Digital Equipment LA400 Service Manual Download Page 45

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Maintenance Manual Electronic Hardware Overview
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RIBBON MOTOR

The ribbon movement is obtained via a 7.5 degrees bipolar step motor.

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AGA MOTOR

The ribbon movement is obtained via a 3.6 degrees bipolar step motor.

For both the motors, the driver device is a L6219 in which are intergrated a current
controller, the recycle diodes and the power drivers.
In the figure below is indicated the internal block diagram of this device.

Figure 3.9 Ribbon and AGA Motors Driving Cicruit

••

ALTERNANCE MOTORS

The alternance motor (tractor/friction switching) is a DC motor.
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

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LA400 Multiprinter 3. 14 ER-LA400-SV

Summary of Contents for LA400

Page 1: ...Service Manual Order Number ER LA400 SV 1 ...

Page 2: ...cation No ER LA400 SV 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 ____________________________________________________________________________________________ LA400 Multi...

Page 3: ...cal Assy 1 6 1 2 3 1 1 Tractor Unit Assy 1 6 1 2 3 2 Print Head 1 6 1 2 3 3 Cabinet 1 6 1 2 3 4 Electronic Hardware 1 7 1 2 3 5 Inked Ribbon Cartridge 1 7 1 2 3 6 Mechanical Options 1 7 1 3 Printer Technical Specifications 1 8 CHAPTER 2 PAPER HANDLING OVERVIEW 2 1 Introduction 2 2 2 1 1 Paper Handling Architecture 2 2 2 1 2 Paper Path Configurations 2 5 2 1 2 1 Basic Configuration 2 5 2 1 2 2 Dual...

Page 4: ...APTER 4 REMOVAL AND REPLACEMENT 4 1 Overview 4 2 4 2 Recommended Hand Tools and Equipment 4 2 4 3 ORU Order of Access 4 3 4 3 1 Front Push Pull Tractor Group 4 4 4 3 2 Operator Panel Boards 4 5 4 3 3 Print Head 4 6 4 3 4 Front Cover Parts 4 7 4 3 5 Rear Cover Parts 4 8 4 3 6 Serial I F Board 4 9 4 3 7 Main Board 4 10 4 3 8 Power Supply Board 4 11 4 3 9 Ribbon Motor 4 12 4 3 10 AGA Motor 4 13 4 3 1...

Page 5: ...ubleshooting Guide 6 4 6 3 1 Initializing Phase 6 4 6 3 2 Printer Errors 6 4 6 3 2 1 Status Errors 6 5 6 3 2 2 Recoverable Errors 6 5 6 3 2 3 Not Recoverable Errors 6 6 6 3 3 Power Malfunctions 6 8 6 3 3 1 P S Troubleshooting Guide 6 8 6 3 4 Self Test 6 10 6 3 5 Hex Dump 6 11 6 3 6 Faulty Probability Guide 6 12 6 4 Service Tests and Adjustments 6 16 6 4 1 Introduction 6 16 6 4 2 Loop back Coonecto...

Page 6: ...Motor 7 8 7 1 2 6 ASF Motor 7 9 7 1 2 7 Color Motor 7 9 7 1 2 8 Stacker Motor 7 11 7 1 3 Cables 7 12 7 1 3 1 Sensors Cable 7 12 7 1 3 2 Alternance Cable 7 13 7 1 3 3 Paper Stacker Cable 7 13 7 1 3 4 Operator Panel Cable 7 14 CHAPTER 8 OPTIONS 8 1 Overview 8 2 8 1 1 Automatic Sheet Feeder 8 2 8 1 2 Color Motor 8 6 CHAPTER 9 HW SETTING FW INSTALLATION 9 1 Overview 9 2 9 1 1 Hardware Setting 9 2 9 1 ...

Page 7: ... 9 Ribbon and AGA Motors Driving Circuits 3 14 3 10 Color and Alternance Motors Driving Circuits 3 14 3 11 ASF Motor Driving Circuit 3 15 3 12 Sensors Driving Circuits 3 15 3 13a b Print Head Behaviour 3 16 3 14 Print Head Needle Drivig Circuit 3 16 3 15 Print Head Needle Current Waveforms 3 17 3 16 Power Supply Major Block Diagram 3 19 3 17 Software Architecture 3 21 4 1 Front Push Tractor Group ...

Page 8: ...signment 7 6 7 5 Ribbon Motor pin connector assignment 7 7 7 6 Color Motor pin connector assignment 7 10 7 7 Stacker Motor pin connector assignment 7 11 7 8 Sensors Cable 7 12 7 9 Alternance Cable 7 13 7 10 Paper Stacker Cable 7 13 7 11 Operator Panel Cable 7 14 8 1 1st ASF Components 8 2 8 2 ASF and Stacker Blocks Diagram 8 3 8 3 ASF Installation rear view 8 4 8 4 Second Bin ASF Installation 8 5 ...

Page 9: ..._____________________________________________________________________________________ Chapter 1 General Overview ____________________________________________________________________________________________ LA400 Multiprinter 1 1 ER LA400 SV ...

Page 10: ...sheets diagrams business or technical graph ics and machine readable texts This printer enters the top segment of the SIDM pinter market and can be a valide and convenient alternative to the low end line printers 1 1 2 Printers Features Summary 24 wire print head Draft print at 400 cps and LQ print at 133 cps High resolution Graphics Printing at 360x360 dpi DEC ANSI Conformance Level 2 IBM Proprin...

Page 11: ... Overview 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: ...______________________ 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: ... lbs 18 Kg 1 2 3 Printer Structure The printer can be described as the complex of the following parts 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 ______________________________________________________________...

Page 14: ...or step motor with a plastic coupler that transmits the axial movement to the plastic print head mask installed on the color ribbon cartridge Another step motors is used for the A G A automatic gap adjustment of the print head movement to have the best perfomance on the paper in use 1 2 3 1 1 Tractor Unit Assy A removable push tractor unit is installed on the printer Inside of it a DC motor switch...

Page 15: ...5 Inked Ribbon Cartridge The ribbon cartridge is installed in different ways according to the ribbon types In case of the black ribbon the cartridge is fixed on both sides on four points Its position is obliquous to the print line to automatically show the complete height of the ribbon in front of print head while printing on the full print line The inked ribbon inside of these cartridges is a con...

Page 16: ...nch DPI dots per inch CPS characters per second DPS dots per second CPI DPI CPS DPS Draft mode 10 60 400 12 60 480 15 60 600 17 120 343 20 120 400 24 120 400 Letter Quality mode 10 180 133 12 180 160 15 180 200 17 180 229 20 180 267 24 180 320 Dot Graphic Mode 60 2100 80 1660 90 1245 120 2100 180 2100 240 2100 360 2100 THROUGHPUT PPH ECMA 132 PPH pages per hour PPH Fanfold ASF Letter Draft 402 330...

Page 17: ... 1 120 24 Draft text 12 cpi 7 3 1 120 24 Draft text 15 cpi 7 1 1 120 16 Draft graphic char 12 0 1 120 30 LQ text 10 cpi 31 5 1 360 24 LQ text 12 cpi 27 3 1 360 24 LQ text 15 cpi 21 3 1 360 24 LQ proportional 42 0 1 360 24 LQ graphic char 36 0 1 360 30 VERTICAL SPACING LPI lines per inch 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 24...

Page 18: ...TH minimum 101 6 mm 4 maximum 558 8 mm 22 THICKNESS maximum 0 635 mm 0 025 COPIES 1 5 1 7 with High Impact Draft selected WEIGHT original minimum 50 gr M 12 5 lbs maximum 120 gr M 30 0 lbs WEIGHT Multicopy first sheet minimum 55 gr M maximum 75 gr M 18 75 lbs other minimum 45 gr M 11 25 lbs maximum 75 gr M 18 75 lbs carbon minimum 14 gr M 3 5 lbs maximum 35 gr M 8 75 lbs FRONT PUSH FANFOLD Frontal...

Page 19: ... Capacity Bin of 120 sheets LENGTH maximum 355 mm 14 THICKNESS maximum 0 35mm 0 0138 COPIES 1 2 WIDTH minimum 88 9 mm 6 maximum 304 8 mm 12 WEIGHT original minimum 60 gr M 15 lbs maximum 150 gr M 37 5 lbs WEIGHT Multicopy with carbon first last sheet minimum 70 gr M 17 5 lbs maximum 80 gr M 20 0 lbs other minimum 35 gr M 8 75 lbs maximum 40 gr M 10 0 lbs carbon approx 25 gr M 6 25 lbs WEIGHT Multi...

Page 20: ...2Hz EU UK Specification 220 240 V 10 15 50 60Hz 2Hz AC Consumption Idle less than 80 VA Printing less than 200 VA ENVIRONMENTAL CONDITIONS The storage and transit environment 1 year of the device and the related expansion module and supplies is Temperature Range 20 C to 60 C 4 F to 140 F Humidity Range 5 RH to 90 RH not condensing The operating environment is Temperature Range 10 C to 40 C 41 F to...

Page 21: ...d 103 Compatibility FCC Rules and Regulations Part 15 Subpart J B Level CISPR 22 EMC Directive EN 55022 Class B EEC 89 336 EN 55082 Environment DEC std 102 Approvals UL Listing to UL 1950 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 _____...

Page 22: ...cle rate estimated for this printer is calculated as follows Paper Movement Print Time Duty Cycle 25 Power on Time Reference usage of 25 duty cycle is assumed on the basis of the following parameters 60 column density 50 line density 40 character density 40 hours week LIFE UNIT 5 years RIBBON 15 Mcharacters Draft standard black type 3 MCharacters Draft each band color type PRINT HEAD 400 M Charact...

Page 23: ..._____________________________________________________________________________________ Chapter 2 Paper Handling Overview ____________________________________________________________________________________________ LA400 Multiprinter 2 1 ER LA400 SV ...

Page 24: ...rtion PATH 1 The cut sheets envelopes or particular paper formats are manually loaded in this path When a sheet is inserted the sensors detect its presence and the printer loads the paper automatically through the cut sheet stand without any other action CONTINUOUS MODULE FANFOLD WITH PUSH TRACTOR UNIT Through a user installable removable push tractor unit the fanfold module can be fed through the...

Page 25: ...al Automatic Sheet Feeder the following feeding positions for single sheets are available ASF1 in the first bin PATH 6 ASF2 in the second bin PATH 7 ASF3 in the third bin PATH 8 Inside the paper output stacker a mechanical switch allows the alternance between the output single sheets which are collected to the output stacker PATH 9 and the fanfold using this exit PATH 5 From control panel it is po...

Page 26: ...PER PATH TYPES PAPER PATH CONFIGURATIONS FROM CONTROL PANEL 1 MANUAL 2 PUSH FRONT 3 PUSH REAR 2 3 PUSH FRONT REAR 4 PULL 2 4 PUSH PULL 6 ASF1 7 ASF2 8 ASF3 6 7 ASF1 ASF2 7 8 ASF2 ASF3 6 7 8 ASF1 ASF2 ASF3 Table 2 1 Printer Path Configurations ____________________________________________________________________________________________ LA400 Multiprinter 2 4 ER LA400 SV ...

Page 27: ... Load Push Mode of the fanfold The figure 2 3 shows the Rear Load Push Mode of the fanfold The figure 2 4 shows the Rear Load Pull Mode of the fanfold alternatively the paper can enter in the bottom feed slot The figure 2 5 shows the Front Load Push Pull Mode of the fanfold IMPORTANT REMARK There is no the Overlay mode of manual with any fanfold modules For the REAR PUSH mode the fanfold must have...

Page 28: ...______________________________________________________________________ Figure 2 2 Front Load Push Mode Figure 2 3 Rear Load Push Mode ____________________________________________________________________________________________ LA400 Multiprinter 2 6 ER LA400 SV ...

Page 29: ..._______________________________________________________ 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: ...lowing the alternance between two fanfolds and related paper paths IMPORTANT REMARK 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 ____________________________________________________________________________________________ L...

Page 31: ...f the Automatic Sheet Feeder and related paper paths 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 ____________________________________________________________________________________________ LA400 Multiprinter 3 1 ER LA400 SV ...

Page 33: ...ur boards as shown in next figure 3 1 Main Controller board Power supply board One for 120 Vac 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 ____________________________________________________________________________________________ LA40...

Page 34: ...digital one mainly dedicated to provide the physical and logical interface between the host and the engine mechanical electrical feature The second one is an analogic one mainly dedicated to drives the motors the print head needles the generation of the Reset power on phase and Prefault power off phase signals On this board are also provided the hardware dedicated to the Operator Panel management ...

Page 35: ...ine input port 11 bits input output port 42 bits DMA controller DMAC configuration possible with a maximum of 4 channels 4 types of DMA transfer modes single transfer demand release single step burst Intelligent DMA modes 1 and 2 Serial interface 2 channels Either asynchronous UART or clocked mode CSI can be selected Parallel interface 8 bits Centronics data input output and general data input out...

Page 36: ..._________________________ 3 1 2 1 1 µ µP 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: ...sfer mode an intelligent DMA ring buffer method and counter control method a next address specify mode and 2 channel operating mode Serial Interface UART CSI This block includes the asynchronous serial interface UART for data synchronization with start stop bit and the clocked serial interface CSI Either interface can be selected for use The CSI can employ either the serial bus interface mode SBI ...

Page 38: ...es from analog MUX Head temperature Single sheet presence Front fanfold presence Rear fanfold presence Board type line Optional voltage reference line Port 7 Carriage motor enable and phase lines Ribbon motor reference and phase lines Port 8 DMA request for clear bit map and needles configuration Realtime Output Port RTOP This block is a reltime output port to be triggered with an interrupt from t...

Page 39: ...ne Reg 7 EPROM Memory Card size selection lines Power enable line The ASIC output also provides these control lines Carriage motor phase lines Paper motor phase lines 2 Provides the support for printing management in agree with the head type For the printing management the ASIC provide the signal and related timing for the DMA management usefull to transfer the needles configuration and to clear t...

Page 40: ...er located on the operator panel specific board On the operator panel board a specific registers are used to drive the LCD the LEDs and the PUSH BUTTONs Port 3 Enable serial synchronous lines Reg 3 Operator Panel control register Latching strobe for the status selected by the means of the O P selection lines in read mode Kind of the data to send to LCD in write mode Read Write type access on O P b...

Page 41: ... partially also in the decoding logic with the hardware register support and the addressing map involved 3 1 3 Mechanical Drivers As indicated in previous chapters analogic part of the board drives the power circuits and generates the Reset and Prefault signals 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 blo...

Page 42: ... rigenerates the signal edges for the logic HCMOS compatibility This circuit is supplied with the analogic or of the two voltages 5 and 38 In this way it is ready if only one voltage is present It generates the CPU Reset when the logic voltage reaches 4 75V It also generates the PREFAULT signal to handles the printer status in the NVM In the next two figures are shown the schematics and the typica...

Page 43: ...ker movement are obtained via a linear movement of the rotor of a 15 degrees bipolar step motor 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 ____________________________________________________________________________________...

Page 44: ...olar step motor This motors operate at maximum speed of 8 IPS For both the motors the driver device is a dual full bridge driver L298 with a current controller L6506 as indicated in the figure below 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 ...

Page 45: ...er the recycle diodes and the power drivers In the figure below is indicated the internal block diagram of this device Figure 3 9 Ribbon and AGA Motors Driving Cicruit ALTERNANCE MOTORS The alternance motor tractor friction switching is a DC motor 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 t...

Page 46: ...zed below The following two sensors enters directly in the port 1 of the microprocessor Home Position interrupting sensor Ribbon Fault interrupting sensor The following sensors enters in a analog MUX multiplexer with 8 input and 2 outputs and then in the A D section of the microprocessor The number on the diodes represents the pin number of the sensors cable connector see chapter 8 for major detai...

Page 47: ...to the core and the clapper is pulled to contact the core so that the needle is pushed against the media fig 3 13 b Figure 3 13 a Figure 3 13 b Print Head Behaviour The coil is energized through the TR1 transitor and then is disharged through the TR2 and D1 drived by the TR3 transistor These phases can be repeated more times in the chopper mode behaviour After that the phase of coil stored energy ...

Page 48: ...ergy can be selected via operator panel in order to obtain the best performance in term of printout noise when multiple forms paper is used The timing values µsec are programmed by the ASIC timer registers Low Normal T1 Timer 1 100 115 T2 Timer 2 typical 100 85 T3 Timer 3 37 5 37 5 T4 Negative duty cycle inside T3 12 5 12 5 T1 T2 discharge time 230 230 Energy mJ 4 5 Figure 3 15 Print Head Needle C...

Page 49: ...oltage 7 High precision zener diode regulator 8 Optical linear circuit for galvanic insulation 9 Pulse Width Modulator circuit 10 Energy recovery Circuit The low frequency section includes receptacle fuses switch EMI RFI filter rectifier bridge and smoothing capacitors The main converter section is forward type converter working at a frequency variable of 65 Khz The outputs of the transformer are ...

Page 50: ...____________________________________________________________________ 4 1 2 3 5 6 7 8 9 10 78 V 38 V 5 V Fig 3 16 Power Supply Major Block Diagram ____________________________________________________________________________________________ LA400 Multiprinter 3 19 ER LA400 SV ...

Page 51: ...he Platform layer the Application layer is significantly independent from the characteristics of the running H W The PLATFORM layer is structured into several module swhich are personalized on the H W characteristics CPU Host Interface Operator Panel H W Device etc The synchronisation of the Platform modules is performed by a Real Time Compuprint Operating System which offers a set of primitives t...

Page 52: ..._________________________________________________________________________________________ Figure 3 17 Software Architecture ____________________________________________________________________________________________ LA400 Multiprinter 3 21 ER LA400 SV ...

Page 53: ..._______________________________________________________________________________________ Chapter 4 Removal and Replacement ____________________________________________________________________________________________ LA400 Multiprinter 4 1 ER LA400 SV ...

Page 54: ...rmation A CAUTION provides information intended to prevent equipment damage A WARNING provides information intended to prevent personal injury You must observe anti static precautions when maintaining this printer Disassembly procedure must to be executed from the front side of the printer 4 2 Recommended Hand Tools and Equipment The following items should be available for the technicians performi...

Page 55: ... section 4 3 11 12 Carriage Motor and Fan 1 2 4 5 12 section 4 3 12 13 Bail Assy 13 section 4 3 13 14 Cut Sheet Assy 1 2 4 14 section 4 3 14 15 Upper Feeder Assy 1 2 4 5 15 section 4 3 15 16 Platen Assy 1 2 4 5 16 section 4 3 16 17 Lower Feeder Assy 1 2 4 5 17 section 4 3 17 18 Carriage Assy 1 2 4 5 18 section 4 3 18 19 Sensor Cable Assy 1 2 4 5 19 section 4 3 19 20 Mechanical Assy 1 2 4 5 20 sect...

Page 56: ... open by pulling it upward until it is fastened with the magnetic lock 3 Disengage the tractor group from the mechanical assy by acting on the two small levers 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 ___...

Page 57: ...chanical assy in new printers this action will be not necessary anymore 4 Unplug the operator panel connector from the operator panel board 5 Rotate the operator panel group of 90 and at the same time extract it from the front cover 6 Unscrew the six screws securing the operator panel boards to the cover and remove them 7 Remove the operator panel board from the LCD display board by acting on the ...

Page 58: ... cartridge and bail assy 3 Unscrew the screw securing the print head cable to the carriage assy 4 Unscrew the two screws securing the print head 5 Open the printhead cable zif connectors and unplug these connectors and the color motor connector if present by manually acting on their bends 6 Remove the printhead Replace the Print Head following the above instructions in reverse order NOTICE Before ...

Page 59: ...her two on the front side 4 Remove the main front cover by extracting it and at the same time rotating it towards its front side 5 Open the top cover and extract it from the main front cover by acting on its pins located on both sides 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 reve...

Page 60: ...3 Remove the main rear cover by extracting it from the rear side 4 Extract the rear tractor cover with the interlock board by simply extracting them from the main rear cover 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 ...

Page 61: ...l recommended anti static precautions 1 Remove the rear cover group refer chapter 4 3 5 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 Multipr...

Page 62: ...rear side one is located on the left side of the printer 4 Unplug all the connectors from the main board by acting on their bends Note Open the print head cable zif connector before extracting the cable Open the metal retaining clip with a screwdriver installed only on the flat cables 5 Unhook the upper part of the rear connector bracket from the base assy 6 Extract the main board from the printer...

Page 63: ...uring the ground cable on the metal shield 4 Unscrew the screws securing the power supply cover to the lower shield and remove it 5 Unscrew the six screws securing the power supply board to the base unit 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 attent...

Page 64: ...he mechanical assy 4 Extract the ribbon motor from the plastic support 5 Remove the plastic support and the pivot assy from the mechanical assy 6 Unplug the ribbon motor connector from the main board and extract the cable from its cable retainers located in the rear part of the mechanical assy 7 Remove the pivot assy Replace the ribbon motor assy and the left support parts following above instruct...

Page 65: ...om the main board and extract the cable from its cable retainers located on the rear part of the mechanical assy 4 Remove the AGA motor assy 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 ...

Page 66: ...om the platen axis 5 Remove the friction washer the open gear and the spring by simply extracting them from the platen axis 6 Remove the tractor friction lever by simply extracting upward from the left side of the mechanism 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...

Page 67: ...rom the main board and extract the cable from its cable retainers located in the rear part of the mechanical assy 7 Unscrew the four screws securing the front carriage motor bracket to the mechanism 8 Remove the front carriage motor bracket 9 Unscrew the two screws securing the carriage motor assy to the mechanism 10 Drive off the carriage belt from the carriage motor gear 11 Unscrews the three st...

Page 68: ...ion 3 Gently unhook the left and right bail springs from the hole on the mechanical side 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 ____________________________...

Page 69: ...5 2 Unscrew the screw securing the cut sheet assy on the right side of the mechanical 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...

Page 70: ...ng on the the feeder assy axis right 4 Remove the right bushing 5 Drive off the platen belt from the upper feeder assy gear 6 Put the rear tractor plastic slider push pull selector in its rear position 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 ...

Page 71: ...e bearing bracket to the left side of the mechanism and remove it 6 Remove the bearing and the special washer from the platen axis 7 Put the print head to its maximum distance from the platen assy 8 Gently shift the platen assy left from its position and then extract it from the left side of the mechanical assy Replace the platen assy following the above instructions in reverse order NOTICE the pl...

Page 72: ...ove the paper belt from the lower feeder assy gear and the gear from its axis 9 Remove the circlip retaining the lower feeder gear to the axis 10 Unscrew the four screws securing the cut sheet profile to the mechanical assy 11 Remove the cut sheet profile by simply extracting it from the front 12 Remove the circlip retaining the lower feeder axis on the right side of the mechanical assy and shift ...

Page 73: ..._________________________________________________________________________________________ Figure 4 17 Lower Feeder Assy ____________________________________________________________________________________________ LA400 Multiprinter 4 21 ER LA400 SV ...

Page 74: ...e carriage belt to the carriage assy 6 Unscrew the two screws securing the main shaft retainer to the left side of the mechanism 7 Unscrew the two screws securing the main shaft retainer to the right side of the mechanism 8 Gently rotate the carriage assy with the front bar upward and extract it from the rear bar Replace the carriage assy following the above instructions in reverse order NOTICE th...

Page 75: ...or support to the frame and remove it by simply extracting it from the left side 7 Unscrew the screw securing the front fanfold sensor to its support 8 Unscrew the screws securing the ribbon fault and home position sensors to the plastic support 9 Unscrew the single sheet sensor from its metal support and extract it from the left side of the mechanical assy 10 Unplug the connector from the main bo...

Page 76: ...nplug all the connector from the main board 4 Unscrew the two screws retaining the mechanical block to the base 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 ...

Page 77: ...ning lever screw and remove the paper belt from the paper motor gear 4 Unscrew the three screws securing the paper motor to the right side of the mechanical assy and remove it 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 ________________...

Page 78: ...friction supports by simply pulling them upward from their location 5 Remove the mechanical assy refer to chapter 4 3 20 6 Remove the circlip retaining the friction bar assy to the mechanism 7 Remove the friction bar assy by simply extracting it from the left side Replace the friction bar assy following the above instructions in reverse order NOTICE the friction bar assy must have a proper positio...

Page 79: ..._______________________________________________________________________________________ Chapter 5 Adjustments ____________________________________________________________________________________________ LA400 Multiprinter 5 1 ER LA400 SV ...

Page 80: ... 1 4 to 1 5 pounds Tools Push Force type Dynamometer 1 Put the carriage assy in the rightmost position on the printer 2 Unloose the nut securing the loose pivot to its support 3 Put the carriage belt under tension through a counter clockwise rotation of the screw located on the loose pivot 4 Apply the specified load in the middle of the carriage belt through a dynamometer with the indicated force ...

Page 81: ...6 pounds Tools Push Force type Dynamometer 1 Unscrew the two screws securing the adjustment lever to the right side of the mechanism 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 ________________________________________________________...

Page 82: ...Furthermore the platen ends must be aligned with the printhead needles by 0 08 mm Example platen A B C printhead needles Possible Values A B C 0 25 0 25 0 25 0 3 0 3 0 3 0 22 0 27 0 3 0 3 0 27 0 22 4 Mount the AGA marker by slightly tightening the rightside screw Set the thumbwheel on reference 1 Drop the AGA marker to its standard position and tighten both the screws Check for its rotation to ran...

Page 83: ...__________________________________________________________________________________ Figure 5 3 Print Head Adjustment ____________________________________________________________________________________________ LA400 Multiprinter 5 5 ER LA400 SV ...

Page 84: ..._______________________________________________________________________________________ Chapter 6 Service Maintenance ____________________________________________________________________________________________ LA400 Multiprinter 6 1 ER LA400 SV ...

Page 85: ... the service maintenance an initial inspection must be done In fact a problem in the printout is often due to a bad or wrong conditions of the printer itself The parameters that must be previous checked are set up cleaning paper specification After that if the problem remains a troubleshooting session can be activated 6 2 1 Set Up Check for the following items to make sure they are satisfied Is th...

Page 86: ...ecifications Also the paper is important to have high performances Check for the correct paper specifications 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 ...

Page 87: ...OSTRAP During this phase the Software of the printer initialized the hardware resources of the printer for the correct function The display will show Starting up and then The display will show Testing After a successfull initialization phase the printer enters in the normal operation phase moves the carriage assy on the left most position to check the home position sensor and goes in READY state I...

Page 88: ...eset the error condition The display shows a first message JAM ON PATH2 followed by CHECK PAPER Cause The tractor with paper jam sensor detected a paper jam in path 2 Action Check if the paper is correctly installed and remove it if is jammed Press PAUSE key to reset the error condition The display shows a first message JAM ON PATH3 followed by CHECK PAPER Cause The tractor with paper jam sensor d...

Page 89: ...tion The operation will be completed as soon as any button will be pressed The printer will be inizialized with the factory default values 6 3 2 3 Not Recoverable Errors When an error of this kind occurs the printer is halted and enters in error state All these errors cannot be resetted through specific actions and required the powering off of the printer Typically all these problems appears if an...

Page 90: ... above open driver line error SPV FLT 1 6 0 As above attach driver line error INT FLT 0 1 13 0 Interpreter errors P_M FLT 0 1 0 Print Manager Error command error P_M FLT 0 2 0 As above pending action P_M FLT 0 3 0 As above setup errror P_M FLT 0 4 0 As above unknown command code error P_M FLT 0 5 0 As above invalid command argument P_M FLT 0 6 0 As above unrecoverable run time error ENG FLT 2 3 40...

Page 91: ...t activated Check for the voltages on the power supply connector and on the board as indicated in the figure 6 1 All voltages are protected for short circuit 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 The AC printer fuse blown Cause An overcurrent on p...

Page 92: ...e the operator panel board or the operator panel cable or the main board TEST POINT OUTPUT VOLTAGES CONNECTOR PIN 1 5 V CONNECTOR PIN 2 5 V CONNECTOR PIN 3 GROUND CONNECTOR PIN 4 GROUND CONNECTOR PIN 5 GROUND CONNECTOR PIN 6 GROUND CONNECTOR PIN 7 GROUND CONNECTOR PIN 8 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 Sup...

Page 93: ... to start the test Exit key to stop it key If the fanfold paper is present in the path the test automatically starts otherwise a message to load paper is displayed Inspect the print sample for Equal density of the character Equal darkness Character sharpness No missing part of character Underline character and descenders No smudges or strikes Equal density of lines Compose character correctly form...

Page 94: ...eys are active To exit from Hex Dump mode Press the Exit key and the printer will return to the standard printing mode Example Text in normal mode ASCII ESC C H HEX 1B 43 48 BASIC CHR 27 CHR 67 CHR 72 The same text in hex dump mode 41 53 43 49 49 3A 20 45 53 43 20 43 20 48 0D 0A 48 45 58 20 20 3A 20 31 42 20 34 33 20 34 38 0D 0A 42 41 53 49 43 3A 20 43 48 52 24 28 32 37 29 3B 43 48 52 24 28 36 37 ...

Page 95: ...n may not be correctly mounted ACTION Re install the ribbon cartridge CAUSE The ribbon cartridge may be faulty ACTION Install a new one CAUSE The ribbon doesn t work correctly RIBBON BLOCKED message ACTION Check if the carriage unit movement allows a correct ribbon cartridge movement Replace the left support group pivot assy CAUSE The printhead cable may be incorrectly installed ACTION Check for t...

Page 96: ...hapter 8 Replace the color motor CAUSE The connection of the P H and main board is bad ACTION Verify the connection Replace P H cable CAUSE The main board may be faulty ACTION Install a new one SYMPTOM The character printing is in vertical disalignment CAUSE The printer may not be correctly adjusted ACTION Run Bidi alignment to check vertical adjustments CAUSE The carriage belt is not correctly ad...

Page 97: ...AUSE Paper is not correctly aligned on sprocket wheels ACTION Relaod paper ensuring that corresponding holes at each side of the paper are correctly aligned on tractor see tractor assy removal SYMPTOM The printer initialized but the display and Leds are off O P keys are available CAUSE The connection of the operator panel board and main board is bad ACTION Verify the connection Replace the cable o...

Page 98: ...e Replace the sensors cable group or the carriage motor assy SYMPTOM The printer does not initialize the buzzer sound continuously CAUSE The Controller eprom or the main board may be faulty ACTION Replace the controller eprom or the main board SYMPTOM The printer initializes but the paper is not loaded CAUSE The paper optical reflective sensors may be faulty ACTION Check if the sensor cable is cor...

Page 99: ...sting on the printer a proper loop back connector for each port is required Note It is possible to use the parallel Loop Back connector starting from the FW rel 2 0 Here below the loop back plugs layout SERIAL INTERFACE LOOP BACK DTR 1 6 DSR SD 2 5 RD SC 3 4 RC DEC P N 12 25083 01 Figure 6 4 Serial I F Loop Back Diagrams PARALLEL INTERFACE LOOP BACK STROBE 1 11 BUSY ACK 10 2 DATA 1 5 DATA 4 8 DATA...

Page 100: ...rrect proceed as follows Enter the FACTORY AUTO GAP adjustment by pressing the D key and a number from 8 to 8 will be displayed Press the Sel Save key and the display will show Load Manual Load a single 80gr m2 cut sheet form from the manual feeder Loading paper will be displayed during loading At this point select the value that sets the AGA marker in position 1 by acting through the R and L keys...

Page 101: ... impulse wave to increase its life The sensors are adjusted at maufacturing site with a proper tool which stores the output voltage level of the three sensors detected with NO PAPER installed This value is stored in the NVM If the adjustment is required proceed as follows With NO PAPER installed enter the Pap sensor tune adjustment by pressing the D key then press the Sel Save key to run the adjus...

Page 102: ...e frame Sel Save key starts the test During testing Testing carriage will be displayed If an error is detected the following will be displayed 1 Carriage error and 2 Check its moving Serial I F test This test checks by means of loop back plug closing for the correct operation of control status and data signals of the serial I F see loop back diagram at chapter 6 4 2 Sel Save key starts the test If...

Page 103: ... or a type RIBBON black or color type of tractor installed FRONT PUSH and REAR PUSH or PULL and ASF yes or no 3 Prints a complete pattern which exercises all the 24 needles of the printhead 4 A paper movement test is performed with forward and backward movements composed by a At first the printer prints the first and third chopped lines b After point 10 a backward paper movement is performed and a...

Page 104: ..._______________________________________________________________________________________ Chapter 7 Electromechanical Devices ____________________________________________________________________________________________ LA400 Multiprinter 7 1 ER LA400 SV ...

Page 105: ... 0 0087 and they are positioned in a diamond layout in which the odd pins 1 23 are positioned in the right row with the vertical pitch of each row of 0 282 mm 1 90 Needle 1 is the top most of right row needle 2 is the top most of the left row ELECTRICAL REQUIREMENTS Coil resistance 5 0 Ω 10 measured at 25 Thermal sensor 1000 Ω 6 measured at 25 see table below Temperature C Resistance Ω 10 887 20 9...

Page 106: ...dle N 8 Pin20 Needle N 24 Pin9 Thermal Sensor Pin21 Connector P3 Pin 2 Pin10 Needle N 10 Pin22 Connector P3 Pin 1 Pin11 38 Volt Pin23 Connector P3 Pin 4 Pin12 38 Volt Pin24 Connector P3 Pin 3 CONNECTOR P2 Pin1 38 Volt Pin12 Needle N 15 Pin2 Needle N 2 Pin13 38 Volt Pin3 38 Volt Pin14 Needle N 13 Pin4 Needle N 4 Pin15 38 Volt Pin5 Needle N 6 Pin16 Needle N 11 Pin6 Needle N 23 Pin17 Needle N 9 Pin7 ...

Page 107: ...Measured at 1 Khz 100 mV with energized coil Rated motor voltage 2 1 V With rated voltage applied to both phases parallel Rated phase current 2 5 A With rated current applied to both phases series Back electromotive force 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 ...

Page 108: ...0 Measured at 1 Khz 100 mV Rated motor voltage 4 4 V With rated voltage applied to both phases parallel Rated phase current 1 4 A With rated current applied to both phases series Back electromotive force 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 ...

Page 109: ... 20 Measured at 1 Khz 100 mV Rated motor voltage 7 7 V With rated voltage applied to both phases parallel Rated phase current 0 31 A With rated current applied to both phases series Back electromotive force 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 assignme...

Page 110: ...mH 20 Measured at 1 Khz 100 mV Rated motor voltage 7 3 V With rated voltage applied to both phases parallel Rated phase current 0 35 A With rated current applied to both phases series Back electromotive force 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 assig...

Page 111: ...rce is the voltage measured across the terminal carrying the motor shaft to a constant speed of 1000 rpm 7 1 2 6 ASF Motor The automatic sheet feeder motor is a direct current motor ELECTRICAL REQUIREMENTS Terminal resistance 37 56 Ω 10 The terminal resistance is calculated as the rated motor voltage divided by stall current Terminal inductance 20 mH 20 Measured at 1 Khz Rated motor voltage 24 V R...

Page 112: ...3 4 Phase inductance 106 mH 20 Measured at 1 Khz 100 mV Rated motor voltage 12 V With rated voltage applied to both phases parallel Rated phase current 0 07 A 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 _______________________________...

Page 113: ...mH 20 Measured at 1 Khz 100 mV Rated motor voltage 12 V With rated voltage applied to both phases parallel Rated phase current 0 06 A With rated current applied to both phases series Back electromotive force 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 assi...

Page 114: ... 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: ...rnance 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: ...___________________________________________ 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: ..._______________________________________________________________________________________ Chapter 8 Options ____________________________________________________________________________________________ LA400 Multiprinter 8 1 ER LA400 SV ...

Page 118: ...nit This option is USER installable and a MENU personalization is required In the figure 8 1 it is possible to see the various components of the 1st ASF which are 1 First Bin Feeder Assembly 2 Output Paper Stacker Assembly 3 Antinoise Cover 4 Paper Support for input paper 5 Paper Support for output paper 6 Metal hooks for ASF installation on basic mechanism 7 Electrical finger board for ASF electr...

Page 119: ...s the single sheet into the printer The first board is included in the STACKER assembly and connects through its finger type edge and the stacker cable the main board The second board is integrated in the ASF1 assembly and allows the connection of the DC motors As described in chapter 3 the ASIC integrated circuit drives the mechanical option connector lines via its internal serial synchronous int...

Page 120: ...6 of fig 8 1 OUTPUT STACKER INSTALLATION 5 Locate the connector which provides the connection of Output Stacker board with the Main Board through the Paper Stacker Cable on the right side of the top cover Install the output stacker inserting the grooves item 8 of fig 8 1 in the dedicated pins present on the basic mechanism Slowly insert the board edge item 7 of fig 8 1 in the connector until the s...

Page 121: ...t from the metal frame 5 Install the second BIN cable in the proper connector of the board shown inside the circle in the figure below Follow the same procedure for the installation of the third BIN on the second one To remove the BINs is necessary to start from the first one Remove the two plastic caps item 6 by simply extracting them from the first bin case Locate the hook lever and related pin ...

Page 122: ...it is free to up and down in its front part where the four color band inked ribbon is installed This option is USER installable and no MENU personalization is required COLOR MOTOR INSTALLATION Before proceeding to color motor installation remove if present the inked ribbon cartridge 1 Insert the color motor connector in the plug present on the left side of print head support 2 Insert the color mot...

Page 123: ...ribbon cartridge on its left and right supports 2 Insert the plastic bracket present on the color ribbon over the ribbon color plastic side 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 ___________...

Page 124: ..._______________________________________________________________________________________ Chapter 9 HW Setting FW Installation ____________________________________________________________________________________________ LA400 Multiprinter 9 1 ER LA400 SV ...

Page 125: ... KΩ to discharge any capacitance If a particolar connection requires these grounds being connected it is indispensable to remove this washer The pin 17 frame ground of the parallel interface is connected to the Frame Ground OPERATOR PANEL BOARD On this board a 2 pin connector without jumper default setting is present This connection is only for Manufacturing purpose only The jumper is shown in the...

Page 126: ...______________________________________________________________ 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: ..._______________________________________________________________ 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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