Summary of Contents for Digital Equipment DECwriter 110i
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DECwriter 110i Printer DECcolorwriter 120ic Printer Service Manual Order Number: EK-LJ12E-SV-001 COVERSV.PM5 11/7/94, 17:39...
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First Printing, October 1994 Digital Equipment Corporation makes no representations that the use of its products in the manner described in this publication will not infringe on existing or future patent rights, nor do the descriptions contained in this publication imply the granting of licenses to make, use, or sell equipment or software in accordance with the description.
Summary ....................vii Associated Documentation ..............viii Introduction ..................1-1 Technical Characteristics ..............1-2 Firmware and Character Generators ............ 1-5 Basic Emulation ...................... 1-5 Optional Emulations ....................1-5 Character Generator ....................1-5 Character Sets ......................1-6 Resident Fonts ......................1-7 List of Fonts for Portrait Page Formats ...............
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Printer Components and Internals ............2-2 Locating the Functional Components ..............2-3 General Block Diagram ................ 2-4 Monochrome Ink Jet Print Head Functioning ........2-5 Ink Jet Print Head Description ................2-5 Ink Jet Printing ......................2-7 Print Nozzles ......................2-9 Matrix components ....................
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General Rules ..................3-1 Line Voltage Supply ....................3-1 Locating the Printer ....................3-2 Environmental Conditions ..................3-2 Unpacking the Printer................3-3 Checking the Box Contents ..................3-3 Connecting the Printer to a Power Outlet ..........3-4 Installing the Print Head ............... 3-4 Inserting the Paper Input Tray .............
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Precautions ................... 4-1 Nozzle Cleaning and Priming ............... 4-2 Automatic Nozzle Cleaning ..................4-2 Cleaning and Servicing the Monochrome Print Head ..........4-2 Priming the Monochrome Print Head ..............4-3 Cleaning and Servicing the Color Print Head ............4-5 Power On Diagnostics ................5-1 Monochrome Print Test ................
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Major Components on the Main Board ..........7-2 Power Supply Circuit ................7-4 Connections between the Main Board and Drive Mechanisms .... 7-5 Connector Signals ................7-6 Premiliminary Warnings ..............8-1 Replacing the Monochrome Ink Cartridge ........... 8-2 Replacing the Print Head..............8-3 Removing / Remounting the Printer's Casing and Base .......
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User Guide that comes with this printer. This service manual is intended for the DECwriter 110i (LJ 110) monochrome printer and the DECcolorwriter 120ic (LJ 120) color printer. The only differ-...
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EK-LJ11*-UG DECwriter 110i Printer - User Guide EK-LJ11*-RF DECwriter 110i Printer - Setting Up Your Printer The DECcolorwriter 120ic Printer documentation set is only available in English. The * in the above order numbers corresponds to the language identifier for the appropriate language: A for American, E for English, F for French, G for German, I for Italian, S for Spanish.
This chapter introduces the features of the LJ 110/120 ink jet printer, its technical characteristics and details the firmware and the available character generators. The LJ 110/120 is an ink-jet printer that combine excellent quality printing with a fast writing speed, a low noise level and considerable versatility in the paper handling.
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The LJ 110/120 can be connected to a PC with standard parallel or optional serial interface. Compatible with MS-Windows and many other software applications, it can be used in most working environments. The resident firmware emulates the HP DeskJet 500C printer (PCL III +). Non-impact, bubble ink jet - With replaceable ink cartridge and water-resistant ink - Resolution: 300 x 300 dpi...
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- DOS and similar environments: 180 cps in Draft, 120 cps in - Windows and similar environments: - Draft : up to 3 pages per minute (ppm) - Letter Quality : up to 3 ppm NOTE: These values may vary depending on the software application and / or the type of computer used Not to exceed 1000 pages per month, average of 400 pages per month, including 160 color pages.
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ISO 7779 print test (ECMA 74 text) with 10 cpi pitch: 46 dBA Letter Quality print mode Front bystander position - Voltage: 115 V (+/- 10%) 220 / 230 V (+6% / -10%) 240 V (+ 6% / - 10%) - Frequency: 50 or 60 Hz - Power absorbed (operate): 25 W For power supply voltage 115 V (USA and Canada)
This printer's basic firmware is stored in a 4 MB EPROM mounted on the main board. It emulates both HP Deskjet 500 and HP Deskjet 500C printers, with all the relative character generators. The LJ 110/120 automatically selects between the two emulations depending on the type of print head installed (monochrome print head: HP Deskjet 500;...
CP 437 - International Danish OPE II Roman-8 Spain II PC 8 Denmark/Norway CP 863 - French Canadian CP 850 (Multilingual) PC-WIN - ANSI Windows 3.1 ECMA 94 Latin 1 CP 852 - Latin 2 ISO 4 - United Kingdom ISO 8859 / 2 - Latin 2 ISO 21 - Germany PC-WIN - Eastern Windows 3.1...
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The character fonts residing in the printer firmware are grouped according to the requested page format, being either portrait or landscape. Listed in the following tables are all the fonts available, along with their character heights and spacings. Courier 6 / 12 5 / 10 / 20 Courier italic 6 / 12...
Courier 6 / 12 / 24 10 / 20 Courier italic 6 / 12 / 24 10 / 20 Courier 6 / 12 / 24 16.67 / 33.34 Letter Gothic 6 / 12 / 24 12 / 24 Letter Gothic 4.75 / 9.5 / 19 16.67 / 33.34 Consist of a series of characters with the same ISO code as the basic character...
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Times Nordic Proportional Portrait Times Nordic Proportional Portrait Times Nordic italic Proportional Portrait Times Nordic Proportional Portrait Times Nordic italic Proportional Portrait Times Nordic Proportional Portrait Times Nordic italic Proportional Portrait Times Nordic Proportional Portrait Times Nordic italic Proportional Portrait Nordic Proportional Portrait Nordic...
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All the options can be installed directly by the user by following the instruc- tions provided in the single cartons. • Set of 1 color print head + 1 storage box + 2 Printer Drivers diskettes (including Digital DECcolorwriter 120ic Printer Driver) LJ11X-BK Each font card is supplied with a booklet which illustrates the font card...
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• User-installable kit for EIA RS 232C / V24 interface LJ50X-SI • 10 ft parallel shielded cable BC19M-10 • 6 ft parallel shielded cable BC19M-06 The monochrome print head, consisting of a printing unit and a replaceable ink cartridge, is available packaged as follows: •...
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This chapter describes the different functional and physical parts of the LJ 110/ 120 printer. It also explains how an ink jet print head functions. S-2.PM5 11/7/94, 13:39...
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The figure on the previous page show a front view of the components of the printer. The following parts are indicated: 1 Casing 2 Top cover 3 Paper output tray 4 Extendible support 5 Optional memory card 6 Memory card slot cover 7 Operator panel 8 Paper feed stepper motor 9 Selector switches...
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NOTE: The blocks with dashed lines are options. S-2.PM5 11/7/94, 13:39...
The monochrome ink jet print head is made up of an interchangeable resin shell containing 50 print nozzles and an electrical circuitry with 50 resistive heating elements (see figure 2-1a). The nozzles are assembled on a nickel and gold compound referred to as being electroformatted, and have a conical shape as shown in figure 2-1b.
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Fig. 2-1a: Ink jet print head and ink cartridge 50µ µ µ µ µ m Fig. 2-1b: Nozzle cross section µ µ µ µ µ Fig. 2-1c: Exploded view of the print head Fig. 2-1: Ink-jet print head S-2.PM5 11/7/94, 13:39...
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Each nozzle expels an ink bubble whenever an electrical signal is applied for a few microseconds to the corresponding resistive heating element. The small amount of ink that comes into contact with the resistive heating element the moment the electrical signal is applied boils and begins to vaporize thus creating an ink bubble.
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Fig. 2-2a Initial stage. Fig. 2-2b An electrical signal is applied to the heating element and an ink bubble is created. The ink exits the nozzle. Fig. 2-2c The ink bubble expands to its maximum size. Fig. 1-4d The ink bubble breaks and the ink is propelled onto the paper.
A total of 50 print nozzles are arranged on two rows of 25 nozzles each. In each row the nozzles are sequentially placed on each column as shown in figure 2-3. - Dampering/balancing nozzles A, C and B, D for the outermost 2-50 and 1- 49 nozzles.
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The resistive heat elements are divided into four groups. Two groups have 12 elements, the other two groups have 13. Only one element can be activated at each time in each group, and therefore no more than four elements can be activated simultaneously.
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The color ink-jet print head is made up of an interchangeable sealed shell containing 51 print nozzles, three liquid ink cartridges (one for each major color) and an electrical circuitry with 51 resistive heating elements (see figure 2-5a). The nozzles are divided among the three major colors as follows: - Yellow: 18 nozzles - Magenta: 17 nozzles - Light blue: 16 nozzles...
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Fig. 2-5a: Color ink jet print head 50µ µ µ µ µ m Fig. 2-5b: Nozzle cross section µ µ µ µ µ Fig. 2-4c: Exploded view of the print head Fig. 2-5: Ink-jet print head S-2.PM5 11/7/94, 13:40...
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Turn to section page 2-7 for a full explanation on ink-jet printing. A total of 51 print nozzles are arranged on two vertical rows of 25 and 26 nozzles and are divided horizontally in three groups, one for each color. Figure 2-6 shows how the nozzles are placed on each row.
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The resistive heat elements are divided into four groups. Two groups have 12 elements, the other two groups have 13. Only one element can be activated at each time in each group, and therefore no more than four elements can be activated simultaneously.
The operator panel on the LJ 110/120 has three buttons and two indicators. On-Line Install Cartridge Form Feed Fig. 2-8: Operator panel The operator panel buttons allow you to install the print head, expell the paper and switch the printer ON or OFF line. The indicators signal machine status, and out of paper or error conditions.
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The following table describes the functions of the keys in the different printer operating modes. Some functions are obtained by pressing one or more keys simultaneously. On-Line Toggles between ON LINE and OFF LINE while changing the indicator status. Moves the print head carriage to the print head Install Cartridge installation/replacement position.
The color selection lever is located on the right-hand side of the paper guide, just under the top cover. When installing a monochrome (black ink) print head, move this lever away from the printer (BLACK). When installing a color print head, move this lever towards the inside of the printer (COLOR).
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This chapter quicly describes the general installation rules, where to install the printer and how to prepare it for use (unpacking, connecting, loading the paper...). For details about the installation procedure, see the LJ 110/120 Printer User Guides. The following rules need to be followed to ensure optimum printer performance and to avoid making service calls for problems that do not directly involve the printer.
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For power supply voltage 115 V (USA and Canada) - Electromagnetic Compatibility: FCC Class B “Certified” - Safety Regulations: USA: UL 1950/478, Canada: CSA C22.2 For power supply voltage 220 - 240 V - Electromagnetic Compatibility: EN 55022 Class B, CEE 87/308, VDE 0871 level B (DBP Verf. 243/1991) - Safety Regulations: EN 60950 + Nordic Deviations, Germany: GS (EN 60950/9.88 e ZH/618) Never connect the printer to the same power outlet as industrial equipment...
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The printer is shipped in a single box containing the following components: 1. LJ 110/120 printer 2. Print head storage box (LJ 120 only or LJ 110 color kit) 3. Monochrome print head 4. Color print head (LJ 120 only or LJ 110 color kit) 5.
Firstly make sure that the voltage indicated on the printer's electrical data plate matches the actual line voltage rating, then plug the power cord into the wall outlet. Read section "General Rules" for information on optimum printer performance. The print head is equipped with an ink detection sensor that guarantees con- stant quality printing by indicating when the ink cartridge is nearly empty.
• Holding the print head by its outside shell, remove the protective tape from the nozzles in the direction of the arrow indicated below. Never touch the nozzles area, nor rest the print head on it. Fig. 3-3: Removing the protective tape •...
Paper is loaded into the printer from the paper input tray located underneath the printer. Before loading a pack of paper, however, install the outer part of this tray supplied with the printer. The paper input tray can hold up to 70 x 21 lb (80 g/m ), sheets of paper.
The paper is expelled from the rear of the printer into a paper output tray which is supplied with the printer. This tray is positioned on the top rear of the printer. Insert the tray's mounting studs into the respective slots on the top rear of the printer.
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Paper is loaded into the printer through the ASF tray that the printer is equipped with. This tray can hold up to 70 x 18 to 24 lb (70 to 90 g/m ) sheets of paper. The following table will aid you in determining the printable area for the two most common paper formats used, A4 and Letter/Legal.
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Fig. 3-7: Print area (1: Printer mechanical path) On the lower front of the printer there are two levers which control the centering and the securing of the paper in the paper tray. Fig. 3-8: : Paper securing lever - : Paper centering lever S-3.PM5 11/7/94, 17:15...
• Move the paper centering lever ( ) located on the front side of the printer towards the right. • Lower the paper securing lever ( ) and move towards the left. Fig. 3-9: Moving the levers to insert the paper •...
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• Close the central part of the tray against the paper. Fig. 3-11: Closing the paper tray • Once paper is loaded in the tray, move the lower level ( ) to the left in order to close the lateral guides and center the paper in the tray. •...
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You can manually load paper and envelopes one at a time through the slot on the front of the printer. The following table will aid you in determining the printable area for the most commonly used envelope sizes, C5, DL, COM-10 and C6. Fig.
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To manually load a sheet of paper into the printer: • Power on the printer. • Place a sheet of paper on the support and align the sheet against its left-hand side (envelopes should be aligned against the right-hand side of the support). •...
Memory cards can contain firmware emulations, an EPROM with a deter- mined group of character fonts, or additional memory (RAM or Flash EPROM). The memory card can be added to the printer at a later date. Information on the characteristics of the specific memory card and how to install it are provided in an appropriate document supplied with the card itself.
• Power the printer back on again. • Program the new Setup parameters if the memory card contains an emula- tion, or select the external font if the memory card contains an external font. The serial interface is a user-installable option. Installation instructions are provided with the interface itself.
To check whether the printer is installed correctly, simply run a print test. To run the print test: • Make sure there is paper in the input tray. • Power the printer off and then on again while pressing the Install Cartridge button.
The 36-pin connection cable is NOT supplied with the printer and must not be more than 2.5 meters long. Optional parallel interface cables are however available. The following figure gives the connector's pin-out. STROBE 01 19 GROUND DATA 0 02 20 GROUND DATA 1 03 21 GROUND...
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The Digital DECwriter 110i monochrome printer driver is provided with the LJ 110 and the LJ 120. The Digital DECcolorwriter 120ic color printer driver is provided with the LJ 120 and the LJ 110 color kit option.
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If the optional serial interface has been installed: Baud Rate 2400 Parity None Handshaking Hardware You can change the factory default settings using a total of seven selector groups. • Power off the printer. • Open the printer's top cover (1), then the selector switches cover (2). Fig.
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The six selectors in this group allow you to select the different fonts available. The eight selectors in this group allow you to define the print attributes and other features. The two selectors in this group are reserved. The three selectors in this group allow you to select the paper size. The six selectors in this group allow you to select the character set.
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SELECTOR SWITCHES SETTINGS PRINT ATTRIBUTES PAP. SIZE SERIAL INTERFACE ON POSITION OPTIONAL Baud 2400 9600 Letter 19200 38400 Legal Parity None Even Envelop. Handshake Other Hard Soft B C D E F G H 1 2 3 1 2 3 4 5 Fig.
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This chapter describes basic maintenance operations the user will be required to perform during the printer's working life. Preventive maintenance is not required, however during each service intervention it is suggested that you: − − − − − Make sure there is no trace of ink on the surface of the print head nozzles.
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The printer automatically cleans the external surface of the nozzles during paper movement. It is up to the user, however, to restore ink after one or more nozzles have been found to be clogged. The print test runs a gradual check on the nozzles. This test is particularly indicated for finding faulty nozzles.
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- After a print job, tightly seal the nozzle bay so the nozzles are protected against dust and to avoid the ink from drying-out when exposed for a certain period of time. Since on the LJ 110/120 this operation is carried out auto- matically after a few seconds of printer inactivity, wait a few seconds before powering off the machine after a print job.
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• Pressing down the ink slide (labeled <PUSH>) (1), move it slowly from right to left along the full length of its shaft (2). Release the slide and return it to the right edge (3). Fig. 4-1: Priming the print head •...
Also the color ink-jet print head demands special care as far as nozzle cleaning is concerned. Given their particular structure, dust or the drying-out of exposed ink can easily clog the nozzles. Listed below are some useful tips that will guarantee the optimum use of the print head.
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This chapter describes the several diagnostics and testing procedures available on the LJ 110/120 printer. These procedures are designed to help the user to check the machine correct functioning. The machine firmware has been designed so that a check is made on the printer's major function each time the printer is powered on.
The following information is provided: - The printer's selected emulation and firmware release. - The type of print head installed. - Whether the nozzles are operating correctly (Print Head Test). If the test finds that the ink droplet is not propelled from one or more nozzle but the Nozzle Test is successful, you may need to prime the print head (for monochrome print head only).
The color print test requires a single sheet of paper and is divided into three separate subtests, one for each color. With the color print test structured in this way you can check that each nozzle group works correctly. To make sure that the command codes sent from the system are received correctly, this feature prints the corresponding ASCII code (hexadecimal) of all the characters that are input into the printer.
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This section talks about some of the most significant faults that may be de- tected, along with their probable cause and corrective action. These faults have been grouped as follows: These faults concern the Vac/Vdc power and control circuits. - If the printer does not power on (the On indicator is off and there are no mechanical movements), make sure the line voltage is available.
- If the Nozzle Test shows that one or more nozzles are not receiving the electrical signal, remove the print head and clean the electric contacts on both the carriage and print head using a clean brush or a cloth dampened with an alcohol solution.
This chapter describes the several operting and functional states relative to the printer working. It also describes the indicators meanings, considering both normal and fault conditions. On-Line indicator lit - ON LINE The printer is ready to receive data. On-Line indicator off - OFF LINE State imposed by the operator, who has pressed the On-Line button.
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One of the following states will be present in the ON LINE or OFF LINE operating states. - FREE No data to be printed. - BUSY From the reception of data until the completion of its printing. - IDLE Data to be printed, but awaiting a Form Feed command (from console or line).
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On-Line and On indicators flashing alternately State caused by end of ink condition. Load a new print head, and then return the printer to the ON LINE operating state by pressing the Install Cartridge button. On-Line and On indicators flashing with the sequence On-Line twice followed by On once State caused by incompatibility between the type of print head inserted and the position of the print head selection lever.
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Electrical Interconnections Electrical Interconnections This chapter describes the electrical interconnectionns between the different functional elements of the printer. S-7.PM5 3/14/97, 3:38 PM...
Electrical Interconnections Major Components on the Main Board Paper feed motor Carriage motor Console Print head Print head Memory card Parallel interface 20 Volt regulator IC87R Paper feed motor driver Carriage motor driver TL074 LM 393 IC10 Print head driver IC11 Print head driver IC12...
Electrical Interconnections Connections between the Main Board and Drive Mechanisms Carriage Carriage Reaet and Motor Print Head Setup Photosensor Print Head Flat Cable Memory Paper Card Feed Motor Operator Panel Power Group Out of Paper MAIN BOARD Photo sensor Color Print Head Detection Photosensor Fig.
Electrical Interconnections MAIN BOARD /STRB1 19 GND CD 0 20 GND CD 1 21 GND CD 2 22 GND CD 3 23 GND CD 4 24 GND CD 5 25 GND CD 6 26 GND PARALLEL CD 7 27 GND INTERFACE /ACK 0 28 GND...
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This chapter explains the different disassembly/reassembly procedures. To ensure maximum safety, power off the printer and unplug it from the line voltage before beginning any operation. All operations must be carried out in a clean and lear area. Make sure the print head is in its parking position before powering off the printer.
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• Press Install Cartridge to move the print head carriage to the print head installation/replacement position. • Open the printer's top cover. • Do not remove the print head, but just the ink cartridge (2) by moving the plastic tab located on the print head (1). •...
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• Press Install Cartridge to move the print head cariage to the print head installation/replacement position. • Open the printer's top cover so as to access the print head. • Remove the print head by first pushing it towards the rear of the printer (1) and then lifting it out of its slot (2).
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• Disconnect the interface cable. • Remove the paper input and output trays. • Remove the memory card, if inserted. • Open the top cover and remove the paper insertion guide 1 by lifting it from the front and then turning it to free the studs from their respective slots. •...
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• Disassemble the base from the frame as explained in previous section. • Disconnect the print head's flat cables from connectors 1 and 2. • Press catch 3 to release the mechanical assembly from the electronic board and power supply support and remove connectors 4 and 5. Fig.
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• Remove the mechanical assembly as explained in previous section. • Remove connector 1. • Release board 2 from catches 3 and 4. NOTE: If the main board needs replacing, remember to remove the firmware and character generator EPROMs from the old board so they can be installed on the new one.
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• Remove the mechanical assembly as explained in the corresponding section. • Remove connector 1. • Press catch 2 and lift power group 3. Fig. 8-6: Removing the power group S-8BIS.PM5 11/7/94, 17:35...
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• Remove the printer casing as explained in the corresponding section but remove just the operator panel connector. • Press where indicated by the arrow and slide off operator panel 1. Fig. 8-7: Removing the operator panel S-8BIS.PM5 11/7/94, 17:35...
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• Remove the mechanical assembly as explained in the corresponding section. • Release the motor by turning it in the direction of the arrow. • Remove the motor after releasing the cable from the cable clips. Fig. 8-8: Removing the paper feeed motor S-8BIS.PM5 11/7/94, 17:35...
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• Remove the mechanical assembly as explained in the corresponding section. • Disconnect flat cables 1 and 2. • Disconnect the ink discharge tube 3. • Release the carriage motor cable from cable clip 4. • Press catch 5 and partly lift the front structure 6. •...
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• Remove the mechanical assembly as explained in the corresponding section. • Remove the front structure as explained in the corresponding section. • Disconnect belt 1. • Slide off shaft 2. • Release the motor by turning flange 3 in the direction of the arrow. •...
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• Remove the mechanical assembly as explained in the corresponding section. • Remove the front structure as explained in the corresponding section. • Disconnect belt 1. • Slide off shaft 2 in the direction of the arrow. • Remove carriage 3 after disconnecting its belt. NOTE: If the belt tightener comes away, mount it back on as shown in the highlight.
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