Epson LX-300+II RTP Service Manual
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Epson LX-300+II RTP Service Manual

9-pin serial impact dot matrix printer
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SERVICE MANUAL

9-pin Serial Impact Dot Matrix Printer
EPSON LX-300+II
LX-300+II
LX-300+II RTP
LX-1170II
LX-300+II
RTP
LX-1170II
410687104

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Summary of Contents for Epson LX-300+II RTP

  • Page 1: Service Manual

    SERVICE MANUAL 9-pin Serial Impact Dot Matrix Printer EPSON LX-300+II LX-300+II LX-300+II RTP LX-1170II LX-300+II LX-1170II 410687104...
  • Page 2 SEIKO EPSON CORPORATION.  All effort have been made to ensure the accuracy of the contents of this manual. However, should any errors be detected, SEIKO EPSON would greatly appreciate being informed of them.
  • Page 3 REPAIRS ON EPSON PRODUCT SHOULD BE PERFORMED ONLY BY AN EPSON CERTIFIED REPAIR TECHNICIAN. MAKE CERTAIN THAT THE SOURCE VOLTAGES 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: About This Manual

    Provides preventive maintenance procedures and the related to a specific subject, or comment on the results achieved through a previous action. lists of Epson-approved lubricants and adhesives required for servicing the product. Indicates an operating or maintenance procedure, practice APPENDIXProvides the following additional information for reference:...
  • Page 5 Total print volume-> Mean print volume between failure (MVBF)(MTBF 25% duty cycle) • page -35 Reply EEPROM data in the specific address request for LX-300+II is added • page -35 Reply EEPROM data in the specific address request for LX-1170II is added •...

  • Page 6: Table Of Contents

    1.7 Paper Specifications ..................36 1.1 FEATURES ......................9 1.8 Physical Specifications ..................39 1.2 SPECIFICATIONS ..................10 1.8.1 Physical Specifications for LX-300+II ............39 1.2.1 Printing Specification ................10 1.8.2 Physical Specifications for LX-1170II ............40 1.2.2 Paper Feeding .................... 12 1.9 Accessories ......................
  • Page 7 Chapter 4 Disassembly and Assembly Chapter 7 LX-300+II RTP 4.1 Overview ......................66 7.1 DISASSEMBLY AND ASSEMBLY ............... 98 4.1.1 Precautions ....................66 7.1.1 Printhead Unit Removal ................99 4.1.2 Tools ......................66 7.1.2 Upper Housing Unit Removal ..............100 4.1.3 Service Checks After Repair ..............

  • Page 8: Chapter 1 Product Description

    C H A P T E R PRODUCT DESCRIPTION...

  • Page 9: Features

    LX-1170II ESC/P and IBM 2381 Plus emulation  EPSON LX-300+II/300+II RTP/1170II is a 9 pin serial impact dot matrix printer. The main Copy capability: 1 original + 4 copies difference between LX-300+II and LX-1170II is the width: 80 columns for LX-300+II and ...

  • Page 10: Specifications

    Bit image 60, 72, 80, 90 or 120 Draft condensed 120 or 240 Draft emphasized  Control code: LX-300+II ESC/P and IBM 2380 Plus emulation LX-1170II ESC/P and IBM 2381 Plus emulation (Refer to 1.5 “Control codes”) PRODUCT DESCRIPTION SPECIFICATIONS...
  • Page 11 EPSON LX-300+II/300+II RTP/1170II Revision D   Character tables: International character sets: 13 countries U.S.A France Germany U.K.  Standard version (13 character table) Denmark 1 Sweden Italy Spain 1 Italic table PC437 (US, Standard Europe) Japan Norway Denmark 2...

  • Page 12: Paper Feeding

    EPSON LX-300+II/300+II RTP/1170II Revision D  1.2.2 Paper Feeding Character tables and typefaces: Table 1-3. Character Tables and Typefaces  Feeding method: Friction feed (rear) Character table Bitmap font Push tractor feed (rear) Push and Pull tractor feed (rear) Standard...

  • Page 13: Electrical Specification

    EPSON LX-300+II/300+II RTP/1170II Revision D  1.2.3 Electrical Specification Paper thickness lever: The paper thickness lever must be set at the proper position as shown below. Table 1-6. Electrical Specification Table 1-5. Paper Thickness Lever 120V version 230V version LX-300+II...

  • Page 14: Reliability

    Printhead life: Black 400 million strokes / wire UL60950 Safety standards Color 100 million strokes / wire (LX-300+II only) CSA C 22.2 No.60950 120V version FCC part15 subpart B class B 1.2.6 Ribbon Cartridge CAN/CSA-CEI/IEC CISPR22 Class B Safety standards EN60950 Table 1-7.

  • Page 15: Recommended Printable Area

    BM (Bottom Margin) 4.2 mm or more 4.2 mm or more Recommended Printable Area NOTE: The maximum horizontal recommended printable area is 203.2 mm for LX-300+II/ 345.44 for LX-1170II. Figure 1-2. Recommended Printable Area for Cut Sheet PRODUCT DESCRIPTION SPECIFICATIONS...
  • Page 16 EPSON LX-300+II/300+II RTP/1170II Revision D   Envelop Continuous paper Figure 1-3. Recommended Printable Area for Envelop Figure 1-4. Recommended Printable Area for Continuous Paper Table 1-11. Recommended Printable Area for Envelop Table 1-12. Recommended Printable Area for Continuous Paper...
  • Page 17 EPSON LX-300+II/300+II RTP/1170II Revision D  Roll paper Figure 1-5. Recommended Printable Area for Roll Paper Table 1-13. Recommended Printable Area for Roll Paper Continuous Paper PW (Width) Refer to 1.7 “Paper Specifications” PL (Length) Refer to 1.7 “Paper Specifications”...

  • Page 18: Interface Specifications

    EPSON LX-300+II/300+II RTP/1170II Revision D 1.3 Interface Specifications LX-300+II/LX-1170II is provided with bi-directional 8 bit parallel interface and serial interface and USB interface. Optional interface board is not supported on this model. 1.3.1 Parallel Interface (Forward Channel)  Transmission mode: 8 bit parallel IEEE-1284 compatibility mode ...
  • Page 19 EPSON LX-300+II/300+II RTP/1170II Revision D  BUSY signal is active (HIGH level) under the conditions below: Table 1-16. Connector Pin Assignment and Signals (Forward Channel)  In the process of receiving data Signal Return In/Out Functional Description Name GND Pin ...

  • Page 20: Parallel Interface (Reverse Channel)

    EPSON LX-300+II/300+II RTP/1170II Revision D 1.3.2 Parallel Interface (Reverse Channel) Table 1-17. Connector Pin Assignment and Signals (Reverse Channel)  Transmission mode: IEEE-1284 nibble mode Return Signal Name In/Out Functional Description  Adaptable connector: See 1.3.1 “Parallel Interface (Forward Channel)”...

  • Page 21: Serial Interface

    EPSON LX-300+II/300+II RTP/1170II Revision D 1.3.3 Serial Interface  Synchronization: Asynchronous Table 1-18. Connector Pin Assignment and Signals  Signal level: EIA-232D Signal Name In/Out Functional Description MARK (logical 1): -3V to -25V SPACE (logical 0): +3V to +25V Transmit data.

  • Page 22: Usb Interface

    EPSON LX-300+II/300+II RTP/1170II Revision D 1.3.4 USB interface  During hardware initialization  In the self test mode  Standard : based on  In the adjustment mode •Universal Serial Bus Specifications Revision 1.1 •Universal Serial Bus Device Class Definition for Printing Devices Version 1.1 ...

  • Page 23: Interface Selection

    EPSON LX-300+II/300+II RTP/1170II Revision D 1.3.5 Interface Selection 1.3.7 IEEE1284.4 protocol The printer has 3 interfaces; the parallel interface, the serial interface and the USB interface. The packet protocol described by IEEE1284.4 is supported on the parallel I/F and the USB These interfaces are selected manually by Default Setting or selected automatically.

  • Page 24: Operation

    EPSON LX-300+II/300+II RTP/1170II Revision D 1.4 Operation  Operation at power on Turning the printer on while pressing panel switches executes the functions below; 1.4.1 Control Panel Table 1-23. Operation at Power On Switch Function 4 switches and 4 LEDs are on the panel as shown below.
  • Page 25 EPSON LX-300+II/300+II RTP/1170II Revision D 1.4.1.2 Indicators 1.4.1.3 Buzzer   Indication in normal mode Paper out error: Beeper sounds (...)*  Release lever operation error: Beeper sounds (...)* Table 1-25. Indication in normal mode  Fatal error: Beeper sounds (-----)*...

  • Page 26: Functions

    Color printing position Starts the Color printing position adjustment mode. See “Color And pressing it again moves a next page to the TOF position. adjustment * printing position adjustment (LX-300+II Only)” on page -28.  Font Bi-d adjustment Starts the Bi-d adjustment mode. See “Bi-d. Adjustment” on page -28.

  • Page 27: Default Setting

    Auto CR OFF, ON (IBM 2380/2381 Plus) IBM character table Table2, Table1 *1 This setting is effective when IBM 2380 (LX-300+II) or IBM2381 (LX-1170II) Plus emulation is selected. *2 Settings with bold weight mean the standard factory settings. PRODUCT DESCRIPTION Operation...

  • Page 28: Errors

    - Bi-d. adjustment for NLQ mode Turn the printer off. The setting is stored into non-volatile memory. 1.4.2.5 Color printing position adjustment (LX-300+II Only) Color printing position alignment can be adjusted by users. Color printing position adjustment method is as follows.

  • Page 29: Control Codes

    EPSON LX-300+II/300+II RTP/1170II Revision D 1.5 Control codes Table 1-28. ESC/P2 (continued) Classification Operation Command 1.5.1 ESC/P2 Font enhancement Double-Width ESC W, DC4, SO Condensed DC2, SI Table 1-28. ESC/P2 Double-height ESC w Classification Operation Command Double-Strike ESC G, ESC H...

  • Page 30: Ibm 2380/2381 Plus Emulation

    Revision D 1.5.2 IBM 2380/2381 Plus Emulation Table 1-29. IBM 2380/2381 Plus emulation (continued) Classification Operation Command LX-300+II/LX-1170II supports not only ESC/P2 but also the following control code. Print position motion Horizontal Print Position ESC d  LX-300+II: IBM2380 Initialize Tab Position ESC R ...

  • Page 31: Bi-Directional Commands

    EPSON LX-300+II/300+II RTP/1170II Revision D 1.5.3 Bi-Directional Commands <Remote commands> -[Save] column shows whether SV commands are effective to each feature or not.  Reply printer ID : All parameters are saved., Δ : Some limited parameters are saved.,-: No parameter is ...
  • Page 32 EPSON LX-300+II/300+II RTP/1170II Revision D <Remote commands> Table 1-31. Note for Table 1-30 m1 set by AT/CT m2 set by AT m3 set by AT Table 1-34. Bi-Directional Commands Function Code/ Parameter Save All parameters that can be set Set page length “PG”...

  • Page 33: Reply Printer Status

    EPSON LX-300+II/300+II RTP/1170II Revision D 1.5.3.1 Reply Printer Status Table 1-34. Bi-Directional Commands (continued) Function Code/ Parameter Save The printer sends back one of the five strings shown below every few seconds according to the printer status at that time.
  • Page 34 EPSON LX-300+II/300+II RTP/1170II Revision D  1.5.3.2 Packet commands Paper_path Table 1-37. Paper_Path Table 1-39. Packet Commands paper_path “<paper_path code>” Function Code Continuous paper (rear) “0000” Device ID request “di” 01H 00H 01H Continuous paper (bottom) “0001” Device ID reply * “@EJL”...

  • Page 35: Initialization

    EPSON LX-300+II/300+II RTP/1170II Revision D 1.6 Initialization  Power-on initialization The initialization of this level is activated by power-on or cold-reset command (remote RS command). This initialization is;  to initialize the printer mechanism.  to execute Operator initialization. ...

  • Page 36: Paper Specifications

    EPSON LX-300+II/300+II RTP/1170II Revision D 1.7 Paper Specifications  Cut sheet (single sheet, not multi part)  Cut sheet (multi part) Table 1-41. Cut Sheet (Multi part) Table 1-40. Cut Sheet (single sheet, not multi part) Minimum Maximum Manual insertion...
  • Page 37 EPSON LX-300+II/300+II RTP/1170II Revision D   Envelope Continuous paper (Single sheet and Multipart) Table 1-42. Envelope Table 1-43. Continuous Paper (Single sheet and Multi Part) Minimum Maximum Rear Entry Bottom Entry inch Min. Max. Min. Max. Width inch 10 (16)
  • Page 38 EPSON LX-300+II/300+II RTP/1170II Revision D   Labels Roll paper Table 1-44. Continuous Paper with Labels Table 1-45. Roll Paper Rear Entry Bottom Entry Minimum Maximum Min. Max. Min. Max. inch Width Label size See the figure below. inch 10 (16)

  • Page 39: Physical Specifications

    Mass: Approx. 4.6 kg  Mass: Approx. 4.4 kg  Appearance: See the figure below.  Appearance: See the figure below. 390.2 390.2 Figure 1-11. Appearance With CSF (LX-300+II) Figure 1-10. Appearance Without Pull Tractor (LX-300+II) PRODUCT DESCRIPTION Physical Specifications...

  • Page 40: Physical Specifications For Lx-1170Ii

    EPSON LX-300+II/300+II RTP/1170II Revision D 1.8.2 Physical Specifications for LX-1170II  Physical Specifications (CSF)  Physical Specifications (Without pull tractor)  Dimensions: 546 x 440 x 377 mm (WxDxH)  Dimensions: 546 x 275 x 159 mm (WxDxH) Except knob, paper guide & paper supports Except knob, paper guide &...

  • Page 41: Accessories

    EpsonNet 802.11b/g Wireless and  Expendables C82437* 10/100 Base Tx Ext. Print Server Table 1-47. Expendables * These options for LX-300+II and LX-1170II are the same as those for LX-300+ and Description LX-1170, respectively. Enclosed Items LX-300+II LX-1170II Ribbon cartridge (Black )

  • Page 42: Chapter 2 Operating Principles

    C H A P T E R OPERATING PRINCIPLES...

  • Page 43: Overview

    EPSON LX-300+II/300+II RTP/1170II Revision D 2.1 Overview LX-300+II/1170II consists of the printer mechanism and electric circuit boards. Printer Power Supply Mechanism Main Board Board C640/641 C294PSB/PSE MAIN Panel Board C294PNL Figure 2-1. Component Unit  Circuit board Table 2-1. LX-300+II...

  • Page 44: Printer Mechanism

    EPSON LX-300+II/300+II RTP/1170II Revision D 2.2 Printer Mechanism  Ribbon mechanism Color ribbon drive mechanism (option)  The following are main components of the LX-300+II/1170II printer mechanism. Platen gap adjustment mechanism Adjust lever, Platen gap detector  Printhead  Paper feed mechanism ...

  • Page 45: Printhead

    EPSON LX-300+II/300+II RTP/1170II Revision D 2.2.1 Printhead The table below shows the printhead specifications. Table 2-2. Printhead Specifications Item Specification Number of wires Diameter of wire φ0.29 mm See Figure 2-3 "Wire Configuration". Wire configuration Note: The figure is seen from the back of the head facing printing side.

  • Page 46: Carriage Mechanism

    EPSON LX-300+II/300+II RTP/1170II Revision D 2.2.2 Carriage Mechanism The following are the components of the LX-300+II/1170II carriage mechanism and their explanation. (Figure 2-2, "Printer Mechanism Block Diagram")  Carriage: Mounts the printhead.  CR motor: Drives carriage in the printing column direction.
  • Page 47 EPSON LX-300+II/300+II RTP/1170II Revision D Table 2-5. Carriage Speed Mode Current limit (A/phase) Adjacent Carriage CR drive Phase Head drive Carriage speed High or Printing speed frequency drive frequency Printing speed mode at power low speed Front High Normal Rear...

  • Page 48: Ribbon Mechanism

    Switching mode • within HP: open Color ribbon driving is only available for LX-300+II. HP detector detects the signal right after when the CR motor switches the phase. Color ribbon driving mechanism: shifts the color ribbon up and down to change the color area of the ribbon to be used for printing.
  • Page 49 EPSON LX-300+II/300+II RTP/1170II Revision D RIBBON CARTRIDGE DETECTOR Color ribbon drive circuit Ribbon detector detects if the color ribbon is installed or not.  Detect Timing  When the power is applied.  When recovering from the economy mode. Ribbon detector ...

  • Page 50: Platen Gap Adjustment Mechanism

    This mechanism is to adjust the distance between the platen and the printhead (platen gap) according to the paper thickness. Carriage The following are the components of the LX-300+II/1170II platen gap adjustment Parallelism adjust mechanism and their explanation. (Refer to Figure 2-5, "Platen Gap Adjustment...

  • Page 51: Paper Feed Mechanism

    This mechanism consists of the paper feed motor (PF motor), paper feed gears, platen, rear LX-300+II/1170II uses a stepping motor for PF motor. Open loop control switches the paper end detector, bottom paper end detector and push tractor unit. (Refer to Figure 2-2, phases according to the setting period and this mechanism loads and carries paper to the "Printer Mechanism Block Diagram")
  • Page 52 EPSON LX-300+II/300+II RTP/1170II Revision D 2.2.5.1 Page Length Measurement RPE DETECTOR Page length measurement is a process to convert the following value to the number of RPE detector is installed on the paper path at the back of the printer. The table below shows printing lines.

  • Page 53: Release Mechanism

    EPSON LX-300+II/300+II RTP/1170II Revision D 2.2.6 Release Mechanism The table below shows the release detector specifications. Table 2-14. Release Detector Specifications This mechanism switches the flow of PF motor driving force between to the friction feed and to the tractor feed.

  • Page 54: Electrical Circuit Operating Principles

    EPSON LX-300+II/300+II RTP/1170II Revision D 2.3 Electrical Circuit Operating Principles 2.3.1 MAIN Board Electric Circuit NOTE: CS motor is only available for LX-300+II. Figure 2-7. C640/C641 MAIN Board Block Diagram Operating Principles Electrical Circuit Operating Principles...

  • Page 55: C294Psb / C294Pse Board

    2.3.2 C294PSB / C294PSE Board CPU: RISC C33208 CPU, QFP 128 pin LX-300+II/1170II generates power supply by a power supply boards: either C294PSB • Outside clock 19.66 MHz/ (100V) or C294PSE (200V) depending on local supplied voltage. The table below shows Inside clock 39.32 MHz...
  • Page 56 C H A P T E R TROUBLESHOOTING...

  • Page 57: Overview

    EPSON LX-300+II/300+II RTP/1170II Revision D 3.1 Overview Troubleshooting This chapter describes how to troubleshoot problems if any problems occur with the printer. Refer to troubleshooting flowcharts in this chapter to identify a defective part and an appropriate repair for it.

  • Page 58: Troubleshooting

    Revision D 3.2 Troubleshooting 3.2.2 Check Performance By Self-Check Function LX-300+II has self-check function, which supervises the printer condition constantly. If 3.2.1 Initialization Check any problem occurs, it indicates an error occurrence by indicator LED and in some cases it notifies the operator of the error occurrence by beeping the buzzer.

  • Page 59: Identify Problems From Symptoms

    EPSON LX-300+II/300+II RTP/1170II Revision D  3.2.3 Identify Problems From Symptoms Release Lever Error This error will be indicated when wrong release lever operation is performed. For This section describes the procedure for identifying the problems from the abnormal example, if you change the release lever setting when the printer already starts symptoms.
  • Page 60 EPSON LX-300+II/300+II RTP/1170II Revision D Table 3-3. Control Panel LED Does Not Light On. Table 3-5. When Power is Applied, the Printer Becomes Fatal Error. Cause Check Point Solution Cause Check Point Solution Check the electric circuit and Are CR motor, timing...
  • Page 61 EPSON LX-300+II/300+II RTP/1170II Revision D Table 3-6. Self Test Print is Abnormal. Table 3-7. Paper Feed is Abnormal. Cause Check Point Solution Cause Check Point Solution Any of CN3 to CN12 RPE detector or BPE Replace the sensor. Are all connectors Check the sensors.
  • Page 62 EPSON LX-300+II/300+II RTP/1170II Revision D Table 3-9. Printing Operation is Abnormal When it is On-Line. Table 3-10. Electrical Noise is Caused. (Self-Test is Normal.) Cause Check Point Solution Cause Check Point Solution Is there another Check the initial electrical apparatus,...

  • Page 63: Unit And Parts Check

    EPSON LX-300+II/300+II RTP/1170II Revision D 3.2.4 Unit and Parts Check 3.2.4.2 Motor Check This section describes the checking method of the printhead, motors and sensors to find the defective units and parts. By measuring the direct current resistance of the motor coil, you can check if the motor is all right.

  • Page 64: Sensor Check

    EPSON LX-300+II/300+II RTP/1170II Revision D 3.2.4.3 Sensor Check 3.2.4.4 Printhead Driver Check When the sensor is connected mechanically, you can check the sensor by its conductivity. Simple check of the printer driver (Q3 ~ Q11) can be done by the following method.
  • Page 65 C H A P T E R DISASSEMBLY AND ASSEMBLY...

  • Page 66: Chapter 4 Disassembly And Assembly

    4.1.2 Tools The table below lists the tools recommended to use for disassembly and assembly and This chapter explains the disassembly and assembly of LX-300+II/1170II. Read the adjustment. Use only tools specified here. precautions below before disassembling and assembling the printer.
  • Page 67 EPSON LX-300+II/300+II RTP/1170II Revision D Table 4-3. List of Screws Screw Name Screw Name C.B.P., Tite, 3x10 F/ZN C.P., Screw, 3x4 F/ZN C.P.B., Screw, 3x14 F/ZN C.B(O), Screw, 4x8 F/ZN C.B.S., Screw, 3x4 F/Zn Jack Socket C.B.B., (W(13), 3x14 F/ZN...

  • Page 68: Service Checks After Repair

    EPSON LX-300+II/300+II RTP/1170II Revision D 4.1.3 Service Checks After Repair Table 4-4. Check List for Repaired Printer (continued) Category Component Item to Check Check Before returning the printer back to the user, use the check list below to confirm the quality OK NG...

  • Page 69: Disassembly And Assembly

    EPSON LX-300+II/300+II RTP/1170II Revision D 4.2 Disassembly and Assembly This section explains the disassembly and assembly of LX-300+II/LX-1170II. Unless otherwise specified, assembly can be done in the reverse order of the disassembly procedure. Anything that service person should pay attention to is described under “Check Point”. Any adjustment required after assembly is described under “Adjustment”.

  • Page 70: Printhead Unit Removal

    EPSON LX-300+II/300+II RTP/1170II Revision D 4.2.1 Printhead Unit Removal Remove the cover of the printer. Printhead Remove 1 screw (C.P.B., Screw, 3x14 F/ZN; Torque 0.59-0.78N.m) securing the C.P.B., Screw, 3x14 F/ZN printhead to the carriage assembly. Lift the printhead a little bit. Unlatch 2 hooks securing the printhead FFC to carriage unit.

  • Page 71: Upper Housing Unit Removal

    Remove the color upgrade kit if it is installed (LX-300+II only). Set the release lever to the tractor feed. Upper Housing Remove 4 screws for LX-300+II and 6 screws for LX-1170II (CBP, Tite, 3x10 F/Zn, Torque 0.78-0.98) securing the upper housing to the lower housing. .Remove the upper housing.

  • Page 72: Printer Mechanism Removal

    Remove the upper housing. (See 4.2.2 “Upper Housing Unit Removal”.) securing the printer mechanism to the lower housing. LX-300+II: Remove 3 screws (C.B.P., Tite, 3x10 F/ZN;Torque 0.78-0.98 N.M.) See Figure 4-4 below. securing the upper shield plate to the lower housing.

  • Page 73: Panel Board Assembly Removal

    EPSON LX-300+II/300+II RTP/1170II Revision D 4.2.4 Panel Board Assembly Removal Lift the printer mechanism a little bit and remove the harnesses from the main board assembly. Remove the upper housing. (See 4.2.2 “Upper Housing Unit Removal”.) Printer Mechanism Main Board Assembly Disconnect the panel FFC from the connector of the panel board assembly.

  • Page 74: Main Board Assembly Removal

    Figure4-8. C640/641MAIN Board Assembly Removal parallel interface to the lower shield plate. Disconnect the option FFC (LX-300+II only) and panel FFC from CN12 and CN13 on the board. Disconnect the harness connected to the Power Supply Board Assembly from CN8.

  • Page 75: P/S Board Assembly Removal

    C.B.P., Tite, 3x10 F/ZN C.B.P., Tite, 3x10 F/ZN Remove the printer mechanism. (See 4.2.3 “Printer Mechanism Removal”.) LX-300+II: Remove 1 screw(C.B.P., Tite, 3x10 F/ZN;Torque 0.78-0.98 N.M.) and the left grounding plate. LX-1170II: Remove 1 screw (C.B(O), Screw, 4x8, F/ZN; Torque 0.98-1.18 N.M.) and the grounding cable.

  • Page 76: Printer Mechanism Disassembly

    EPSON LX-300+II/300+II RTP/1170II Revision D 4.2.7 Printer Mechanism Disassembly 4.2.7.1 CR Motor Mechanism Removal Remove the printer mechanism. (See 4.2.3 “Printer Mechanism Removal”.) This section explains the disassembling procedure of the printer mechanism. The disassembling procedure is shown in the flowchart below.
  • Page 77 EPSON LX-300+II/300+II RTP/1170II Revision D 4.2.7.2 Platen Mechanism Removal Remove the printer mechanism. (See 4.2.3 “Printer Mechanism Removal”.) Bushing, 11 Remove the platen grounding wire from the platen. Platen Release 1 hook at the rotating hole of the combination gear 17.5, 27 and remove the gear from the right frame.
  • Page 78 EPSON LX-300+II/300+II RTP/1170II Revision D 4.2.7.3 Carriage Mechanism Removal Remove the printer mechanism. (See 4.2.3 “Printer Mechanism Removal”.) PG adjust lever Remove the printhead. (See 4.2.1 “Printhead Unit Removal”.) Remove the timing belt from the carriage installation point. CR guide shaft...
  • Page 79 EPSON LX-300+II/300+II RTP/1170II Revision D 4.2.7.4 Ribbon Feed Mechanism Removal Remove the printer mechanism. (See 4.2.3 “Printer Mechanism Removal”.) Remove the tension spring, 8.10 from the motor bracket and release the tension of the timing belt. (See 4.2.7.1 “CR Motor Mechanism Removal”.) Release 3 hooks securing the RD cover to the left frame.
  • Page 80 EPSON LX-300+II/300+II RTP/1170II Revision D 4.2.7.5 RPE Sensor Removal 4.2.7.6 BPE Sensor Removal Remove the printer mechanism. (See 4.2.3 “Printer Mechanism Removal”.) Remove the printer mechanism. (See 4.2.3 “Printer Mechanism Removal”.) Release the hook of the RPE sensor installed at the paper guide.
  • Page 81 EPSON LX-300+II/300+II RTP/1170II Revision D 4.2.7.8 PG Sensor Removal 4.2.7.9 Release Lever Position Sensor Removal Remove the printer mechanism. (See 4.2.3 “Printer Mechanism Removal”.) Remove the printer mechanism. (See 4.2.3 “Printer Mechanism Removal”.) Release 2 hooks of the PG sensor securing it to the left frame with tweezers and Release 2 hooks of the release lever position sensor securing it to the right frame with remove the sensor.
  • Page 82 EPSON LX-300+II/300+II RTP/1170II Revision D 4.2.7.10 PF Motor Assembly Removal 4.2.7.11 Paper Feed Mechanism Disassembly Remove the printer mechanism. (See 4.2.3 “Printer Mechanism Removal”.) Remove the printer mechanism. (See 4.2.3 “Printer Mechanism Removal”.) Remove the platen grounding wire from the platen.
  • Page 83 EPSON LX-300+II/300+II RTP/1170II Revision D 4.2.7.12 Paper Guide Removal Remove the combination gear, 8.5, 25.2 from the right frame. Remove the printer mechanism. (See 4.2.3 “Printer Mechanism Removal”.) Combination spring, 1.18 Hook at the right frame Remove the platen. (See 4.2.7.2 “Platen Mechanism Removal”.) Plain washer, 5.2 x 0.3 x 10...
  • Page 84 EPSON LX-300+II/300+II RTP/1170II Revision D Release 1 hook at the left frame securing the base frame and remove it by pulling it to the rear. When the paper guide is removed or replaced, perform the platen A D J U S T M E N T...

  • Page 85: Chapter 5 Adjustment

    C H A P T E R ADJUSTMENT...

  • Page 86: Adjustment Tool

    EPSON LX-300+II/300+II RTP/1170II Revision D 5.1.2 Running the Program Adjustment Tool Start up the Adjustment Tool for SIDM, and you will see the following screen. With the Adjustment Tool for SIDM, you can perform:  Get Printer Information  PG Adjustment ...
  • Page 87 EPSON LX-300+II/300+II RTP/1170II Revision D 5.1.2.1 Sequential adjustment mode When you select the Sequential adjustment mode, the following screen will appear. Figure 5-3. Adjustment screen Follow the instruction shown on the screen to perform the adjustment. When you have performed one adjustment, a next adjustment screen will appear. Perform all the necessary adjustments.
  • Page 88 EPSON LX-300+II/300+II RTP/1170II Revision D 5.1.2.2 Particular adjustment mode When you select the Particular adjustment mode, the following screen will appear. Figure 5-4. Particular adjustment mode Select an adjustment or additional function you want to perform, and click the OK button.

  • Page 89: Adjustments

    EPSON LX-300+II/300+II RTP/1170II Revision D 5.2 Adjustments START 5.2.1 Platen Gap Adjustment Perform the platen gap adjustment when you have performed any of the following: Move the carriage unit to the left end.  Removing or replacing the printhead unit (See page 70.) ...

  • Page 90: Bi-D Adjustment

    EPSON LX-300+II/300+II RTP/1170II Revision D 5.2.2 Bi-D Adjustment 5.2.3 Top Margin Adjustment Perform the Bi-D adjustment when you have performed any of the following: Perform the top margin adjustment when you have performed any of the following:   Removing or replacing the printhead unit (See page 70.) Replacing the printer mechanism (See page 72.)

  • Page 91: Bottom Margin Adjustment

    EPSON LX-300+II/300+II RTP/1170II Revision D 5.2.4 Bottom Margin Adjustment Perform the bottom margin adjustment when you have performed any of the following:  Replacing the printer mechanism (See page 72.)  Replacing the main board assembly (See page 74.) ...
  • Page 92 C H A P T E R MAINTENANCE...

  • Page 93: Maintenance

    G-26 1 grain of rice with platen shaft. 6-12 The lubrication points of LX-300+II/LX-1170II are as shown in the following table. Refer Spur gear 34 G-26 10 mm to the table for the type and the amount of oil to be used for each point. Oil and grease have a great affect on the performance of the product, especially on the durability and the NOTE: Lubrication must be applied during the re-assembly process.
  • Page 94 EPSON LX-300+II/300+II RTP/1170II Revision D Lubrication Points Lubricate G-26 on the 3 shafts and 1 boss of the left frame. G-26, 1/2 grain of rice Lubricate G-26 at 3 places on 3 shafts at Lubricate G-26 on the shaft of the RD the right frame.
  • Page 95 EPSON LX-300+II/300+II RTP/1170II Revision D Lubricate G-26 to the shaft of the drive PF roller and the rear driven PF roller. Lubricate G-26 into the hole of the right Drive PF roller (4 places) TR (tractor) frame facing to the TR guide shaft and the left TR frame.
  • Page 96 EPSON LX-300+II/300+II RTP/1170II Revision D Move the carriage around the center, Lubricate G-26 on the installing shaft of then lubricate G-26 on the touching the Combination Gear, 17.5, 27 of the parts of the 2 sides of the frame. right frame.
  • Page 97 C H A P T E R LX-300+II RTP...

  • Page 98: Disassembly And Assembly

    EPSON LX-300+II/300+II RTP/1170II Revision D About LX-300+II RTP, this service manual has only the chapters of the The figure below is the disassembly flowchart for main component. DISASSEMBLY AND ASSEMBLY, ADJUSTMENT, Parts List and Exploded Diagram. START 7.1 DISASSEMBLY AND ASSEMBLY This section explains the disassembly and assembly of LX-300+II.

  • Page 99: Printhead Unit Removal

    EPSON LX-300+II/300+II RTP/1170II Revision D 7.1.1 Printhead Unit Removal Printhead Remove 1 screw (C.P.B., Screw, 3x14 F/ZN; Torque 0.59-0.78N.m) securing the C.P.B., Screw, 3x14 F/ZN printhead to the carriage assembly. Lift the printhead a little bit. Unlatch 2 hooks securing the printhead FFC to carriage unit.

  • Page 100: Upper Housing Unit Removal

    EPSON LX-300+II/300+II RTP/1170II Revision D 7.1.2 Upper Housing Unit Removal Upper Housing C.B.P., Tite, 3x10 F/ZN Release lever Remove the tractor unit. Set the release lever to the tractor feed. Remove 4 screws securing the upper housing to the lower housing.

  • Page 101: Printer Mechanism Removal

    EPSON LX-300+II/300+II RTP/1170II Revision D 7.1.3 Printer Mechanism Removal Lift the printer mechanism a little bit and remove the harnesses from the main board assembly. Remove the upper housing. (See 7.1.2 “Upper Housing Unit Removal”.) Remove 3 screws (C.B.P., Tite, 3x10 F/ZN;Torque 0.78-0.98 N.M.) and 2 screws (C.B.S., Screw, 3x4 F/Zn;Torque 0.78-0.98 N.M.) securing the upper shield plate...

  • Page 102: Panel Board Assembly Removal

    EPSON LX-300+II/300+II RTP/1170II Revision D 7.1.4 Panel Board Assembly Removal Remove the upper housing. (See 7.1.2 “Upper Housing Unit Removal”.) Disconnect the panel FFC from the connector of the panel board assembly. Remove 3 screws (C.B.P., Tite, 3x10 F/ZN; Torque 0.78-0.98 N.M.) securing the panel board assembly to the lower housing.

  • Page 103: Main Board Assembly Removal

    EPSON LX-300+II/300+II RTP/1170II Revision D 7.1.5 Main Board Assembly Removal Serial interface connector Remove the upper housing. (See 7.1.2 “Upper Housing Unit Removal”.) Remove the printer mechanism. (See 7.1.3 “Printer Mechanism Removal”.) Remove 2 Jack Sockets (Torque 0.29-0.49 N.M.) securing the serial interface connector to the lower shield plate.

  • Page 104: P/S Board Assembly Removal

    EPSON LX-300+II/300+II RTP/1170II Revision D 7.1.6 P/S Board Assembly Removal 7.1.7 Printer Mechanism Disassembly Remove the upper housing. (See 7.1.2 “Upper Housing Unit Removal”.) About Printer Mechanism Disassembly for the LQ-300+II RTP, See Chapter 4 “Printer Mechanism Disassembly” on page -76.

  • Page 105: Adjustment

    EPSON LX-300+II/300+II RTP/1170II Revision D 7.2 Adjustment Feed the paper as shown in the figure below. (Be sure the LEDs state is as shown in the figure.) When making the adjustment with the adjustment program, follow the steps below. Hold pressing the two open cover sensors with a clip to set them ON. Refer to the figure.

  • Page 106: Parts List

    EPSON LX-300+II/300+II RTP/1170II Revision D 7.3 Parts List Ref No. Part Name PULLEY ASSY.,DRIVEN Ref No. Part Name HARNESS,HP HOUSING ASSY LOWER PAPER GUIDE HOUSING,UPPER;B DETECTOR,PE,REAR LOGO PLATE;RTP HARNESS,PE,REAR SHEET,PANEL;RTP HOLDER,ROLLER,PF C.B.B-TITE(W(13))SCREW,3X14,F/ZN-3C ROLLER,PF,DRIVEN BOARD ASSY.,MAIN ROLLER,PF,DRIVEN,REAR;C BOARD ASSY., POWER SUPPLY COMPRESSION SPRING,13.72...
  • Page 107 EPSON LX-300+II/300+II RTP/1170II Revision D Ref No. Part Name PAPER GUIDE,SUPPORT GROUNDING PALTE,SHAFT,CR SHEET,CABLE,HEAD GEAR,34 SPUR GEAR,27.5 PLAIN WASHER(B100153012) COMPRESSION SPRING,1.18 COMBINATION GEAR,8.5,25.2 COMBINATION GEAR,17.5,27 GROUNDING WIRE,RIGHT GROUNDING PLATE,PF SHEET,PROTECT,M/B SHEET,CABLE,CR LEVER,RELEASE PRINT HEAD,D3910-1 LABEL,WARNING COVER,BOTTOM,CR TRACTOR ASSY LX-300+II RTP...

  • Page 108: Exploded Diagrams

    EPSON LX-300+II/300+II RTP/1170II Revision D 7.4 Exploded Diagrams Only numbered Service Parts are available. Figure 7-11. LX-300+II RTP Exploded Diagram 1 LX-300+II RTP Exploded Diagrams...
  • Page 109 EPSON LX-300+II/300+II RTP/1170II Revision D Only numbered Service Parts are available. Figure 7-12. LX-300+II RTP Exploded Diagram 2 LX-300+II RTP Exploded Diagrams...
  • Page 110 APPENDIX...

  • Page 111: Connector Summary

    A.1.1 Major Component Unit Connector Function Pins The figure below illustrates how the primary components are connected. Parallel I/F CS motor is only available for LX-300+II. Serial I/F HP Detector Control Board C640/641MAIN PE (Rear) Sensor CR Motor USB I/F...
  • Page 112 EPSON LX-300+II/300+II RTP/1170II Revision D Table A-4. Connector Pin Assignments - CN5 Table A-8. Connector Pin Assignments - CN16 Signal Name Function Signal Name Function RELEASE Release sensor signal Head data 7 Signal ground Head data 1 Head data 5 Table A-5.
  • Page 113 EPSON LX-300+II/300+II RTP/1170II Revision D Table A-12. Connector Pin Assignments - CN13 Table A-10. Connector Pin Assignments - CN11 Signal Name Function Signal Name Function LED1 LED 1 Paper feed motor phase A Switch 1 Paper feed motor phase A...

  • Page 114: Eeprom Address Map

    EPSON LX-300+II/300+II RTP/1170II Revision D A.2 EEPROM Address Map Table A-13. EEPROM Address Map (continued) QPIT Factory Address Explanation Setting Settings Settings This section provides the EEPROM address map. TOF adjustment value -144 to 432 (0.0 mm to 8.5 mm +25.4 mm...
  • Page 115 EPSON LX-300+II/300+II RTP/1170II Revision D Table A-13. EEPROM Address Map (continued) Table A-13. EEPROM Address Map (continued) QPIT Factory QPIT Factory Address Explanation Setting Address Explanation Setting Settings Settings Settings Settings 0: PC 437 21: Code MJK 0: Auto I/F selection 2: Serial I/F...
  • Page 116 EPSON LX-300+II/300+II RTP/1170II Revision D Table A-13. EEPROM Address Map (continued) Table A-13. EEPROM Address Map (continued) QPIT Factory QPIT Factory Address Explanation Setting Address Explanation Setting Settings Settings Settings Settings b0: Font function IBM character table 0:Table2 1:Table1 b1: (reserved)

  • Page 117: Parts List

    EPSON LX-300+II/300+II RTP/1170II Revision D A.3 Parts List Table A-14. LX-300+II Parts List Code Part Name The following tables show parts name of the products. Refer to the exploded diagrams C.B.S-TITE SCREW,3X4,F/ZN-3C for parts’ number. C.B.B-TITE(W(13)) SCREW,3X14,F/ZN-3C  Parts List for LX-300+II C.B.(O) SCREW,4X8,F/ZG-3C...
  • Page 118 EPSON LX-300+II/300+II RTP/1170II Revision D Table A-14. LX-300+II Parts List Table A-14. LX-300+II Parts List Code Part Name Code Part Name GROUNDING WIRE,PLATEN TIMING BELT PULLEY ASSY.,DRIVEN BUSHING,PARALLEL,ADJUST HARNESS,HP CABLE,HEAD C.P.B-TITE SCREW,3X14,F/ZN-3C HARNESS,PG PAPER GUIDE PAPER GUIDE,LOWER DETECTOR,PE,REAR DAMPER HARNESS,PE,REAR...
  • Page 119 EPSON LX-300+II/300+II RTP/1170II Revision D  Table A-14. LX-300+II Parts List Parts List for LX-1170II Table A-15. LX-1170II Parts List Code Part Name Code Part Name C.B.S-TITE SCREW,3X4,F/ZN-3C HOUSING ASSY, LOWER LEVER,RELEASE HOUSING,UPPER PRINTHEAD,D3910-1 SHIELDPLATE,LOWER LABEL,WARNING COVER ASSY.,PRINTER ROLLER,PAPER EJECT;B...
  • Page 120 EPSON LX-300+II/300+II RTP/1170II Revision D Table A-15. LX-1170II Parts List Table A-15. LX-1170II Parts List Code Part Name Code Part Name BOARD ASSY.,POWER SUPPLY PAPER GUIDE HARNESS DETECTOR,PE,REAR POWER CABLE HARNESS,PE,REAR HARNESS DETECTOR,PE,BOTTOM BOARD ASSY.,PANEL HARNESS,PE,BOTTOM SHEET,PANEL;D HOLDER,ROLLER,PF PRINTER MECHANISM(ASP),M-3N60-100 ROLLER,PF,DRIVEN FRAME ASSY.,LEFT...
  • Page 121 EPSON LX-300+II/300+II RTP/1170II Revision D Table A-15. LX-1170II Parts List Table A-15. LX-1170II Parts List Code Part Name Code Part Name PAPER GUIDE,LOWER SPUR GEAR,8 PAPER GUIDE,UPPER LEVER,RELEASE BASE,PAPER EJECT;B SHEET,CABLE,CR COVER,PAPER EJECT;B SPUR GEAR,17 LEAF SPRING,PAPER EJECT E-RING,6,F/UC-3C PAPER SUPPORT PAPER EJECT ASSY.

  • Page 122: Exploded Diagrams

    EPSON LX-300+II/300+II RTP/1170II Revision D A.4 Exploded Diagrams 127(126 for EAI) 119 104 Figure A-2 LX-300+II Exploded Diagram 1 Appendix Exploded Diagrams...
  • Page 123 EPSON LX-300+II/300+II RTP/1170II Revision D 526 527 526 527 Figure A-3. LX-300+II Exploded Diagram 2 Appendix Exploded Diagrams...
  • Page 124 EPSON LX-300+II/300+II RTP/1170II Revision D Figure A-4. LX-1170II Exploded Diagram 1 Appendix Exploded Diagrams...
  • Page 125 EPSON LX-300+II/300+II RTP/1170II Revision D 509 119 568 564 Figure A-5. LX-1170II Exploded Diagram 2 Appendix Exploded Diagrams...

  • Page 126: Electric Circuit Schematics

    EPSON LX-300+II/300+II RTP/1170II Revision D A.5 Electric Circuit Schematics  C640/641MAIN Board  C294PNL  C294PSB  C294PSE Appendix Electric Circuit Schematics...

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