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Epson ActionPrinter 3000 LQ-200 Service Manual

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3000
Service Manual
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Summary of Contents for Epson ActionPrinter 3000 LQ-200

  • Page 1 ® EPSON LQ-200 ActionPrinter 3000 Service Manual Revision Level I@ Printed on recycled paper.

  • Page 2: Fcc Compliance Statement For American Users

    If this equipment has more than one interface connector, do not leave cables connected to unused interfaces. Changes or modifications not expressly approved by Epson America, Inc., could void the user’s authority to operate this equipment. For Canadian Users...

  • Page 3: Copyright Notice

    While every precaution has been taken in the preparation of this publication, Epson America assumes no responsibility for errors or omissions. Neither is any liability assumed for damages resulting from the use of the information contained herein.

  • Page 4: Table Of Contents

    General Description Chapter 1 Features ................... l-l Specifications ................... 1-3 Hardware Specifications ............l-3 Firmware Specifications (ESCYP) ..........l-9 Parallel Interface ................1-14 DIP Switches and Jumpers.............. 1-18 DIP Switches................l-18 Jumpers ..................l-20 Operating Instructions ..............1-21 SelecType ................... 1-21 Self Test ..................
  • Page 5 Disassembly and Assembly Chapter 3 General Repair Information ............3-l Tools ................... 3-2 Small Parts ................3-3 Service Checklist ............... 3-5 Disassembly and Assembly ............. 3-6 Removing the Printhead ............3-7 Removing the Case..............3-8 Removing the Circuit Boards............ 3-11 Removing the Printer Mechanism ..........
  • Page 6 Appendix Connector Summary................ Circuit Diagrams ................A-3 Circuit Board Component Layout ........... Exploded Diagrams................A-8 A-12 Case Outline Drawings..............Subsequent product modifications will be brought to your attention via Service Bulletins. Please revise the text as bulletins are received. This document is subject to change without notice. Note: This manual uses minus signs (-) in front of signals to indicate that they are active LOW signals.
  • Page 7 Chapter 1 General Description Features ................... Specifications ................... Hardware Specifications ............Firmware Specifications (ESCYP) ..........1-14 Parallel Interface ................1-18 DIP Switches and Jumpers .............. 1-18 DIP Switches................1-20 Jumpers ..................1-21 Operating Instructions ..............1-21 SelecType ................... 1-21 Self Test ..................1-22 Demonstration ................
  • Page 8 1-31 Figure 1-15. Transformer .............. Figure 1-16. Model 5ClO Printer Mechanism ......1-32 Figure 1-17. Housing..............1-33 Tables Optional Units ............Table 1-1. Specifications for Single Sheet Paper ...... 1-4 Table 1-2. Specifications for Continuous Paper......1-4 Table 1-3. Specifications for Labels ...........

  • Page 9: Chapter 1 General Description

    160 cps (draft, 10 cpi) 64 cps (letter quality, 12 cpi) 53 cps (letter quality, 10 cpi) Clear, easy-to-read printing with standard Epson fonts Seven built-in letter quality (LQ) fonts (Roman, Sans Serif, Courier, Prestige, Script, OCR-B, and Orator) Direct built-in font selection using control panel buttons...
  • Page 10 General Description Table l-l lists the optional units available for the printer and Figure l-l shows the printer. Table 1-1. Optional Units Description Model (CSF) Cut sheet feeder 7341 LQ-200/AP300 Figure 1-1. LQ-2OO/AP3000...

  • Page 11: Specifications

    General Description Specifications This section provides the specifications for the LQ-200/AP3000. Hardware Specifications Printing Method Serial, impact, dot matrix Pin Configuration 24 wires; 12 2 staggered, diameter 0.008 inches (0.2 mm) Figure 1-2. Pin Configuration Feeding Methods Friction feed, tractor feed Line Spacing 1/6 inch or programmable in units of 1/180 inch Paper Insertion...

  • Page 12: Table 1-2. Specifications For Single Sheet Paper

    General Description Table 1-2. Specifications for Single Sheet Paper Table 1-3. Specifications for Continuous Paper Table 1-4. Specifications for Labels LQ-2OO/AP3O00...

  • Page 13: Printable Area

    General Description Printable Area Figure 1-3. Printable Area for Single Sheet Paper Notes: 0.12 inches (3 mm) or more using 7.2 to 9.0 inch (182 to 229 mm) wide paper. 1.08 inches (27 mm) or more using 10.1 inch (257 mm) wide paper. The lowest print position (0.54 inches or 13.5 mm) is only for reference.
  • Page 14 General Description Figure 1-4. Printable Area Continuous Paper Notes: 0.52 inches (13 mm) or more using 4.0 to 9.5 inch (101 to 242 mm) wide paper. 1.04 inches (26 mm) or more using 10.0 inch (254 mm) wide paper. 0.52 inches (13 mm) or more using 4.0 to 9.5 inch (101 to 242 mm) wide paper. ‘2) 1.04 inches (26 mm) or more using 10.0 inch (254 mm) wide paper.
  • Page 15 General Description Ink Ribbon Type Black ribbon cartridge #7753 Film ribbon cartridge #7768 Color Black Life 2 million characters at 48 dots/character (black ribbon) 0.2 million characters using LQ characters (film ribbon) 11.72 inches (width) 1.36 inches (height) Dimensions of Ribbon 2.88 inches (depth) (293 mm 34 mm...
  • Page 16 General Description Electrical Specifications Power Conditions 120 VAC * 10% 49.5 to 50.5 Hz (50 Hz model) Frequency Range 59.5 to 60.5 Hz (60 Hz model) Current 1.8 A Rating Power Approximately 38 W (during self test in draft Consumption mode at 10 cpi) 10 megohms minimum between AC line and Insulation Resistance...

  • Page 17: Firmware Specifications (Escyp

    General Description Firmware Specifications (ESC/P) ESC/P level ESC/P 84 (Epson Standard Code for Printers) Control Codes Bidirectional (text) Printing Direction Bidirectional (bit image) when DIP switch 2-5 is on Unidirectional (bit image) when DIP switch 2-5 is off 8KB when DIP switch 2-4 is on...
  • Page 18 General Description You can select and mix any of the following printing modes, Printing Modes except you cannot select 15 cpi and condensed printing at the same time. Draft or letter quality printing Character pitch (10 cpi, 12 cpi, 15 cpi, or proportional printing) Condensed Double-width...

  • Page 19: Table 1-6. Printing Modes

    General Description Table 1-6. Printing Modes Notes: Max is the value appropriate for the maximum width character. Min is the value appropriate for the minimum width character. - means that the printer automatically selects LQ mode when you select proportional pitch. LQ-200/AP3000 1-11...

  • Page 20: Table 1-7. Character Matrix And Character Size

    General Description Table 1-7. Character Matrix and Character Size Notes: HDD is the horizontal dot density in dots per inch. The face matrix and character size indicate the size of the maximum character. This value depends on the paper, the ribbon, and other variables. Unit ESC SP indicates the minimum length to be added to the right of the character specified using ESC SP.
  • Page 21 General Description (Normal character) Figure 1-5. Character Matrix 1-13 LG-200/AP3000...

  • Page 22: Parallel Interface

    General Description Parallel Interface This section provides the specifications for the standard parallel interface. Data Format 8-bit parallel -STROBE signal Synchronization BUSY and -ACKNLG signal Handshaking Signal Level TTL compatible Adaptable Connector 57-30360 (Amphenol) or equivalent Data Transmission Timing See Figure 1-6. Figure 1-6.

  • Page 23: Table 1-8. Connector Pin Assignments And Signal Functions

    General Description Table 1-8 shows the connector pin assignments and signal functions of the 8-bit parallel interface. Table 1-8. Connector Pin Assignments and Signal Functions 1-15 LQ-200/AP3000...
  • Page 24 General Description Table 1-9. Connector Pin Assignments and Signal Functions (cont.) Notes: DIR refers to the direction of signal flow as viewed from the printer. Return Pin No. denotes a twisted pair return line. The cable must be shielded to prevent noise. All interface conditions are based on TTL levels.
  • Page 25 Description General Table 1-9 shows the handshaking (DC1/DC3) protocol. Table 1-9. Handshaking (DC1/DC3) Protocol Notes: 1. Table 1-9 assumes that no *ERROR status exists other than that due to off line mode. When the printer receives a DC3 code, it ignores input data. When the printer receives a DC1 code, data transmission continues.

  • Page 26: Dip Switches And Jumpers

    DIP Switches and Jumpers This section describes the functions of the DIP switches and jumpers. DIP Switches The LQ-200/AP3000 has two sets of DIP switches underneath the cartridge slot cover. Tables 1-10 through 1-15 describe the functions of these DIP switches. The printer reads the DIP switch settings only at power on or after receiving the -INIT signal.

  • Page 27: Table 1-12. International Character Set And Character Table Selection

    General Description Table 1-12. International Character Set and Character Table Selection Table 1-13. Font Selection 1-19 LQ-200/AP3000...

  • Page 28: Jumpers

    General Description Table 1-14. Page Length Selection Table 1-15. Character Pitch Selection Jumpers Jumper 6, located underneath the cartridge slot cover, is user selectable. If you connect jumper 6, the -SLCT-IN signal is LOW and the printer ignores the DC1/DC3 control codes. 1-20 LQ-200/AP3000...

  • Page 29: Operating Instructions

    General Description Operating Instructions This section explains how to use SelecType, the self test, the demonstration, the hexadecimal dump, and other functions. SelecType The SelecType function allows you to easily choose any of the seven built-in LQ fonts when the printer is on line and not printing. To select a font, you press the FORM FEED button until the two SelecType indicator lights match the desired font.

  • Page 30: Demonstration

    FEED and ON LINE buttons. ® THE EPSON LQ-200 The Epson LQ-200 is the affordable, versatile, narrow carriage 24- for home and small business combining pin dot matrix printer excellent high resolution printing, convenient paper handling, and a new standard for economical printing.

  • Page 31: Hexadecimal Dump Function

    General Description Hexadecimal Dump Function You use the hexadecimal dump function to check the data the printer is receiving from the host. To turn on hexadecimal dump mode, turn on the printer while holding down the LINE FEED and FORM FEED buttons. In hexadecimal dump mode, the printer prints the hexadecimal representation of the input data and the corresponding ASCII characters.

  • Page 32: Bit Image Printing

    General Description Bit Image Printing The LQ-200/AP3000 has four standard print densities. They are listed below in dots per inch (dpi), including half dots. 120 dpi at triple speed 180 dpi at double speed 240 dpi at one and a half speed 360 dpi at normal speed Tables 1-16 and 1-17 show how the firmware handles the print densities.

  • Page 33: Error Conditions

    General Description Error Conditions If any of the following error conditions occurs, the printer goes off line. The printer cannot detect the home position at printer mechanism initialization. The printer detects the home position during printing. You press the ON LINE button when the printer is on line, and the printer goes off line.

  • Page 34: Printer Initialization

    General Description Printer Initialization There are two initialization methods: hardware initialization and software initialization. Hardware initialization Hardware initialization takes place when you turn on the printer (and the AC power cord is plugged in) or when the printer receives the -1NIT signal. During hardware initialization, the printer: Initializes the printer mechanism.

  • Page 35: Default Values

    General Description Default Values When the printer is initialized, the following default values take effect: The current paper position becomes the top-of-form position. Page Position Left and Right Released Margins l/6 inch Line Spacing Cleared Vertical Tabs Every 8 characters (relative) Horizontal Tabs Channel 0 VFU Channel...

  • Page 36: Head Adjust Lever

    General Description Head Adjust Lever You must move the head adjust lever to the position appropriate for your paper’s thickness. See Table 1-18 and Figure 1-10. Table 1-18. Head Adjust Lever Note: If the print density is light, move the head adjust lever one step lower. Figure 1-10.

  • Page 37: Printhead Protection During Heavy Duty Printing

    General Description Printhead Protection During Heavy Duty Printing The printhead is protected from overheating and voltage drops to the printhead driver. If the printhead temperature exceeds the upper limit, printing stops automatically until the printhead temperature drops to the required value. If heavy duty printing causes the printhead driver voltage to drop below the lower limit, printing stops.

  • Page 38: Co64 Main Pcb

    General Description C064 MAIN PCB The µPD7810HG CPU on the CO64 MAIN PCB simplifies the circuit design of the main control board and controls all of the printer’s main functions. Figure 1-12. C064 Main PCB Control Panel PCB The control panel PCB is the control panel. It includes the indicator LEDs, the control panel buttons, and the buzzer.

  • Page 39: Pebfil-Ii Pcb

    General Description PEBFIL-II PCB The PEBFIL-II PCB filter board eliminates noise from the AC line to the printer and from the printer to the outer line. The fuse on this board prevents overheating. Figure 1-14. PEBFiL-II PCB Transformer The transformer converts the input AC from the filter circuit into 28 VAC output to supply the required voltage to the control circuit board.

  • Page 40: Model 5Clo Printer Mechanism

    General Description Model 5Cl0 Printer Mechanism The model X10 printer mechanism is designed specifically for the LQ-200/AP3000. Its components include the carriage motor, carriage mechanism, paper feed motor, paper feed mechanism, ribbon feed mechanism, printhead, and sensors. Figure 1-16. Model 5C10 Printer Mechanism LQ-200/AP3000 1-32...

  • Page 41: Housing

    General Description Housing The housing consists of the upper and lower cases. The upper case houses the control panel. The lower case contains the printer mechanism and the main control board. Figure 1-17. Housing LQ-200/AP3000 1-33...

  • Page 42: Figure 1-15. Transformer

    Chapter 2 Principles of Operation Overview ..................2-1 2-1 - Connector Summary ..............Overview of Printer Mechanism Operation ......2-3 Sensors ................. 2-4 Motors .................. Printhead ................Circuit Overview ................ Firmware Overview ..............Principles of Operation ..............Power Supply Circuit ..............Power supply circuit block diagram ........
  • Page 43 Figures Cable Connections ............ 2-2 Figure 2-1. Printer Mechanism Block Diagram......2-3 Figure 2-2. Paper End Sensor ............. 2-4 Figure 2-3. Home Position Sensor ..........Figure 2-4. Thermal Sensor............Figure 2-5. Printhead..............2-6 Figure 2-6. Circuit Block Diagram ..........2-7 Figure 2-7.
  • Page 44 Figure 2-50. Relationship Between the Head Driver Voltage and the Print Driving Pulse Width....... 2-51 Figure 2-51. A/D Converter Circuit ..........2-53 Figure 2-52. Host Interface ............2-55 2-57 Figure 2-53. Ribbon Feed Mechanism .......... Tables Table 2-1. Board Connector Summary ........2-10 Table 2-2.

  • Page 45: Overview

    Principles of Operation Overview This chapter describes the signals at the connectors that link the printer’s primary components, including the printer mechanism, the power supply circuits, and the control circuits. This chapter also describes how the printer’s circuitry and the printer mechanism operate.
  • Page 46 Principles of Operation Figure 2-1. Cable Connections Note: CR = carriage PF = paper feed HP = home position LQ-200/AP3000...

  • Page 47: Overview Of Printer Mechanism Operation

    Principles of Operation Overview of Printer Mechanism Operation The model 5ClO printer mechanism is a serial, impact, dot matrix printer mechanism that prints at 180 dots per inch (dpi) in both the horizontal and vertical directions. Figure 2-2 is a block diagram of the printer mechanism. Figure 2-2.
  • Page 48 Principles of Operation Sensors The printer mechanism contains the following sensors: Paper end (PE) sensor Home position (HP) sensor Thermal sensor Paper end sensor The paper end sensor switch goes on when the paper runs out. One switch detects when the paper is out for both the rear and bottom paper slots. Figure 2-3 illustrates the paper end sensor.
  • Page 49 Principles of Operation Home position sensor The home position sensor switch is on when the carriage is at the home position. This sensor determines the reference position for the carriage drive. Figure 2-4 illustrates the home position sensor. Home position + on + LOW level Other position + off + HIGH level Figure 2-4.
  • Page 50 Motors The LQ-200/AP3000 has the following motors: Carriage motor (stepper motor) Paper feed motor (stepper motor) Carriage motor The carriage motor moves the carriage right and left along the platen. It is a four- phase, 48-step motor that uses either 1-2 or 2-2 phase excitation. An open loop system controls the carriage motor.

  • Page 51: Circuit Overview

    Principles of Operation Circuit Overview Figure 2-7 is a block diagram of the printer’s circuitry. Figure 2-7. Circuit Block Diagram Note: CG = character generator GA = gate array LQ-200/AP3000...

  • Page 52: Firmware Overview

    Principles of Operation Firmware Overview The printer uses a µPD7810HG CPU with 64KB of address space. Figure 2-8 shows a memory map of the address space. Figure 2-8. Memory Map (64 KB.) Note: CG = character generator GA = gate array LQ-200/AP3000...

  • Page 53: Principles Of Operation

    Principles of Operation Principles of Operation This section describes the operation of the printer’s components, including the power supply circuit, the reset circuit, the carriage mechanism, the paper feed mechanism, and the printhead. Power Supply Circuit This section describes how the power supply circuit operates. diagram Power supply circuit block 120 VAC is applied through the filter circuit to the step down transformer, which...
  • Page 54 Principles Operation Figure 2-9. Power Supply Circuit Block Diagram Table 2-2. Power Supply Applications LQ-2OO/AP3000 2-10...

  • Page 55: Chopper-Type Switching Regulator Circuit

    Principles of Operation Chopper-type switching regulator circuit The power supply circuit includes a chopper-type switching regulator. The step down circuit operates as follows: Figure 2-10. Step Down Circuit Figure 2-10 shows the chopper-type step down switching regulator circuit. When the transistor is on, voltage Vi is applied to coil L and capacitor C. Load current I1 flows and electromagnetic energy Wl accumulates in choke coil L.
  • Page 56 Principles of Operation Thus, Vo can be held constant by controlling Ton. Figure 2-11 shows the step down timing. Figure 2-11. Step Down Timing 2-12 LQ2OO/AP3000...

  • Page 57: Filter Circuit

    Principles of Operation Filter circuit The AC line voltage passes through the power switch and is input to the filter circuit. The PEBFIL-II board includes a fuse, Fl. The filter circuit attenuates external noise and inhibits the noise generated in the printer from propagating through the AC line.
  • Page 58 Principles of Operation Transformer The 120 VAC that passes through the filter circuit is transformed into 26 VAC and supplied to the main board. Figure 2-13 is a schematic drawing of the power transformer. 2-14 LQ-200/AP3000...

  • Page 59: Rectifier And Smoothing Circuit

    Principles of Operation Rectifier and smoothing circuit Diode bridge DB1 full wave rectifies the 26 VAC from the transformer’s secondary coil. Then smoothing capacitor C40 converts the 26 VAC into approximately 36 VDC. The +24 and +5 VDC voltages are converted from this DC voltage. The DC voltage is used as the power supply voltage for the switching regulator circuit at the next stage.
  • Page 60 Principles of Operation +5 VDC regulator circuit An NJM2355 switching regulator circuit is used for constant-frequency pulse width modulation. The rectifier and smoothing circuit employs an NJM2355 circuit configured as a chopper-type switching regulator circuit. Figure 2-15 illustrates the +5 VDC regulator circuit. Figure2-15.
  • Page 61 Principles of Operation The +5 VDC regulator circuit has a built-in oscillator. External components connected to pins 2 and 3 determine the oscillation frequency. R105 and C34 cause the circuit to oscillate at about 30 KHz. Figure 2-16 shows the oscillator waveform.
  • Page 62 Principles of Operation Figure 2-18 shows the output from AMP1. When the voltage at pin 4 becomes higher than that at pin 5 (over-voltage), pulse width modulation modulates the AMP1 output current and reduces the circuit’s output voltage. R108 and C35 compensate for phase lag in the error amplifier, preventing abnormal oscillation.

  • Page 63: Pulse Width Modulation Circuit

    Principles of Operation Pulse width modulation circuit This section describes how the pulse width modulation (PWM) comparator operates. Figure 2-19 shows the internal circuitry of the NJM2355 integrated circuit. In circuit 1, the output from AMP1 flows into the negative terminal of PWM comparator 1.
  • Page 64 Principles of Operation As shown in Figure 2-20, the dead-time control voltage controls the potential at the NJM2355 circuit when it is lower than the preset voltage or current value. When it exceeds the preset voltage, the error amplifier lowers it below the preset voltage.
  • Page 65 Principles of Operation +24 VDC regulator circuit The +24 VDC regulator circuit has approximately the same function and employs the same oscillation circuit as the +5 VDC regulator circuit. In the +24 VDC regulator circuit, error amplifier AMP2 is used for over-current control and AMP3 is used for constant voltage control.
  • Page 66 Principles of Operation Error amplifier AMP3 operates as follows. The negative terminal of AMP 3 receives Vref (5 V) and the voltage applied to the positive terminal is adjusted to 5 V. As shown in Figure 2-22, the output voltage is: ~(Rl14+R115) = 2 4z Jhms (9.1 K ohms + 2.4K ohms) = 23.96 V Figure 2-22.
  • Page 67 Principles of Operation If the current exceeds this value, over-current protection goes on to reduce the output voltage. Figure 2-23 illustrates over-current protection. Because pin 3 of IC1 is grounded, dead time does not apply in this case. Figure 2-23. Over-Current Protection 2-23 LQ200/AP3000...

  • Page 68: Vx Voltage Supply Circuit

    Principles of Operation Vx voltage supply circuit When the +24 V power supply line reaches 18.6 V (18 V + 0.6 V), transistors Q25 and Q26 go on and Vx (+5 v) is output. If the +24 V power supply line drops below 18.6 V, Q25 and Q26 go off and the Vx voltage is extinguished.

  • Page 69: Reset Circuit

    Principles of Operation Reset Circuit The reset circuit sends the -RESET signal to the -RESET terminal of CPU µPD7810HG (4B). The -RESET signal acts as a hardware initialization signal. Figure 2-25 shows the reset circuit. The reset circuit outputs the -RESET signal when any of the following occur: You turn the printer on or off.

  • Page 70: Init Signal Input From Cn

    Principles of Operation Power on or off D14, R69, and C26, shown in Figure 2-25, comprise an on/off reset circuit. This circuit causes the CPU to begin operation from address 0000H when you turn on the, power and it prevents CPU malfunctions when you turn off the power. The rising edge of the Vx voltage cancels the -RESET signal following a constant- time delay (R69 C26) produced by the gate array, resistor R69, and capacitor...
  • Page 71 Principles of Operation ROM cartridge installation and removal Figure 2-27 shows the -RESET pulse generation process after you install a ROM cartridge. A LOW signal flows into the -CAR terminal of the gate array (6C, the -DISC terminal (1) outputs a LOW signal, and the -Rout terminal (2) outputs a -RESET signal.
  • Page 72 Principles of Operation Figure 2-28 shows the -RESET pulse oscillation process after you remove a ROM cartridge. The -CAR terminal of the gate array (6C) receives a HIGH signal, the -DISC terminal outputs a LOW signal (1), and the -Rout terminal outputs a -RESET signal (2).

  • Page 73: Address Decoder And Bank Register

    Principles of Operation Address Decoder and Bank Register This section describes the address decoder and bank register. Address decoder The address decoder in gate array E01A05 (6C) outputs a chip select signal to the internal PROM (3C), 4MCG (5C), 1MCG (2C), RAM (2C), and HEAD gate array (7A) via address lines AB12 through AB15 and bank lines 7 and 6 in the gate array.

  • Page 74: Carriage Operation

    Principles of Operation Carriage Operation This section describes the carriage. Carriage mechanism The carriage mechanism includes the printhead, the carriage, the timing belt, the carriage motor, and the platen. Figure 2-29 shows the carriage mechanism. The timing belt is connected to the bottom of the carriage. It is driven by the carriage motor and moved via the belt-driven pulley.

  • Page 75: Carriage Motor Drive Circuit Block Diagram

    Principles of Operation Carriage motor specifications 4-phase, 48pole stepper motor V f 10% Drive Voltage 21 ohms f 7% at 77O F (25’ C) Coil Resistance 0.34 A, maximum (rush current) Current Driving: 0.3 A, typical (triple speed, 24 VI 0.23 A, typical (double speed, 1.5 speed, normal speed, 24 VI 0.17 A f 20%...
  • Page 76 Principles of Operation Gate array E0lA05 in the carriage motor drive circuit Gate array E0lA05 (6C) implements phase switching for the carriage motor, which is a stepper motor. The gate array first sets the excitation type (2-2 or 1-2 phase) and rotation direction (clockwise or counterclockwise).

  • Page 77: Carriage Motor Drive Circuit

    Principles of Operation Carriage motor drive circuit The LQ-200/AP3000 includes an STK-6981B, a hybrid integrated circuit used to drive stepper motors. The STK-6981B (ICSC) circuit drives the stepper motor under a constant current. An external voltage level determines the value of the current.
  • Page 78 Principles of Operation Figure 2-33. STK-6981B Circuit Diagram Note: Phase AB is equivalent to phase CD, which is shown in the figure above. 2-34 LQ-200/AP3000...
  • Page 79 Principles of Operation Reference voltage generation circuit Figure 2-34 shows the reference voltage generation circuit. Table 2-3 shows the reference voltages. Figure 2-34. Reference Voltage Generation Circuit Table 2-3. Reference Voltages 0.736 LQ-200/AP3000 2-35...
  • Page 80 Principles Operation Constant current drive circuit The carriage motor drive current is given by the following equation: When the carriage stops, CPU port PB5 is set to HIGH, the input to the chopping circuit becomes 0 V, and current is applied from the +5 V line to the motor via resistance Rl and diode Dl.
  • Page 81 Principles of Operation Table 2-4. Current Values for Reference Voltages Positive feedback through R9 generates a hysteresis in the comparator of ICl. The upper limit of the hysteresis is the reference voltage. The comparator works like a Schmitt trigger, sensing a difference when the inverse terminal feedback is slightly larger or smaller than the hysteresis level.
  • Page 82 Principles of Operation Figure 2-37. Schmitt Trigger Circuit Carriage motor software control This section describes the carriage motor software control. Excitation type Firmware determines the excitation. As shown in Table 2-5, the excitation is executed according to the carriage speed. Tables 2-6 and 2-7 show the motor drive sequence for each excitation system.
  • Page 83 Principles of Operation Table 2-6. Drive Sequence 2-2 Phase Excitation) Table 2-7. Drive Sequence Phase Excitation) (l-2 2-39...
  • Page 84 Principles of Operation The stepper that controls the carriage can hold the carriage at any position and freely switch its direction. An open loop system controls the carriage motor and switches the phase according to the set speed. The drive chopping current is switched at the carriage motor drive frequency. Figure 2-38 shows the relationship between drive speeds and switching current values.
  • Page 85 Principles of Operation Home position seek The home position seek function causes the carriage to move to the home position when the power goes on. Figure 2-39 shows how the home position seek function operates. When power is first applied, the printer executes 2-2 phase excitation for 20 or 30 ms (regardless of the phase switch setting).
  • Page 86 Principles of Operation Printing area The printing area starts 22 phase switches from the home position. Figure 2-40. Printing Area and Print Timing Abnormal carriage operation The LQ-200/AP3000 does not have a print timing signal PTS) sensor and cannot detect abnormal carriage operation. Therefore, an error does not occur if external forces hinder carriage movement.

  • Page 87: Paper Feeding

    Principles of Operation Paper Feeding This section describes how the printer feeds paper. Paper feed mechanism The LQ-200/AP3000 friction feeds single sheet paper and sprocket feeds continuous paper. The printer cover and the spring force of the two paper feed rollers hold the paper against the platen.
  • Page 88 Principles of Operation Sprocket feeding You place the holes in the paper over the sprocket pins on the sprocket wheel. The paper feed motor rotates the gears, via the pinion on the shaft of the motor, in the direction shown in Figure 2-42. The gear rotation causes the sprocket wheels to rotate and advances the paper in the direction shown in Figure 2-42.
  • Page 89 Principles of Operation Paper feed motor specifications 4-phase, 48pole stepper motor 24 VDC + 10% Drive Voltage 58 ohms f 7% at 77O F (25O C) Coil Resistance 2-2 phase excitation Phase Excitation 1.1 A, maximum (rush current) Current 0.30 A, typical Driving: Holding: 0.06 A 5 20 mA...

  • Page 90: Paper Feed Motor Software Control

    Principles of Operation Paper feed motor software control The paper feed motor is a 48-pole stepper motor. An open loop system controls the paper feed motor under 2-2 phase excitation. The motor feeds paper 1/180th of an inch for each step. Table 2-8 shows the paper feed motor excitation system when the motor is driven clockwise for forward paper feeding.

  • Page 91: Printhead

    Principles of Operation Printhead This section describes how the printhead operates. Printing This section describes how a dot wire prints. Figure 2-45 illustrates the printing operation. When the printing process begins, the actuating plate is engaged to the dot wire. When the dot wire’s head driving coil is energized, the actuating plate is attracted to the iron core.

  • Page 92: Printhead Drive Circuit Block Diagram

    Principles of Operation Printhead specifications Solenoids 24 solenoids inch (0.20 mm) Wire Diameter 0.008 2, staggered Pin Arrangement Drive Voltage VDC f 10% 19.1 k 1.0 ohms at 77O F (25O C) Coil Resistance Printhead drive circuit block diagram Gate array E05A02 is used as an 8-bit 3 data latch.
  • Page 93 Principles of Operation Gate array E05A02 in the printhead drive circuit The E05A02 gate array includes circuitry to interface the CPU and the printhead. This general purpose gate array has special commands that lighten the CPU’s load during printhead data output. Figure 2-47 is a block diagram of gate array E05A02.

  • Page 94: Printhead Drive Circuit

    Principles of Operation Printhead drive circuit CPU port PC6 adjusts the drive pulse width. The Vx voltage pulls up the output signals from the gate array to prevent printhead malfunctions. Figure 2-48. Printhead Drive Circuit 2-50 LQ-200/AP3000...

  • Page 95: Printhead Software Control

    Principles of Operation Printhead software control At 960 pps, one print cycle is performed at each phase switch step to meet the printhead’s specifications. (The printhead’s solenoid drive frequency is 960 Hz). The drive pulse width is adjusted using an A/D converter to detect the drive voltage.

  • Page 96: A/D Converter Circuit

    Principles of Operation A/D Converter Circuit Figure 2-51 shows the A/D converter circuit. The converter has the following functions: Monitors the +24 V line to determine the drive pulse width for the printhead. Monitors the temperature (the resistance) of the printhead. Reads the initial DIP switch settings.
  • Page 97 Principles of Operation Figure 2-51. A/D Converter Circuit LQ200/AP3000 2-53...
  • Page 98 Principles of Operation Table 2-9 shows the relationship between the scan lines and the DIP switches. LQ-2OO/AP3000 2-54...

  • Page 99: Host Interface

    Principles of Operation Host Interface Figure 2-52 shows the host interface circuit. -STROBE pulses from the host computer pass through the low-pass filter formed by R32 and C21 and then flow into the -STRB terminal. These pulses latch the parallel data and set the BUSY signal HIGH, inhibiting subsequent data transfer.

  • Page 100: Ribbon Feed Mechanism

    Principles of Operation Ribbon Feed Mechanism The ribbon feed mechanism consists of the ribbon cartridge and the ribbon feed section. Table 2-10 describes the ribbon feed gear train. Regardless of the timing belt direction, the gear train setup assures that the ribbon driving gear rotates only counterclockwise.
  • Page 101 Principles of Operation Figure 2-53. Ribbon Feed Mechanism LQ-200/AP3000 2-57...
  • Page 102 Chapter 3 Disassembly and Assembly General Repair Information ..............3-1 Tools ................... 3-2 Small Parts ................3-3 Service Checklist ................... 3-5 Disassembly and Assembly ..............3-6 Removing the Printhead ............3-7 Removing the Case ..............Removing the upper case ..........3-9 Removing the control panel ..........
  • Page 103 Figure 3-19. Assembling the Platen Unit........3-25 Bottom of the Printer Mechanism ......3-26 Figure 3-20. Figure 3-21. Removing the Carriage Guide Shaft Ground Plate ............. 3-27 Removing the Carriage Guide Shaft......3-27 Figure 3-22. Removing the Carriage Guide Plate......3-28 Figure 3-23.

  • Page 104: General Repair Information

    Disassembly and Assembly 3 General Repair Information This chapter describes how to disassemble and assemble the printer’s main components. WARNING Always disconnect the AC power cord before you disassemble or assemble the printer. When you disassemble or assemble the printer, wear gloves so that you do not cut your hands on the printer mechanism or the edge of a plate, such as the ground plate.

  • Page 105: Tools

    Disassembly and Assembly Tools Tables 3-1 and 3-2 list tools and measuring instruments you need when you disassemble, assemble, or repair the printer. Table 3-1. Repair Tools LQ-2OO/AP3000...

  • Page 106: Small Parts

    Disassembly Assembly Table 3-2. Measuring Instruments For optimal printer performance, always perform the necessary lubrication, adhesive application, cleaning, and maintenance procedures after you assemble and adjust the printer. (Chapter 4 describes adjustment procedures and Chapter 6 provides maintenance instructions.) Small Parts Table 3-3 lists the abbreviations this manual uses for small parts.
  • Page 107 Disassembly and Assembly Table 3-4 shows the screw shapes and names. Table 3-4. Screw Shapes and Names LQ-200/AP3000...

  • Page 108: Service Checklist

    Disassembly and Assembly Service Checklist Before you deliver the printer, check the table below to ensure that you repaired it properly. The table is designed to help you maintain service quality standards. Table 3-5. LQ-200/AP3000 Service Checklist LQ-2OO/AP3000...

  • Page 109: Removing The Printhead

    Disassembly and Assembly Disassembly and Assembly This chapter describes how to disassemble the printer. To assemble the printer, follow the disassembly steps in reverse. Special assembly notes describe any extra information you need to assemble the printer. Adjustment required notes describe any adjustments that are necessary.

  • Page 110: Removing The Printhead

    Disassembly and Assembly Removing the Printhead Make sure that you have removed the paper and the ribbon cartridge. Then remove the printer cover. Unlock (pull down) the two levers that secure the printhead to the carriage. Then lift up and remove the printhead. Figure 3-1.

  • Page 111: Removing The Upper Case

    Disassembly and Assembly Removing the Case This section describes how to remove the upper case and the control panel. Removing the upper case Remove the printer cover and the paper guide. Remove the pull tractor assembly. Insert a standard screwdriver into each of the two holes at the front of the lower case and push to unlock each notch.
  • Page 112 Disassembly and Assembly While lifting up the upper case, disconnect the control panel’s flexible flat cable (FFC) from connector CN4 on the CO64 MAIN board. Then remove the upper case. Figure 3-3. Removing the Upper Case - 2 LQ-200/AP3000...

  • Page 113: Removing The Control Panel

    Disassembly and Assembly Removing the control panel Remove the upper case as described earlier in this chapter. Turn the upper case upside down and push in the two notches that secure the control panel to the upper case. Then remove the control panel from the upper case.

  • Page 114: Removing The Circuit Boards

    Disassembly and Assembly Removing the Circuit Boards This section describes how to remove the C064 MAIN board, the PEBFIL-II board, and the transformer. Removing the C064 MAIN board Remove the upper case as described earlier in this chapter. Disconnect connectors CN5, CN6, CN7, CN8, CN9, and CN10 on the C064 MAIN board.

  • Page 115: Removing The Pebfil-Ii Board

    Disassembly and Assembly Using a screwdriver, loosen the six bent tabs on the lower case. (These tabs secure the board to the case.) Then remove the CO64 MAIN board. CAUTION When you remove the CO64 MAIN board from the lower case, do not bend the tabs too much.

  • Page 116: Removing The Transformer

    Disassembly and Assembly Removing the transformer Remove the upper case as described earlier in this chapter. Disconnect connector CNl on the PEBFIL-II board. (CNl connects the transformer to the PEBFIL-II board.) Disconnect connector CNlO on the CO64 MAIN board. (CNlO connects the transformer to the CO64 MAIN board.) Remove the CB(0) (M4 8) screw that secures the transformer ground...

  • Page 117: Removing The Printer Mechanism

    Disassembly and Assembly Removing the Printer Mechanism This section describes how to remove the platen unit, the paper guide, and the printer mechanism. You remove the platen unit and the paper guide to facilitate removing the printer mechanism. Figure 3-8. Removing the Printer Mechanism 3-14...

  • Page 118: Removing The Platen Unit And The Paper Guide

    Disassembly and Assembly Removing the platen unit and the paper guide Remove the upper case as described earlier in this chapter. Remove the ground spring hook under the paper feed motor at the right side of the platen unit. Then remove the spring from the platen unit. Turn the shaft holders at the left and right sides of the platen unit as shown in Figure 3-9.
  • Page 119 Disassembly and Assembly Facing the back of the printer mechanism, unlock the two paper guide notches by pushing them toward the front of the printer. Then remove the paper guide. Notches Figure 3-10. Back the Printer Mechanism Assembly Notes Connect the end of the paper end sensor arm to the bottom paper end lever. To install the ground spring, first attach it to the hook at the front and insert it into the platen shaft.

  • Page 120: Removing The Printer Mechanism

    Disassembly and Assembly Figure 3-11. Paper-End Sensor Arm Adjustment Required If any problems (such as non-uniform print density) occur after you install or replace the platen unit, adjust the platen gap as described in Chapter 4. Removing the printer mechanism Remove the platen unit and the paper guide as described in the preceding section.
  • Page 121 Disassembly and Assembly CAUTION When you loosen the tabs, push them gently to avoid damaging the lower case or the printer mechanism. Loosen tabs 1 and 2. Then lift the left side of the frame about a half inch (1 cm) up from the lower case. Loosen tab 3.

  • Page 122: Disassembling The Printer Mechanism

    Disassembly and Assembly Disassembling the Printer Mechanism This section describes how to remove the components from the printer mechanism. When you follow the instructions in this section, see Figure A-7, the exploded diagram of the printer mechanism, and Table A-2, the component list. Removing the paper feed mechanism Remove the printer mechanism as described earlier in this chapter.
  • Page 123 Disassembly and Assembly Push the paper feed roller shaft downward and slide it approximately an inch (2 cm) to the left. Then lift it up and remove it. Figure 3-14. Removing the Paper Feed Roller Shaft LQ-200/AP3000 3-20...
  • Page 124 Disassembly and Assembly Use a screwdriver to loosen the two tabs that secure the paper guide plate and the paper guide spacer to the frame. Push the tabs out from the frame.) Then lift up and remove the paper guide plate and spacer. Figure 3-15.
  • Page 125 Disassembly and Assembly Assembly Note Figure 3-16 shows the direction in which to install the paper guide plate and spacer. Figure 3-16. Installing the Paper Guide Plate and Spacer LQ-200/AP3000 3-22...

  • Page 126: Removing The Paper Feed Motor

    Disassembly and Assembly Removing the paper feed motor Remove the printer mechanism as described earlier in this chapter. Disconnect the motor cable from the paper feed motor. Loosen the tab that secures the paper feed motor to the frame by pushing it in with a screwdriver.

  • Page 127: Removing The Paper End Sensor

    Disassembly and Assembly Removing the paper end sensor Remove the platen unit and the paper guide as described earlier in this chapter. Loosen the tab that secures the paper end sensor to the paper guide. To remove the paper end sensor, rotate it in the direction shown by the arrow in Figure 3-18.
  • Page 128 Disassembly and Assembly Assembly Notes When you assemble the platen unit, see Figure 3-19 to ensure that you install the flat spring and the shaft holder properly and that the gap between the platen and the platen gear is the correct size. When you attach the ground spring to the platen unit, engage the long hook first and then the short hook.

  • Page 129: Removing The Carriage Unit

    Disassembly and Assembly Removing the carriage unit Remove the printer mechanism as described earlier in this chapter. Remove the printhead as described earlier in this chapter. Turn the printer mechanism upside down. Then manually move the carriage unit the cutout in the carriage motor frame. (Move the carriage unit until you see the carriage unit and the timing belt join through the cutout.) Figure 3-20.
  • Page 130 Disassembly and Assembly Lift portion A (in Figure 3-21) of the carriage guide shaft ground plate and remove it frorn the notch in the carriage motor frame. Slide the plate so that you can remove it from the frame through the plate cutout at B. Figure 3-21.
  • Page 131 Disassembly and Assembly Push the notch that secures the carriage guide plate to the frame. Then slide the carriage guide plate to the left and remove it. Figure 3-23. Removing the Carriage Guide Plate Lift up and remove the carriage unit, the carriage guide shaft, and the head adjust lever.
  • Page 132 Disassembly and Assembly Assembly Notes Before you install the carriage guide shaft and the head adjust lever, position them as shown in Figure 3-24. Figure 3-24. Carriage Guide Shaft and Head Adjust Lever The left carriage guide shaft lever is gray and the right one is black. For each lever, slide the hole onto the corresponding shaft end.

  • Page 133: Removing The Carriage Motor .T

    Disassembly and Assembly Removing the carriage motor Follow steps 1 through 5 of the preceding section on removing the carriage unit. Disconnect the motor cable from the carriage motor. Disconnect the home position sensor’s lead wire from the molded clip at the bottom of the frame. (See Figure 3-25.) Loosen the four tabs that secure the carriage motor frame to the chassis frame.
  • Page 134 Disassembly and Assembly Remove the belt tension spring from the carriage motor frame. Remove the 0.092 inch (2.3 mm) E-type retaining ring on the carriage motor. Then remove the plain washer, belt pulley flange, belt pulley shaft holder, belt pulley, and timing belt.

  • Page 135: Removing The Home Position Sensor

    Disassembly and Assembly Removing the home position sensor To remove the carriage motor Came, follow steps 1 through 3 of the preceding section on removing the carriage motor. Push in the notch on the home position sensor and remove the sensor from the carriage motor frame.

  • Page 136: Disassembling The Ribbon Feed Mechanism

    Disassembly and Assembly Disassembling the ribbon feed mechanism the printer mechanism as described earlier in this chapter. Remove Turn the printer mechanism upside down. Without removing the ribbon gear cover, use a screwdriver to loosen the four bent tabs of the ribbon gear cover slightly.

  • Page 137: Disassembling The Tractor Unit

    Disassembly and Assembly Disassembling the tractor unit Use a screwdriver to loosen the three tabs on the sprocket mounting plate. Remove the side covers. (You can remove the left and right side covers at the same time.) Figure 3-29. Removing a Side Cover Push open the two sprocket gear tabs and remove the sprocket shaft from the sprocket gear.
  • Page 138 Disassembly and Assembly Use a screwdriver to loosen the sprocket mounting plate tab. Then pull out the sprocket guide shaft. Figure 3-30. Removing the Sprocket Guide Shaft LQ-200/AP3000 3-35...
  • Page 139 Disassembly and Assembly Pull out the sprocket assembly and paper guide roller from the sprocket shaft and the sprocket guide shaft. The T-shaped notch on the paper guide roller indicates the direction in which to move it along the sprocket shaft. Assembly Note When you assemble the paper guide roller, insert the sprocket shaft from the side with the T-shaped notch.
  • Page 140 Disassembly and Assembly Assembly Notes When you attach the paper guide roller to the sprocket shaft, move the roller in the same direction in which you removed it. (See Figure 3-32.) Place the sprocket wheels on the sprocket shaft so that their markings are on the left.
  • Page 141 Chapter 4 Adjustment Adjustment Overview..............4-1 Adjusting the Platen Gap ..............4-1 Adjusting the Bidirectional Printing Alignment......4-4 VR1 and VR2 Specifications ............4-5 Adjustment Procedures ............. 4-6 Draft mode ................4-7 LQ mode................Figures Removing the Ribbon Mask ........Figure 4-1.

  • Page 142: Adjustment Overview

    Adjustment 4 Adjustment Overview This chapter describes adjustment procedures. To ensure proper operation, you need to adjust the printer after you repair or replace any parts. Adjusting the Platen Gap If you rotated or assembled the carriage guide shaft or shaft levers or if printing is abnormal, you need to adjust the gap between the platen and the printhead.
  • Page 143 Remove the printhead. To remove the ribbon mask, use tweezers to pull it slightly toward the front of the printer and then lift it up. Figure 4-1. Removing the Ribbon Mask Reinstall the printhead. Move the head adjust lever to the second position and move the paper release lever to the tractor position.
  • Page 144 Adjustment Place the gap gauge between the platen and printhead. Using the left and right carriage guide shaft levers, adjust the gap so that the 0.017 inch mm) gauge can pass smoothly while the 0.018 inch (0.45 mm) gauge (0.42 cannot pass at all.

  • Page 145: Adjusting The Bidirectional Printing Alignment

    Adjustment Adjust the platen gap at the 10th and 70th column positions and at the middle of the platen. When the gaps at all three positions match, the adjustment is complete. Figure 4. Platen Gap Adjustment Positions Adjusting the Bidirectional Printing Alignment If lines or characters are misaligned during bidirectional printing, perform this adjustment.

  • Page 146: Vr1 And Vr2 Specifications

    Adjustment VR1 and VR2 Specifications Use variable resistors VR1 or VR2 on the C064 MAIN board to perform the bidirectional printing alignment adjustment. Use VR1 in draft mode and VR2 in LQ mode. Tables 4-1 and 4-2 show the specifications for VR1 and VR2. Misalignment usually occurs when the carriage moves from right to left.

  • Page 147: Adjustment Procedures

    Table 4-2. VR2 Specifications Adjustment Procedures To facilitate adjustment, VR1 and VR2 have standard positions. The standard position is the point at which the variable resistor stops when you turn it counterclockwise. To adjust the alignment, first move VR1 or VR2 to its standard position.

  • Page 148: Draft Mode

    Adjustment Draft mode Turn on the printer while holding down the ON LINE, FORM FEED, and LINE FEED buttons. Press the ON LINE button. Press the LINE FEED button. The printer prints five test patterns. The pattern corresponding to the current value of VR1 is the middle pattern. For example, in Figure 4-5, VR1 equals -4 (pattern 3).

  • Page 149: Lq Mode

    Adjustment Table 4-3. Selecting the Best-Aligned Test Pattern Press the ON LINE button to print the pattern you select. Check the alignment of the printed pattern. If it is not satisfactory, return to step 4. To set VR1 for the best-aligned pattern, turn VRl until the buzzer sounds. Turn off the printer.
  • Page 150 Adjustment Press the FORM FEED button. The printer prints five test patterns. The pattern corresponding to the current value of VR2 is the middle pattern. For example, in Figure 4-6, VR2 equals +4 (pattern 3). Figure 4-6. LQ Mode Test Patterns Select the best-aligned pattern as described here: If the best-aligned pattern is just above the middle pattern, press the FORM FEED button once.

  • Page 151: Procedure For Troubleshooting The Printer

    Chapter 5 Troubleshooting Procedure for Troubleshooting the Printer ........Unit Replacement ................5-1 Repair of the Main Board ..............5-10 Repair of the Printer Mechanism............ 5-17 Figures Troubleshooting Procedure ........5-1 Figure 5-1.

  • Page 152: Troubleshooting 5

    Troubleshooting 5 Procedure for Troubleshooting the Printer Printer problems may produce a variety of symptoms that complicate the task of troubleshooting. However, you can simplify this process by following the procedure outlined in the flowchart below. Figure 5-1. Troubleshooting Procedure Unit Replacement For most problems, it is sufficient for you to determine the difficulty to the unit level.
  • Page 153 Table Symptoms and Reference Pages 5-1. LQ-200/AP3000...
  • Page 154 Troubleshooting The Printer Does Not Operate when the Power Switch is Turned On. LQ-2OO/AP3000...
  • Page 155 Troubleshooting Abnormal Carriage Operation LQ-2OO/AP3000...
  • Page 156 Troubleshooting Normal Carriage Operation but Incorrect Printing (During Self-Test) LQ-2OO/AP3000...
  • Page 157 Troubleshooting Figure 5-2. Printhead Resistance LQ-200/AP3000...
  • Page 158 Abnormal Paper Feed (but Normal Printing) LQ200/AP3000...
  • Page 159 Troubleshooting Abnormal Operation of the Control Panel LQ-200/AP3000...
  • Page 160 Troubleshooting Incorrect Printing in On-line Mode Note: It is assumed that the host computer is operating normally. LQ-2OO/AP3000...

  • Page 161: Repair Of The Main Board

    Repair of the Main Board This section provides instructions for repairing a defective main board. The section describes various symptoms, likely causes, and checkpoints. Checkpoints refer to proper waveforms, resistance values, and other values that should be checked to evaluate the operation of any potentially bad component. Check these values and take the appropriate action.
  • Page 162 Table 5-2. Repair the Main Board (cont.) LQ-2OO/AP3000 5-11...
  • Page 163 Table 5-2. Repair the Main Board (cont.) 5-12 LQ-200/AP3000...
  • Page 164 Table 5-2. Repair the Main Board (cont.) LQ-200/AP3000 5-13...
  • Page 165 Troubleshooting Table 5-2. Repair the Main Board (cont.) LQ-200/P3000 5-14...
  • Page 166 Table 5-2. Repair the Main Board (cont.) LQ-200/AP3000 5-15...
  • Page 167 Troubleshooting Table 5-2. Repair of the Main Board (cont.) 5-16 LQ-2OO/AP3000...

  • Page 168: Repair Of The Printer Mechanism

    Troubleshooting Repair of the Printer Mechanism For detailed procedures for replacing or adjusting parts, refer to Chapter 3, Disassembly and Reassembly, and Chapter 4, Adjustment. If a problem or system recurs after you have attempted to repair the printer, refer to the tables above to find other potential causes.
  • Page 169 Troubleshooting Table 5-3. Repair of the Printer Mechanism (cont.) 5-18 LQ-2OO/AP3000...
  • Page 170 Troubleshooting Table 5-3. Repair of the Printer Mechanism (cont.) 5-19 LQ-2OO/AP3000...

  • Page 171: Preventive Maintenance

    Chapter 6 Maintenance Preventive Maintenance ..............6-1 Lubrication and Adhesive Application..........Figures Correct Adhesive Application ........6-3 Figure 6-1. LQ-200/AP3000 Lubrication Points ......6-4 Figure 6-2. Tables Application of Lubricants and Adhesive....6-2 Table 6-1. Lubrication Points ............ 6-2 Table 6-2.

  • Page 172: Preventive Maintenance

    Figure 6-2. Table 6-2 lists each point along with its recommended lubricant. The three recommended lubricants are Epson O-2, G-20, and G-26, all of which have been tested extensively and found to comply with the needs of this printer. (Table 6-1 provides product details about these lubricants.)
  • Page 173 Maintenance Table 6-1. Application of Lubricants and Adhesive E: Epson-exclusive product Table 6-2. Lubrication Points (Refer to Figure 6-2.) Note: Lubrication must be applied during the reassembly process. LQ-200/AP3000...
  • Page 174 Table 6-3. Adhesive Application Point (Refer to Figure 6-l.) Figure 6-1. Correct Adhesive Application LQ-200/AP3000...
  • Page 175 Maintenance Figure 6-2. LQ-200/AP3000 Lubrication Points LQ-200/AP3000...
  • Page 176 Appendix Connector Summary................ A-1 Circuit Diagrams ................A-3 Circuit Board Component Layout ........... Exploded Diagrams................A-8 Case Outline Drawings..............A-12 Figures Cable Connections ............ A-1 Figure A-1. C064 MAIN Board Circuit Diagram......A-3 Figure A-2. PEBFIL-II Board Circuit Diagram......A-5 Figure A-3.

  • Page 177: Connector Summary

    Appendix Appendix Connector Summary The figure below illustrates the interconnection of the primary components. Table A-l describes the function and size of the connectors. Figure A-l. Cable Connections LQ-2OO/AP3000...
  • Page 178 Appendix Table A-l. Board Connector Summary LQ-200/AP3000...

  • Page 179: Circuit Diagrams

    Circuit Diagrams Figure A-2. C064 MAIN Board Circuit Diagram LQ-200/AP3000...
  • Page 180 Appendix Figure A-3. PEBFILL_II Board Circuit Diagram LQ-2OO/AP3000 A - 5...
  • Page 181 A p p e n d i x Figure A-4. Control Panel Circuit Diagram LQ-200/AP3000 A - 6...

  • Page 184: Exploded Diagrams

    A p p e n d i x Figure A-7. M-5C1O Printer Mechanism Exploded Diagram LQ-200/AP3000 A - 9...
  • Page 186 Table A-2. Part Number Reference Table Note: ESG = Epson standard gray A-11...

  • Page 187: Case Outline Drawings

    Appendix Case Outline Drawings Figure A-9 LQ-200/AP3000 Case Outline Drawing A-12 LQ-2OO/AP3000...

  • Page 188: Case Outline Drawings

    Appendix Figure A-10. LQ-200/AP3000 Case Outline Drawing with Tractor Unit LQ-200/AP3000 A-13...
  • Page 189 Appendix Table A-3. Connector CN3 on the CM4 MAINBoard A-14 LQ-2OO/AP3000...
  • Page 190 Appendix Table A-3. Connector CN3 on the C064 MAIN Board (cont.) Table A-4. Connector CN4 on the C064 MAlN Board LQ-200/AP3000 A-15...
  • Page 191 Appendix Table AS. Connector CN5 on the C064 MAINBoard A-16 LQ-200/AP3000...
  • Page 192 Appendix Table A-6 Connector CN6 on the C064 MAlN Board Table A-7. Connector CN7 on the C064 MAINBoard A-17 LQ-200/AP3000...
  • Page 193 Appendix Table A-7. Connector CN7 on the C064 MAlN Board (cont.) Table A-8. Connector CN8 on the C064 MAINBoard Table A-9 Connector CN9 on the C064 MAIN Board A-18 LQ-2OO/AP3000...

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