Star Micronics NX-2460C Technical Manual
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Star Micronics NX-2460C Technical Manual

Star Micronics NX-2460C Technical Manual

Dot matrix printers
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DOT MATRIX PRINTER
NX-2460C
NX-2460
LC-240C
LC-240
TECHNICAL MANUAL
[THIRD EDITION]

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  • Page 1 DOT MATRIX PRINTER NX-2460C NX-2460 LC-240C LC-240 TECHNICAL MANUAL [THIRD EDITION]...
  • Page 2 However, should any errors be detected, STAR would greatly appreciate being in- formed of them. • The above notwithstanding, STAR can assume no responsibility for any errors in this manual. © Copyright 1996 Star Micronics Co.,Ltd.
  • Page 3 It is intended for use as a reference for periodic inspections and maintenance procedures. This manual is prepared for use at a technical level and not for the general user. Model Type Destination NX-2460C Colour For American, Asia market NX-2460 Monochrome...

  • Page 5: Table Of Contents

    CHAPTER 1 GENERAL SPECIFICATIONS External Appearance and Composition .............. 3 Control Panel ......................5 Parallel Interface ....................6 3-1. General Specifications ................... 3-2. Connector Signals ....................Serial Interface (optional) ..................7 4-1. General Specifications ................... 4-2. Connector Signals and Functional Descriptions ..........4-3.

  • Page 6: General Specifications

    GENERAL SPECIFICATIONS – 2 –...

  • Page 7: External Appearance And Composition

    GENERAL SPECIFICATIONS External Appearance and Layout Fig. 1-1 External dimensions Guide Wire Automatic sheet feeder Front cover Control panel Interface connector Fig. 1-2 Front View of the Printer – 3 –...
  • Page 8 GENERAL SPECIFICATIONS Platen Paper tray cover Ribbon Cartridge Print head Fig. 1-3 Front Cover removed Carriage Paper Feed Motor Motor Cable Holder Carriage Print Head Printer Mechanism Power Supply Unit Home Positon Board (Colour) Main Logic Board Control Panel Board Release Lever SW Home Positon SW (Monochrome)

  • Page 9: Control Panel

    GENERAL SPECIFICATIONS Control Panel PAPER READY Push On-Line Sleep Hold READY-LAMP PAPER SW READY SW SLEEP MODE SW PAPER &READY SW PAPER Switch paper end SW…once manual insert SW…twice ASF insert paper On-line paper eject Off-line Short time sw push Long time sw hold paper eject Continue...

  • Page 10: Parallel Interface

    GENERAL SPECIFICATIONS Parallel Interface 3-1. General Specifications Item Specifications Interface Centronics-compatible Synchronization System Via externally supplied STROBE pulse I/F Protocol Using ACK and BUSY signals Logic Level Compatible with TTL level 2.6ms 2.6ms Data STROBE (EDS G-1 : ON) STROBE (EDS G-1 : OFF) BUSY t : More than 0.5ms...

  • Page 11: Serial Interface (Optional)

    GENERAL SPECIFICATIONS Serial Interface (optional) When using the serial interface, the optional Serial-Parallel Converter must be connected to the printer. 4-1. General Specifications Item Specifications Interface RS-232C level Synchronization System Asynchronous Baud rate 150 - 19,200 bits per second (BPS) [selectable] 150, 300, 600, 1200, 2400, 4800, 9600, 19200 BPS Word length Start bit:...

  • Page 12: Dip Switch Settings

    GENERAL SPECIFICATIONS 4-3. DIP Switch Settings Switch 8 data bits 7 data bits No parity Parity checked Handshaking protocols – see table below Odd parity Even parity Data transfer rate – see table below All switches are set to ON before the printer leaves the factory. Protocol Switch 3 Switch 4...

  • Page 13: Ee-Prom Mode

    GENERAL SPECIFICATIONS EE-PROM mode 5-1. Outline These settings can be changed in the EE-PROM mode by writing data directly to the EE-PROM on the main logic board: • EDS (electric DIP switch) settings • Misalignment correction • Top margin in autoloading •...

  • Page 14: Ee-Prom Map

    Ink ribbon type Colour Monochrome *1 Fixed to uni-directional-for any other than 60DPI(F),80DPI(F). EDS setting (Function=LQ font selection) Font b0 b1 b2 b3 b4 b5 Font b0 b1 b2 b3 b4 b5 Roman Sanserif *2 Reserved *3 NX-2460C/2460=Reserved – 10 –...
  • Page 15 #865 Nordic #866 Russian #3840 IBM-Russian #3841 Gost-Russian #3843 Polish #3844 CS2 #3845 Hungarian #3846 Turkish #3847 Brazil-ABNT #3848 Brazil-ABICOMP 0 #852 Latin-2 *4 NX-2460C/2460=Reserved Bit Function Italic Enabled Disabled IBM Graphics #1 Enabled Disabled IBM Graphics #2 Enabled Disabled When the EDS setting is set to the EPSON mode, select Italic or IBM Graphics #2.
  • Page 16 GENERAL SPECIFICATIONS Address Function Factory data EDS setting Country b0 b1 b2 b3 Print Pitch b4 b5 b6 U.S.A 10cpi France 12cpi Germany 15cpi England 17cpi Denmark-1 20cpi Sweden Proportional Itary Spain-1 Zero character style b7 Japan Normal 0 Norway Slashed 0 Denmark-2 Spain-2...
  • Page 17 GENERAL SPECIFICATIONS Address Function Factory data EDS setting Bit Function Sleep mode 15 minutes Enabled Disabled Sleep mode 30 minutes Enabled Disabled Sleep mode disable Enabled Disabled Self Print Short Enabled Disabled Self Print Long Enabled Disabled HEX-dump Enabled Disabled EDS setting Bit Function Select latch timing...
  • Page 18 GENERAL SPECIFICATIONS The digit correction values can be set using the application on the host computer. Correction values ±0 -14 -13 -12 -11 -10 -2 -1 [1] [1] [1] [1] [1] [1] [1] [1] [1] [1] [1] [1] [1] [1] [1] [1] [1] [1] [1] [1] [1] [1] [1] [1] [1] [1] [1] [1] -14/720(inch) +14/720(inch) [1]1/720 (inch)

  • Page 19: Rewriting The Ee-Prom

    GENERAL SPECIFICATIONS 5-4. Rewriting the EE-PROM Follow this procedure to rewrite the EE-PROM. Turn the printer on. Load a BASIC disk in the computer. Turn the computer on. Set a sheet of paper in the printer, and press the PAPER switch. Enter the program listed below and run the program.
  • Page 20 GENERAL SPECIFICATIONS – 16 –...
  • Page 21 CHAPTER 2 THEORY OF OPERATION Block Diagram ..................... 19 Main Logic Board ....................20 2-1. Data Input Operation ..................... 2-1-1. Parallel Interface ....................2-1-2. Serial Interface (Option)..................2-2. General Flow Chart ....................2-2-1. Editing ........................ 2-2-2. Print Head Drive Circuit ..................2-2-3.

  • Page 22: Theory Of Operation

    THEORY OF OPERATION – 18 –...

  • Page 23: Block Diagram

    THEORY OF OPERATION Block Diagram The block diagram of this printer is shown in Fig. 2-1. Data (From Host Computer) Print head Parallel Carriage Driver interface motor Gate array Switch Masked Detectors Control 1M,2M panel board UVE-PROM Paper feed Driver 1M,512K motor EE-PROM...

  • Page 24: Main Logic Board

    THEORY OF OPERATION Main Logic Board 2-1. Data Input Operation 2-1-1. Parallel Interface Communications between the host computer and this printer are facilitated via parallel connectors. This section explains the handshake of this interface. The data input circuit of this interface is shown in Fig. 2-2. DATA 0 DATA 1 8 BIT...

  • Page 25: Serial Interface (Option)

    THEORY OF OPERATION 2.6ms 2.6ms Data STROBE (EDS G-1 : ON) STROBE (EDS G-1 : OFF) BUSY t : More than 0.5ms Fig. 2-3 Timing Chart of Parallel Interface 2-1-2. Serial Interface (option) When the serial interface is used, an optional serial-parallel converter is required to be installed. The converter will change ↔...
  • Page 26 THEORY OF OPERATION This printer employs 3 different transfer methods, which can be selected using the dip switches. (Refer to Chapter 1, 5-3 Setting Dip Switches) DTR method The DTR signal is considered a BUSY signal at the handshake, and when the data buffer capacity is 256 bytes or less, the DTR signal is given a marked status, meaning it cannot receive data.
  • Page 27 THEORY OF OPERATION DTR method DTR/RCH ON-Line Buffer [1] Near Full (when the empty area in the buffer becomes 256 bytes or less.) [2] Near Empty (when the empty area in the data buffer becomes 512 bytes or more.) method DTR/RCH ON-Line Buffer...

  • Page 28: General Flow Chart

    THEORY OF OPERATION 2-2. General Flow Chart The flow chart below shows you the general flow of editing and printing operations. POWER ON Initialization Ready state Read data Control code? Control code Data processing storage Print? (Line buffer determination) Data processing (Print out of data) or printing Return?

  • Page 29: Editing

    THEORY OF OPERATION 2-2-1. Editing Data stored in the RAM is read out sequentially by the CPU and then edited according to a function code that has been specified in advance. This editing takes places until the CR or CR + LF code appears or the line buffer becomes full. 2-2-2.
  • Page 30 THEORY OF OPERATION • Printing [1]When a High signal is received from the gate array, the transistor is turned on, then printing begins when power reaches the head solenoid HDI. [2]When the transistor is set to OFF, the energy stored in the HDI flows into M-GND through the Zener diode. VH(+25~45V) M-GND Fig.

  • Page 31: Print Head Temperature Detection Circuit

    THEORY OF OPERATION • Head Energizing Control Circuit The A/D converter with the internal CPU detects the Vh before printing each dot, then controls the head energising period according to the detected value. +25~45V (Normal mode) (First dot mode) (Silent mode) Head applied voltage VH (V) Fig.

  • Page 32: Carriage Motor Driving Circuit

    THEORY OF OPERATION 130 °C < T < 135 °C • Unidirectional printing starts. When the temparture falls below 130 °C, bi-derectional printing resumes. 135 °C • The current line is printed, then printing stops. When the thermistor’s temperature falls below 135 °C, unidirectional printing resumes.
  • Page 33 THEORY OF OPERATION ø1 ø2 ø3 ø4 From right to left From left to right 1-2 excitation method ø1 ø2 ø3 ø4 From right to left From left to right Double 1-2 excitation method Fig. 2-14 Excitation Method – 29 –...
  • Page 34 THEORY OF OPERATION There is a total of 13 drive patterns, listed in the table below. PRINTING MODE MAX. FREQUENCY EXCITATION MODE MAX. SPEED µ (PPS) TIMER ( [1]NORMAL DRAFT: 60 dpi 1920 [2]80 dpi 1440 [3]90 dpi 1280 [4]120 dpi 1042 [5]160 dip 1440...

  • Page 35: Carriage Motor Speed Control

    THEORY OF OPERATION 2-2-5. Carriage Motor Speed Control Since the carriage motor is a stepping motor, the carriage can be stopped at a desired position by controlling acceleration and deceleration. The carriage can also move backward. The rotational speed of the carriage motor is set by the number of pulses per time unit. The character pitch (horizontal character size) in each print mode is determined by changing this rotational speed (or carriage transfer speed).
  • Page 36 THEORY OF OPERATION Ø1 Ø2 Ø3 Ø4 Step Advance paper feed Reverse paper feed Fig. 2-16 Paper Feed Motor Excitation Method The utilization of voltage applied to the paper feed motor is described as follows. Mode Voltage Application Operation +25 ~ 45VDC Motor Drive Standby: +5VDC...

  • Page 37: Reset Circuit

    THEORY OF OPERATION 2-3. Reset Circuit The RESET signal initializes the circuit elements and prevents operation errors when the power is turned on. When the power is turned on, or while the RESET ( INPUT-PRIME ) signal is being output from the host computer, the RESET signal is output.

  • Page 38: Power Supply Circuit

    THEORY OF OPERATION Power Supply Circuit A ringing choke converter type circuit is used with a dropper type circuit in the power supply unit, fulfilling the input and output conditions described in the chart below. Voltage Range Max. Current Output Service Circuit Type 110, 120 VAC...

  • Page 39: Mechanisms

    THEORY OF OPERATION Mechanism 4-1. Print Head Mechanism 4-1-1. Character Mechanism The wiring arrangement of the guide section on the print head styles is depicted in Fig. 2-23. Odd- and even- numbered wires are arranged in two columns. This is a result of the necessity for laying adjacent dots on top of one another. Fig.

  • Page 40: Print Head Carrying Mechanism

    THEORY OF OPERATION 4-2. Print Head Carrying Mechanism The print head carrying mechanism consists of a carriage, timing belt, carriage motor, and home position detector. Carriage The carriage is supported horizontally by the carriage stay and rear angle. The carriage moves from side to side with the print head mounted above it.

  • Page 41: Ink Ribbon Feed Mechanism

    THEORY OF OPERATION 4-3. Ink ribbon feed mechanism The ink ribbon feed mechanism is linked to the print head carrying mechanism so the ink ribbon always winds automatically in the same direction while the carriage moves left and right. The movement of the carriage along the serrated edge of the rear angle of the printer mechanism drives the idler gear. The rotation of the idler gear is conveyed sequentially to the gears that work and wind the ribbon.

  • Page 42: Colour Switch Mechanism

    THEORY OF OPERATION 4-4. Colour switch mechanism The colour ink ribbon has four basic colours: black, cyan, magenta, yellow. Up to 7 colours can be obtained by combining these 4 colours. Colours which can be mixed (cyan, magenta, and yellow) are shown in the table below. The combined colours are divided into two parts, and then printed twice.

  • Page 43: Paper Feed Mechanism

    THEORY OF OPERATION 4-5. Paper Feed Mechanism The paper feed mechanism consists of a paper feed motor, an idler gear, a platen and a traction unit. The paper feed motor is a PM (Permanent Magnet) 4-phase and 48 pulse motor. There are two ways of feeding paper into the printer: the friction method and the tractor method.

  • Page 44: Detectors

    THEORY OF OPERATION 4-6. Detectors Print head temperature detectors The A/D converter in the CPU detects the print head temperature at power on and before each line begins to print. Printer head Thermistor Fig. 2-25 Printer head temperature detector circuit Control Method A/D Conversion Value AN Voltage...
  • Page 45 THEORY OF OPERATION Paper end Detector The paper end Detector is located in the paper chute unit. The A/D converter in the CPU detects the presence or absence of paper. Paper Fig. 2-27 Paper end detector circuit Control Method AN Voltage A/D Converter Detection POINT...
  • Page 46 THEORY OF OPERATION – 42 –...
  • Page 47 CHAPTER 3 ADJUSTMENTS ADJUSTMENTS This printer has undergone various adjustments so that it will attain a given standard of performance. In this chapter, a brief explanation is given of the methods for making adjustments. Follow the instructions when performing maintenance inspections or when replacing parts to correct malfunc- tions.
  • Page 48 ADJUSTMENTS – 44 –...
  • Page 49 ADJUSTMENTS Adjustment of Gap Between Print Head and Platen Remove the upper case unit according to the procedures described in Chapter 4. Remove the ribbon guide [1] and topguide unit [2]. (Fig. 3-1) Set the adjusting lever [3] to step two. (Fig. 3-3, 3-4) Remove the Stop ring [4].
  • Page 50 ADJUSTMENTS Adjustment of Timing Belt Tension The timing belt tension should be set to between 23 and 27 gf when printing in colour and to between 20 and 24 gf when printing in monochrome. (The belt tension must be measured with the designated tension gauge [3].) After the belt has been used for a long time, it may be difficult to maintain the prescribed tension because of belt deterioration or wear.
  • Page 51 ADJUSTMENTS Adjusting the shift position of the colour ink ribbon cartridge Adjust the shift position if during the colour printing mode you see mixed colour at the upper or lower edges of printed characters. Remove the ink ribbon cartridge and check to see if the shift cam follower, installed on the cassette holder [1], is positioned at 3.
  • Page 52 ADJUSTMENTS – 48 –...
  • Page 53 CHAPTER 4 PARTS REPLACEMENT This chapter explains disassembly and reassembly of the printer. Note the following regarding disassembly and reassembly. 1. Assembly is the reverse of disassembly unless otherwise specified. 2. After reassembly, coat the screw heads with locking sealant. 3.
  • Page 54 PARTS REPLACEMENT – 50 –...

  • Page 55: Parts Replacement

    PARTS REPLACEMENT Upper Case Unit Center the carriage unit. Remove • 4 tapping screws [2] • Upper case unit [1] • Control board [3] Printer Mechanism Remove • Upper case unit according to the procedure described in item 1. • Cable holder [1] •...

  • Page 56: Main Logic Board

    PARTS REPLACEMENT Main Logic Board Remove • Printer mechanism according to the procedure described in item 2. Raise the Stopper • 1 connector [1] (see the illustration (A) on the left) Upwards • Home position board [2] (For the Colour model only.) •...

  • Page 57: Print Head

    PARTS REPLACEMENT Print Head Remove • Upper case unit according to the procedure de- scribed in item 1. • Cable holder [1] • Color ribbon holder assy [2] (For the Colour model only.) • 2 tapping screws [3] • 2 head cable [5] •...

  • Page 58: Platen Unit

    PARTS REPLACEMENT Platen Unit Remove • Upper case unit according to the procedure described in item 1. • Top guide unit [1] • Stack guide unit [2] The stack guide unit may break if it is forcibly removed. Therefore, hold the gears tightly when removing the stack guide unit.
  • Page 59 CHAPTER 5 MAINTENANCE AND LUBRICATION Maintenance ......................57 1-1. Cleaning ......................... 1-2. Checks ........................Lubrication ......................58 2-1. Lubricant ........................ 2-2. Lubricating Method ....................Lubricated Areas ....................This printer does not have a power switch. Even if the LED is off, unplug the power cord to turn the printer off.
  • Page 60 – 56 –...

  • Page 61: Maintenance And Lubrication

    MAINTENANCE AND LUBRICATION Maintenance In order to maintain optimum performance and prevent problems, the following maintenance procedures must be carried out. 1-1. Cleaning Removal of dirt Wipe off dirt with a soft cloth soaked in alcohol or benzine. *Note: Do not use thinner, trichlene or ketone solvents because they may damage plastic parts. Also, during cleaning be careful not to moisten or damage electronic parts, wiring, or mechanical parts.

  • Page 62: Lubrication

    MAINTENANCE AND LUBRICATION Lubrication Lubrication is very important to maintain optimum performance and to prevent problems. 2-1. Lubricant The type of lubricant greatly affects the performance and durability of the printer, especially in a low temperature environment. We recommend use of the grease and lubrication oils listed below for this printer Product name Maker FLOIL GB-TS-0 and FIOIL G-31SA...
  • Page 63 MAINTENANCE AND LUBRICATION Fig. 5-1 Lubricated Areas (printer mechanism) – 59 –...
  • Page 64 MAINTENANCE AND LUBRICATION [11] [14] [12] [13] [13] [13] [13] [13] Point of Contact between The Gears and The Shift Cover [12] MAX 0.5 [13] [11] Do not Apply Lubrication Rear of Gear Cover Fig. 5-2 Lubricated Areas (Carriage unit monochrome) [17] [22] [17]...
  • Page 65 MAINTENANCE AND LUBRICATION [24] [24] Push [25] Tractor Frame (L) Fig. 5-4 Lubricated Areas (Push tractor unit) [27] [27] [28] Areas to Lubricate [27] [26] [27] [26] Fig. 5-5 Lubricated Areas (ASF Frame unit) – 61 –...
  • Page 66 – 62 –...
  • Page 67 TROUBLESHOOTING CHAPTER 6 TROUBLESHOOTING Troubleshooting Procedures ................Unit Replacement Priority Chart ................ Repair by Unit Replacement ................Repair by Parts Replacement ................4-1. No Operation at All when Power on ..............73 4-2. Power Supply Circuit Abnormal ................74 4-3. Defective Motor Operation ...................

  • Page 68: Chapter 6 Troubleshooting

    TROUBLESHOOTING – 64 –...

  • Page 69: Troubleshooting

    TROUBLESHOOTING Troubleshooting Procedures Troubleshooting is never easy because different problems arise according to when the particular location of the breakdown. The following procedures should be used when making repairs. The first method is to make repairs by unit replacement. The two display codes appearing in the flow chart are defined as follows: 1) indicates main logic board replacement;...

  • Page 70: Unit Replacement Priority Chart

    TROUBLESHOOTING Unit Replacement Priority Chart Unit Exchange Sequence Problem Remarks Category Power Main Printer Details supply unit logic board mechanism Specific display lamp will not glow Specific switch cannot be input Buzzer does not sound (sound volume inadequate) Strange sounds during operation No motor holding power...

  • Page 71: Repair By Unit Replacement

    TROUBLESHOOTING Repair by Unit Replacement START * Sleep mode * Remove the power supply plug from the socket. * Remove I/F cable. * Mount ink ribbon. * Set paper. * Move carriage to center. Turn power on. Insert the power supply plug into the socket.
  • Page 72 TROUBLESHOOTING READY lamp lights? Press READY switch to take Replace main logic board. printer off line. READY lamp is out? Press PAPER switch. Replace main logic board. PAPER switch *2 See waveforms (6) and (7) operation is normal? under item 10 of Chapter 7. Paper feed motor drive waveform is normal? *2...
  • Page 73 TROUBLESHOOTING Printing operation *3 See waveforms (3) and (4) is normal? under item 10 of Chapter 7. Print head drive signal waveform is normal? *3 1) Replace main logic board. 2) Replace printer mechanism. Replace printer mechanism. Paper feed operation is *2 See waveforms (6) and (7) normal? under item 10 of Chapter 7.
  • Page 74 TROUBLESHOOTING Printing begins? Printing operation normal? 1) Replace I/F cable. Stop print program. 2) Replace main logic board. 3) Check host computer. Carriage can be moved by hand? Replace printer mechanism. Output (25~45V, +5V) of power supply unit is normal? *4 1) Replace main logic board.
  • Page 75 TROUBLESHOOTING Output of power supply unit is normal? *4 Turn power off. Replace power supply unit. 1) Sleep mode 2) Remove the power supply plug from the socket. Connect connector CN3 from main logic board. 1) Insert the power supply plug into the socket.
  • Page 76 TROUBLESHOOTING *5 See waveforms (8) under item 10 of Chapter 7. I/F signal is normal? *5 Ready condition? There is data transmission? Check hardware or host I/F mode set computer print program. up properly? 1) Replace I/F cable. 2) Replace main logic board. Change I/F mode.

  • Page 77: Repair By Parts Replacement

    TROUBLESHOOTING Repair by Parts Replacement 4-1. No Operation at All when Power on START 25~45V, +5V supplied? *1 See 4-2. Power Supply DC power abnormal. Circuit Abnormal. RESET signal becomes HIGH? *2 Check RESET circuit; replace parts. Crystal waveform is normal? *3 Check crystal circuit;...

  • Page 78: Power Supply Circuit Abnormal

    TROUBLESHOOTING 4-2. Power Supply Circuit Abnormal Remove connector CN3 from the main logic board. START Fuse F2 on the fuse board is blown? Replace fuse F2 Fuse is blown again? Replace 1) DB2 2) C107 Fuse F1 on the fuse board is blown? Replace fuse F1 Fuse is...

  • Page 79: Defective Motor Operation

    TROUBLESHOOTING 4-3. Defective Motor Operation START START LF-CMN CR-ø1, signal is normal? ø2, ø3, ø4 are normal? *6 Check and replace Check and replace 1) TR2 1) TA8 2) TR1 2) Gate Array 3) Gate Array LF-ø1, ø2, ø3, ø4 are normal? *5 Check and replace 1) TA1...

  • Page 80: Defective Print Head Operation

    TROUBLESHOOTING 4-4. Defective Print Head Operation START Does not print at all? A specific pin does not 25~45V line is work? Check and replace supplied? HD1: TA6 HD2: TA2 HD3: TA6 HD4: TA2 Power supply HD5: TA6 unit abnormal. HD6: TA4 (Refer to item 4-2.) HD7: TA7 HD8: TA4...

  • Page 81: Defective Interface Operation

    TROUBLESHOOTING 4-5. Defective Interface Operation START Press READY switch to put printer on line. Send print program from host computer. *8 See waveform (8) under item 9 of Chapter 7. Is I/F signal normal? *8 Incorrect print-out generated? Check I/F cable. Check and replace 1) Gate array 2) CPU...
  • Page 82 TROUBLESHOOTING – 78 –...
  • Page 83 CHAPTER 7 PARTS LIST HOW TO USE PARTS LIST DRWG. NO. This column shows the drawing number of the illustration. REVISED EDITION MARK This column shows a revision number. Part that have been added in the revised edition are indicated with “#”. Part that have been abolished in the revised edition are indicated with “*”.

  • Page 84: Printer Assembly

    Printer Assembly 1-1. Disassembly Drawing – 80 –...

  • Page 85: Parts List

    EXCEPT FOR US:OPTION 83025980 HALL CAP HBA-10 87810380 UPPER CASE UNIT HBA-10(D) 82902561 RIBBON HOLDER 82902562 RIBBON HOLDER 80995010 CABLE HOLDER 80087950 OPERATION SHEET NX-2460C FOR US,TW 80087960 OPERATION SHEET LC-240C FOR EC,UK,AS 80087920 OPERATION SHEET NX-2460 FOR TW,HK 80087940 OPERATION SHEET...
  • Page 86 Printer Assembly Q'TY DRWG.NO. REV. PARTS NO. PARTS NAME REMARKS RANK REF.NO(D) 89512050 RIBBON CASSETTE WHT Y24CL EXCEPT FOR TW 89512050 RIBBON CASSETTE WHT Y24CL EXCEPT FOR TW,HK 89511350 RIBBON CASSETTE JAN FOR EC,UK :OPTION 89511370 RIBBON CASSETTE SMH FOR TW (HK:OPTION) 87510680 RIBBON CASSETTE FOR EC,UK,HK 89511380 RIBBON CASSETTE TWN...

  • Page 87: Printer Mechanism

    Printer Mechanism 2-1 Disassembly Drawing – 83 –...

  • Page 88: Parts List

    2-2. Parts List Printer Mechanism Q'TY DRWG.NO. REV. PARTS NO. PARTS NAME REMARKS RANK CL MO 87420500 FRAME BASE ASSY 87420400 CARRIAGE MOTOR ASSY 87420510 CARRIAGE MOTOR ASSY 87427030 TENSION LEVER UNIT 87424050 PAPER CHUTE UNIT 82091580 REAR ANGLE 83000112 FRAME R 83401281 ADJUSTING LEVER...

  • Page 89: Sub-Assembly

    Sub-assembly 3-1. Lower Case Unit DRWG.NO. REV. PARTS NO. PARTS NAME Q’TY REMARKS RANK 83025961 LOWER CASE HBA-10 82011600 LOWER CASE CHASSIS HBA-10 02010401 HEXAGON NUT NH4-1 80994580 RUBBER FOOT 15X15 QBS-10 – 85 –...

  • Page 90: Asf Frame Unit

    3-2. ASF Frame Unit 6-13 6-12 6-15 6-11 6-10 6-14 DRWG.NO. REV. PARTS NO. PARTS NAME Q’TY REMARKS RANK 83000131 ASF FRAME 83000132 ASF FRAME 83904381 ADJUSTER R 83904391 ADJUSTER L 87426370 HOPPER PLATE ASSY 87426380 FEED ROLLER SHAFT ASSY 83904341 MANUAL FEED GUIDE 82501451 PINCH ROLLER SPRING 82501452 PINCH ROLLER SPRING...

  • Page 91: Push Tractor Unit (Optional)

    3-3. Push Tractor Unit (Optional) 7-13 7-11 7-15 7-12 7-14 7-16 7-10 7-14 7-20 7-18 7-19 7-12 7-17 7-15 DRWG.NO. REV. PARTS NO. PARTS NAME Q’TY REMARKS RANK 83000141 TRACTOR FRAME R 83000151 TRACTOR FRAME L 83401290 TRACTOR LOCK LEVER R 83401300 TRACTOR LOCK LEVER L 81361000 TRACTOR SHAFT 81371070 TRACTOR STAY...

  • Page 92: Serial-Parallel Converter (Optional)

    3-4. Serial-Parallel Converter (Optional) DRWG.NO. REV. PARTS NO. PARTS NAME Q’TY REMARKS RANK 83024060 UPPER CASE SPC-8K 87590010 CPU BOARD UNIT SPC-8K 87590020 IF BOARD UNIT SPC-8K 87591020 LOWER CASE UNIT SPC-8K 82901600 CORD HOLDER SPC-8K 01903047 SCREW TAT 3-12 PT-FL 01903060 SCREW TAT 3-8 PT-FL 82902150 CORD HOLDER PLATE SPC-8K...

  • Page 93: Paper Chute Unit

    3-5. Paper Chute Unit DRWG.NO. REV. PARTS NO. PARTS NAME Q’TY REMARKS RANK 80995001 SUB-GUIDE 80995002 SUB-GUIDE 83912271 PAPER CHUTE 87424350 CABLE UNIT 87424360 ROLLER HOLDER ASSY 87424361 ROLLER HOLDER ASSY – 89 –...

  • Page 94: Carriage Unit (Monochrome)

    3-6. Carriage Unit (Monochrome) 11-8 11-5 11-7 11-6 11-12 11-11 11-4 11-10 11-3 11-9 11-1 10-1 11-2 DRWG.NO. REV. PARTS NO. PARTS NAME Q’TY REMARKS RANK 11-1 87422540 CARRIAGE ASSY 11-2 80902210 TIMING BELT HTD102 357X3.2 11-3 83120720 RIBBON CASSETTE GEAR 11-4 87422510 IDLER GEAR ASSY 11-5...

  • Page 95: Carriage Unit (Color)

    3-7. Carriage Unit (Color) 11-11 11-14 11-13 11-12 11-21 11-15 11-19 11-5 11-17 11-7 11-8 11-16 11-10 11-9 11-20 11-18 11-6 11-1 11-3 11-4 11-2 DRWG.NO. REV. PARTS NO. PARTS NAME Q’TY REMARKS RANK 11-1 87422550 CARRIAGE ASSY 721CL 11-2 80902070 TIMZING BELT HTD102 357X4.8 11-3 83290140 SHIFT CAM...

  • Page 96: Platen Unit

    3-8. Platen Unit (14-4) 14-7 14-1 14-8 14-3 14-2 14-4 14-6 14-5 DRWG.NO. REV. PARTS NO. PARTS NAME Q’TY REMARKS RANK 14-1 80202271 PLATEN 80202272 PLATEN 14-2 83401311 ASF CLUTCH LEVER 14-3 83101750 CLUTCH IDLER GEAR B 14-4 83904411 PLATEN HOLDER 83904412 PLATEN HOLDER TO PRINTER MECHANISM 14-5...

  • Page 97: Wiring Scheme Of Printer

    Wiring Scheme of Printer – 93 –...

  • Page 98: Main Logic Board

    Main Logic Board 5-1. Circuit Diagram SIDE A – 94 –...
  • Page 99 SIDE B – 95 –...

  • Page 100: Component Layout

    5-2. Component Layout SIDE A – 96 –...
  • Page 101 SIDE B – 97 –...

  • Page 102: Parts List

    5-3. Parts List Main Logic Board DRWG.NO. REV. PARTS NO. PARTS NAME Q’TY REMARKS RANK CL MO 08221044 PSRAM HM65256BLSP-100 09110077 IC SOCKET ICS-32-2T FOR NX 08222017 EPROM D27C1001D-150NS HBAUS(CL)*.* FOR NX 08223242 MASKED ROM 3.0 HBA-10US FOR NX 08223252 MASKED ROM 3.0 HBA-10USCL FOR NX...
  • Page 103 Main Logic Board DRWG.NO. REV. PARTS NO. PARTS NAME Q’TY REMARKS RANK CL MO C47-49 05152234 CERA. CAPA. 0.022UF 50V C50-51 05154714 CERA. CAPA. 470PF 05191034 CERA. CAPA. 0.01UF 250V FOR HK ONLY 05191033 CERA. CAPA. 0.01UF 250V FOR HK ONLY CA1-2 NOT MOUNTED 06051025...
  • Page 104 Main Logic Board DRWG.NO. REV. PARTS NO. PARTS NAME Q’TY REMARKS RANK CL MO CN8-2 87775051 WIRE 28UL1007WHT330 RELEASE LEVER SW CN8-3,4 09090056 LEAF SWITCH LSA-1115-R3 FOR MONOCHROME CN8-3 87775061 WIRE 28UL1007GRY175 FOR MONOCHROME CN8-4 87775061 WIRE 28UL1007GRY175 FOR MONOCHROME CN9,12 80705441 FLAT CABLE 3X69...

  • Page 105: Power Supply Unit

    Power Supply Unit 6-1. Circuit Diagram 6-2. Component Layout – 101 –...

  • Page 106: Parts List

    6-3. Parts List Power Supply Unit DRWG.NO. REV. PARTS NO. PARTS NAME Q’TY REMARKS RANK C101-103 NOT MONTED C104 05191025 CERA. CAPA. 1000PF 400V EXCEPT FOR HK C105 05191025 CERA. CAPA. 1000PF 400V EXCEPT FOR HK C106 05024781 CHEM. CAPA. 4700UF C107 05054782 CHEM.

  • Page 107: Control Panel Board

    Control Panel Board 7-1. Circuit Diagram 7-2. Component Layout 7-3. Parts List DRWG.NO. REV. PARTS NO. PARTS NAME Q’TY REMARKS RANK SW1-2 09010041 PUSH SWITCH SKHHAL SW-PCB LED1 08300151 LED LTL232 SW-PCB Home Position Board (Colour) 8-1. Component Layout 8-2. Parts List DRWG.NO.

  • Page 108: Serial-Parallel Converter Board

    Serial-Parallel Converter Board (Option) 9-1. Wiring Scheme – 104 –...

  • Page 109: I/F Board

    9-2. I/F Board 9-2-1. Circuit Diagram 9-2-2. Component Layout 9-2-3. Parts List DRWG.NO. REV. PARTS NO. PARTS NAME Q’TY REMARKS RANK IC101 08200125 IC-I/F LT1081CN IC102 08200109 IC-RESET M51953BL R101 06053324 RD RESISTOR 3.3 K-OHM 1/6W C101-104 05034758 CHEM. CAPA. 4.7UF C105 05551044 CAPACITOR 0.1UF 50V...

  • Page 110: Cpu Board

    9-3. CPU Board 9-3-1. Circuit Diagram – 106 –...

  • Page 111: Component Layout

    9-3-2. Component Layout 9-3-3. Parts List CPU Board DRWG.NO. REV. PARTS NO. PARTS NAME Q’TY REMARKS RANK 08250011 MASKED CPU HD63B01YF-IF 08221021 SRAM HM6264LFP-100NS 07603007 DIGITAL TRANSISTOR RTIN434C-T 06754721 CHIP RESISTOR 4.7 K-OHM 1/10W R2-4 06751021 CHIP RESISTOR 1 K-OHM 1/10W 06754721 CHIP RESISTOR 4.7 K-OHM 1/10W R6-7 06783313 CHIP RESISTOR 330 OHM 1/8W...

  • Page 112: Waveform With Oscilloscope

    10. Waveform with Oscilloscope (1) Crystal (12 MHz) (2) RESET (Power on reset) (4V) (4V) (0V) (4V) (0V) (0V) Crystal Pin 34 of IC6 Upper : RESET input Pin 1 of IC8 Time/Div : 0.2 µs Lower : RESET output Pin 3 of IC8 Volt/Div : 1V...
  • Page 113 (7) Paper Feed Motor Control Signal and (8) Parallel Interface Driving Signal (5V) (5V) (0V) (0V) (80V) (4V) (0V) (0V) Upper : LF-ø1 Control Signal Pin 70 of IC6 Upper : STB Pin 1 of CN1 Lower : LF-ø1 Driving Signal Pin 3 of CN7 Lower : BUSY Pin 11 of CN1...

  • Page 115: Japan

    STAR MICRONICS U.K.LTD. HEAD QUARTERS OVERSEAS SUBSIDIARY COMPANIES STAR MICRONICS DEUTSCHLAND GMBH STAR MICRONICS CO., LTD. JAPAN STAR MICRONICS AMERICA INC. Star House, Peregrine Business Westerbachstraße 59 P.O.Box 940330 D-60489 Frankfurt/Main 90 Park, Gomm Road, High Wycombe 536 Nanatsushinya, Shimizu, 70-D Ethel Road West.

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Nx-2460Lc-240Lc-240c

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