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Epson LQ-860 Technical Manual

Terminal printer
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EPSON TERMINAL PRINTER
L Q - 8 6 0 / 1 0 6 0

TECHNICAL MANUAL

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Summary of Contents for Epson LQ-860

  • Page 1: Technical Manual

    EPSON TERMINAL PRINTER L Q - 8 6 0 / 1 0 6 0 TECHNICAL MANUAL...
  • Page 2 However, should any errors be detected, SEIKO EPSON would greatly appreciate being informed of them. “ The above notwithstanding SEIKO EPSON can assume no responsibility for any errors in this manual or the consequences thereof. @ Copyright 1989 by SEIKO EPSON CORPORATION...
  • Page 3 THE POWER SUPPLY CABLE MUST BE CONNECTED, USE EXTREME CAUTION IN WORKING ON POWER SUPPLY AND OTHER ELECTRONIC COMPONENTS. WARNING REPAIRS ON EPSON PRODUCT SHOULD BE PERFORMED ONLY BY AN EPSON CERTIFIED REPAIR TECHNICIAN. MAKE CERTAIN THAT THE SOURCE VOLTAGE IS THE SAME AS THE RATED VOLTAGE, LISTED ON THE SE:RIAL NUMBER/RATING PLATE.

  • Page 4: Chapter

    Includes a step-by-step guide for product disassembly, Chapter 4 - assembly, and adjustment. Chapter 5 - Provides Epson-approved techniques for troubleshooting. Chapter 6 - Describes preventive maintenance techniques and lists lubricants and adhesives required to service the equipment. ‘ The contents this manual are subject to change without notice.
  • Page 5 REVISION TABLE CHANGE DOCUMENT REVISION DATE ISSUED issue...
  • Page 6 REV.-A TABLE OF CONTENTS C H A P T E R 1 . G E N E R A L D E S C R I P T I O N C H A P T E R 2 . O P E R A T I N G P R I N C I P L E S C H A P T E R 3 .

  • Page 7: Table Of Contents

    REV.-A CHAPTER 1 GENERAL DESCRIPTION FEATURES-=M~.”H..H..-M..M .-.~..H.H”.UM.-.-.~.M.-.-Ho ...-.---.-.Hu.-.M1..1-1 SPECIFICATIONS .fl.-..-~..-.~.~.-..-..-tiuu. ‘iHu.o.u..-ttio.-.--.-.-tio.- .~.-l-3 1.2.1 Hardware Specifications”..............1-3 1.2.2 Firmware Specifications -.-.-ti.m.-.o.tito.-.tim.-.ti .-.~--.~.~-.~’~-..l-9 INTERFACE OVERVIEW ----- C.~..~-..-..M~MU.6fiM-H..fi.- .m-.fi.-fifHM-.HM-.ml-13 1.3.1 8-Bit Parallel interface Specifications - - - - - - - - - - - - - - - - - - - - - - - - - - -...

  • Page 8: List Of Figures

    REV.-A LIST OF FIGURES Figure 1-1. LQ-860/1060 Exterior Views ““””””””””””””””””””””””””””””””””””””” ““”””””””””””””””””””l-1 Figure 1-2. Printheacf Pin Configuration -.--”-”””””””””””””””””””””””””””””””” ““”””””””””””””””””””””l-3 Figure 1-3. Cut Sheet Paper Printable Area ““”””-”””””””””””””””””””””””””””””””” ““”””””””””””””””l-5 Figure 1-4. Fanfold Paper Printable Area .“”.””H””””.”-.”.””””””.”””””o”””””.”. s“”..””.”””.””4”””””1-6 Figure 1-5. Head Adjustment Lever Positioning ““””””””””””””””””””””””””””””””””””””” ““””””””””””l-7 Figure 1-6.

  • Page 9: List Of Tables

    REV.-A LIST OF TABLES Optional Units ..’.., ....... ”... ””..’” ““”””””””””””””””””””””””” ““” ””l-2 Table 1-1. Optional Interface Bc~ards -..-.~..~.~..uH”-..-.uH”-o- ““~-~”~”--”~”~””fll-2 Table 1-2. Line Feed Speeds ................Table 1-3.

  • Page 10: Figure 1-1. Lq-860/1060 Exterior Views

    AUtomatiC paper-loadin9/ejectin9 function Tear-off funCtiOn Printing of fanfold paper without removal of the cut sheet feeder (option) . Low-noise acoustics Optional interface for the EPSON 8100 series cut sheet feeders which contains enveloPe feedin9 . Optional low-priced, single-bin and double-bin capability...

  • Page 11: Table 1-1. Optional Units

    REV.-A r. .+ . - . , . , . . Table 1-1. Optional Units I LQ-860 1 LQ-106O Name – C800071 Pull tractor unit Pull tractor unit C800101 C806141 I Cut sheet feeder (single-bin) C806181 Cut sheet feeder (single-bin) –...

  • Page 12: Specifications .Fl

    REV.-A 1.2 SPECIFICATIONS This section describes the specifications for the printer without the Identity Module option. Specifications not affected by firmware (hardware specifications) are the same whether or not the Identity Module is installed. 1.2.1 Hardware Specifications Serial, impact dot matrix Printing Method See Figure ‘I-2 (12x2 staggered, diameter: 0.2 mm).

  • Page 13: Table 1-4. Cut Sheet Paper Specified Conditions

    REV.-A “ Do not perform reverse feeding for more than 1/6 “. “ Because accuracy of paper feed cannot be assured, do not perform reverse feeding after the paper end has been detected. b) When using pull tractor feed : “...

  • Page 14: Figure 1-3. Cut Sheet Paper Printable Area

    REV.-A Refer to Table 1-5. Continuous paper Table 1-5. Continuous Paper Specified Conditions LQ-860 LQ-I 060 I 101-254 (4.0-10.0”) I 101-408 (4.0-16.0”) I Width [mm] 4 (1 original +3) at normal temperature 3 (1 original +2) at all temperature range Plain paper Quality Total Thickness...
  • Page 15 REV.-A See Figure 1-4. Fanfold (continuous) paper 6)”, 101 - 254 (406) - 10*1(1 Printable area & Printable area AE& 0.35”, 9 mm or more - - - - - — . — - - - - - - - - - - - — — 0.35”, 9 mm or more X’fz...

  • Page 16: Figure 1-5. Head Adjustment Lever Positioning

    REV.-A NOTES : 1. Printing of Iabes is only available at normal temperature. 2. Labels must be fanfold. 3. Labels with pressure-sensitive paper must be jointed by pasting along the dots or lines, and the total thickness must be less than or equal to 0.3 mm (0.0118”) to be printed out under conditions that must be between 5 to 35-C and 10 to 80°/0 4.

  • Page 17: Table 1-9. Electrical Specifications

    REV.-A See Table 1-8 (Details are shown in Figures A-36 and A-39.) Dimensions Weight See Table 1-8. Table 1-8. Dimensions and Weinght Weight [Kg] Depth [mm] Height [mm] Width [mm] LQ-860 LQ-106O I 609 i NOTE : Excluding paper feed knob and sheet guide. Electrical Specifications See Table 1-9.
  • Page 18 REV.-A Reliability 5 million lines (excluding printhead) MCBF (MCBF . . . Mean Cycles Between Failure) MTBF 4000 POFI (duty 25 LQ-860 : 6000 POI-I (duty 25 LQ-106O : (POH ..F)ower On Hours) 200 milion strokes/wire Printhead life Approvals Safety...
  • Page 19 REV.-A Table 1-11. Printing Mode Print Character Printing Speed Printable Columns Conden- Emphas- Double Pitch ized Width Pitch [CPS] [cPI] Draft LQ-860 LQ-1060 225”’ 17.1 Ignored %oporticmal Max. 69 Max. 117 — Min. 272 Min. 160 Max. 34 Max. 59 —...
  • Page 20 REV.-A 1 : 290 CPS at super draft printing (DIP SVV 1-6 is off). t:he NOTES : 1. Max. means the value when maximum width characters are printed. Min. means the value when the minimum width characters are printed. “ —“...
  • Page 21 REV.-A P : . : . , . Character Size See Table I-12. Table 1-12. Character Matrix and Character Size Printing Mode Face Matrix Character Size Unit H. XV. (mm) DRAFT, 10 pitch 9 X 23 1.9x 3.2 1.9x 3.2 DRAFT, 12 pitch 9 X 23 DRAFT, 15 pitch...

  • Page 22: Interface Overview

    REV.-A 1.3 INTERFACE OVERVIEW The LQ-860/1060 has both 8-bit parallel interface and RS-232C serial interface as standard. They can be 2-4 respectively. (This detail of DIP switch settings, refer to Table 1-20.) selected by DIP switches 2-3 and Interface Specifications 1.3.1 8-bit Parallel Data Transmission 8-bit pallarel...

  • Page 23: Table 1-13. 8-Bit Parallel L/F Connector Pin Assignments

    f’;’. Table 1-13. 8-bit Parallel l/F Connector Pin Assignments Description Pin No. Return Signal Strobe pulse to read the input data. Pulse width must STROBE be more than 0.5 ,US. input data is latched after falling edge of this signal. DATA1 Parallel input data to the printer.
  • Page 24 REV.-A As to the wiring for the interface, be sure to use a twisted-pair cable for each signal and never fail to connect the return side. To prevent noise, cables should be shielded and connected to the chassis of the host computer and the printer. Table 1-14.
  • Page 25 REV.-A 1.3.2 RS-232C Serial Interface Specifications Data Transmission Mode RS-232C serial Synchronization Asynchronous Handshaking (By DTR (FIEV) signal or X-ON/OFF Protocol (Refer to Table 1-15 and Figure 1-9.) Table 1-15. Serial Interface Handshaking DTR Signal Description X-ON/OFF protocol MARK When the number of bytes remaining in the input buffer X-OFF (DC3/13H) reaches 256 or less, the signal level goes to MARK, or and X-OFF code is sent to the host computer.

  • Page 26: Figure 1-11. Serial Interface Connector

    REV.-A See Figure 1-10. Data Transmission Timing ‘ T ” ( – VI ( + v] - - - - - - - - - - - - - - - - - - - - y :!S!12131:15-FF::; ( -v) Data Bit P~rlty Start...
  • Page 27 REV.-A Table 1-16. RS-232C Serial l/F Connector Pin Assignments Description Pin No. Dir. Signal Transmit data. Indicates when printer is ready to receive data. “MARK” level indictes printer is not ready to receive data. REV (=2nd RTS) Same as DTR. Receive data.

  • Page 28: Dip Switch Andjumpersettings

    REV.-A AND JUMPER SEITINGS 1.4 DIP SWITCH This section describes DIP switch settings and jumper settings on the JUNMM board. 1.4.1 DIP Switch Settings The DIP switches that users can set are SW”I and SW2. These switches are positioned at the left side of the control panel, and have the functions as :>hown in Tables 1-17 through 1-21, (note that the status of the DIP switches are read only when the printer power on or an INIT signal is input.) Table “I-17.
  • Page 29 REV.-A Table 1-19. DIP Switch 2 Settings ‘g Factory Setting DIP SW. Function 12” 11 “ Page length Valid Invalid 1“ skip-over perforation See Table 1-20. Interface selection Baud rate selecton See Table 1-21. Valid Invalid Auto fear-off mode Valid Invalid Auto LF Table 1-20.

  • Page 30: Jumper Settings

    REV.-A 1.4.2 Jumper Settings Table 1-22 shows the jumper settings. Table 1-22. Jumper Settings ) Location No. / Type 27256 27512 4M/2M-BIT IM-BIT 512K/256K-BIT MASK-ROM (CG1) 4M/2M-BIT 1 M-BIT’ 512K/256K-BIT 256K-BIT MASK-ROM (CG2) SLCT-IN disable SLCT-IN inable SLIN LQ-860 LQ-106O Close Open Open...
  • Page 31 REV.-A 1.5 SELF-TEST OPERATION The LQ-860/1060 printer has the following self-test operation. The control ROM version No. and the DIP switch settings also printout when the self-test is performed. Table 1-23 lists the self-test operating instructions and Figure 1-12 shows the self-test printing. Table 1-23.

  • Page 32: Hexadecimal Dump Function

    REV.-A 1.6 HEXADECIMAL DUMP FUNCTION In hexadecimal dump mode, the printer prints out the data it receives in hexadecimal format. The printer prints a column of 16 hexadecimal values, followed by a column containing the 16 corresponding ASCII characters. If there is no corresponding printable character for a value (e.g., a control code, such as a carriage return or line feed), a period (.) is printed in the ASCII column in the position of the code.

  • Page 33: Printer Initialization

    REV.-A #-:;,, 1.7 PRINTER INITIALIZATION There are two initialization methods: hardware initialization and software initialization. 1.7.1 Hardware Initialization This type of initialization occurs when printer power is turned on or when the printer receives the INIT signal from the host via the 8-bit parallel interface. When printer is initialized in this way, it perfc)rms the following actions : .

  • Page 34: Buzzer Operation And Error Conditions ,Mh

    REV.-A REV.-A BUZZER OPERATION AND ERROR CONDITIONS This section describes the buzzer operation and error conditions of the printer. 1.8.1 Buzzer Opeartion The buzzer ring as follows: When a BEL code is sent to the printer, the buzzer sounds for 0.5 seconds When an error has occured .

  • Page 35: Main Components

    REV.-A 1.9 MAIN COMPONENTS The LQ-860/1060 printer includes the following major subassemblies: . Model-5810/5860 printer machanism “ JUNMM board (main board) . MONPS/MONPSE board (power supply board, 120V and 220/240V versions) “ Control panel (JUNPNL-W board) Figure 1-14 shows the LQ-860/1060 component locations. MONPS/MONPSE Board JUNMM Board Fan Unit...

  • Page 36: Printer Mechanism

    REV.-A 1.9.1 Printer Mechanism This section describes features and paper feed operations of the printer machanism. 1.9.1.1 Printer Mechanism Features The printer mechanism is composed of three stepper motors used in carriage move, paper feed, and color select/ribbon feed, a 24-pin printhead, five sensors (home position, paper end, friction/traCtOr, platen gap, and color position sensors), and metal frames.

  • Page 37: Paper Feed Operations

    REV.-A f!,, 1.9.1.2 Paper Feed Operations Paper Loading and Paper Ejection The paper release lever has a disengage capability for the optional pull tractor unit’s drive mechanism. Therefore, these printers provide some improved paper handling functions that can be performed by using a combination of the paper release lever and LOAD/EJECT switch on the control panel.
  • Page 38 REV.-A 1.9.2 JUNMM Board (Main Board) Figure 1-16 shows the JUNMM board, which contains a 8-bit one chip CPU ~PD78213 (4B) to control the operation of the printer. Driver circuits for the motors, sensors, and printhead are also included on this board. Other main ICS on the JUNMM board are: Gate Array IC “...

  • Page 39: Monps/Monpse Board (Power Supply Circuit Board)

    REV.-A 1.9.3 MONPS/MONPSE Board (Power Supply Circuit Board) The power supply circuit board is located on one of two boards, the MONPS for 120 V AC operation and the MONPSE for 220/240 V operation. The basic construction of the two board is the same: each board contains a power switch, fuses, line filter circuit, and switching regulator circuit.

  • Page 40: Control Panel

    REV.-A 1.9.4 Control Panel [n the control panel, seven switches and seventeen LEDs, as shown in Figure 1-18. The functions of the switches and indicators are given immediately below the illustration. Figure 1-18. Control Panel ON LINE Switch This switch toggles the printer between ON-LINE and OFF-LINE modes. The printer is automatically set to ON-LINE mode and becomes ready at power on.
  • Page 41 REV.-A PITCH Switch Pressing this switch selects the character pitch, and continuing to press the switch for more than 0.5 seconds select the next character pitch, seq~lencially. The PITCH indicator lights beside the currently selected character pitch to confirm its status. NOTE : Settings by FONT and PITCH switches are stored as defaults.

  • Page 42: Operating Principles

    REV.-A CHAPTER 2 OPERATING PRINCIPLES 2.1 GENERAL ....................2.1.1 Connector Descriptions .
  • Page 43 REV.-A 2.3.3.2 Switch Status Read Section ..........2-43 2.3.4 State Detection and Sensor Signal Input Circuits .
  • Page 44 REV.-A LIST OF FIGURES Printer Mechanism Block Diagram ........... . Figure 2-1.
  • Page 45 REV.-A Handshaking with DTR Signal ............Figure 2-33.
  • Page 46 REV.-A LIST OF TABLES Printhead Specifications ..............Table 2-1.
  • Page 47 REV.-A Relationship Paper Release Lever Position and P35 Voltage”””””””””””””-”2 -54 Table 2-33. Relationship Printhead Coil Drive Cycle and Print Mode o“””oo””o”s”oo”*”.0”02-56 Table 2-34. Relationship E05A24CiA Terminal States and CR Motor Coil Current* ””~2-59 Table 2-35. Table 2-36. Relationship CR Motor Speed and Phase Switching System ”””””””””* *””. ””2-64 Various PF Motor Control Relationships .
  • Page 48 REV.-A 2.1 GENERAL This chapter will describe features and of the Model-5810/5860 Printer mechanism! MONpS/ operations MONPSE power circuit board, JUNMM control circuit board, and control panel. In this section, the following abbreviations ate used : CR : Carriage CS: Color select F/T: Friction/tractor HP: Home position PE : Paper end...
  • Page 49 REV.-A f’ 2.1.2 Printer Mechanism Operations The Model-5810/5860 is a serial printer mechanism equipped with a 24-pin impact dot printhead. This mechanism has various new features to reduce manual paper handling. A block diagram is shown in Figure 2-1. Printing Mechanism ei”...

  • Page 50: Printing Mechanism

    REV.-A 2.1.2.1 Printing Mechanism Figure 2-2 shows the printing mechanism and Table 2-1 lists the printhead specifications. The printhead has 24 wires arranged in twcl staggered lines (12 wires for each line). These wires are connected to their own wire drive coils. The basic printing operations are as follows: The drive signal is sent from the control circuit to the printhead drive circuit and converted to the printhead drive voltage (+35 V DC), which causes current to flow through the assigned head driving coil...
  • Page 51 REV.-A Table 2-1. Printhead Specifications Item Description Remarks Refer to Section 1.2. 1. Type Impact dot Pin Diameter 0.2mm Pin Configuration 12 line x 2 COI. 1 /180” Dot Pitch * 1 00/0 Drive Voltage 35 VDC 25°C, Coil Resistance 29 ohmst2 ohms for one coil Normal mode...
  • Page 52 REV.-A The printhead is equipped with a thermistor as an element which continuously monitors the printhead temperature to prevent the head driving coil in the printhead from being burnt or deteriorated when the printhead temperature rises abnormally due to continuous printing. The printhead temperature monitored by the thermistor is converted into a voltage signal, and is fed back to the control circuit.

  • Page 53: Carriage Movement Mechanism

    REV.-A 2.1.2.2 Carriage Movement Mechanism Figure 2-4 shows the carriage movement mechanism and Table 2-3 lists its specifications. The printhead is mounted on the carriage, and the entire unit is supported by the two carriage guide shafts. The carriage is fixed to the timing belt on one side and is moved when the CR motor drives the timing belt. Printing is accomplished by the combination of printhead and carriage mechanism operations.
  • Page 54 REV.-A Table 2-3. Carriage Movement Mechanism Specifications Refer to Table 2-5. (MIN.) Refer to Table 2-4. Table 2-4. CR Motor Specifications Description Remarks Item Type I Four-phase 200-pole HB type I I 25”C, for one coil C o i l Rsisitance I 2.8ohms +70/0 2-2 phase excitation Driving Frequency 3600 PPS...

  • Page 55: Ribbon Feed Mechanism

    REV.-A 2.1.2.3 Ribbon Feed/Color Select Mechanism The mechanism consists of a ribbon feed mechanism which feeds up the ink ribbon of the ribbon cartridge and the color select mechanism which switches colors of the color ink ribbon. Switching between the CS/RF motor.
  • Page 56 REV.-A , Ribbon Breaking Spring Inked Ribbon – Cartridge Ribbon Feed Roller ‘ Ribbon PressureRoller & Planetary Ribbon Drive Gear Motor Ribbon Feed Transmission Gear Figure 2-5I. Ribbon Feed Mechanism The ribbon feed mechanism is mounted on the carriage. As the CS/RF motor rotates counterclockwise (C. C.W.), the ribbon drive pulley rotates to feed the ribbon (Refer to see Table 2-8).

  • Page 57: Color Select Mechanism

    REV.-A Color Select Mechanism If the color ribbon cartridge is mounted on the carriage, the color select mechanism operates to allow seven-color printing. Table 2-9 shows the specifications of the color ribbon select mechanism. Table 2-9. Coler Select Mechanism Specifications Ribbon Shift Color Motor...
  • Page 58 REV.-A 1. Outline The color-inked ribbon is divided into four strips as shown in Figure 2-6. One strip can be selected by vertically moving the color ribbon cartridge using point @ of the carriage as a fulcrum. Color Ribbon Cartridge —...
  • Page 59 REV.-A Color Ribbon Cartridge Carriage Black Ribbon Cartridge E%ck — Cyan ~a9enta yellow b) When a black ribbon is used When a color ribbon is used Ribbon Feed Transmi . , , . , .. + ..,, . Ribbon Feed Planetary ever Ribbon Feed Transmission Gear...
  • Page 60 REV.-A 2.1.2.4 Paper Feed Mechanism The PF motor drives the platen and tractor via the paper feed transmission gear, and feeds the paper. If the paper runs out, the PE sensor detects it. The kind of the paper being used (cut sheet or fan-fold paper) is detected by the F/T sensor (interlocked with the paper release lever).
  • Page 61 REV.-A Push tractor feeding and friction feeding are ciescribed below. The paper feeding methods consist of push feeding (for continuous paper) and friction feeding (for tri~ctor cut sheet paper). Refer to Table 2-17. Table 2-17. Paper Feeding Method Paper Release Front Rear Center...

  • Page 62: Friction Feeding

    REV.-A Friction Feeding Figure 2-8 shows the friction feed system paper feed mechanism. Insert the paper from the paper entrance with, the paper release lever being turned backwards. The paper is pushed to the platen by the paper feed roller, and is pulled into the printer due to friction generated between the paper and the platen.

  • Page 63: Push Tractor Feeding

    REV.-A Push Tractor Feeding Figure 2-9 shows the push tractor feed system paper feed mechanism. This mechanism feeds paper when the PF rector is driven with the paper release lever being turned center and the fan-fold paper being set at the tractor unit. Paper Release Lever (center) Tractor Transmission Gear r % ’...
  • Page 64 REV.-A 2.2 POWER SUPPLY CIRCUIT OPERATION (MONPS/MONPSE board) The DC voltages required to operate the mechanisms and control circuits are supplied from the supply board in this unit. There are two kinds of power supply boards, the MONPS board for 100 V or 120 V operation and the MONPSE board for 220 V or 240 V operation.
  • Page 65 REV.-A ~“!>., Figure 2-10 shows a block diagram of the power supPlY circuit. External noise on the AC line is first Y ,.. attenuated by the input filter circuit. Then the AC voltage is converted to DC by the full-wave rectifier, and is smoothed by the smoothing circuit.

  • Page 66: Input Filter Circuit

    REV.-A 2.2.2 Input Filter Circuit Figure 2-11 shows the input filter circuit. The filter circuit attenuates external noise and inhibits noise generated in the printer from going out over t:he AC line. The coils and capacitors employed in this filter are able to handle ‘fluctuations of the AC input line.

  • Page 67: Main Switching Circuit

    REV.-A 2.2.4 Main Switching Circuit This circuit uses a ringing choke converter (RCC) AC input switching power circuit. This system has the merits of using fewer parts and a smaller trarlsformer, and is often used when a smaller power supply is required.
  • Page 68 REV.-A co’ %1-- Figure 2!-14. Main Switching 2-21...
  • Page 69 REV.-A f?” -.. l(A), Icof Q1 — - . —._— k=i’L Icof Q1 I__._z E-== I t on I t off I =ton +t.aff) I Figure 2-16. RCC System Switching Operation Figure 2-15. Waveforms at Primary and Secondary Sides of T1 ““’”...
  • Page 70 REV.-A 2.2.5 +35 V Voltage Regurator Circuit The back electromotive described in Section 2.2.4.1 causes diode D20 on the secondary side of transformer TI to conduct, which supplies power. Consequently, the amount of energy stored by the transformer during a unit period of time becomes equal to the power output. That is: ”L1”(*”ton)2”f=v””t”...
  • Page 71 REV.-A 2.2.6 Over Voltage Protection Circuit As described in 2.2.5, the power supply circuit of this unit not only uses the voltage regulator circuit to stabilize the output voltage (VO) and provide feedback to the switching circuit, but it also contains an over voltage protection circuit to protect against malfunctions of the voltage regulator circuit.

  • Page 72: Voltage Regulator Circuit

    REV.-A 2.2.7 +5 V Switching Regulator Circuit Figure 2-19 shows the +5 VDC switching regulator. This circuit employs a hybrid type switching regulator IC STR20005 (IC20) which consists of a voltage regulator circuit along with coil L20 and capacitor C25 at the external output section.

  • Page 73: Soft Start Timing

    REV.-A IV) , E! % ‘ :;; “ ‘ : +of CMP ‘of CMP ~ ’ I 3 3JI s ; Collecfor of Trl t— Figure 2-20. CMP input and Output Voltage Comparison 2.2.7.3 Soft Start When power is supplied capacitor Cl, connected between the CMP negative side and GND, increases the Tri output at time constant R3 on-time of Trl gradually becomes longer (Refer to Figure so that...
  • Page 74 REV.-A 2.2.8 ~12 V Half-Wave Rectifier-Smoothing Circuit The power from this circuit is mainly supplied to the RS-232C Interface on the optional interface board. Both the +12 V and –12 V lines have their own half-wave rectifier circuits. The smoothing circuits cosist of capacitors C23 and C24, and include dummy resistors R27 and R28 which control the rise of voltage when the +12 V lines have no load, as well as current limiting resistors R25 and R26.
  • Page 75 REV.-A 2.3 CONTROL CIRCUIT BOARD (JUNMM Board) Figure 2-23 shows a block diagram of the JUNMM board. The printer employs 8-bit one-chip CPU .cPD78213 of which functions and performance are better than those of conventional 8-bit one-chip CPU ,uPD781O, to control all of the printer operaticm. The printer is driven with a 9.83 MHz clock. Moreover, various gate array ICS and hybrid ICS are employed to lighten load to the CPU, so that the CPU circuit can be simplified and data can be processed at high speed.

  • Page 76: Figure

    REV.-A 2.3.1 Reset Circuit Figure 2-24 shows the reset circuit. After being input to the E05AIOAA gate array (MMU :8B), the reset signal resets the gate array, then is sent out to the other devices. Reset operation (hardware reset) is performed when: The printer power is turned on or off.
  • Page 77 REV.-A 2.3.1.2 Power ON/OFF Reset Figure 2-24 shows the reset circuit and Figure 2-26 shows the waveform the this operation. When the power is switched on and Vx rises, voltage is applied to the integration circuit (composed of R47, C23, D32). The voltage at C23 increases and when reaches VTHLD the output switches from low to high...
  • Page 78 REV.-A 2.3.1.3 Font/Identity Module Installation and Removal Reset Figure 2-24 shows the reset circuit and Figure 2-27 shows the module installed/removed reset timin9. The font and identity modules should not be installed or removed while the power is on. If this is done, the ROUT signal must be set low to prevent a JIJNMM board circuit malfunction.
  • Page 79 REV.-A Table 2-20. State of Module %!!W ‘“’stay *’L.H.-.d =“O’s’”’ H 4“” %. *..,. 2-32...
  • Page 80 REV.-A 2.3.1.4 ST-RAM (7A) Battery Backup Circuil The ST-RAM (7A) employs a lithium battery (3.00 to 3.35 VDC) for backup, and is used to maintain the initial data for the printer mechanism and settings for the control panel when the printer power is turned off. Figure 2-28 shows the ST-RAM (7A) battery backup circuit, and Table 2-21 shows the ST-RAM conditions when the power is turned on or off.
  • Page 81 REV.-A #..l ,%:.. 2.3.2 Interface This printer has both an 8-bit parallel interface and an RS-232C serial interface. 2.3.2.1 8-Bit Parallel Interface Operating Principles Figure 2-29 shows the 8-bit parallel interface data transmission timing. Data is transferred between a host computer and the printer using the following sequence: fl[a) BUSY...

  • Page 82: 8-Bit Parellel Interface Circuit

    REV.-A 8-bit Parallel Inteface Circuit Figure 2-30 shows the 8-bit parallel interface circuit. Address mapping. for the E05A24GA (llB) is performed by the CPU via the MMU (8B). The gate array IC E05A24GA (llB) is employed to simplify the control required from the CPU. Refer to Appendix A.1.1.7 for the details of the E05A24GA.
  • Page 83 f-.,,. default values on DC1 is sent. GI’A (llB). Set initial values on STROBE is sent. control terminals. f--=--n — &bit data is latched and is sent. BUSY IBF goes low and CPU recognize the data is input. — .-- q>,. C P U read the data.
  • Page 84 REV.-A . INIT goes low. ITO goes low and CPU (4B) recognizes host computer sends INIT signal. CPU performs initialize oper -ation. (Refer to section 1.7.) CPU write the data G/A (llB) to change ~ from high. IOW to Figure 2-32. INIT Signal Proseccing Table 2-22.
  • Page 85 REV.-A 2.3.2.2 RC-232C Serial Interface Operating Principles The two handshaking methods are as follows : flag . . . DTR (REV) signal Status The DTR signal is set to SPACE (+V) when the printer can accept data and is set to MARK (–V) when the printer is in an error state or when the empty area in the input buffer reaches 256 bytes or less.
  • Page 86 REV.-A Description Circuit Figure 2-35 shows the RS-232C serial interface circuit. Data transmitted from the host computer is converted from EIA (+3 to +27 V, –3 to –27’ V) to TTL O V, +5 V voltage levels by the RS-232C line driver 75189 (1OA).
  • Page 87 f ’ : ! Serial data are sent on RXD. line data buffer vacant area reach 256 byte or .BUSY’”H” (DTR=MARK). -Send X-OFF (13H). line data buffer vacant Figure 2-36. RS-232C Serial Interface Circuit Operation OPERATION INITIALIZE From BUSY ‘-+~ k’st~::-+;DA X-OFF ----:...

  • Page 88: Control Panel Interface Circuit

    REV.-A 2.3.3 Control Panel Interface Circuit Figure 2-38 shows the control panel interface circuit. This circuit is mainly divided into the following two blocks: . LED drive section Switch status read section Descriptions of the above sections will now be given. Refer to Figure A-33 for the detailed circ:uits on the JUNPNL board.
  • Page 89 c . , , \ ,- . , , REV.-A 2.3.3.1 LED Drive Section Each LED is controlled and driven by port expander driver IC MSM58371, which includes a 12-bit shift register and LED drivers. Figure 2-39 shows the data transfer timing fc,r the MSM58371, and Figure 2-40 shows a block diagram of the MSM58371.
  • Page 90 REV.-A 2.3.3.2 Switch Status Read Section The state of each switch is read periodically by the CPU through five ports (P67, P26, P27, P74, and P75). When the state of a switch is found to be different from the previous value, the new value is transferred to the LED drive section as data to rewrite the switch status.
  • Page 91 REV.-A 2.3.4 State Detection and Sensor Signal Input Circuits This section describes the state detection circuits on the JUNMM board and sensor signal input circuits. Table 2-24 lists the state detection circuits on the JUNMM board. Table 2-25 lists the sensors connected to the JUNMM board.

  • Page 92: Reference Voltage Supply Circuit

    REV.-A 2.3.4.1 Reference Voltage Supply Circuit Figure 2-41 shows the circuit that supplies reference voltage AVREF (4.75 VDC) to the A/D conve~er in the CPU. In this circuit, programmable shunt a regulator TL431 (5B) is used to output the reference voltage. AVREF 51 Vr~f C16 +...

  • Page 93: Line Voltage Detection Circuit

    REV.-A 2.3.4.2 35 V Line Voltage Detection Circuit As shown in Figure 2-42, this circuit detects t:he voltage on the 35 V line. The detected voltage is divided by R51 and R52, and the voltage at point (~ is input to the AN1 terminal of the CPU. AVSS Figure 2-42.
  • Page 94 REV.-A 2.3.4.3 VR11VR2 Reading Circuit Figure 2-44 shows the VR1/VR2 reading circuit. The values (voltages) set by VRI and VR2 are used to control the corrections for bidirectional printing in the Draft and LQ modes. VR1 is used for bidirectional printing in the LCI mode, and VR2 is used for bidirectional printing in the Draft mode.
  • Page 95 REV.-A 2.3.4.4 Printhead Temperature Detection Circuit Figure 2-45 shows the printhead temperature detection circuit. This circuit detects the temperature using a thermistor in the printhead. Vret PRINTHEAD THERMISTOR c8 ; , ;: CPU (4B) AVSS ,..Figure 2-45. Printhead Temperature Detection Circuit The temperature of the printhead rises as the solenoids in the printhead continue to be driven.
  • Page 96 REV.-A Table 2-28 shows the relationship between the upper/lower limit values for printhead temperature, and the voltage at the ANO terminal of the CPU. Table 2-28. Relationship Printhead Temperature and ANO Voltage =’npe’~[oc] ‘NOTermi:~:tige[v] 2-49...

  • Page 97: Cr Hp Sensor Circuit

    REV.-A 2.3.4.5 CR HP Sensor Circuit Figure 2-47 shows the CR HP sensor circuit, This circuit determines the home position of the carriage. CARRIAGE FLAG CN1O r ---- ~ - - - — - ~ ---- - ~ ; IY’ (4B) 2 ’...

  • Page 98: Cs Sensor Circuit

    REV.-A 2.3.4.6 CS Sensor Circuit Figure 2-46 shows the CS sensor circuit. When the color printing is executed, the circuit detects the color home position (black) and each color ribbon section (cyan, magenta, and yellow) of the color ribbon. CS DRIVE CAM FLAG (4B) Figure 2-48.
  • Page 99 REV.-A 2.3.4.7 PG Sensor Circuit The circuit detects the position (platen gap) of the head Figure 2-49 shows the PG sensor circuit. adjustment lever of the printer mechanism, and selects either normal or mode at printing. COPY F’G ““sO’ L_L, -.
  • Page 100 REV.-A 2.3.4.8 PE Sensor Circuit Figure 2-50 shows the PE sensor circuit. This circuit determines whether paper exists in the printer or not. CN1l ~ P21 :4:: Figure 2-50. PE Sensor Circuit Table 2-32 shows the relationship between the paper state and the voltage at the P21 terminal of the CPU.
  • Page 101 REV.-A 2.3.4.9 FIT Sensor Circuit The circuit detects the paPer release lever position (paper feed Figure 2-51 shows the F/T sensor circuit. system) of the printer mechanism. CN15 59 ~35 CPU (4B) FIT’ Figure 2-51. F/T Sensor Circuit Table 2-33 shows the relationship between the paper release lever position and signals at the CPU port P35.

  • Page 102: Pg Sensor Circuit

    REV.-A 2.3.5 Printhead Control and Drive Circuit Figure 2-52 shows the printhead control/driv~? circuit block diagram. The CPU (4B) transmits print data for one line in three steps (8-bit data x 3 =24 dots) and stores the data in control gate array E05A02LA (2A), then CP[J outputs the printhead trigger pulse (HPW) to the E05A02LA. When the HPW signal is low, the drive transisi:ors which drive the printhead coils are activated, and printing is executed.
  • Page 103 REV. -A #-,!, 2.3.5.1 Relationship Between Paper Thickness and Print Mode * . , The CPU detects a platen gap value (head adjustment lever position : Ist to 3rd position/4th to 8th position) via the F/T sensor. With this value, the CPU controls the printhead drive cycle and drive pulse so that will be appropriate.

  • Page 104: Printhead Drive Pulse Timing

    REV.-A Pulse Width and +35 V Line Voltage 2.3.5.2 Relationship Between Printhead Drive As described in Section 2.3.5.1, this printer has two kinds of printhead drive pulse widths depending on the head adjustment lever position. Figure 2-53 shows the relationship between the printhead drive pulse width and +35 V line voltage.
  • Page 105 REV.-A g:.:,, 2.3.6 CR Motor Control and Drive Circuit Figure 2-55 shows the CR motor controlldrive circuit block diagram. The CR motor is controlled by the CPU (46). Phase switching signals are output from the CPU ports (POO to P03) which have the real time output function. The phase switching signal output from the CF)U is sent to the constant current drive IC (1A).
  • Page 106 REV.-A 2.3.6.1 Reference Voltage Generation Circ!uit Figure 2-56 shows the reference voltage generation circuit and Table 2-35 shows the relationship between each terminal state of the gate array E05A24GA (IIB) and CR motor coil current. This circuit changes the voltage applied to ‘the RX terminal of the CR motor driver IC S1730(5A (1A) using the combination of R5, R6, R7, and R8 so thi~t the current limiting value for the current flowing to a coil of the CR motor varies.

  • Page 107: Figure

    REV.-A Motor Drive 2.3.6.2 CR Circuit Figure 2-57 shows the CR motor drive circuit. Figure 2-58 shows the CR motor drive circuit signal timing. This circuit employs unipolar stepper motor driver IC S17300A (1A), and drives the CR motor using constant current chopper type control.
  • Page 108 REV.-A (4B : Pin 62) 5 V/DIV. OA (1A: Pin 5) 50 V/DIV. RSA (1A: Pin 3) 1 V/DIV. 0.5 ms/DIV. NOTE: In the Draft, normal self test mode: Figure 2-58. CR Motor Drive Circuit Signal Timing 2-61...
  • Page 109 REV.-A The blocks are as follows. Phase Drivers (A to D) These drivers are turned on and off upon receiving the drive pulses POO to P03 from the CPU (4B) via inverter (l B). When the drive pulse is LOW, the corresponding phase driver turns on. and CMP2 CMPl CMP1 or CMP2 compares the reference voltage at the minus terminal with the voltage applied to the plus...
  • Page 110 REV.-A 2.3.6.3 CR Motor Control CR Motor Phase Switching System (POO The CR motor is a 4-phase stepper motor, and each phase is controlled by the corresponding terminal to P03) of the CPU (4B) via the inverter (16). Two phase switching systems are used; 2-2 phase switching and 1-2 phase switching.
  • Page 111 REV. .:-’. Table 2-36. Relationship CR Motor Speed and Phase Switching System Driving State Holding Speed No. Phase Switching System Carriage Speed [PPS] 2700 1800 1350 3600 — [~s/step] Cycle 1111 1667 Constant Speed, CR Motor 0.15 Deceleration Coil Current [A/COiIl I A c c e l e r a t i o n NOTE : The carriage speed ar...

  • Page 112: Carriage Motion Area

    REV.-A Carriage Motion Area and Speed Control The carriage motion area is shown in Figure 2-60. This is mainly divided into three areas: 1) acceleration area, 2) printable area, and 3) deceleration area. The printer has six carriage speeds (Refer to Table 2-36.). Deceleration area Printable area Acceleration area...
  • Page 113 REV.-A Speed O — — Speed 1 — Speed 2 Speed 3 ———— Speed 4 — — %eed 5 1 High Spaed High Speed Skip ntable Printable 4rea - .1- min. 8CH Hiah Soeed Skip Control Range Non-printable Area min. 9CH .,..
  • Page 114 REV.-A 2.3.7 PF Motor Control and Drive Circuit The PF motor is driven only by the 2-2 phase switching system, and the minimum paper feeding amount is 1/360 inch. Table 2-37 shows the various PF motor control relationships. Table 2-37. Various PF Motor Control Relationships Acceleration/ PF Motor Coil Paper Feeding...

  • Page 115: Figure

    REV.-A 2.3.7.1 PF Motor Drive Circuit .’. . The PF motor is driven using only 2-2 phase switching and regulated +35 VDC. Figure 2-62 shows the PF motor drive circuit and Figure 2-63 shows the pulse timing. Table 2-40 lists the relationships between various PF motor control factors.

  • Page 116: Pf Motor Phase Switching Timing

    REV.-A 2.3.7.2 PF Motor Phase Switching Timing The PF motor is a 4-phase stepper motor, and the phases are controlled by E05A24GA (11 B) terminals P20 to P23. 2-2 phase switching is used for this motor. Figure 2-64 shows the PF motor phase switching timing. :;...
  • Page 117 REV.-A .@ ,., 2.3.8 CS/RF Motor Control and Drive Circuit $’ The CS/RF motor is directly controlled by the CPU (4B), and is driven by a constant voltage. The CS/RF motor has two functions (color select and ribbon feed). Switching between the two functions is performed in accordance with the rotational direction (forward (C.
  • Page 118 REV.-A 2.3.8.1 CS/RF Motor Drive Circuit ,The CS/RF motor is driven using 2-2 and 1-2 phases switching and regulated +35 VDC. Figure 2-65 shows the CS/RF motor drive circuit and Figure 2-66 shows the pulse timing. Table 2-43 lists the relationships between various CS/RF motor control factors. CPU (4B) Figure 2-65.
  • Page 119 REV.-A .= , . , < 2.3.8.2 CS/RF Motor Phase Switching Timing The CS/RF motor is a 4-phase stepper motor, and the phases are controlled by CPU (4B) terminals P04 to P07. 2-2 and 1-2 phase stitchings are used for this motor. Figure 2-67 shows the CS/RF motor phase switching timing.
  • Page 120 REV.-A CHAPTER 3 OPTIONAL EQUIPMENTS 3.1 GENERAL ~””c--””-.’u”u~””u”- ““uu”M””.-M”H’”u~”u”cH”MH”-” .HSMH”-..--U”3”--”3-1 3.2 OPTIONAL INTERFACES-”.-”- ““Hu”.H””-u””-”-”MoH”u”-.uc~”” ~“-~”H”MHH.M”~-”3-l 3.2.1 81431nterface Board ““.--”.-”-.”--””-”--.”-”---- “.-”-.--”-.--”--”--”3-2 3.3 PULL TRACTOR UNIT””-M””--- “c-”~”H.u”-””~”M”H”M”H””HHsM “H”-.~”-”uH”~.~cc”H3~4 3.3.1 Paper Feed Operations “--”-”-”-”-”””--””-”-”--”-””- -“-”-””---”--””’-3-5 3.3.1.1 Pull Sproket Feed Operation ..........3.3.1.2 Push-Pull Feed Operation ““mti”-””m”mm””-”-ti”m””m”-ti”...
  • Page 121 REV.-A LIST OF TABLES Table 3-1. Optional Interfaces ..fl~.-.-.-..”o”.oH.”o--””H’”- ““~-”~~~~-””~”~-””=~”-””3-l Table 3-2. 8143 Jumper Settings ......“-----””--”-”--”---3-2 Table 3-3.

  • Page 122: Optional Interfaces

    REV.-A 3.1 GENERAL This chapter describes the options available for the LQ-860/1060. OPTIONAL INTERFACES The LQ-860/1060 uses the 8100 series optional interlaces. The main oPtional interfaces are listed in Table 3-1. Table 3-1. Optional Interfaces Description Cat. Function Buffer Size Standard #81 72 32 K-byte buffer parallel interface...
  • Page 123 REV.-A 3.2.1 8143 Interface Board When the RS-232C and 20 mA neutral current loop are in use, the printer will also support the 8143 new serial interface. Specifications Asynchronous Synchronization 75 to 19,200 BPS Bit rate Word length 1 bit Start bit 7 or 8 bit* Data bit...
  • Page 124 REV.-A DIP Switch Settings Table 3-3 shows the 8143 DIP switch settings, and Table 3-4 lists the bit rates selected by the DIP switch settings. When a standard 8-bit parallel interface is used instead of the 8143 l/F board, DIP switch 1-8 should be turned off. Table 3-3.

  • Page 125: Pull Tractor Unit

    REV.-A PULL TRAcTOR UNIT for the LQ-860 and LQ-106(1. PuII available are optional pull tractor units, The C80007t and C800~Ol feeding and push-PUll feedin9 by mounting the of the PaP are possible sproCkd Pull tractor unit ins@ad ~~~~~~n3~:1;h0ws the exterior views of the LQ-860/1060 with pull tractor unit. LQ4315Q with C8W071 f-:: with C8OO1O1...
  • Page 126 REV.-A 3.3.1 Paper Feed Operations The operational differences between the standard push tractor and the CmO070/C800090 Pull tractor unit are described in below. 3.3.1.1 Pull Sproket Feed Operation Figure 3-2 shows the gear arrangement and paper path used with pull sproket feeding. Sproket Paper H Ribbon...
  • Page 127 REV.-A 3.3.2 Dissasembly a n d A s s e m b l y This section describes the pull tractor sprocket assembly L (Left) and R (Right) removal, which requires special explanation. Remove the E-ring RE (2.3) from sprocket mountin9 plate L (Left), then remove the sprocket Step 1 : paper holding lever and sprocket paper holding spring L.

  • Page 128: Cut Sheet Feeder

    REV.-A 3.4 CUT SHEET FEEDER For the LQ-860/1060, both the single-bin cut sheet feeder C606141 /C806181 and double-bin cut sheet feeder C806151 /C806191 are available. Both cut sheet feeders are controlled by the firmware included in the printer. The cut sheet feeder has the following features : .
  • Page 129 REV.-A ..[ :: ,.. . , , 3.4.1 Specifications Cut Sheet Feeder Hopper Capacity Cut sheets: sheets..82 g/m2 paper 185 sheets..,..64 g/m2 paper Envelopes: (only for bin 1 of the double bin cut sheet feeder) 25 sheets, maximum..xerographic or bond paper 30 sheets, maximum..
  • Page 130 REV.-A Dimensions and Weight Refer to Table 3-6. Table 3-6. Dimensions and Weight Width [mm] Depth [mm] Height Weight [Kg] [mm] C806141 Approx. 2.5 Approx. 3.8 C806151 C806181 Approx. 3.2 Approx. 4.8 C806191 NOTE : Dimensions are the measured values with the CSF being mounted on the printer.
  • Page 131 REV.-A Paper NOTES: 1. other paper with medium or high wood content and very light or very heavy paper must operationally tested prior to regular use. Paper with a textured, embossed, glossy, or hammered surface also must be tested individually to prior to regular use. The cut sheet feeder may not feed smoothly with some kinds of paper.
  • Page 132 REV.-A Operating Principles 3.4.2 CSF The printer can be set to the cut sheet feeder mode by either the hardware or software setting. Hardware Setting The cut sheet feeder mode can be set with the DIP SW2-8 at the left side of the control panel. See Table 3-8.
  • Page 133 REV.-A 3.4.2.1 Paper Path and Gear Train Figure 3-7 shows the paper path when the cut sheet feeder is mounted. The LQ-860/1060 with the cut sheet feeder being mounted can handle the fan-fold paper as it is. It is not necessary to dismount the cut sheet feeder.
  • Page 134 REV.-A Figure 3-8 shows the gear train. When the continuous paper is used, the paper release lever pushes up the friction/tractor switch lever. At this time, the drive switch gear is in the release state and cancels the power conveyed from the paper ejecting gear.
  • Page 135 REV.-A ,$--”’:, 3.4.2.2 Bin Switch Operation Selection between bin 1 and bin 2 of the cut sheet feeder (double-bin model) is performed by the panel setting or the software command. How the paper is loaded by the selected bin is illustrated in Figures 3-9 and 3-10.
  • Page 136 REV.-A START: Platen (Rotates with platen gear) STEP 1: STEP 2: STEP 3: q:..-~ ----- Rotation: @ Forward @ Reverse Figure 3-10. Bin 2 Selection 3-15...
  • Page 137 REV.-A ””’ , 3.4.3 Disassembly and Assembly This section describes the procedure for removing the hopper unit of the cut sheet feeder. Unless otherwise specified, the disassembled parts are reassembled by simply performing the disassembly operation in the reverse sequence. The tools are listed in Table 3-9.
  • Page 138 REV.-A Paper Support Shaft Holder Side Frame Figure 3-12. Paper Support Shaft Holder Removal Shaft Holder >e Platen Figure 3-13. Hopper Unit Removal WARNING When required to replace one paper loading roller, both right and left rolers must be replaced at the same time.
  • Page 139 REV.-A 3.4.4 Preventive Maintenance feeder requires a minimum of preventive maintenance. Required Due to their proven design, cut sheet preventive maintenance includes : General cleaning of the device. Checking the mechanical functions. Cleaning of the paper loading rollers and the paper ejecting rollers is necessary at regular intervals and can be carried out after instruction.
  • Page 140 REV.-A CHAPTER DISASSEMBLY, ASSEMBLY, AND ADJUSTMENT 4.1 GENERAL REPAIR INFORMATIONC “..u.,””-.”HSM”M”H”MU”M””H””H “xMco’~-.Hou”oH.4-l 4.2 DISASSEMBLY AND ASSEMBLY”””--””H””-~””U”~M” -“OH”--.”~”~MOM”UOUH””””-4-5-5 4.2.1 Upper Case and Control Panel Removal ““”-.-”~”~”~”~~”.”~~””~.-”~ ““-.4-6 4.2.2 Push Tractor Unit Removal .“-”””.-”-.-””--”-”-””--”-””- -“-”-”--”-”-”-”4-7 4.2.3 Circuit Board Removal””””.”””.””””.””.””.”””.” c“”.”””””0””.”.”.”.c””.”c”o.”0”.””-c. “.”””’”4-8 4.2.3.1 JUNNIM Board Removal -“”cH””-”H”-”H”.--””=”UM”H”H “H-.usuo”H4-8 4.2.3.2 Fan Unit Removal .
  • Page 141 REV.-A g:,.., 4.3.3 Electric Board Adjustment ““”””” ““”””””””””” ““”””””” ““” “ ““” ““”’””””-”” ““”” ““” “ ““”””””””””4-40 4.3.3.1 Bidirectional Value Adjustment ~“”~”””~”-----”-”~”””f”””=wo”=wo LIST OF FIGURES Figure 4-1. LQ-860/1060 Parts ....“....“.”””””.. ““””””.”” .“. .“.””” ““” ”” ”” ”-4-2 Transport Locking Brackets Installation .
  • Page 142 REV.-A Figure 4-34. Mainframe Unit ““-””---””-”-””--.”-”-”--”- ““-”--”-””--”-.-.---”-4-28 Figure 4-35. BaseFrameUnit .“”””-”..”””””””””””””””””””””””””” .“”””.”””””””.”.”.”-”...””””””””””.4-28 Carriage Removal “u””-M”-”-u”~”H”~”u”-.uoHo-” H“-.~o~”--o~H-.-H-294-29 Figure 4-36. Figure 4-37. Leaf Spring and Parallel Adjustment Bush lnstatlation -u-”.”-M”-.u-”-”M”--”Moc2929 Figure 4-38. Paper Guide Plate Spring and Paper Guide Plate Removal “tiH”HoM”-””M”tiou”””-MM”o”m “~~”~”4-30 Figure 4-39.

  • Page 143: General Repair Information

    B740200100 Electric soldering iron B741400200 Brush No. 1 B7414OO1OO Brush No. 2 Creaning brush B741600100 O : Commercially available product E : EPSON exclusive tool Table 4-2. Measuring Instruments Designation Necessary Convenient Specification Muitimeter Oscilloscope 20 MHz or more Table 4-3. Lubricants and Adhesive...
  • Page 144 REV.-A ,7.. “!. Figure 4-1 shows some of the parts found on the LQ-880/1080. Sheet Guide ‘ h eetGui d ecover247!2%A Option Board Cover *..‘ r i n ’ e r;:;covex, a ’ ’ n K”ob ‘%., Panel Control...
  • Page 145 REV.-A WARNING There are several precautions you should take after performing troubleshooting and when packing the printer for transport: 1. Slide the printhead to the middle of the printer. Then remove the paper tension unit. 2. Remove the sheet guide, ribbon cartridge, and platen knob. 3.
  • Page 146 REV.-A Screws, washers, nuts, etc. are abbreviated using the conventions below. Table 4-4. Small Parts Abbreviations List Part Name Abbreviation Cup Screw C r o s s - B i n d - h e a d B - t i g h t C13B (CTBB) Cross-Bind-head S-tight...
  • Page 147 REV.-A DISASSEMBLY AND ASSEMBLY Components of the LQ-860/1060 may be assembled simply by performing the disassembly operation in reverse sequence. Assemboly procedures, therfore, have been omitted. The sequence of this disassembly in this section is grouped into three parts: (1) removal of the upper case, (2) removal of the push tractor unit, (3) removal of the circuit boards, and (4) disassembly of the printer mechanism.
  • Page 148 REV.-A ,<:,, 4.2.1 Upper Case and Control Panel Removal check the interior of this printer, first remove the upper case using the steps listed in the paragraphs below. DANGER Prior to beginning the following procedures, be sure to disconnect the power cord and interface cable, and remove the paper installed in the printer.
  • Page 149 REV.-A 4.2.2 Push Tractor Unit Removal Remove the push tractor unit before removing the circuit boards and the printer mechanism from the lower case. Remove the upper case (Refer to Section 4.2.1.). Step 1 : Position the paper release lever at the its front setting. Step 2: Step 3: Remove the two CBS(0) (M3x6) screws securing the push tractor to the printer mechanism.
  • Page 150 REV.-A 4.2.3 Circuit Board Removal . . . This printer includes two circuit boards : the JUNMM controller circuit board and MONPS/MONPSE power supply circuit board. 4.2.3.1 JUNMM Board Removal Step 1 : Remove the upper case (Refer to Section 4.2.1.). Step 2: Remove the push tractor unit (Refer to Section 4.2.2.).
  • Page 151 It is very dangerous to allow the lithium battery to short, because it could burst. Danger of explosion if the battery is incorrectly replaced. Replace only with same or equivalent type recommended by Seiko Epson Corp.. Discard used batteries according to goverment’s safety instruction.
  • Page 152 REV.-A 4.2.3.2 Fan Unit Removal Remove the upper case (Refer to Section 4.2.1.). Step 1 : Step 2 : Disconnect the connector CN2 on the MONPS/MONPSE board, then remove the fan unit (Refer to Figure 4-Io.). Step 3: Open the bent tab, then separate the fan motor from the fan adapter. Fan Motor Fan Adaptor ‘..
  • Page 153 REV.-A 4.2.3.3 MONPS/MONPSE Board Removal Step 1 : Remove the upper case (Refer Section 4.2.1.). Step 2: Remove the push tractor unit (Refer to Section 4,2.2.). Remove the fan unit (Refer to Section 4.2.3.2.). Step 3: Step 4: Disconnect the connector CN1 which connect the JUNMM board and the CN2 which connect the fan unit.
  • Page 154 REV.-A 4.2.4 Printer Mechanism Disassembly This section describes the procedures for disassembling the main components of the printer mechanism. Refer to Figures A-36 and A-37 in Appendix during assembly. 4.2.4.1 Printer Mechanism Removal Step 1 : Remove the upper case (Refer to Section 4.2.1.). Step 2: Remove the platen knob.
  • Page 155 REV.-A 4.2.4.2 Printhead Removal Step 1 : Remove the printer cover A. Step 2: Slide the carriage to the left, then remove the ribbon cartridge. Step 3: Move the head lock levers to the outside. Step 4: Shift the printhead slightly toward the platen side, pull it upward, slide it to the right, and remove from the carriage.
  • Page 156 REV.-A Head Cables (F and R) and Color Select Cable Board Removal 4.2.4.3 Remove Step 1 : printer mechanism (Refer to Section 4.2.4.1.). Step 2: Remove the printhead (Refer to Section 4.2.4.2.). Step 3: feed motor. Disconnect the connector of the color select/ribbon Step 4: Disconnect the connector of the color select sensor.
  • Page 157 REV.-A 4.2.4.4 Carriage Motor Removal Remove the printer mechanism (Refer to Section 4.2.4.1.). Step 1 : Step 2: Cut the wire clamp, then remove the carriage motor lead wire from the base frame. (See Figure 4-12.) Step 3: Remove the belt tension spring. Step 4: Remove the four CBS(0) (M3x6) screws securing the carriage motor to the base frame.
  • Page 158 REV.-A 4.2.4.5 Timing Belt Removal Step 1 : Remove the printer mechanism (Refer to Section 4.2.4.1.). Remove the carriage motor (Refer to Section 4.2.4.4.). Step 2: At this time, it is not necessary to cut the wire clamp, which binds the lead wires from the NOTE : carriage motor.
  • Page 159 REV.-A 4.2.4.6 Home Position Sensor Removal Step 1 : Remove the printer mechanism (Refer to Section 4.2.4.1.). Press the two tabs of the home position sensor on the bottom of the base frame. Step 2: Remove the home position sensor. Step 3: Disconnect the connector from the home position sensor.
  • Page 160 REV.-A 4.2.4.7 Platen Gap Sensor Removal Step 1 : Remove the printer mechanism (Refer to Section 4.2.4.1.). Cut the wire clamp, then remove the carriage lead wires, from the base frame. (See Figure 4-12.) Step 2: Step 3: Position the head adjustment lever at a setting between the 1st and 2nd positions. Remove the two tabs securing the platen gap sensor to the left frame, then remove the sensor.
  • Page 161 REV.-A 4.2.4.8 Paper Feed Motor Removal Remove the printer mechanism (Refer to Section 4.2.4.1.). Step 1 : Remove the two CBS(0) (M3x6) screws. Step 2: Remove the paper feed motor. Step 3: Paper Feed Motor CBS(0) (M3x6) Figure 4-22. Paper Feed Motor Removal FADJ”STMENTRE”U’...
  • Page 162 REV.-A 4.2.4.9 Friction/Tractor Sensor Removal Step 1 : Remove the printer mechanism (Refer to Section 4.2.4.1.). Step 2 : Position the paper release lever at the its back setting. Step 3: Remove the CPS(P) (M3x1O) screw securing the friction/tractor sensor to the right frame, then remove the sensor.
  • Page 163 REV.-A 4.2.4.10 Paper End Sensor Removal Step 1 : Remove the printer mechanism (Refer to Section 4.2.4.1.). Step 2: Loosen the two bends securing the paper end sensor to the back of the paper guide. Step 3: Remove the paper end sensor. Paper End Sensor Paper Guide B&d...
  • Page 164 REV.-A 4.2.4.11 Platen Unit Removal Step 1 : Remove the upper case (Refer to Section 4.2.1.). Remove the two CBNS (M3x6) screws securing the platen cover to left and right frames, then Step 2: remove the platen cover. i,.; Platen Cover Removal Figure 4-25.
  • Page 165 REV.-A 4.2.4.12 Color Select Sensor Removal Step 1 : Remove the upper case (Refer to Section 4.2.4.1.). Step 2: Position the color select sensor mounting part of the carriage at the cutout in the base frame. Step 3: Open the tab of the ribbon drive base, then remove the color select sensor from the carriage. Step 4: Disconnect the connector of the color select sensor from the color select cable board.
  • Page 166 REV.-A 4.2.4.13 Color Select/Ribbon Feed Motor Removal Step 1 : Remove the printer mechanism (Refer to Section 4.2.4.1.). Step 2 : Remove the printhead and head cable from the carriage. (Refer to Section 4.2.4.2.) Disconnect the color select/ribbon feed motor and color select sensor connectors from the Step 3: cable board.
  • Page 167 REV.-A ASSEMBLY POINT : . When installing the ribbon drive gear, set it as shown in Figure 4-30. & Ribbon Drive Gear 1111 LS (3.4x0.06x11) +Carriage Figure 4-30. Ribbon Drive Gear Setting 4-25...
  • Page 168 REV.-A 4.2.4.14 Paper Release Lever and Sub Paper Release Lever Removal Step 1 : Remove the printer mechanism (Refer to Section 4.2.4.1.). Step 2: Remove the paper feed motor (Refer to Section 4.2.4.8.). Step 3: Remove the tractor transmission gear spring, washer PW (5.2xO.3X1O), paper feed reduction gear, and tractor transmission gear.
  • Page 169 REV.-A 4.2.4.15 Main Frame Unit and Base Frame Unit Separation Remove the printer mechanism (Refer to Section 4.2.4.1.). Step 1 : Step 2: Remove the timing belt (Refer to Section 4.2.4.5.). NOTE: The carriage motor need not be removed. Step 3: Remove the paper feed motor (Refer to Section 4.3.4.8.).
  • Page 170 REV.-A Figure 4-34. Main Frame Unit n - - - - - Figure 4-35. Base Frame Unit ADJUSTMENT REQUIRED When the paper feed motor is replaced or the fixing screws are loosened, perform the following adjustment: Section 4.3.1.3 Paper Feed Motor Gear Backlash Adjustment ,“...
  • Page 171 REV.-A 4,.2.4.16 Carriage Removal Remove the printer mechanism (Refer to Section 4.2.4.1.). Step 1 : Step 2 : Separate the main and the base frame units (Refer to Section 4.2.4.15.). Remove the two HNO (4) nuts from left frame, which secure carriage guide shafts A and B. Step 3: nut from the right frame.
  • Page 172 REV.-A 4.2.4.17 Paper Guide PIate Removal Remove the printer mechanism (Refer to Section 4.2.4.1.). Step 1 : Step 2: Separate the main and base frame units (Refer to Section 4.2.4.15.). Step 3: For the LQ-860, remove three paper guide plate springs or for the LQ-106O remove four paper guide plate springs with the mechanism status.
  • Page 173 REV.-A 4.2.4.18 Paper Feed Roller Unit Removal Remove the printer mechanism (Refer to Section 4.2.4.1.). Step 1 : Step 2 : Separate the main and base frame units (Referr to Section 4.2.4.15.). Remove three paper feed springs for the LQ-860 or four for LQ-106O from the hook on the base Step 3: frame.
  • Page 174 REV.-A 4.2.4.19 Push Tractor Unit Disassembly This section describes the removal of the tractor assembly (left). Since disassembled Patis can be assembly procedures have been omitted. reassembled by using the removal procedures in reverce order, Remove the shaft holder from the tractor left frame. Step 1 : Remove the CBS(0) (M3x6) screw securing tractor left frame to the tractor base frame.
  • Page 175 REV.-A 4.2.4.20 Paper Tension Unit Disassembly This section describes the removal of the paper tension roller shaft assembly. Since disassembled parts can be reassembled by using these procedures in reverse order, the assembly procedures have been omitted. Remove the RE (4) on the paper tension roller shaft at the outside of the paper tension left frame. Step 1 : Disconnect the paper tension shaft holder from the paper tension left frame by sliding it toward Step 2:...
  • Page 176 REV.-A 4 . 3 A D J U S T M E N T This section describes the adjustment procedures required when reassembling this printer. When disas- sembly or replacement is performed during maintenance or repaires of the parts described in this section, the following adjustments should be performed to ensure proper operation.
  • Page 177 REV.-A Thicknes Gau9e (0.41 AO.02 mm) / ’ ” / ’ ” Cafria9e’Guide Shafi B Pa{allel Adjustment Bush Gap Parallelism Adjustment Figure 4-45. Platen 4-35...
  • Page 178 REV. -A 4.3.1.2 Platen Gap Adjustment Adjust the gap between the platen and the printhead when : When the mounting positions of carriage guide shaft B and the head adjustment lever are changed. Step 1 : Remove the printer mechanism (Refer to Section 4.2.4.1.). Step 2: Remove the printhead (Refer to Section 4.2.4.2.).
  • Page 179 REV.-A Thicknss Gauge , (0.41+0.02 mm) Screwdriver Lever ‘“ I Carriage Guide Shaft B[ Figure 4-46. Platen Gap Adjustment 4-37...
  • Page 180 REV.-A Screwdriver 0.41 tO.02 mm d 1= Screw a>b , , , . . , , Figure 4-48. Platen Gap Figure 4-47. Carriage Guide Shaft B Eccentric 4-38...
  • Page 181 REV.-A 4.3.2 Paper Feed Motor Gear Backlash Adjustment This adjustment is required either when: The paper feed motor is replaced or when its mounting position is shifted. Remove the printer mechanism (Refer to Section 4.2.4.1.). Step 1 : Step 2: Loosen the two CPS(0) (M3x6) screws on the paper feed motor.
  • Page 182 REV.-A 4.3.3 Electric Board Adjustment This section describes the JUNMM board adjustment. if replace the JUNMM board or printer mechanism, perform the adjustment in below. 4.3.3.1 Bidirectional Value Adjustment If printing is misaligned in during bidirectional printing, align the printer by adjusting VRI and VR2 on the in Figure 4-50 (Refer to Figure 4-51 JUNMM board, according to the alignment sequence flowchart shown...
  • Page 183 REV.-A S T A R T Align the printing position. Feed the paper backward Feed the paper backward VR2 Adjustment for 1000 steps. Depress the ON LINE. Depress the TEAR OFF. Pef-formthetestprint. Initialize printer. E N D Figure 4-50. Print Position Alignment Sequence 4-41...
  • Page 184 REV.-A Print character “l” for three lines at mode =3. Feed the paper forward for 1060 steps. Adjust the VR2. Depress LINE FEED. Which mode VR1 Adjustment select VR1 adjust or enter J’ i t * $-””- Figure 4-50. Print Position Alignment Sequence 4-42...
  • Page 185 REV.-A Figure 4-51. Positions of Switches and VRS Printing Position Alignment Check Figure 4-52 shows three lines of test printing with characters “1”. Using this printout, check the following: Odd Line ..Reference Even Line..Move Figure 4-52. Test Printing for Printing Alignment Check which directionof the even-numbered line (2’nd) is shifted as compared tothe odd-numbered lines (lstand3’rd) To shift the even-numbered iinetothe left, press the TEAR OFF switch.

  • Page 186: Troubleshooting

    REV.-A CHAPTER 5 TROUBLESHOOTING 5.3.1 MONPS/MONPSE Board Unit Repair “’”U”-””H”-”-””U-”-””-U”H”-”U ~“-””5-14 5.3.2 JUNMM Board Unit Repair H“.MO”.H-.”-”H”.~-”-.”-”H”H” -“uu”H””u”--”u.5-2O 5.3.3 Printer Mechanism Unit Repair .“--””-..-”-.-”-”-.”--”-.”- -“-”-”--”-”5-22 LIST OF FIGURES Troubleshooting Procedure ““” ”””””””””””””””””””””””””””””” ““” ”” ”” ”” ”” ”” ”” ”” ”” ”” ”” ”” ”” ”””5-1 Figure 5-1.
  • Page 187 REV.-A 5.1 GENERAL Because various types of trouble can occur, trouble shooting is not easy to perform. Here, a simple procedure is provided to perform trouble shooting, as shown in Figure 5-1. Unit Replacement Figure 5-1. Troubleshooting Procedure First, perform repair by unit replacement to determine defective units. Then replace the defective compo- nents in the defective unit.

  • Page 188: Unit Replacement

    REV.-A 5.2 UNIT REPLACEMENT The unit replacement is based on system analysis. According to the particular symptom found by the multimeter, the units listed in Table 5-2 need to be replaced. First, find the corresponding symptom by referring to Table 5-3, then check the problem by referring to the flow charts on the pages indicated in the column “Reference Pages.”...
  • Page 189 REV.-A Table 5-3. Symptoms and Reference pa9es Referel Problem Indicators Symptom Pag( printer does not oper- LEDs are lit on the control panel. ate at all with power Fan unit does not operate. Printer mechanism is not initialized. switch on Carriage does not stop at the home position after the power is Carriage mechanism turned on.
  • Page 190 REV.-A f’:..power switch on. Printer does not operate at all with . . . M e a s u r e t h e A C i n p u t v o l t a g e . Use correct AC input voltage.
  • Page 191 REV.-A Printer mechanism is not initialized turned on, is the mechanism Replace the printer mechanism. Replace the JUNMM board. Confirm that the C.G. ROM (3A) is inserted correctly.
  • Page 192 REV.-A 3. Incorrect printing with normal carriage operation In the self-test or normal printing mode: Using a black ribbon cartridge. START Install the black ribbon cartridge. Perform the self-test. the bi-directional Align printing positions. (Refer to Section 4.3.2.1.) Check the printhead thermistor not open.
  • Page 193 REV.-A b) In the self-test: Using a color ribbon cartridge Replace the printer mechanism. color ribbon cartridge move JUNMM board. Perform the self-test. Align the bi-directional color printing (violet, orange, and green), are printing positions printing positions. (Refer to Section 4.3.2.1.) ‘f...
  • Page 194 REV.-A 4. Abnormal paper feed Select the corresponding paper feeding method by feeding method and the ‘:::’:’;:’paper rotate smoothly when turned Replace the printer ,fi.. mechanism. ’ , Is the fault corrected’? Repluce the Replace the JUNMM board p r i n t e r m e c h a n i s m...
  • Page 195 REV.-A Abnormal control panel oper loading operation when push the FORM FEED, LINE FEED, and Load the paper and push the ON LINE switch. Operate each switch and confirm that the corresponding LED is lit with beep. switch and LED operate Replace the panel unit.
  • Page 196 REV. -A ~:,,, LINE Incorrect printing in ON mode ..,, <. Refer to other troubleshooting Check the settings of the interface wnlcn Inremace Are the settings correct ? between the printer and host :- !-- :-- .--..I Check the interface cable between the printer and host computer as follows: Change the settings.
  • Page 197 REV.-A Table 5-4. MONPS Board Environmental Condition ‘owersupp’y’i n e +35–GP 35.4 35.5 35.5 +12– GND –12– GND –9.9 –10.0 –10.0 +5–GND NOTES : 1. These voltage are measured when printer is in waiting mode. 2. Input voltage is 120V AC. Table 5-5.
  • Page 198 REV.-A 5.2 UNIT REPAIR This section describes unit r e p a i r p r o c e d u r e o f t h e d e f e c t i v e u n i t i s o l a t e d i n t h e f o r m e r s e c t i o n . T h e following pages describe repair by replacing defective components or elements in the MONPS/MONPSE board, JUNMM board, and the printer mechanism.
  • Page 199 JUNMM BOARD E512 ‘n .—— m—n PRINTER MECHANISM NOTE : These cables and connectors are longer than the distance between the JUNMM board and the printer mechanism, and MONPS/MONPSE board to make troubleshooting easier. Extension Cable Connections Figure 5-3. 5-13...
  • Page 200 REV.-A f,... 5.3.1 MONPS/MONPSE Board Unit Repair y’ The power supply circuit (MONPS/MONPSE board) is divided into three blocks: (1) Input filter circuit, (2) Secondary side, and (3) Main switching circuit. + 35 v + 1 2 V 5-4. MONPS/MONPSE Board Block Separation Figure <...
  • Page 201 REV.-A Table 5-7. MONPS/MONPSE Board Unit Repair Solution Symptom Caus Checkpoint +5 V line IC20 Replace IC20. .’ dead. malfunction. +35 V line is Refer to the checkpoint list for the +35 dead. V line. +35 V line is Input filter circuit Check the input voltage waveform at Check whether the input filter circuit is...
  • Page 202 Fiaure 5-6. MONPS/MONPSE Board Voltage Waveforms Masuring Channel Voltage Waveform Condition (AVn) Position Storage Inwt Side Emitter Power ;ollecto Power 2 (lNV.) Q2 s i Iov 5-16...
  • Page 203 Figure 5-6. MONPS/MONPSE Board Voltage Waveforms 5-17...
  • Page 204 REV.-A Fiaure 5-6. MONPS MONPSE Board Voltage Waveforms ..z’ L.”. .:, -., 5-18...
  • Page 205 Figure 5-6. MONPS/MONPSE Board Voltage Waveforms 5-19...
  • Page 206 REV.-A .*- \ , : : . , , 5.3.2 JUNMM Board Unit Repair If trouble occurs with the JUNMM board, troubleshoot it as described in Table 5-8. Table 5-8. JUNMM Board Unit Repair Problem Checkpoint Solution Symptom Cause The printer ON : Replace VX does not The VX gen-...
  • Page 207 REV.-A Table 5-8. JUNMM Board Unit ReDair Problem Symptom Solution Cause Checkpoint Paper is not T h e p a p e r Drive Observe the waveforms to check that the Replace the fed normally. feed motor transistor output signals (at pins 30, 31, 32, and 33) correspond- operates defective.
  • Page 208 REV.-A ;f-? 5.3.3 Printer Mechanism Unit Repair troubleshoot it as described in Table 5-9. If trouble occurs with the printer mechanism, ASSEMBLY and 4.3 ADJUSTMENT for replacement and Refer to Sections 4.2 DISASSEMBLY AND adjustment of parts. Table 5-9. Printer Mechanism Unit Repair Problem Checkpoint Solution...
  • Page 209 REV.-A Table 5-9. Printer Mechanism Unit Repair Problem Solutic Symptom Cause Checkpoint Printing is Printing pressure does The PG sen- Check that the PG sensor opens Replace abnormal. not change after the sor is defec- when the head adjustment lever PG sens{ head adjustment lever tive.
  • Page 210 REV.-A CHAPTER 6 MAINTENANCE LIST OF FIGURES Figure &l. LQ-106o(LQ-MO) Lubrication Application Points Diagram -”- ”. ”””. ””’’ ”” ”” ”. ””6-2 LIST OF TABLES Table 6-1. Lubricants" -."".."..""""" "". """"... ""-. "."" -."". "o."."""- ... ”. ””. ”” ”” ””. ”” ””. ””. ”. ”” ”” ””. ”” ”””6-1 Table 6-2.

  • Page 211: Preventive Maintenance

    EPSON recommends that the points illustrated in Figures 6-1 and 6-2 be lubricated, according to the schedule listed in Table 6-2, with EPSON O-2, G-26, and G-27, which have been extensively tested and found to comply with needs of this priter. (Refer to Table 6-1 for details.) Be sure that the parts to be lubricated are clean before applying lubricant, and avoid excessive application, which may damage related parts.
  • Page 212 REV.-A APPENDIX A.1 PRINCIPLE IC SPECIFICATIONS -..-”-””.-”--.”-”-”-”-.-””-- .-”-.-”-.-.-”---.-A-I A.1.l JUNMM Board “-~uo.”H”.~.”-”u””-””~-””-.~H .“~”-”o”H”M.~”-M.o-o-.--o-lA-l A.1.l.l ~PD78213” -.”.-”””-””-”-””--””-.-”-”-”- --”-”-.-””-.-””-”--”-.A-2 A.1.1.2 2 7 2 5 6 “---”--.”---”.-”.-.”--.-.-.-” --”-.--””-”-”--”-.”--7-”-A-7 A.1.1.3 HM65256BLSP-12 ““-””--””--”””---””-””--””-”- “--””-”-”-”-””-A-8 A.1.1.4 HM6264ALP42 -“”-s””-.””--””-”--”.-.-”-”--- “-”-”-.-.-”--”-”-A-9 A.1.1.5 E05A02LAMoH””-..-H...u””Hu ““-”u”M-”M”.H”u.-”-”~-”-”Mo- “H.A-10 A.1.1.6 EO5A1OAA “--””-”.-”.-”-””--..-”----””- .-.”--”-”--.”-”-”--”A-I2 E05A24GA -“mn”””n””ti”m””tiu””-”ti”’o-”ti ““-”~-”~””~-”~”~”~~”A-16 A.1.1.7 A.1.1.8...
  • Page 213 REV.-A SI-7300A Pin Diagram ......... ””..””...”””..”-.”””.””””””. ““A-1 9 Figure A-1 7. SI-7300A Internal Circuit .
  • Page 214 REV.-A Table CN6 Pin Assignments .“..” .” ”” ”. ”” ”” ””... ””””..”” ““”.. ””. ”” ”” ””. ”... ””””-”.”. .“.””.””””.”A-29 A-1 6. Table A-1 7. CN7 Pin Assignments””-”””” .“” ” ..””””.””..”..”...--.”””.”-- “.”.””-”.””.-”..”””-..”.” “A-29 CN8 Pin Assignments ..............A-1 8.
  • Page 215 REV.-A A.1 PRINCIPLE IC SPECIFICATIONS This chapter describes the principal ICS used in this printer. A.1.l JUNMM B o a r d Table A-1 shows the primary ICS used on the JUNMM board. Table A-1. JUNMM Board Primary ICS Reference Location IC Name Type...
  • Page 216 REV.-A ,f?. A.1.l.l ,uPD78213 ,uPD78213 is an 8-bit single chip microcomputer that can access a IM byte memory space. The main functions are as follows : . High speed : 0.40YS instruction cycle (9.83 MHz) . Expanded data memory: Memory space IM byte Interrupt controller: 2 level priority Vectored interrupt handling Macro service...
  • Page 217 SYSTEM CONTROL BUS CONTROL u’~ (lJ** PERIPHERAL BUS IIF Figure A-2. ~PD78213 Block Diagram...
  • Page 218 REV.-A Tahk A-2. IIPD78213 Terminal Functions . ---- . . -- ~. — - —— - — 1/0 I Signal Name Description Pin No. Terminal +5 VDC — 17, 32 Ground Ground 1. c. – Switch bank O Switch bank 1 Switch bank 2 Switch bank 3 —.
  • Page 219 REV.-A Table A-2. ,uPD78213 Terminal Functions Description Pin No. Terminal Signal Name Address bus 8 Address bus 9 Address bus 10 Address bus 11 Al 1 Address bus 12 Al 2 Address bus 13 Address bus 14 Address bus 15 Address/data bus O Address/data bus 1 Address/data bus 2...
  • Page 220 REV.-A Figures A-3 and A-4 show bus interface timing for the basic ,uPD78213 ICLK*l A8– A15 Upper Address (out) “’@ii@---i’z’cEi@ -cEi@--’ ’’--c ADO– AD7 ASTB (out) RD (out) *I: System clwk frequency Figure A-3. Memory Read Timing ICLK*l A8–A15 Upper Address “-’c@D’i’z-<...
  • Page 221 A.1.1.2 2 7 2 5 6 electrically programmable ROM. The 27256 is an EP-ROM, which is an ultra-violet erasable and Fertures .32768 words x 8bits 27 At4 4 !2 . TTL compatible input/output 26 A13 “ +5 VDC single power !2j A 8 .
  • Page 222 REV.-A --- f, ‘. A.1.1.3 HM65256BLSP-12 This is a 8K-byte CMOS static RAM which has low power consumption, and itS inPut/outPut level is compatible with the TTL ICS. Fertures 2 8 Vcc .32768 words x 8 bits 2 7 ~ TTL compatible input/output 2 6 A13 +5 VDC single power...
  • Page 223 REV.-A A.1.1.4 HM6264ALP-12 This is a 8K-byte CMOS static RAM which has low power consumption, and its input/outPut level is compatible with the TTL ICS. Features 27 m A12 2 .8192 words x 8 bits A ? 3 . TTL compatible input/output 25 A8 A6 Ii “...
  • Page 224 REV.-A A.1.1.5 E05A02LA The E05A02LA a gate array IC used to lighten the load on the CPU when processing print data. Figure A-Il. E05A02LA Pin Diagram — R E D Y r — — — — — — ” DO-D7 R ST Figure A-12.
  • Page 225 Table A-6. E05A02LA Terminal Functions Pin No. Terminal Description Printhead solenoids (1 -8) Printhead solenoids (9--16) ON/OFF Printhead solenoids (17--24) ON/OFF Print data/command Address bit O Chip enable Write strobe Reset signal Printhead solenoid trigger pulse REDY Ready signal +5 VDC 9,21,33 —...
  • Page 226 REV.-A g’” A.1,1.6 EO5A1OAA The gate array is a memory management unit iC which contains reset circuit, address latch, memory management unit, and so on. BANK MMI03 AB 15 A814 AB 1’ i jl:o AB 3 CSBOO BANKO AB i ;’...
  • Page 227 GNO VOD (+5V) AB I 5- 8 I LOWER ADDREsS “ ADDRESS A L E LATC I-i DATA DB 7 - 0 AB 15-0 MAN AGEMENT D87*0 PO RTO’-2 MM1OO B I T D A T A 1/0 DEVICE MMIO I PROCESSING MANAGEMENT MMJ02...
  • Page 228 REV.-A -.. . Table A-7. E05A1 OAA Terminal Functions Function Pin No. Name Bank select O BANKO Bank select 1 BANK1 Bank select 2 BANK2 BANK3 Bank select 3 BANK4 Bank select 4 Bank select 5 BANK5 Address bus O Address bus 1 Address bus 2 Address bus 3...
  • Page 229 REV.-A Table A-7. EO5A1OAA Terminal Functions Function Pin No. Name Read strobe Write strobe Address latch enable IC (5A) select PROi IC (6A) select IC (SLOT-A) select PROe Not used BANK Not used ON LINE switch +5 VDC power 33,64 1,32 Power on reset THLD...
  • Page 230 REV.-A A.1.1.7 E05A24GA This gate array IC has an 8-bit parallel l/F circuit and an expanded port function. DINO DIN1 DIN2 DIN3 DIN4 DIN5 AFXT DIN6 CIIN7 INIT IOUT N.C. TESTEN SLCT SOUT WDOG N.C. BUSY N.C. ERROR N.C. SLCT IN Figure A-15.
  • Page 231 REV.-A Table A-8. E05A24GA Terminal Functions Function Name Pin No. Receive serial data RXD (IN) Parallel/serial select DIN7 Data bus 7 DIN6 Data bus 6 Data bus 5 DIN5 Data bus 4 DIN4 Data bus 3 DIN3 DIN2 Data bus 2 Data bus 1 DIN1 DINO...
  • Page 232 Table A-8. E05A24GA Terminal Functions 10 I Function Name 27,22, Not used 25, 18 IOUT Not used Chip select signal Reset signal SOUT Output Serial data ..4.,, A-18...
  • Page 233 REV.-A A.1.1.8 SI-7300A The SI-7300A is a unipolar constant current chopper type driver IC, and includes a control/drive circuit for a 4-phase stepper motor. S 1 - 7 3 0 O Figure A-17. SI-7300A Pin Diagram BOUT 1 Figure A-18. SI-7300A Internal Circuit A-19...
  • Page 234 REV.-A Table A-9. SI-7300A Terminal Functions Terminal Description Pin No. +35 VDC – COMAE CR motor coil A/B drive voltage COMCD CR motor coil C/D drive voltage CR motor coil A drive pulse CR motor coil B drive pulse CR motor coil C drive pulse CR motor coil D drive pulse CR motor coil A drive terminal CR motor coil B drive terminal...
  • Page 235 REV.-A A.I.1.9 TL431 The TL431 is a high accuracy temperature compensated shunt regulator. The output voltage can be changed between 2.5 to 36V by adding two external resistors. The TL431 has high stability and outputs a large current so that it can replace various zener diodes. Features .
  • Page 236 REV.-A . . . A.1.l.11 7486 A.1.1.1O 7406 Vcc 4B Figure A-21. 7486 Pin Assignment Figure A-20. 7406 Pin Assignment . . . $, .- A.1.1.13 75189 A.1.1.12 75188 INPUT A RESPONSE INPUT D1 INPUT D INPUT A CONTROL A RESPONSE INPUT OUTPUT A...
  • Page 237 REV.-A A.1.2 MONPS/MONPSE Board Table A-10 shows the primary ICS used on the MONPS/MONPSE board. Table A-10. MONPS/MONPSE Board Primary ICS Reference Location IC Name Type Description Section A. 1. 1.9 Adjustable Precision Shunt Regulator Q5. Q20 TL431 CLPB A. 1. 2.1 IC20 STR20005 +5 V DC Chopper-type Switching Regulator...
  • Page 238 REV.-A A.1.2.1 STR20005 The STR20005 is a chopper type switching regulator IC which obtains a stable output voltage of +5V. 2 3 4 5 000== Figure A-24. STR20005 Pin Diagram TR I ~ R4 M I C I – < r–-‘...
  • Page 239 REV.-A A.2 CONNECTOR PIN ASSIGNMENTS Figure A-26 shows interconnections of the primary connectors and cables. Table A-12 gives a summary of each connector. NOTE : The signal directions for the connectors are as viewed from the JUNMM board, ~ –– – --7 ~ . –– .- ~ –...
  • Page 240 &.-& ..> Table A-1 2. Connector Summary Reference Destination Description Cable Board Table computer 1-13 Host JUNMM (8-bit parallel) CN2 I #81 XX l/F board A-13 (option) — CN3 I Not used l– I —...
  • Page 241 REV.-A x I : LQ.1060 uses #8BX. x 2 : Metric screws are used. Inch screws are used in #8E5. NOTE : In this section, the following abbreviations are used: CR: Carriage PF: Paper feed CS: Color select PG: Platen gap F/T : Friction/tractor RF: Ribbon feed PE : Paper end...
  • Page 242 REV.-A Table A-13. CN2 Pin Assignments Description Pin No. Signal Error ERROR Paper end Data bit 6 D6 (B4) BUSY Busy Data bit 5 D5 (B3) ACKNLG Acknowledge Data bit 4 (Parity disable) D4 (Par-dis) INIT Initialize Data bit 3 (Odd/Even parity select) D3 (0/E) STROBE Strobe pulse...
  • Page 243 REV.-A Table A-16. CN6 Pin Assignments Description Pin No. Name CSRBA Phase A drive pulse CSRBB Phase B drive pulse Phase C drive pulse CSRBC CSRBD Phase D drive pulse Common phases A to D Ground +5 VDC CSLED CSHOME Color select sensor signal Pin Assignments Table A-1 7.
  • Page 244 REV.-A Table A-1 9. CN9 Pin Assignments Description Pin No. Name — 1. 2 Ground +5 VDC 3. 4 +12 VDC –12 –12 VDC Table A-20. CN1 O Pin Assignments Description Pin No. Signal +5 VDC CRLED — Ground Carriage home position signal CRHOME CN11 P i n A s s i g n m e n t s “...
  • Page 245 REV.-A Table A-25. CN16 Pin Assignments Description Pin No. Signal READY LED RYLED Buzzer BUZZER ON LINE switch ONLSW Serial data DTLED Parallel data output trigger pulse LDLED Serial data synchronous clock CKLED Switch bank O Switch bank 1 Switch bank 2 Switch bank 3 Switch bank 4 Switch data O...
  • Page 246 REV.-A Table A-26. CN17 Pin Assignments Description Pin No. Signal Data bus 5 Data bus 4 Data bus 7 Bank 1 Address bus 5 Address bus 6 Address bus 10 Reset signal — Ground Address bus 9 Address bus 8 Data bus 2 Data bus 1 Read strobe...
  • Page 247 REV.-A Table A-27. CN18 Pin Assignments Description Pin No. Signal Data bus 5 Data bus 4 Data bus 7 Bank 1 Address bus 5 Address bus 6 Address bus 10 Reset signal Address bus 9 Address bus 8 Data bus”2 Data bus 1 Read strobe Data bus O...
  • Page 248 REV.-A A.3 DRAWINGS ---- ; 3 : - - - - . . , Figure A-27. MONPS Board Component Layout A-34...
  • Page 249 --—. - --- IC20 J 2 4 mow’ B L U E 7“ Figure A-28. MONPSE Board Component Layout A-35...
  • Page 250 ,# . “’ .2,; “1 -:’2” ‘ 1202 Ozaz UOEE C-O ZZH’Z ———— Figure A-29. MONPS Board Circuit Diagram...
  • Page 251 REV.-A . . . “. xl Onz(b %1 UXZO* OX*9* A . . * . ,“,,, Figure A-30. MONPSE Board Circuit Diagram A-37...
  • Page 252 — -- , - . ,..,. ,.. , . - ..‘+ Figure A-31. JUNMM Board Component Layout A-38...
  • Page 253 EPSON SEIKO EPSON CORPORATION PRINTER DIVISION EPSON OVERSEAS MARKETING LOCATIONS EPSON DEUTSCH LAND GmbH EPSON AMERICA, INC Zulpicher StraBe 6,4000 Dtisseldorf 11 2780 Lomita 81vd., F. R. Germany Torrance, Calif. 90505, U.S.A Phone: (021 1 ) 56030 Phone: (21 3) 539-9140...

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