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Epson DLQ-3000 Service Manual

24-pin dot matrix printer
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EPSON
24-PIN DOT MATRIX PRINTER
EPSON DLQ-3000+

SERVICE MANUAL

SEIKO EPSON CORPORATION
4008259

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Summary of Contents for Epson DLQ-3000

  • Page 1: Service Manual

    EPSON 24-PIN DOT MATRIX PRINTER EPSON DLQ-3000+ SERVICE MANUAL SEIKO EPSON CORPORATION 4008259...
  • Page 2 However, should any errors be detected, SEIKO EPSON would greatly appreciate being informed of them. The above notwithstanding SEIKO EPSON can assume no responsibility for any errors in this manual or the consequences thereof. EPSON is a registered trademark of SEIKO EPSON CORPORATION.
  • Page 3 CERTIFIED REPAIR TECHNICIAN. 2. MAKE CERTAIN THAT THE SOURCE VOLTAGE IS THE SAME AS THE RATED VOLTAGE, LISTED ON THE SERIAL NUMBER/RATING PLATE. IF THE EPSON PRODUCT HAS A PRIMARY AC RATING DIFFERENT FROM AVAILABLE POWER SOURCE, DO NOT CONNECT IT TO THE POWER SOURCE.
  • Page 4 Includes a step-by-step guide for product disassembly and assembly. CHAPTER 4. ADJUSTMENT Includes a step-by-step guide for adjustment. CHAPTER 5. TROUBLESHOOTING Provides EPSON-approved techniques for troubleshooting. CHAPTER 6. MAINTENANCE Describes preventive maintenance techniques and lists lubricants and adhesives required to service the equipment.
  • Page 5 REVISION SHEET Revision Issued Data Contents Rev. A August 21 1997 First Release...

  • Page 6: Table Of Contents

    TABLE OF CONTENTS CHAPTER 1. GENERAL DESCRIPTION CHAPTER 2. OPERATING PRINCIPLES CHAPTER 3. DISASSEMBLY AND ASSEMBLY CHAPTER 4. ADJUSTMENT CHAPTER 5. TROUBLESHOOTING CHAPTER 6. MAINTENANCE APPENDIX...
  • Page 7 Chapter 1 Product Description 1.1 Features ....................1-1 1.2 Consumables and Options..............1-3 1.3 Hardware Specification................1-4 1.3.1 printing Specification..............1-4 1.3.2 Character Specifications and Control Codes ......1-7 1.3.2.1 Coded Character Sets ............1-7 1.3.2.2 Type Faces................1-7 1.3.2.3 Rendition ................1-7 1.3.2.4 Combination of character tables and typefaces ....
  • Page 8 1.4 Interfaces ....................1-28 1.4.1 Parallel Interface................1-28 1.4.2 Serial Interface................1-33 1.4.3 Optional Interface ................ 1-34 1.4.4 Printer language ................1-35 1.4.5 Prevention Hosts from Data Transfer Time-out ....... 1-36 1.4.6 Interface Selection ..............1-36 1.5 Operation ....................1-37 1.5.1 Control Panel ................

  • Page 9: Features

    The DLQ 3000 , equipped with a Bi-directional parallel interface, is the most advanced EPSON 24-pin impact-dot printer. It prints on continuous multi-part form as well as on single sheet, which makes the printer highly usable in office environment . The main features of...
  • Page 10 DLQ-3000+ Figure 1-1. Exterior View of DLQ 3000+ Rev. A...

  • Page 11: Consumables And Options

    Product Description 1.2 Consumables and Options Table 1-1. Accessories and Options Part Number Description Consumable Supplies S015066 Ribbon cartridge (Black) S015067 Ribbon cartridge (Color) Optional Equipment C806830 Cut sheet feeder 32KB intelligent serial I/F card C82307 / C82308 32KB intelligent parallel I/F card C82310 / C82311 Localtalk™...

  • Page 12: Hardware Specification

    DLQ-3000+ 1.3 Hardware Specification 1.3.1 printing Specification Print method Impact-dot matrix Print pin arrangement 24-pin rhombus (See Figure 1-2.) Figure 1-2. Pin Arrangement Printing direction Bi-directional printing with logic seeking Resolution See Table 1-2. Table 1-2 .Printing Resolution Printing Mode Horizontal Density Vertical Density Adjacent Dot Print...
  • Page 13 Product Description Printing speed See Table 1-3. Table 1-3. Printing Speed Printing Mode Character Size Maximum Printing Speed Mode 0 Mode 1 Mode 2 Mode 3 Mode 4 High speed draft 10 cpi 10 cpi Draft 12 cpi 15 cpi Craft condensed 17 cpi 20 cpi...
  • Page 14 DLQ-3000+ Figure 1-3. Printing Speed Selection Mode Rev. A...

  • Page 15: Character Specifications And Control Codes

    Product Description 1.3.2 Character Specifications and Control Codes 1.3.2.1 Coded Character Sets ASCII international and Legal international character sets * France Germany Denmark 1 Sweden Italy Spain 1 Japan Norway Denmark 2 Spain 2 Latin America Korea Legal Note: The codes for the international and legal characters are as follows: 23H, 24H, 40H, 5BH, 5CH, 5DH, 5EH, 60H, 7BH, 7CH, 7DH, 7EH Standard version (11 character tables) Italic table...

  • Page 16: Combination Of Character Tables And Typefaces

    EPSON Sans Serif PC 437 (US Standard Europe) version EPSON Sans Serif EPSON Roman T PC 850 (Multilingual) EPSON Courier EPSON Sans Serif H PC 860 (Portuguese)) EPSON Prestige PC 861 (Icelandic) EPSON Script PC 863 (Canadian-French) EPSON OCR-B PC 865 (Nordic)

  • Page 17: Memory Size

    Product Description 1.3.2.5 Memory Size Input buffer 128 K byte or 1k byte Download memory Approximately 10 K byte CG ROM NLSP Version: 8 M bit, Standard Version: 4 M bit 1.3.2.6 Character Size Character size Bit map font 10.5 point Scalable font 10.5 point Character matrixes...

  • Page 18: Paper Feed Specification

    DLQ-3000+ 1.3.3 Paper Feed Specification 1.3.3.1 Friction Feed (Cut sheet) Paper Path Single sheet, envelopes Front and rear insertion (Manual/CSF insertion) Multi-part form Rear entry (Manual/CSF insertion) Notes: 1. Set the release lever to “FRICTION”. 2. Do not load continuous paper (including folding paper). 3.

  • Page 19: Paper Specification

    Product Description 1.3.4 Paper Specification Cut sheet (Single sheet) Table 1-6. Cut sheet Specification : Single Sheet Minimum Maximum Width 3.6 inch 16.5 inch Manual insertion 92 mm 420 mm 3.9 inch 16.5 inch 100 mm 420 mm Length 3.5 inch 16.5 inch Manual insertion 92 mm...
  • Page 20 DLQ-3000+ Envelopes Table 1-8. Envelope Specification Minimum Maximum Envelopes (No.6) Width 6.5 inch/165 mm Length 3.6 inch/92 mm Envelopes (No.10) Width 9.5 inch/241 mm Length 4.1 inch/105 mm 0.0063 inch 0.021 inch Thickness 0.16 mm 0.52 mm 45 g/m² 91 g/m² Weight 12 lb.
  • Page 21 Product Description Continuous paper Table 1-9. Continuous Paper Specification : Single Paper/Multi-Part Form Minimum Maximum Width 4.0 inch 16 inch 101.6 mm 406.4 mm 4.0 inch 22.0 inch 101.6 mm 558.8 mm 3.5 inch 16.4 inch Length (1 page) 92 mm 420 mm * Copies 1 original and 6 copies...
  • Page 22 DLQ-3000+ Labels Table 1-10. Label Specification Minimum Maximum Label size See Figure 1-4. Base sheet width 4.0 inch 16.0 inch 101.6 mm 406.4 mm Base sheet length 4.0 inch 22.0 inch (1 page) 101.6 mm 559 mm 0.0028 inch 0.0035 inch Base sheet thickness 0.07 mm 0.09 mm...
  • Page 23 Product Description Pre-print paper Table 1-11. Pre-Print Paper Specification Minimum Maximum Width 4.0 inch 16.0 inch 101.6 mm 406.4 mm Length 4.0 inch 22.0 inch (1 page) 101.6 mm 559 mm 0.0025 inch 0.047 inch Total thickness 0.065 mm 0.12 mm The paper printed with the color which has Quality the reflective rate of less than 60 %, such as...
  • Page 24 DLQ-3000+ Overlapping multi-part forms Table 1-13. Overlapping Multi-Part Form Specification Minimum Maximum Base sheet width 4.0 inch 16.0 inch 101.6 mm 406.4 mm Base sheet length 4.0 inch 22.0 inch (1 page) 101.6 mm 559 mm – 0.026 inch Total thickness –...

  • Page 25: Printable Area

    Product Description 1.3.5 Printable Area This section describes printable area for various types of paper. Cut sheet Figure 1-7. Printable Area for Cut Sheet Table 1-15. Printing Area for Cut sheet Single cut sheet Multi-part cut sheet Paper width (PW) Refer to Section 1.3.4.
  • Page 26 DLQ-3000+ Continuous paper Figure 1-8. Printable Area for Continuous Paper Continuous paper Paper width (PW) Refer to Section 1.3.4. Paper length (PL) Refer to Section 1.3.4. Left margin (PM) 9 mm (0.354”) or more Right margin (LM) 9 mm (0.354”) or more Top margin (TM) 4.2 mm (0.165”) or more...
  • Page 27 Product Description Labels Figure 1-9. Printable Area for Labels Table 1-16. Printable Area for Labels Continuous paper Paper width (PW) Refer to Section 1.3.4. Paper length (PL) Refer to Section 1.3.4. Left margin (LM) 12 mm (0.472”) or more Top margin (TM) 1.2 mm (0.0472) or more Left margin on label...
  • Page 28 DLQ-3000+ Envelops Figure 1-10. Printable Area for Envelopes Table 1-17. Printable Area for Envelops Continuous paper Paper width (PW) Refer to Section 1.3.4. Paper length (PL) Refer to Section 1.3.4. Left margin (LM) 3 mm(0.118”) or more Right margin (RM) 3 mm(0.118”) or more 0 mm (0”) or more * Top margin...
  • Page 29 Product Description Overlapping multi-part forms Figure 1-11. Printing Area for Overlapping Multi-part Forms Table 1-18. Printing Area for Overlapping Multi-part Forms Continuous paper Paper width (PW) Refer to Section 1.3.4. Paper length (PL) Refer to Section 1.3.4. Left margin (LM) 19 mm (0.748”) or more Right margin (RM)
  • Page 30 DLQ-3000+ Continuous forms with labels Figure 1-12. Printable Area for Continuous Forms with Labels Table 1-19. Printable Area for Continuous Forms with Labels Continuous paper Paper width (PW) Refer to Section 1.3.4. Paper length (PL) Refer to Section 1.3.4. Left margin (LM) 9 mm (0.354”) or more Right margin...
  • Page 31 Product Description Overlapping multi-part forms with labels Figure 1-13. Printable Area for Overlapping Multi-Part Forms with Labels Table 1-20. Printable Area for Overlapping Multi-Part Forms Continuous paper Paper width (PW) Refer to Section 1.3.4. Paper length (PL) Refer to Section 1.3.4. Left margin (LM) 19 mm (0.748”) or more...

  • Page 32: Paper Thickness Detection

    DLQ-3000+ 3. Forms-override printing is available for 20 lines after the paper end is detected. (Paper feeding pitch is not guaranteed.) The end of the printable are is 4.2 mm or more apart from the bottom edge of the paper 1.3.6 Paper Thickness Detection This printer is equipped with the automatic paper thickness adjust function.

  • Page 33: Ribbon Cartridge

    Product Description 1.3.7 Ribbon Cartridge 1.3.7.1 Monochrome ribbon cartridge Color Black Ribbon fabric Nylon 66 Ribbon dimension 25.5 mm (W) X 17 mm (L) X 1.5 mm (D) ribbon thickness 0.128 mm ± 0.007 mm Cartridge dimension 153 mm/6.0” (W) X 33 mm/1.3” (H) X 105 mm/4.1” (D) Ribbon life * 6 million characters Ribbon replacement...

  • Page 34: Input Data Buffer

    DLQ-3000+ 1.3.8 Input Data Buffer Approximately 128 K byte/1K byte 1.3.9 Electric Specifications 120 V version Rated voltage AC 120 V Input voltage range AC 103.5 to 132 V Rated frequency renege 50 to 60 Hz Input frequency range 49.5 to 60.5 Hz Rated current 7 A (maximum) Power consumption...

  • Page 35: Acoustic Noise

    Product Description 1.3.12 Acoustic Noise Noise level Approximately 55 dB (A) (According to ISO 7779) 1.3.13 Reliability Total print volume 9 million lines (excluding printhead) Printhead life 200 million strokes/pin (Monochrome ribbon) 100 million strokes/pin (Color ribbon) Ribbon life Fabric black ribbon life 6 million characters* Fabric color ribbon Black :...

  • Page 36: Interfaces

    DLQ-3000+ 1.4 Interfaces The EPSON DLQ-3000+ is equipped with the parallel and Mac serial interfaces and a card slot for an optional Type-B interface. This section provides information on each interface. 1.4.1 Parallel Interface Forward Channel Transmission mode 8 bit parallel, IEEE-1284 compatibility mode...
  • Page 37 Product Description Table 1-24. Data Transmission Timing Parameter Minimum Maximum tsetup 500 ns thold 500 ns tstb 500 ns tready tbusy 500 ns treply tack 500 ns 10 s tnbusy tnext tt-out * 120 ns tt-in * 200 ns Note: 1.
  • Page 38 DLQ-3000+ Table 1-25 shows the connector pin assignment and signals for forward channel of the parallel interface. Table 1-25. Connector Pin Assignments and Signals (Forward Channel) Return Pin No. Signal Name Description GND Pin The strobe pulse. Read-in of data is /STROBE performed at the falling edge of this pulse.
  • Page 39 Product Description Reverse Channel Transmission mode IEEE-1284 nibble mode Adaptable connector Same as for the forward channel Synchronization Refer to the IEEE-1284 specification Handshaking Refer to the IEEE-1284 specification Data transmission timing Refer to the IEEE-1284 specification Signal level IEEE-1284 level 1 device See the forward channel.
  • Page 40 Request nibble mode reverse channel transfer. Request device ID using nibble mode rev channel transfer Device ID The printer sends following device ID string upon request: [00H] [3DH] MFG EPSON; CMD ESCPL2, PRPXL24, BDC; MDL DLQ-3000+; CLS PRINTER; 1-32 Rev. A...

  • Page 41: Serial Interface

    Product Description 1.4.2 Serial Interface Synchronization Asynchronous Signal level EIA-232D MARK (logical 1): -3 V to -25 V SPACE (logical): +3 V to +25 V Word format Start bit: 1 bit Data bit: 8 bit Parity bit: Odd, Even or Non Stop bit: 1 bit Baud rate...

  • Page 42: Optional Interface

    DLQ-3000+ 1.4.3 Optional Interface The EPSON DLQ-3000+ supports an optional Type-B interface (Level 2) with the following characteristics. Reply message Table 1-28. Reply Message Reply message ESC/P2 IBM 2391 Plus Main-type MT24p, PW136cl10cpi, PRG(W0xxxx)rev Product name DLQ-3000+ Emulation type ESCPL2, PRPXL24, BDC...

  • Page 43: Printer Language

    Reply for Emergency command Send Emergency Message Receive Emergency Command Emergency Command Table 1-31. Emergency Command Command No. Command name 0x00 Get device IC 0x01 Get all status 1.4.4 Printer language ESC/P2 IBM 2391 Plus emulation EPSON Remote 1-35 Rev. A...

  • Page 44: Prevention Hosts From Data Transfer Time-Out

    Finally, the printer is BUSY continuously when the input buffer is full. 1.4.6 Interface Selection The EPSON DLQ-3000+ has three types of interfaces: Parallel, Serial, and optional Type-B. Each interface can be selected manually by SelecType or automatically. Both modes are selected thorough the default setting mode.

  • Page 45: Operation

    Product Description 1.5 Operation This section describes the function of each button on the control panel and LED printer status indicators. 1.5.1 Control Panel The control panel for this printer consists of 10 non-lock type push buttons, 4 LED indicators and 1 LCD.
  • Page 46 The printer has 2 types of tear-off functions; manual tear-off and auto tear-off. The manual tea-off is performed by pressing the Tear Off button . The auto tear-off is enabled by SelecType. These functions are same as for the conventional EPSON printers.

  • Page 47: Printer Status And Lcd/Led Indicator Conditions

    Product Description 1.5.1.2 Printer Status and LCD/LED Indicator Conditions Table 1-33 shows the printer status and When the printer is in more than one status, the printer indicates the prime status. If they have the same priority, the status occurs first is indicated.

  • Page 48: Printer Status And Buzzer

    DLQ-3000+ 3. Paper-out error occurs when the printer is under any of the following conditions: The printer does not load paper in spite of the attempt to load it. The printer finishes printing 1-page data on a sheet manually inserted. The end of the continuous paper has reached.

  • Page 49: Selectype

    Product Description 1.5.2 SelecType This printer provides SelecType function to change default settings. 1.5.2.1 SelecType Phase See Figure 1-17 which shows the SelecType phase transitions. Boxes show printer states or SelecType phases. The boxes with shadow involves button operations. Figure 1-17. SelecType Phase Transitions 1-41 Rev.

  • Page 50: Selectype Operation

    DLQ-3000+ 1.5.2.2 SelecType Operation SelecType 1 and 2 operations Step 1. Selecting the feature When the SelecType 1 or 2 starts, the first feature appears on the LCD. Scroll the features by pressing the “ ” (next) or “ ” (previous) button until the desired feature appears.

  • Page 51: Selectype Option

    Product Description 1.5.2.3 SelecType Option Table 1-35 and Table 1-36 show the options available for the SelecType 1 and SelecType 2, Font and Pitch, respectively. Table 1-35. SelecType 1 Option Menu Option Note *8.5 mm T-margin Tractor Increment : 0.14 mm (1/180”) from 4.2 mm to 8.5 mm + 25.4 mm *8.5 mm T-Margin Manual R...
  • Page 52 DLQ-3000+ Table 1-36. Options for SelecType 2, Font and Pitch Menu Option Notes SelecType 2 Language *English French German Italian Spanish Portuguese *Normal Cards Paper Type For cut sheet only Envelopes Overlapping Form *Off For continuous paper only Intensity Mode *Normal Dark Use the copy mode only...

  • Page 53: Functions At Power On

    Product Description 1.5.3 Functions at Power On This printer has the following 7 service modes. To enter each mode, press specified button (buttons) while holding down the Power switch. Test Printing LF/FF button with the power switch On. Button LQ mode: Draft mode: Load/Eject button with the power switch On.

  • Page 54: Bi-D Adjustment Mode

    DLQ-3000+ 1.5.4 Bi-D Adjustment Mode This printer has the Bi-D adjustment mode which enables users to align vertical lines. Refer to Table 1-37 and Figure 1-18. Table 1-37. Bi-D Adjustment Item Items Order Draft mode Bit Image (ESC 26H) mode LQ mode Figure 1-18.

  • Page 55: Initialization

    Product Description 1.5.6 Initialization 1.5.6.1 Printer Initialization This printer has 5 initialization types: Power-on initialization, Operator initialization, Initialization by the control panel operation, Software initialization and SelecType initialization. Power-on Initialization Triggers Turning on the printer Cold reset command (Remote RS command) Actions performed Initializes the printer mechanism.

  • Page 56: Initialize Defaults To The Standard

    DLQ-3000+ 1.5.6.2 Initialize Defaults to the Standard The use changeable defaults can be initialized to the standard settings by SelecType. The standard settings are shown in Table 1-38. Table 1-38. Standard Settings Items Standard settings Font Roman Pitch 10 cpi Character Table PC437 Page Length...

  • Page 57: Main Components

    Product Description 1.6 Main Components This printer is composed of the following components: Printer mechanism Main control board C210MAIN PSB/PSE board C124 PSB/PSE Control panel Housings 1.6.1 C210MAIN Board The C210MAIN consists of the followings: CPU (H8/3033 Gate array (E05B46) CG-ROM DRAM EEPROM...

  • Page 58: C124Psb/Pse Board

    DLQ-3000+ 1.6.2 C124PSB/PSE Board The electoral circuit board of this printer consists of 2 switching regulator circuits. Figure 1-20. C124PSB/PSE Board Component Layout 1.6.3 Printer Mechanism The printer mechanism of this printer is composed of the followings: CR motor PF motor Ribbon motor PG motor 2 cooling fans...

  • Page 59: Housing

    Product Description 1.6.4 Housing This printer is composed of the following housings: Bottom frame assembly Lower housing assembly Upper housing assembly Rear shield cover Printer cover assembly Rear cover Upper connector cover Figure 1-22. Printer Housings 1-51 Rev. A...
  • Page 60 Chapter 2 Operating Principle 2.1 Printer Mechanism Operating Principles..........2-1 2.1.1 Printing Mechanism ..............2-1 2.1.2 CR (Carriage) Mechanism ............2-3 2.1.3 PG (Platen Gap) Adjustment Mechanism........2-4 2.1.4 Ribbon Feed/Ribbon Shift Mechanism........2-6 2.1.4.1 Ribbon Feed Mechanism............. 2-7 2.1.4.2 Ribbon Shift Mechanism............2-7 2.1.5 Paper Feed Mechanism ..............
  • Page 61 2.3.12 Other Sensor Circuits ............... 2-31...

  • Page 62: Operating Principles

    Operating Principles 2.1 Printer Mechanism Operating Principles This chapter describes the operating principles of the printer mechanism (M-5P60). 2.1.1 Printing Mechanism ‰ Printhead The printing mechanism of this printer is composed of the 24-pin impact dot printhead and a ribbon mask. The printhead has 12 pin wires in each of 2 rows, which are aligned in an rhombic layout.
  • Page 63 DLQ-3000+ Table 2-1. Printhead Specification Item Description Printing method Impact dot printing Number of wires 24 wires (14 wires on each of 2 rows in an rhombic layout) Wire diameter 0.20 mm Head life Monochrome fabric ribbon: 200 million strokes / wire Color ribbon: 100 million strokes / wire Weight...

  • Page 64: Cr (Carriage) Mechanism

    Operating Principles 2.1.2 CR (Carriage) Mechanism The CR mechanism consists of the CR movement mechanism, external cooling fan, and platen gap adjustment mechanism. ‰ CR movement mechanism The CR is supported by 2 CR guide shafts by its high and low ends. The stepping motor used for the CR motor enables the CR to move to any positions.

  • Page 65: Pg (Platen Gap) Adjustment Mechanism

    DLQ-3000+ 2.1.3 PG (Platen Gap) Adjustment Mechanism PG adjustment is made manually and automatically. In the manual PG adjustment mode, the proper PG is originally set for the paper to be loaded by manually operating the PG adjust lever located at the left front of the printer. On the other hand, the automatic PG adjustment function lets the printer automatically measure the paper thickness and set the proper PG for the thickness.
  • Page 66 Operating Principles ‰ Manual PG adjustment function This function allows the user to set the proper PG manually by setting the PG adjust lever to one of the steps from -1 to 9. The selected step is converted into 4-bit data using adjustment switches and the data is transferred to the controller circuit, where the PG is determined based on the information.

  • Page 67: Ribbon Feed/Ribbon Shift Mechanism

    DLQ-3000+ 2.1.4 Ribbon Feed/Ribbon Shift Mechanism Ribbon feed/ribbon shift mechanism, located at the upper part of the CR, is composed of the ribbon motor, ribbon wind-up mechanism inside the ribbon cartridge, ribbon shift mechanism, and color ribbon cartridge sensor. The torque from the ribbon motor, the only motor which drives these mechanisms, is transmitted to each mechanism by changing the direction for rotating the motor, as described below: ƒ...

  • Page 68: Ribbon Feed Mechanism

    Operating Principles 2.1.4.1 Ribbon Feed Mechanism The ribbon feed mechanism is composed of the ribbon feed mechanism in the carriage, ribbon motor and ribbon cartridge. When the ribbon motor rotates counterclockwise, the ribbon drive pulley is driven to feed the ribbon. See Table 2-5 which shows how the torque is differently transmitted via the gear train.
  • Page 69 DLQ-3000+ Half-toning colors are created by printing a color on top of another, as shown in Table 2-6. The printer prints the brighter color first to prevent the ribbon from being stained . Table 2-6. Coloring Sequence Print color Print ribbon First print Second print Black...

  • Page 70: Paper Feed Mechanism

    Operating Principles 2.1.5 Paper Feed Mechanism The paper feed mechanism consists of the platen roller, PF roller (Paper Feed roller), paper eject roller, PF motor (Paper Feed motor), tractor unit, PEW sensor (Paper Width sensor), front/rear paper sensor, release sensor, paper jam sensor, and paper shift mechanism. 2.1.5.1 Core of the Paper Feed Mechanism This printer feeds paper by sliding it horizontally.

  • Page 71: Paper Feed Sensor Mechanism

    DLQ-3000+ 2.1.5.2 Paper Feed Sensor Mechanism The paper feed sensor mechanism is composed of the right/left PEW (Paper Width) sensors, front/rear paper sensors and paper jam sensor. These sensors detect conditions such as top and rear paper edge positions, paper width and paper jam. The paper feed sensor mechanism monitors detected conditions and feeds back the information to the CPU, which controls paper feeding.
  • Page 72 Operating Principles Table 2-7. Functions of the Paper Feed Sensor Sensor Detection Function Paper width measurement Selects the left and right margins. (detects the left and right paper edges) Right/left PEW sensors Paper bottom detection Depending on o the CR position, (detects the rear edge.) one of the sensors is used.

  • Page 73: Release Mechanism

    DLQ-3000+ 2.1.5.3 Release Mechanism The release mechanism consists of the release lever, sub release lever, release lever link and release sensor. It switches the paper path between cut sheet mode (including CSF mode ), continuous paper mode and paper jam removal mode in accordance with the release lever setting.

  • Page 74: Circuit Operating Principles

    Operating Principles 2.2 Circuit Operating Principles The power source of this printer is composed of the power switch, AC cable and C124 PSB/PSE board. It supplies DC voltage used to control the printer operation. 2.2.1 Power Supply Voltage The electrical circuit of this printer uses an RCC (ringing choke converter) type switching regulator, which outputs DC voltage required to operate the printer.

  • Page 75: Power Supply Circuit Operation

    DLQ-3000+ 2.2.2 Power Supply Circuit Operation The AC power source is supplied to the PSB/PSE board via the AC cable, power switch and fuse. The AC voltage is full-wave rectified using the diode bridge (DB1) and smoothed by the condenser. The surge cut circuit by SCR reduces the rush current at power-on. Over current protection circuit on the primary side IC101 and IC201 detect the input voltage of the primary side.

  • Page 76: Controller Circuit

    Operating Principles 2.3 Controller Circuit This section describes the controller circuit of this printer. This printer uses a 112-pin/QFP- type/16-bit microprocessor H8/3003 (IC16) for the CPU and drives it with the clock frequency of 14.7 MHz. The control program is stored in the 1-Mbit Flash-ROM (IC15) or PROM (IC18).The CPU receives the external reset signal and control the printer based on the control program.
  • Page 77 DLQ-3000+ Table 2-10. Main ICs and their Functions Location Function CPU (H8/3003 equivalent) IC16 The main CPU of the controller circuit Gate Array (E05B46) IC25 Controls systems and peripheral devices. Gate Array (E05A89) (built Functions as the I/F between the control panel in the panel circuit board.) and controller circuit.
  • Page 78 Operating Principles Figure 2-11. Controller Circuit Block Diagram 2-17 Rev. A...

  • Page 79: Interface Circuit

    DLQ-3000+ 2.3.1 Interface Circuit This section gives information on the parallel/serial interfaces of the DLQ-3000+. ‰ Bi-directional parallel interface The gate array E05B46 manages the IEEE-1284 nibble mode function using the internal IFU (Interface Unit). It latches data from the host computer by the /STB signal and automatically sends the BUSY signal.

  • Page 80: Reset Circuit

    Operating Principles 2.3.2 Reset Circuit The hardware reset circuit for this printer has 2 reset ICs: RST592D (IC22) and RST594E (IC20). When the +5 v for logic line is unstable dew to power-on, it outputs the reset signal until the +5 VDC line is stabilized to avoid abnormal operation of the printer. RST592D monitors the Flash-ROM with the threshold voltage set at approximately 4.2 VDC.

  • Page 81: Memory Back-Up Circuit

    DLQ-3000+ 2.3.3 Memory Back-up Circuit When the printer power is turned off, mainly the following data is backed up in the EEPROM AT93C66 (IC23). ‰ Paper length, TOF, TEAR OFF, left and right margins, line spacing, pitch selection, character code, character fonts, high speed print, print direction, customer code ‰...

  • Page 82: Ribbon Motor Controller/Driver Circuit

    Operating Principles 2.3.4 Ribbon Motor Controller/Driver Circuit A PM-type stepping motor is used for the ribbon motor of this printer. It is driven by 1-1 phase or 2-2 phase excitation mode, based on the selected rotational speed. This motor rotates in the both forward and backward directions and can stop at any position. Signal PFA, /PFA, PFB and /PFB are output to drive each phase from the gate array (E05B46) via the transistor array MP5302.

  • Page 83: Pf (Paper Feed) Motor Controller/Driver Circuit

    DLQ-3000+ 2.3.5 PF (Paper Feed) Motor Controller/Driver Circuit Since this printer uses a hybrid-type stepping motor for the PF motor, it allows the paper to move to and stop at any position, regardless of the direction for feeding paper. The motor is driven by 1-2 phase with the open-loop system.

  • Page 84: Cr (Carriage) Motor Controller/Driver Circuit

    Operating Principles 2.3.6 CR (Carriage) Motor Controller/Driver Circuit The CR motor for this printer is a hybrid-type stepping motor, which enables the CR to move to and stop at any position exactly, using both forward and backward rotation. It is controlled by the open-loop system and driven by 1-2 phase, 2-2 phase or W1-2 phase (for micro step), depending on the CR speed.
  • Page 85 DLQ-3000+ Table 2-14. 2-2 Phase Drive Step No. Phase A Phase /A Phase B Phase /B – – – – – – – – Note) : Applicable when the CR moves from 1st to 136th column direction. Table 2-15. 1-2 Phase Drive Step No.

  • Page 86: Bi-D Adjustment Function

    Operating Principles 2.3.6.1 Bi-D Adjustment Function Bi-D adjustment is performed to align dots vertically for the Bi-directional printing. This is accomplished by delaying the print timing pulse on which the carriage moves from the 136th column to the 1st, using the print timing pulse when the carriage moves from the 1st to 136th column as reference.

  • Page 87: Printhead Controller/Driver Circuit

    DLQ-3000+ 2.3.7 Printhead Controller/Driver Circuit The printhead of this printer has 24 head coils (12X2 lines) driven by the constant current coil driver circuit which consists of 2 transistors (PNP and NPN) and MOSFET. The printhead is driven by the flat wheel system. The transistors turn on and off the head coil voltages (VPA, VPB) according to the printing pulse A.

  • Page 88: Control Panel Circuit

    Operating Principles 2.3.8 Control Panel Circuit E05A89, the gate array for the control panel I/F, has the LCD driver, LED driver and panel switch input circuit built in. The serial I/F is used for signal transmission between the control panel and the main control board. The cover open sensor signal on the logic line is directly sent to the main control board via the control panel board.

  • Page 89: Pg (Platen Gap) Motor Driver Circuit

    DLQ-3000+ 2.3.9 PG (Platen Gap) Motor Driver Circuit Since a PM-type stepping motor is used for the PG motor, the motor can rotate in the both forward and backward direction and stop anywhere. The torque from the PG motor moves the CR guide shaft to obtain the proper PG. (Refer to Section 2.1.3.) The motor is driven by 2-2 phase.

  • Page 90: Paper Thickness Detecting Circuit

    Operating Principles 2.3.10 Paper Thickness Detecting Circuit PG is detected by the paper thickness sensor which consists of the slit disc and the photo- electric transfer element. See Table 2-19 and Figure 2-22 for the paper thickness sensor specification and paper thickness sensor circuit block diagram, respectively. Table 2-19.

  • Page 91: Paper Jam Sensor

    DLQ-3000+ 2.3.11 Paper Jam Sensor This printer is equipped with the paper jam sensor mechanism which consists of the magnetized roller attached to the same shaft for the sub loading roller assembly and the sensor (hall element) located beside the rear paper sensor. Having no contact with the loading drive roller assembly, the magnetized roller rotates independently along paper.
  • Page 92 Operating Principles 2.3.12 Other Sensor Circuits This printer is equipped with other sensors to monitor printer condition in detailed. ‰ Head thermistor The head thermistor detects temperatures around the head and sends the information with the analog signal to the CPU A/C converter using the internal resistance (16.5K This information prevents worn-out and shorter life of the drive coils due to over duty printing, and protects printhead during operation at low temperatures.
  • Page 93 DLQ-3000+ ‰ Front paper sensor Front paper sensor detects TOF position as well as paper presence condition. It uses a photo interrupter system. However, one end of the detecting lever is mechanically used to detect the leading edge of the paper, and the other end is to cut in between the photo interrupter sensor to detect paper.
  • Page 94 Operating Principles ‰ CSF sensor CSF sensor uses terminals for the CSF paper quantity sensor. The output signal for this sensor is pulled up to 10K , then input to the CPU via the filter circuit which consists of the resistor and the condenser. Table 2-28.
  • Page 95 Chapter 3 Disassembly and Assembly 3.1 Overview ....................3-1 3.1.1 Tools....................3-1 3.1.2 Checks after Repair............... 3-2 3.2 Disassembly and Assembly ..............3-3 3.2.1 Printhead Replacement ..............3-4 3.2.1.1 Printhead Removal .............. 3-4 3.2.1.2 Ribbon Mask Removal ............3-5 3.2.2 Electrical Board Removal ............. 3-6 3.2.2.1 Rear Cover Removal ............
  • Page 96 3.2.6.16 Platen Removal ............... 3-26 3.2.6.17 Paper Jam Sensor / Rear Paper Sensor Removal..3-28 3.2.7 Lower Housing Assembly Removal........... 3-29 3.3 Reloading the Control Program ............3-30...

  • Page 97: Disassembly And Assembly

    Disassembly and Assembly 3.1 Overview This chapter describes the procedures for disassembling and assembling the printer. Be sure to read the precaution prior to disassembly and assembly. WARNING The temperature of the printhead can be very high during printing. Therefore, always make sure that the printhead is cool enough to handle it.

  • Page 98: Checks After Repair

    DLQ-3000+ 3.1.2 Checks after Repair The check list shown below contains items to be checked after repairing the printer. Make sure that you use the list to ensure that printer performance is up to the standard before returning the printer to the customer. Table 3-3.

  • Page 99: Disassembly And Assembly

    Disassembly and Assembly 3.2 Disassembly and Assembly This section describes how to disassemble the printer. Unless otherwise specified, no assembly procedures are included, since it is usually performed by reversing the disassembly procedures. Points to note at disassembling and assembling are described under the heading WORK POINTS.

  • Page 100: Printhead Replacement

    DLQ-3000+ 3.2.1 Printhead Replacement 3.2.1.1 Printhead Removal You can remove the printhead without removing the upper housing assembly or printer mechanism. Step 1) Open the printer cover assembly, and remove 2 screws (CBS, 3X12) securing the printhead. Step 2) Lift up the printhead a little and release the head FFCs from the clips in the CR assembly.

  • Page 101: Ribbon Mask Removal

    Disassembly and Assembly 3.2.1.2 Ribbon Mask Removal This section describes how to remove the ribbon mask holder which must be removed when adjusting the platen gap. (Refer to Chapter 4 Adjustment.) Step 1) Remove the printhead. (See Section 3.2.1.1.) Step 2) Release the harnesses for the PEW sensors from the cable clamp. Step 3) Flip the paper eject lever assembly toward the front.

  • Page 102: Electrical Board Removal

    DLQ-3000+ 3.2.2 Electrical Board Removal The electrical circuit for this printer consists of the C210 MAIN board and C124 PSB/PSE board. You can remove this board by removing the rear cover only. 3.2.2.1 Rear Cover Removal Step 1) Remove 2 screws (CBS, 3X12) securing the upper connector cover, and remove the upper connector cover.

  • Page 103: C210 Main Board Removal

    Disassembly and Assembly 3.2.2.2 C210 MAIN Board Removal Step 1) Remove the rear cover. (See Section 3.2.2.1.) Step 2) Remove 1 screw (CBS, 3x8) securing the C210 MAIN board and the FG terminal from the control panel to the shield plate. Step 3) Disconnect all harnesses from the connectors on the C210 MAIN board.
  • Page 104 DLQ-3000+ WORK POINT When connecting the connectors, connect one to the other of the same color. Pay special attention to CN1 (red harness) and CN2 (blue harness). If they are connected improperly, the head coil or C210 MAIN board may be damaged. (See Figure 3-5.) Perform “Control program reload”...

  • Page 105: C124 Psb/Pse Board Removal

    Disassembly and Assembly 3.2.2.3 C124 PSB/PSE Board Removal Step 1) Remove the rear cover. (See Section 3.2.2.1.) Step 2) Remove 2 screws (CBS, 3X6) securing the power supply board and the C124 PSB/PSE board to the shield plate. Step 3) Disconnect all harnesses one by one from the connectors on the C124 PSB/PSE board as taking out the C124 PSB/PSE board on the power supply frame gradually, then remove the C124 PSB/PSE board.

  • Page 106: Control Panel Removal

    DLQ-3000+ 3.2.3 Control Panel Removal Step 1) Open the printer cover assembly. Step 2) Insert your hand to the back of the panel and release the hooks securing the control panel to the upper housing assembly. Then Remove the control panel along with the harnesses.

  • Page 107: Upper Housing Assembly Removal

    Disassembly and Assembly 3.2.5 Upper Housing Assembly Removal Step 1) Remove the knob and the release lever. Step 2) Open the printer cover assembly. Step 3) Remove the control panel. (See Section 3.2.3.) Step 4) Remove the adjust switch. (See Section 3.2.4.) Step 5) Disconnect the harness (red cable from the printer) from the connector (red cable from the interlock switch) located under the control panel.

  • Page 108: Printer Mechanism Removal

    DLQ-3000+ 3.2.6 Printer Mechanism Removal This section describes procedures for disassembling the printer mechanism. Figure 3-11. Printer Mechanism Removal 3-12 Rev. A...
  • Page 109 Disassembly and Assembly 3.2.6.1 Printer Mechanism Removal Step 1) Remove the upper housing assembly. (See Section 3.2.5.) Step 2) Remove the rear cover and a screw (CBB, 3x10) securing the grounding wire and the MAIN board to the main frame. Then remove the grounding wire. (See Section 3.2.2.2.) Step 3) Remove 4 FFCs and a harness (2 pins) for the rear paper sensor from the connectors on the sub board.

  • Page 110: Hp (Home Position) Sensor Assembly Removal

    DLQ-3000+ 3.2.6.2 HP (Home Position) Sensor Assembly Removal Step 1) Remove the printer mechanism. (See Section 3.2.6.1.) Step 2) Release the hooks securing the HP sensor assembly to the CR frame, and remove the sensor. Figure 3-13. HP Sensor Removal 3.2.6.3 Front Paper Sensor Removal Step 1) Remove the printer mechanism.

  • Page 111: Pf Sensor Assembly Removal

    Disassembly and Assembly 3.2.6.4 PF Sensor Assembly Removal Step 1) Remove the printer mechanism. (See Section 3.2.6.1.) Step 2) Release the hooks attaching the PF sensor to the left frame. Then remove the sensor. Figure 3-15 Removal. PF Sensor Assembly Removal 3.2.6.5 PF Motor Assembly Removal Step 1) Remove the printer mechanism.

  • Page 112: Cr Motor Assembly Removal

    DLQ-3000+ 3.2.6.6 CR Motor Assembly Removal Step 1) Remove the printer mechanism. (See Section 3.2.6.1.) Step 2) Remove 1 extension spring (3275) on the top edge of the printer mechanism to loosen the timing belt. Figure 3-17. CR Motor Assembly Removal Step 3) Remove 1 screw (CBS, 3X6) securing the grounding plate for the external cooling fan FFC, and remove the grounding plate for the FFC.

  • Page 113: Cs (Color Shift) Motor Assembly Removal

    Disassembly and Assembly 3.2.6.7 CS (Color Shift) Motor Assembly Removal Step 1) Remove the printer mechanism. (See Section 3.2.6.1.) Step 2) Slide the CR left, and disconnect the harness for the CS motor assembly from the CS board assembly located at the back of the CR. Figure 3-19.

  • Page 114: Paper Eject Lever Assembly

    DLQ-3000+ 3.2.6.8 Paper Eject Lever Assembly Step 1) Remove the printer mechanism. (See Section 3.2.6.1.) Step 2) Remove right and left extension springs which are crossed from the right and left ends of the paper eject lever assembly to the right and left frame assemblies, respectively.

  • Page 115: Pg Motor Removal

    Disassembly and Assembly 3.2.6.9 PG Motor Removal Step 1) Remove the printer mechanism. (See Section 3.2.6.1.) Step 2) Remove the harness for the PG motor from the cable clamp in the printer mechanism. Step 3) Remove 2 screws (CP, O, 3X6) securing the PG motor to the printer mechanism, and remove the PG motor.

  • Page 116: Cr Removal

    DLQ-3000+ 3.2.6.12 CR Removal Step 1) Remove the printer mechanism. (See Section 3.2.6.1.) Step 2) Release the hooks fixing the head cable holder to the CR frame, and remove the head cable holder along with the head FFC. Figure 3-23. Head Cable Holder Removal Step 3) Remove the head FFC from the head cable holder.
  • Page 117 Disassembly and Assembly Figure 3-25. CR Frame Removal Step 9) After removing the PG motor (See Section 3.2.6.9,) and the intermediate gear (See Figure 3-22.), remove the E-ring fixing the sector gear to the lower CR guide shaft. Then remove the gear. Step 10) Remove 2 screws (CBS, 3X6 ;...
  • Page 118 DLQ-3000+ WORK POINT When installing the timing belt to the CR, make 3 - 10 teeth of the belt appear, as shown in the figure below. When installing the upper CR guide shaft, ensure that the upper plain oil pad is installed between the upper CR guide shaft and the CR.

  • Page 119: Cs Board Assembly Removal

    Disassembly and Assembly 3.2.6.13 CS Board Assembly Removal Step 1) Remove the printhead. (See Section 3.2.1.1.) Step 2) Remove the CR. (See Section 3.2.6.12.) Step 3) Remove 1 screw (CBS, 3X12) securing the ribbon cartridge holder to the CR. Step 4) Release 6 hooks fixing the ribbon cartridge holder to the back of the CR. Then remove the ribbon cartridge holder.

  • Page 120: Pew Sensor Assembly Removal

    DLQ-3000+ CAUTION CS board assembly can be removed without removing the CR from the printer mechanism. In case you omit Step 2 (CR removal), note the followings: When removing the CS board assembly, note the direction in which the cutout part of the cam faces.

  • Page 121: Color Ribbon Sensor Removal

    Disassembly and Assembly 3.2.6.15 Color Ribbon Sensor Removal Step 1) Remove the printhead. (See Section 3.2.1.1.) Step 2) Remove the CR. (See Section 3.2.6.12.) Step 3) Remove the ribbon cartridge holder. (See Section 3.2.6.13, Step 4.) Step 4) Disconnect the harness for the color ribbon sensor from the connector in the CS board assembly.

  • Page 122: Platen Removal

    DLQ-3000+ 3.2.6.16 Platen Removal Step 1) Remove the printer mechanism. (See Section 3.2.6.1.) Step 2) Remove the CR. (See Section 3.2.6.12.) Step 3) Loosen 2 screws (CP, O, 3X6) securing the PF motor assembly to the right frame and the PF tension shaft. Then slide the PF motor to the front and remove the rear and front PF timing belts.
  • Page 123 Disassembly and Assembly Step 6) Turn the platen shaft busing at the right end of the paper loading drive roller to release it. Step 7) Shift the paper loading drive shaft right, and remove the shaft by moving it left. Step 8) Remove the spacer attached to the front paper sensor, and disengage the detection lever from the paper guide plate.

  • Page 124: Paper Jam Sensor / Rear Paper Sensor Removal

    DLQ-3000+ 3.2.6.17 Paper Jam Sensor / Rear Paper Sensor Removal Step 1) Remove the printer mechanism. (See Section 3.2.6.1.) Step 2) Remove the harness for the rear paper sensor from the cable clamp in the printer mechanism. Step 3) Remove the HP sensor assembly. (See Section 3.2.6.2.) Step 4) Remove the CR.

  • Page 125: Lower Housing Assembly Removal

    Disassembly and Assembly 3.2.7 Lower Housing Assembly Removal Step 1) Remove the rear cover. (See Section 3.2.2.1.) Step 2) Remove the C210 MAIN board and C124 PSB/PSE board. (See Section 3.2.2.2 and Section 3.2.2.3.) Step 3) Remove the upper housing assembly. (See Section 3.2.5.) Step 4) Remove the printer mechanism.

  • Page 126: Reloading The Control Program

    DLQ-3000+ 3.3 Reloading the Control Program If the printer control program of this printer is stored in Flash memory, the program must be reloaded through a parallel interface. This operation is especially required when the C210 MAIN board is replaced, since the control program is not equipped with the new board. This section describes procedure for reloading the printer control program.

  • Page 127: Adjustment

    Chapter 4 Adjustment 4.1 Overview ....................4-1 4.2 Adjustment....................4-2 4.2.1 Platen Gap (PG) Adjustment ............4-2 4.2.1.1 Parallelism Adjustment............4-3 4.2.1.2 PG Reference Value............4-4 4.2.2 Belt Tension Adjustment .............. 4-8 4.2.3 Customer Data Setting..............4-9 4.2.4 Bi-d Adjustment................4-10...

  • Page 128: Overview

    Adjustment 4.1 Overview This chapter describes adjustments required after disassembling the printer or replacing parts or units. Table 4-1 lists the disassembled/removed parts/units and corresponding adjustment items. Perform adjustment in the order listed. Table 4-1. Adjustment Item Disassemble/Removed Parts/Units Adjustment Items Printhead removal/replacement PG adjustment Main control board replacement...

  • Page 129: Adjustment

    DLQ-3000+ 4.2 Adjustment 4.2.1 Platen Gap (PG) Adjustment Platen gap adjustment involves the following operations: CR guide shaft parallelism adjustment Platen gap reference value measurement and write operation CR guide shaft parallelism adjustment The parallelism adjust bushing rotates eccentrically toward the center of the location hole in the right side frame, and it makes the right end of the CR guide shaft move toward or from the platen roller as the parallelism adjust bushing rotates.

  • Page 130: Parallelism Adjustment

    Adjustment 4.2.1.1 Parallelism Adjustment Step 1) Remove the upper housing assembly. (See Section 3.2.5.) Step 2) Remove the printhead. (See Section 3.2.1.1.) Step 3) Remove the ribbon mask. (See Section 3.2.1.2.) Step 4) Reinstall the prnthead. Step 5) Open the paper eject lever assembly. Loosen 2 screws (CBS, 3x6 and CP (O), 3x10) securing the lower CR guide lever to the right frame enough to move the lever.

  • Page 131: Pg Reference Value

    DLQ-3000+ 4.2.1.2 PG Reference Value Platen gap reference value measurement Step 1) Turn the platen roller to set the white eccentricity mark to the top. (This operation sets the PG narrowest.) Figure 4-2. Eccentricity Mark Step 2) Set the release lever to the cut sheet mode. Step 3) Set the PG adjust lever to the “Auto”...
  • Page 132 Adjustment Step 10) Input “2” to select “2. PLATEN GAP MEASUREMENT”, and the following menu appears on the screen: Set the thickness 0.39mm. : [RETURN] key input. Step 11) Insert the thickness gauge (0.39 mm) between the printhead and the platen roller. Step 12) Using “Space”, “8”, “2”...
  • Page 133 DLQ-3000+ Platen gap reference value write operation Step 1) Input “3” to select “3. PLATEN GAP INPUT”, and the determined “BETA” values for 3 thickness gauges are indicated on the screen. PLATEN INPUT 0.39 mm BETA 1 = 0.55 mm BETA 2 = 0.71 mm BETA 3 = [Return] key input Step 2) Ensure that the indicated values are correct and press “Return”...
  • Page 134 Adjustment PG adjustment value verification Step 1) Install the ribbon mask and the ink ribbon to the printer and the CR, respectively. (Make sure that the printer power is off and the printer power cable is unplugged from the AC power socket.) Step 2) Switch the release lever setting to the continuous paper mode and set the paper which meets the specification to the tractor.

  • Page 135: Belt Tension Adjustment

    DLQ-3000+ 4.2.2 Belt Tension Adjustment Perform this adjustment whenever you removed or replaced the PF motor. Step 1) Loosen 2 screws fixing the PF motor enough to move the motor. Step 2) Install the front and rear PF timing belts. Step 3) Press down the tension gauge onto the PF tension shaft at the angle of 45 .

  • Page 136: Customer Data Setting

    Adjustment 4.2.3 Customer Data Setting This operation is required when the main control board is replaced or default values must be reset to the factory values. This operation does not require any adjustment program but the panel operation. Step 1) Turn the printer on. Step 2) Press the button “SelecType”...

  • Page 137: Bi-D Adjustment

    DLQ-3000+ 4.2.4 Bi-d Adjustment Make this adjustment after any of the following units is replaced: Printer mechanism Main control board CR unit Timing belt CR motor This adjustment can be performed with either the adjustment program or control panel operation. This section, however, only refers to the procedure with the adjustment program. (See Chapter 1, Section 1.4.4.1 for Bi-D adjustment performed through the control panel.) Step 1) Connect the printer and the host computer with a parallel interface cable, and turn the printer on first then the computer.
  • Page 138 Adjustment Step 5) Input “0” (initialization value) for the draft mode and press “Return” key. Then perform the same operation for the Bit Map and LQ modes as they appear. When the last value (for LQ) is input, the message on the screen is as shown below: Bi-D ADJUSTMENT DRAFT (-12 - 12)

  • Page 139: Troubleshooting

    Chapter 5 Troubleshooting 5.1 Overview ....................5-1 5.2 Unit Repair and Replacement ............... 5-2 5.3 Repair of C124 PSB/PSE Board ............5-11 5.4 Repair of C210 MAIN Board Component ........... 5-14 5.5 Repair of the Printer Mechanism ............5-18...

  • Page 140: Overview

    Troubleshooting 5.1 Overview This chapter describes how to solve printer’s abnormal operations. Since abnormal phenomenon varies in wade range, be sure to follow the instruction given here for proper judgments and remedies. Figure 5-1. Troubleshooting Procedure The first step of the procedure consists of unit replacement. After any unit is replaced, carry out any necessary adjustments and lubrication.

  • Page 141: Unit Repair And Replacement

    DLQ-3000+ 5.2 Unit Repair and Replacement This section contains flowcharts which let you isolate faulty units by following the flowchart for the problem. Refer to Table 5-3 to determine the flowchart to follow. Table 5-3. Symptoms and Corresponding Flowchart Problem Description Flowchart No.
  • Page 142 Troubleshooting Flowchart 1 : The printer does not operate at all. Figure 5-2. Flowchart 1 Rev. A...
  • Page 143 DLQ-3000+ Flowchart 2 : The printer indicates an error after turning on the printer. Figure 5-3. Flowchart 2 Rev. A...
  • Page 144 Troubleshooting Flowchart 3 : Self-test does not print properly. Figure 5-4. Flowchart 3 Rev. A...
  • Page 145 DLQ-3000+ Flowchart 4 : Paper is fed abnormally. Figure 5-5. Flowchart 4 Rev. A...
  • Page 146 Troubleshooting Flowchart 5 : The control panel does not operate properly. Figure 5-6. Flowchart 5 Rev. A...
  • Page 147 DLQ-3000+ Flowchart 6 : The printer does not operate properly. Figure 5-7. Flowchart 6 Rev. A...
  • Page 148 Troubleshooting Table 5-4. Output Voltage of the PSB/PSE Board Connector No. Pin No. Output voltage 1,2,3 +35 V (CH.B) 4,5,6 Gp B 9,10 +5 V 1,2,3 +35 V (CH.A) 4,5,6 Gp A Figure 5-8. Printhead Connector Pin Assignment Head coil resistance can be measured between the same numbered common terminal and wire. Normal resistance value for the printhead coil is: 8.19 ±...
  • Page 149 DLQ-3000+ Use a multimeter to check the motor coil resistance and transistor continuity, as shown in Table 5- 5, Table 5-6 and Table 5-7. Table 5-5. Motor Coil Resistance Connector No. Common Test pin Test method Normal value pin No. 1,2,3,4 Place 1 lead on pin 5 or pin 6, Approximately...

  • Page 150: Repair Of C124 Psb/Pse Board

    Troubleshooting 5.3 Repair of C124 PSB/PSE Board This section describes how to repair the PSB/PSE board to the component. Table 5-8 shows the abnormal conditions and corresponding causes, check points and solutions. Select the condition from the table and perform any necessary check and repair. Table 5-8.
  • Page 151 DLQ-3000+ Table 5-9. C124 PSB/PSE Board Repair (continued) Condition Cause Check point Solution Symptom : Normal voltage is not output. (continued) Check T101/T201 for the followings: (continued) T101 or T201 is Replace the All output defective. Pins 6/7 for the input voltage to the PSB/PSE board, voltages are primary coil...
  • Page 152 Troubleshooting Table 5-10 . C124 PSB/PSE Board Repair (continued) Condition Cause Check point Solution Symptom : Normal voltage is not output. (continued) Check the waveform output from pin (continued) +35 VDC Replace the 4 of the photo-coupler PC101/ PC201 is All output stabilizing circuit PSB/PSE board...

  • Page 153: Repair Of C210 Main Board Component

    DLQ-3000+ 5.4 Repair of C210 MAIN Board Component Table 5-11. Repair of C210 MAIN Board Condition Cause Check point Solution Symptom : The printer does not operate at all. After turning on the printer, check if Reset signal is Reset circuit is Replace the the signal output from pin 1 on IC22 not released.
  • Page 154 Troubleshooting Table 5-12. Repair of C210 MAIN Board Condition Cause Check point Solution Symptom :An error has occurred. Check the voltages output from pin “Fatal error” +35 VDC line Replace the 88 and pin 89 of IC16. monitor circuit is main control If the output voltages are correct, defective.
  • Page 155 DLQ-3000+ Table 5-13. Repair of C210 MAIN Board (continued) Condition Cause Check point Solution Symptom : Abnormal printing If some particular dots are missing or Printhead Printhead control Replace the bad, check which head driver is control circuit circuit is main control causing the problem, the driver for operates...
  • Page 156 Troubleshooting Table 5-14. Repair of C210 MAIN Board (continued) Condition Cause Check point Solution Symptom : Abnormal printing (continued) Check is the fuse F1 is blown out. If it (continued) Fuse F1 is Replace the is, check peripheral parts before defective.

  • Page 157: Repair Of The Printer Mechanism

    DLQ-3000+ 5.5 Repair of the Printer Mechanism This section consists of tables which contains symptoms, conditions, causes, check points and solutions you need in troubleshooting problems with units in the printer mechanism. Table 5-15 Repair of the Printer Mechanism Condition Cause Check point Solution...
  • Page 158 Troubleshooting Table 5-16. Repair of the Printer Mechanism Condition Cause Check point Solution Symptom : Self-test does not run properly. (continued) PG adjustment Platen gap is not Check point: Check for the proper platen mechanism is not adjusted properly. gap. Solution: Adjust the platen gap.
  • Page 159 DLQ-3000+ Table 5-17. Repair of the Printer Mechanism Condition Cause Check point Solution Symptom :Paper is smudged with ink. Ink smudges in the Ribbon mask hole is Check point: Check if the ribbon mask hole printed area. damaged. is damaged. Solution: Replace the ribbon mask.

  • Page 160: Maintenance

    Chapter 6 Maintenance 6.1 Maintenance.................... 6-1 6.1.1 Lubrication and Adhesion ............6-1...

  • Page 161: Lubrication And Adhesion

    Application of proper lubricant has a substantial effect on the printer condition and durability. In particular, lubricating at low temperature needs special care. Therefore, be sure to use lubricants specified based on the experiments conducted by EPSON and technical information in wide range.
  • Page 162 DLQ-3000+ Table 6-3. Adhering Points Ref. No. Adhering points The point where the top side of the PGHP sensor assembly and left frame join. 2 points in the CR assembly where the timing belt is inserted. 2 points where the parallelism adjust bushing and right main frame join.
  • Page 163 Maintenance Figure 6-1. Lubricating / Adhering Points (1) Rev. A...
  • Page 164 DLQ-3000+ Figure 6-2. Lubricating / Adhering Points (2) Rev. A...
  • Page 165 Appendix A.1 Connector Summary ................A-1 A.2 Circuit Diagrams ................... A-7 A.3 Circuit Board Component Layout ............. A-14 A.4 Exploded Diagram ................A-18 A.5 Dimensions and Weight ..............A-22...

  • Page 166: Connector Summary

    Appendix A.1 Connector Summary This section describes the interconnection of the main components and connector pin assignment. Figure A-1 shows the interconnection of the main components. Figure A-1. Interconnection of the Main Components Rev. A...
  • Page 167 DLQ-3000+ Table A-1. Connector Assignment for the Main Components Board Description Connector for printhead Connector for printhead Connector for ribbon motor, color ribbon cartridge sensor, color HP sensor, PWS sensor, rear paper sensor, paper jam sensor, PEWR/L sensors Connector for CR motor, PF motor, PG motor Connector for head cooling fan, HP sensor, front paper sensor, CSF PQ sensor, CSF sensor, Adjust switch, Release sensor, PGHP sensor...
  • Page 168 Appendix Table A-2. Connector Pin Assignment (CN1) Pin No. Signal name Description HD15 Pin 15 signal – COM6/22 Pins 6/22 common – COM11 Pin11 common – COM3/19 Pins 3/19 common HD23 Pin 23 signal – COM7/15 Pins 7/15 common HD22 Pin 22signal HD19 Pin 19 signal...
  • Page 169 DLQ-3000+ Table A-4. Connector Pin Assignment (CN3) Pin No. Signal name Description – +5VDC line – PEWCOM PEW sensor common CSHOME CS HP sensor signal – Ground PEWR Right PEW sensor signal PEWL Left PEW sensor signal – RFCOM Ribbon motor common RF-B Ribbon motor phase /B drive signal RF-A...
  • Page 170 Appendix Table A-6. Connector Pin Assignment (CN5) Pin No. Signal name Description – CSFGND Ground CSF sensor signal CSF PQ sensor signal – CSFVCC CSF power – PGENGND PG encoder ground PGENCA PG encoder phase A signal PGENCB PG encoder phase B signal –...
  • Page 171 DLQ-3000+ Rev. A...

  • Page 172: Circuit Diagrams

    Appendix A.2 Circuit Diagrams Figure A-2. C210 MAIN Board Circuit Diagram (1/2) Rev. A...
  • Page 173 DLQ-3000+ Rev. A...
  • Page 174 Appendix Figure A-3. C210 MAIN Board Circuit Diagram (2/2) Rev. A...
  • Page 175 DLQ-3000+ A-10 Rev. A...
  • Page 176 Appendix Figure A-4. Sub Board Circuit Diagram A-11 Rev. A...
  • Page 177 DLQ-3000+ Figure A-5. C124 PSB Board Circuit Diagram A-12 Rev. A...
  • Page 178 Appendix Figure A-6. C124 PSE Board Circuit Diagram A-13 Rev. A...

  • Page 179: Circuit Board Component Layout

    DLQ-3000+ A.3 Circuit Board Component Layout Figure A-7. C210 MAIN Board Component Layout (1/2) A-14 Rev. A...
  • Page 180 Appendix Figure A-8. C210 MAIN Board Component Layout (2/2) A-15 Rev. A...
  • Page 181 DLQ-3000+ Figure A-9. C124 PSB Board Component Layout A-16 Rev. A...
  • Page 182 Appendix Figure A-10. C124 PSE Board Component Layout A-17 Rev. A...

  • Page 183: Exploded Diagram

    DLQ-3000+ A.4 Exploded Diagram Figure A-11. Exploded Diagram (1) A-18 Rev. A...
  • Page 184 Appendix Figure A-12. Exploded Diagram (2) A-19 Rev. A...
  • Page 185 DLQ-3000+ Figure A-13. Exploded Diagram (3) A-20 Rev. A...
  • Page 186 Appendix Figure A-14. Exploded Diagram (4) A-21 Rev. A...

  • Page 187: Dimensions And Weight

    DLQ-3000+ A.5 Dimensions and Weight Physical dimensions (W x H x D): 678 mm x 285 mm x 509 mm (26.7” x 11.2” x 20.0”) (without CSF) Weight (without CSF): 16.1 Kg (35.5 lb.) Figure A-15. Physical Dimensions and Weight of DLQ-3000+ A-22 Rev.
  • Page 188 EPSON OVERSEAS MARKETING LOCATIONS EPSON AMERICA, Inc. EPSON DEUTCHLAND GmBH 20770 Madrona Avenue, Zülpicher Straße 6, 4549 Düsseldorf P.O. Box 2842 Germany Torrance, CA 90509-2842 Phone: (800)922-8911 Phone: (0211)56030 Fax: (310)782-5220 Telex: 8584786 EPSON UK LTD. EPSON FRANCE S.A. Campus 100, Maylands Avenue,...
  • Page 189 EPSON SEIKO EPSON CORPORATION...

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