incremental unit 0.0846 mm ± 10% The pin connector assignment is shown in fig. 7.7 Fig 7.6 Color motor pin connector assignment ____________________________________________________________________________________________ LA400 Multiprinter 7. 9 ER-LA400-SV...

  • Page 113: Stacker Motor Pin Connector Assignment

    17.5 Vpeak ± 20% With motor shaft at the constant speed of 1000 RPM MECHANICAL REQUIREMENTS Step angle 15° The pin connector assignment is shown in fig. 7.8 Fig 7.7 Stacker motor pin connector assignment ____________________________________________________________________________________________ LA400 Multiprinter 7. 10 ER-LA400-SV...

  • Page 114: Sensors Cable

    ____________________________________________________________________________________________ 7.1.3 Cables 7.1.3.1 Sensors Cable This cable is composed of five optical sensors (two interrupter and three reflective ones). The figure below shows the electrical connections of this cable. Fig. 7.8 Sensors Cable ____________________________________________________________________________________________ LA400 Multiprinter 7. 11 ER-LA400-SV...

  • Page 115: Alternance Cable

    7.1.3.2 Alternance Cable The figure below shows the electrical connections of this cable. Fig. 7.9 Alternance Cable 7.1.3.3 Paper Stacker Cable The figure below shows the electrical connections of this cable. Fig. 7.10 Paper Stacker Cable ____________________________________________________________________________________________ LA400 Multiprinter 7. 12 ER-LA400-SV...

  • Page 116: Operator Panel Cable

    Maintenance Manual Electromechanical Devices ____________________________________________________________________________________________ 7.1.3.4 Operator Panel Cable The figure below shows the electrical connections of this cable. Fig. 7.11 Operator Panel Cable ____________________________________________________________________________________________ LA400 Multiprinter 7. 13 ER-LA400-SV...
  • Page 117 Maintenance Manual Options ____________________________________________________________________________________________ Chapter 8 Options ____________________________________________________________________________________________ LA400 Multiprinter 8. 1 ER-LA400-SV...

  • Page 118: Automatic Sheet Feeder

    5) Paper Support for output paper 6) Metal hooks for ASF installation on basic mechanism 7) Electrical finger-board for ASF electrical connection 8) Output Stacker metal supports 9) Cable connection ASF-Output Stacker Figure 8.1 1st ASF Components ____________________________________________________________________________________________ LA400 Multiprinter 8. 2 ER-LA400-SV...

  • Page 119: Asf And Stacker Blocks Diagram

    As described in chapter 3, the ASIC integrated circuit drives the mechanical option connector lines via its internal serial synchronous interface. The blocks diagram of the STACKER/ASF option isa shown below. Figure 8.2 ASF and Stacker Blocks Diagram ____________________________________________________________________________________________ LA400 Multiprinter 8. 3 ER-LA400-SV...

  • Page 120: Asf Installation (Rear View)

    To remove the output stacker, open the two metal supports of the Output Stacker (item 8 of fig. 8.1) by acting on the two proper black levers and extracting it. Figure 8.3 ASF Installation (rear view) ____________________________________________________________________________________________ LA400 Multiprinter 8. 4 ER-LA400-SV...

  • Page 121: Second Bin Asf Installation

    Put a flat screwdriver between these parts to un-hook them and, at the same time, extract the second BIN from the first one. Follow the same procedure for the removal of the second bin from the third one. Figure 8.4 Second Bin ASF Installation ____________________________________________________________________________________________ LA400 Multiprinter 8. 5 ER-LA400-SV...

  • Page 122: Color Motor Installation

    1) Insert the color motor connector in the plug present on the left side of print head support. 2) Insert the color motor assy in its position on the carriage assy. 3) Tighten the two screws. Figure 8.5 Color Motor Installation ____________________________________________________________________________________________ LA400 Multiprinter 8. 6 ER-LA400-SV...

  • Page 123: Color Ribbon Installation

    3) Gently push down the ribbon plastic bracket over the motor plastic braket guide until it "clicks" into place. 4) To remove the color ribbon a slightly pree on the lever before extracting the ribbon plastic bracket. Figure 8.6 Color Ribbon Installation ____________________________________________________________________________________________ LA400 Multiprinter 8. 7 ER-LA400-SV...
  • Page 124 Maintenance Manual HW Setting & FW Installation ____________________________________________________________________________________________ Chapter 9 HW Setting & FW Installation ____________________________________________________________________________________________ LA400 Multiprinter 9. 1 ER-LA400-SV...

  • Page 125: Serial Interface Board

    The FirmWare installed on these printers is composed of two 4 MB dual in line type eproms installed as indicated in figure 9.1. The eprom indicated as U50 is the CONTROLLER FW. The eprom indicated as U108 is the GENERATOR FW. ____________________________________________________________________________________________ LA400 Multiprinter 9. 2 ER-LA400-SV...
  • Page 126 Maintenance Manual HW Setting & FW Installation ____________________________________________________________________________________________ Figure 9.1 Washer for Frame-DC Ground Insulation Figure 9.2 Jumper and FW on Main Board ____________________________________________________________________________________________ LA400 Multiprinter 9. 3 ER-LA400-SV...
  • Page 127 Maintenance Manual HW Setting & FW Installation ____________________________________________________________________________________________ Figure 9.3 Jumper on Operator Panel Board Figure 9.4 Jumper on Serial Interface Board ____________________________________________________________________________________________ LA400 Multiprinter 9. 4 ER-LA400-SV...

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