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Microline 393 / 393C-Plus
Service Handbook
P/N 59241602

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  • Page 1 Microline 393 / 393C-Plus Service Handbook P/N 59241602...
  • Page 3 Microline 393 / 393C-Plus Service Handbook...
  • Page 4 Electric Industry Company, Ltd. Centronics is a registered trademark of Centronics Inc. PLUG ’n PRINT is a registered trademark of Oki America, Inc.; marque deposee de Oki America, Inc. Epson is a registered trademark of Seiko Epson Corporation. IBM, Proprinter and Proprinter XL are registered trademarks of International Business Machines, Inc.
  • Page 5: Table Of Contents

    Table of Contents COURSE ADMINISTRATION: OVERVIEW ..........................i-1 RECOMMENDATIONS ......................i-2 INFORMATION UPDATES......................i-3 NOTICES............................i-3 WHERE TO SEND TESTING MATERIALS ................i-4 MISSING ITEMS OR MISSING PAGES..................i-5 COURSE PATH ........................... i-6 SERVICE TRAINING........................i-7 SERVICE AUTHORIZATION ....................i-11 General Information......................
  • Page 6 AGENCY APPROVALS....................1-5 1.5.01 Listings......................1-5 OPERATIONAL SPECIFICATIONS ................1-6 1.6.01 Character Matrix Sizes..................1-6 Table of Print Speed and Character Matrix ............... 1-6 1.6.02 Characters Per Line................... 1-6 1.6.03 Character Pitches ....................1-6 1.6.04 Character Sets ....................1-7 1.6.05 Emulations ......................
  • Page 7 Cut Sheet........................1-15 Envelopes......................... 1-15 Labels........................1-16 Transparency......................1-16 1.7.02 Length ......................1-17 1.7.03 Number of Copies ................... 1-17 1.7.04 Thickness ......................1-17 1.7.05 Weight......................1-18 1.7.06 Width....................... 1-18 Paper ........................1-18 MEMORY SPECIFICATIONS..................1-19 1.8.01 ROM ....................... 1-19 1.8.02 RAM .......................
  • Page 8 2.1.02 Microprocessors (MPUs) and Peripheral Circuits ..........2-1 Microprocessors (Q16: 83C154UGS and Q11: 80C154VGS) ........2-1 Program ROM for Master MPU (Q6: 27512)............2-1 Program ROM for Slave MPU (Q17: 2764).............. 2-1 DRAM (Q18 and Q19) ....................2-1 CGROM (Q7) ......................2-1 EEPROM (Q20)......................
  • Page 9 Bottom Feed Paper-End................... 2-17 Rear Feed Paper-End ....................2-17 2.2.06 Paper Park ....................... 2-18 General Information....................2-18 Procedure: Continuous Feed to Single Sheet............2-19 Procedure: Single Sheet to Continuous Feed............2-19 2.2.07 Automatic Paper Loading ................2-20 Cut-Sheet Paper ....................... 2-20 Continuous Sheet (Rear Feed) SASF...............
  • Page 10 Parts List ........................3-44 3.2.19 Paper Pressure Guide ..................3-46 3.2.20 Printhead Gap / Release Lever Microswitches ..........3-48 3.2.21 Push Tractor Assembly ................... 3-50 Procedure - Disassembly..................3-50 Procedure - Installation Notes.................. 3-52 Parts List ........................3-52 3.2.22 Power Supply Unit..................3-54 Microline 393C-Plus - Color Model Only .................
  • Page 11 Sample Menu ......................3-93 Menu Settings ......................3-94 Menu Reset ......................3-96 Limited Operation....................3-97 General Information................... 3-97 Procedure ......................3-97 3.3.07 Top of Form ....................3-99 General Information....................3-99 Procedure: Setting Top of Form................3-99 3.3.08 Paper Park ..................... 3-100 General Information....................
  • Page 12 4.1.01 Introduction....................... 4-1 4.1.02 Printer Serial Number Identification..............4-2 4.1.03 Firmware Revision Level Identification ............4-2 Header ........................4-2 REPORTING PROBLEMS ..................... 4-3 4.2.01 General Information..................4-3 4.2.02 Problem Lists ....................4-3 4.2.03 Reporting Methods.................... 4-4 Okilink II........................4-4 Course Critique ......................4-4 Fax Number .......................
  • Page 13 Drifting Margin ....................4-23 FAULT ALARMS ......................4-24 4.6.01 General Information..................4-24 Alarm Codes Table ....................4-25 REPAIR ANALYSIS PROCEDURES (RAPs)............. 4-27 4.7.01 Using the RAPs....................4-27 4.7.02 RAP Index....................... 4-27 RAP 01: Power Lamp Does Not Light ..............4-28 RAP 02: Space Error (ALARM 57).................
  • Page 14 Commonly Used Serial Cable Configurations............4-55 IBM 25-Pin Cable Configuration............... 4-55 IBM 9-Pin Cable Configuration................. 4-55 4.8.05 Hexadecimal Dump ..................4-56 General Information....................4-56 Example ........................4-56 Procedure ......................... 4-56 Sample........................4-57 RESISTANCE CHECKS....................4-58 4.9.01 General Information..................4-58 4.9.02 Printhead Resistance Check................
  • Page 15 RSPL ..........................B-4 Technical Service Bulletins ..................B-5 B.1.03 Parts Ordering Information ................B-6 Service Center Reference Guide ................B-6 Placing a Parts Order ....................B-7 CHARTS..........................B-9 B.2.01 Printer Unit......................B-10 B.2.02 Upper Cover Assembly...................B-12 B.2.03 Printer Unit General Assembly (1 of 2) ............B-14 B.2.04 Printer Unit General Assembly (2 of 2) ............B-16 B.2.05 Operator Panel Assembly ................B-18 B.2.06...
  • Page 16 PAPER SPECIFICATIONS ....................C-4 C.3.01 Types.........................C-4 C.3.02 Weight.......................C-4 C.3.03 Number of Copies .....................C-4 PHYSICAL SPECIFICATIONS ..................C-4 C.4.01 Printer Dimensions....................C-4 C.4.02 Printer Weight....................C-4 POWER REQUIREMENTS....................C-5 C.5.01 Input Power.......................C-5 C.5.02 Power Consumption..................C-5 ENVIRONMENTAL CONDITIONS................C-5 C.6.01 Ambient Temperature and Relative Humidity..........C-5 C.6.02 Printer Noise Level (10 cpi - LQ Mode)............C-5 AGENCY APPROVALS....................C-6 C.7.01 Listings......................C-6...
  • Page 17: Course Administration

    COURSE ADMINISTRATION...
  • Page 19: Overview

    OVERVIEW Okidata developed this course in order to provide the information necessary to install and maintain the Microline 393-Plus and Microline 393C-Plus printers. Upon successful completion of this training course, you will be able to do the following. Install and operate the product Locate the major assemblies of the product Identify fault indications Perform corrective and preventive maintenance...
  • Page 20: Recommendations

    RECOMMENDATIONS Prerequisites Before beginning this course, you should know the following concepts. Have an understanding of basic electronics Be familiar with electrostatic principles Be familiar with dot matrix technology and protocol Be familiar with the proper procedures for handling circuit boards, Read Only Memory (ROM), and Random Access Memory (RAM) Be able to use basic tools Be able to use a digital multimeter (DMM)
  • Page 21: Information Updates

    INFORMATION UPDATES Every effort has been made to ensure the accuracy of the information contained in this training course. Okidata is not responsible for errors beyond its control. Technical updates are made available to authorized Service Centers through the Technical Service Bulletins (TSBs / Okidata’s Monthly Technical Mail).
  • Page 22: Where To Send Testing Materials

    WHERE TO SEND TESTING MATERIALS Refer to the Okidata Service Center Reference Guide for where to send the test materials. The Okidata Service Center Reference Guide is sent to your dealership along with the Okidata Service Contract materials. It is available from Okidata Dealer Service. It is also available through Okilink II.
  • Page 23 MISSING ITEMS OR MISSING PAGES Missing Items When you receive the training kit, you MUST verify that the kit contains the items listed on the Read Me First sheet. If any items are missing, please contact Okidata’s Order Processing Center at the appropriate number listed below.
  • Page 24: Course Path

    COURSE PATH This Course Administration directs you through the training package. Each section covers a different part of the training. Tasks within each section direct you to the portions of the training materials that cover the subject you are studying. When you have completed one section, move on to the next.
  • Page 25: Service Training

    SERVICE TRAINING Requirements You will need the following items. Service Center Reference Guide Service Handbook User’s Documentation (Setup Guide, Reference Guide) Service Videotape Video Cassette Player Video Monitor Service Training is divided into the following six sections. General Description Installation Principles of Operation Failure Analysis Appendices...
  • Page 26 General Description This section describes the features and specifications of the printers. Assigned Tasks Read Section 1 of the Service Handbook. Installation In this section, you will install the unit. You will also perform various tests. Assigned Tasks Read the Setup Guide. Look through the Reference Guide.
  • Page 27 Failure Analysis This section covers the methods used to identify and correct problems with the unit. Assigned Tasks Read Section 4 of the Service Handbook. Study the Board Diagrams in Appendix A of the Service Handbook. Check Okilink II for additional troubleshooting information. Refer to the Service Center Reference Guide for information on accessing Okilink II.
  • Page 28 Maintenance Disassembly / Assembly Assigned Tasks Read Section 3.2 of the Service Handbook. CAUTION: Okidata does not recommend performing the disassembly / assembly procedures on a product which is operating normally. Therefore, you are not required to perform the disassembly / assembly procedures to complete this training. Adjustments and Service Checks This section explains the adjustments performed after parts replacement.
  • Page 29: Service Authorization

    SERVICE AUTHORIZATION General Information Read through the instructions for completing the testing process before you begin. This section contains the Answer Sheet, Certification Test, and Course Critique for this service training package. These are the only copies of these items you will receive. DO NOT WRITE ON THESE ITEMS! PHOTOCOPY EACH ITEM! Use the photocopies to complete the testing process.
  • Page 30 Certification Test Requirements You must achieve a score of 80% or greater on your Certification Test to successfully complete this course. You will need the following items. Service Handbook User’s Documentation #2 Lead Pencil Assigned Tasks Read through all instructions BEFORE completing the testing process. Photocopy the Certification Test and Answer Sheet provided in this kit.
  • Page 31: Answer Sheet: Microline 393/393C-Plus

    Answer Sheet: Microline 393/393C-Plus Dealer Code: Today’s Date: Technician’s Name: Company: Company’s Address: City: State/Province: Zip/Postal Code: Country: Phone #: Fax #: If your Dealership uses Okilink II, please provide your Dealership’s Login Name. First: Last: Microline 393 / 393C-Plus i - 13 Course Administration Service Handbook P/N 59241602...
  • Page 32: Course Critique: Microline 393/393C-Plus

    Course Critique: Microline 393/393C-Plus Dealer Code: Today’s Date: Technician’s Name: Company: Company’s Address: City: State/Province: Zip/Postal Code: Country: Phone #: Fax #: Have you completed other Okidata Self-Study Service Training packages? Please rate this course. Excellent Below Average Above Average Poor Average Does your Dealership use Okilink II?
  • Page 33 Comments Microline 393 / 393C-Plus i - 15 Course Administration Service Handbook P/N 59241602...
  • Page 34: Certification Test: Microline 393/393C-Plus

    Certification Test: Microline 393/393C-Plus A blinking ALARM lamp may be caused by an open bail arm, jammed paper, a printhead that cannot move, or other fatal errors. True False Correct Answer: A Page 45, Setup Guide Page 4-2, Service Handbook Rev 01 Page 4-7, Service Handbook Rev 02 To configure a Microline 393-Plus printer from a parallel interface to a serial interface, remove the parallel interface.
  • Page 35 When installing the upper cover assembly, the bail arm lever should be towards the back of the printer and the paper release lever should be towards the front. True False Correct Answer: A Page 3-10, Service Handbook Rev 01 Page 3-12, Service Handbook Rev 02 When installing the space belt, make sure that the belt clamp is installed with its ribbed side facing down.
  • Page 36 An incorrect printhead gap adjustment can cause which of the following? Poor print quality Uneven print quality Excessive wear on the printhead or platen All of the above Correct Answer: D Video, Kits 01 and 02 Page 3-83, Service Handbook Rev 02 The Microline 393-Plus Printer has 32K Resident RAM with an optional 64K RAM cartridge optional.
  • Page 37 Jumper SP3 is OPEN on the main control board of a Microline 393C-Plus Color Printer. True False Correct Answer: B Page A-1 , Service Handbook Rev 01 Pages 3-18 and A-4, Service Handbook Rev 02 To reset the Microline 393-Plus menu to its factory settings, press and hold __________ while powering ON the printer.
  • Page 38 You have installed the push tractor assembly. The upper center guide moves easily along the locking shaft. Use a standard screwdriver to rotate the friction piece in the upper center guide 45 degrees. True False Correct Answer: A Page 3-38, Service Handbook Rev 01 Page 3-52, Service Handbook Rev 02 When performing the color adjustment on the Microline 393C-Plus, the top of the ribbon guide must be __________ the top of the ribbon guide post.
  • Page 39 The ALARM lamp is flashing. In the PRINT QUALITY area, the LQ and UTL lamps are lit. In the CHARACTER PITCH area, the 17 and 20 lamps are lit. What is the error? Head Homing Error EEPROM Write Error Spacing Error Ribbon Error.
  • Page 40 Before performing any disassembly procedures, you should power off the printer. True False Correct Answer: A Page 3-1, Service Handbook Rev 01 Pages 3-2 and 3-6, Service Handbook Rev 02 When the printer is in MENU MODE, the functions shown below the switches on the operator panel are active.
  • Page 41: Section One: Specifications

    SECTION ONE SPECIFICATIONS...
  • Page 43: Overview

    OVERVIEW 1.1.01 General Information The Microline 393-Plus and Microline 393C-Plus are high speed, dot matrix printers, which utilize a 24 pin printhead. The Microline 393-Plus is the standard version (monochrome). The Microline 393C-Plus is the color capable version. The printers are capable of emulating the Epson LQ-2550 and the IBM Proprinter XL24 printers.
  • Page 44: Physical Specifications

    PHYSICAL SPECIFICATIONS 1.2.01 Dimensions NOTE: Dimensions INCLUDE the platen knob, acoustic cover, and paper separator. Width: 25.2 inches (54 centimeters) Depth: 19 inches (48.3 centimeters) Height: 8 inches (20.3 centimeters) 1.2.02 Printer Weight 37 pounds (16.8 kilograms) UPS Shippable Specifications 1 - 2 Microline 393 / 393C-Plus Service Handbook P/N 59241602...
  • Page 45: Power Requirements

    POWER REQUIREMENTS 1.3.01 Input Power 120 VAC: +10 / -15% 220 VAC: +10 / -15% 1.3.02 Power Consumption Operating: 180 VA Idle: 50 VA 1.3.03 Power Frequency 50/60 Hz +/- 2% Microline 393 / 393C-Plus 1 - 3 Specifications Service Handbook P/N 59241602...
  • Page 46: Environmental Conditions

    ENVIRONMENTAL CONDITIONS 1.4.01 Acoustic Rating Letter Quality Mode 58 dBA Quiet Mode 54 dBA 1.4.02 Altitude 10,000 feet (3,048 meters) 1.4.03 Ambient Temperature and Relative Humidity (RH) While operating: 41 to 104 degrees Fahrenheit (5 to 40 degrees Celsius) Operating humidity: 20% to 90% RH While in storage: -40 to 158 degrees Fahrenheit ( - 40 to 70 degrees Celsius) Storage humidity: 5% to 95% RH Specifications...
  • Page 47: Agency Approvals

    AGENCY APPROVALS 1.5.01 Listings UL No: UL Standard No. 478 CSA No: CSA Standard C22.2 (220) FCC: FCC Class B Microline 393 / 393C-Plus 1 - 5 Specifications Service Handbook P/N 59241602...
  • Page 48: Operational Specifications

    OPERATIONAL SPECIFICATIONS 1.6.01 Character Matrix Sizes Table of Print Speed and Character Matrix Mode Speed Matrix (Horizontal x Vertical) @ cpi Letter Quality 140 cps 30 x 18 @ 12 cpi Near Letter Quality 210 cps 15 x 18 @ 12 cpi Utility 415 cps 9 x 17 @ 12 cpi...
  • Page 49: Character Sets

    1.6.04 Character Sets Standard ASCII EPSON Character Set I & II IBM Character Set I, II & All Characters 16 Foreign Language Sets Zero / Slashed Zero DLL - 2 Sets of 128 characters 1.6.05 Emulations NOTE: The emulations are co-resident Epson LQ IBM XL24 Microline 393 / 393C-Plus...
  • Page 50: Fonts

    1.6.06 Fonts Standard Courier Swiss Roman Orator Optional Font Cartridges Prestige Letter Gothic 1.6.07 Front Panel Switches SELECT Paper Park / Top of Form Quiet (Menu) Mode Font Selection Line Feed Pitch Selection FORM FEED Print Quality Selection 1.6.08 Graphics Resolution 60 (horizontal) x 60 (vertical) dots per inch (DPI) minimum 360 (horizontal) x 360 (vertical) dots per inch (DPI) maximum 1.6.09...
  • Page 51: Line Feed Increments

    1.6.10 Line Feed Increments Fixed 6 lines per inch (lpi) [0.167 inch (4.23 millimeters)] 8 lines per inch (lpi) [0.125 inch (3.175 millimeters)] Variable n/60 inch n/72 inch n/180 inch n/216 inch n/360 inch 1.6.11 Line Feed Time 55 ms @ 6 LPI 8.0 IPS (inches per second) slew rate @ gap 1,2 6.0 IPS (inches per second) slew rate @ gap 3+ 1.6.12...
  • Page 52: Paper Feed Methods

    1.6.13 Paper Feed Methods Standard Friction Feed (Top) Rear Push Tractor (Rear) Optional Pull Tractor (Bottom) Cut Sheet Feeder (Top) CSF 30001 - Single Bin CSF 30002 - Dual Bin 1.6.14 Paper Feed Paths Top Feed (Standard) Rear Feed (Standard) Bottom Feed (by using an Optional feed mechanism) Special Features Paper Park...
  • Page 53: Print Method

    1.6.18 Print Method Printhead Type General Information Impact: Dot Matrix 24 pin printhead .0078 inch (0.20 millimeter) diameter pins Overheat Protection When printhead temperature reaches 115 to 125 degrees Celsius, the printer stops bi-directional printing. Uni-directional printing begins. If the temperature exceeds 125 degrees Celsius, printing stops. Printing will resume when the printhead temperature drops below 115 degrees Celsius.
  • Page 54: Printhead Gap Information

    Printhead Gap Information Two items factor into printhead gap information. 1. Printhead Gap Adjustment This is a SERVICE ADJUSTMENT made by a technician. It is covered in Section 3.3 of this Service Handbook. The Adjustment measures 0.017, +/- 0.001 inches (0.43, +/- 0.03 mm). 2.
  • Page 55: Print Modes

    1.6.19 Print Modes Letter Quality Near Letter Quality Utility High Speed Draft 1.6.20 Print Speed Pitch Head Gap High Speed Utility Near Letter Letter Quality Setting Draft Quality 10 cpi 345 cps 172 cps 115 cps 12 cpi 414 cps 207 cps 138 cps 15 cpi...
  • Page 56: Paper Specifications

    PAPER SPECIFICATIONS CAUTION: Use Bottom Feed and/or optional Pull Tractor for card stock and labels. 1.7.01 Types Card Stock Weight: 100 lbs. (375 g/m Maximum Width: 5 to 14 inches (12.7 to 35.6 centimeters) Length: 3 to 17 inches (7.62 to 43.18 centimeters) Thickness: .014 inches (0.36 millimeters) Paper Feed Path:...
  • Page 57: Cut Sheet

    Cut Sheet Weight: 12 to 24 lbs. (45 to 90 g/m Width: 7.2 to 16 inches (18.3 to 40.6 centimeters) Length: 3 to 17 inches (7.62 to 43.18 centimeters) Thickness: 0.002 to .0049 inches (0.5 to 0.12 millimeters) Paper Feed Path: Printhead Gap Information: Refer to the Printhead Gap Information, Section 1.6.
  • Page 58: Labels

    Labels Weight: Width: 3.5 to 15.5 inches (8.8 to 41.9 centimeters) Length: 3 to 17 inches (7.62 to 43.18 centimeters) Thickness: .011 inches (0.28 mm) Maximum (including backing) Paper Feed Path: Bottom Printhead Gap Information: Refer to the Printhead Gap Information, Section 1.6. CAUTION: Use Bottom Feed and/or optional Pull Tractor for card stock and labels.
  • Page 59: Number Of Copies

    1.7.02 Length NOTE: The recommended length is specific to paper type. Rear Feed Minimum 3 inches (7.62 centimeters) Maximum 17 inches (43.18 centimeters) Bottom Feed Minimum 3 inches (7.62 centimeters) Maximum 17 inches (43.18 centimeters) Top Feed Minimum 3 inches (7.62 centimeters) Maximum 17 inches (43.18 centimeters) 1.7.03...
  • Page 60: Weight

    1.7.05 Weight NOTE: The recommended weight is specific to paper type. Minimum: 12 lb. (45 g/m Maximum: 100 lb. (375 g/m 1.7.06 Width NOTE: The recommended width is specific to paper type. Paper Minimum: 3.5 inches ( 8.8 centimeters) Maximum: 16 inches (40.6 centimeters) Specifications 1 - 18...
  • Page 61: Memory Specifications

    MEMORY SPECIFICATIONS 1.8.01 128 Kbytes Resident Program ROM 384 Kbytes Resident Fonts 64 Kbytes each Optional Font Cartridges 1.8.02 Total RAM = 64 Kbytes Print Buffer 23 Kbytes Epson I/F Buffer 8 Kbytes IBM I/F Buffer 0 Kbytes (minimum) DLL Buffer 0 to 32 Kbytes 1.8.03 EEPROM...
  • Page 62: Consumables

    CONSUMABLES 1.9.01 Black Ribbon Cartridge Microline 393-Plus and Microline 393C-Plus Type: Fabric Ribbon Ribbon Life: 5 million characters 1.9.02 Color Ribbon Cartridge Microline 393C-Plus Type: Four band color ribbon (Yellow, Magenta, Cyan, Black) Ribbon Life: Black: 2.3 million characters Cyan: 1.8 million characters Magenta: 1.8 million characters Yellow: 1.3 million characters 1.9.03...
  • Page 63: Options

    1.10 OPTIONS 1.10.01 Cut Sheet Feeders Single Bin, CSF 30001 Single Bin with envelope capability Paper Width: 7.2 to 8.5 inches (18.3 to 21.7 centimeters) Paper Length: 10.1 to 14 inches (25.7 to 35.6 centimeters) Capacity: 170 sheets (16 lb.), 100 sheets (24 lb.) Dual Bin, CSF 3002 Dual Bin with envelope capability Paper Width: 7.2 to 8.5 inches (18.3 to 21.7 centimeters)
  • Page 64: Pull Tractor Kit

    1.10.02 Pull Tractor Kit NOTES: A Pull Tractor Assembly MUST be used to feed labels. The Pull Tractor Assembly is required for bottom feeding. Bottom Feed Rear Feed (For Push/Pull Operation) Paper Types: Continuous Feed and Labels 1.10.03 RAM Buffer Expansion Card 32 kbytes 1.10.04 Font Cartridges...
  • Page 65: Reliability

    1.11 RELIABILITY 1.11.01 Mean Time Before Failure (MTBF) Approximately 4,000 hours: 25% duty cycle / 35% page density 1.11.02 Mean Time To Repair (MTTR) Approximately 15 minutes to major sub-assembly level 1.11.03 Printer Life Approximately 12,000 hours of power-on time: 25% duty cycle / 35% page density 1.11.04 Printhead Life Average 200 million characters in 10 cpi utility mode @ normal 25% duty,...
  • Page 66 This page was intentionally left blank. Specifications 1 - 24 Microline 393 / 393C-Plus Service Handbook P/N 59241602...
  • Page 67: Section Two: Principles Of Operation

    SECTION TWO PRINCIPLES OF OPERATION...
  • Page 69: Electrical Operation

    ELECTRICAL OPERATION 2.1.01 General Information The Control Board consists of the microprocessor and its peripheral circuits, the drive circuits. The power to the Control Board is supplied by the power supply unit. The power to the other electrical parts is distributed via the connectors on the Control Board. 2.1.02 Microprocessors (MPUs) and Peripheral Circuits Microprocessors (Q16: 83C154UGS and Q11: 80C154VGS)
  • Page 70: Motor Control Lsi (Q9: Msm6990)

    Motor Control LSI (Q9: MSM6990) This LSI controls the functions listed below. Space Motor Speed Control To obtain the carriage speed instructed by the Microprocessor, the LSI generates the pulse switch timing and overdrive time Dot ON Timing generation I/O Port (Input port used to read Operator Panel switches) Address Latch (for lower 8 bits of the slave MPU) LSI (Q8: MSM74H002) This LSI drives the 24 pin printhead.
  • Page 71: Block Diagram Of Microline 393 / 393C-Plus

    Block Diagram of Microline 393 / 393C-Plus 2-1-02.pcx Microline 393 / 393C-Plus 2 - 3 Principles of Operation Service Handbook P/N 59241602...
  • Page 72: Initialization

    2.1.03 Initialization The printer is initialized whenever the power is turned ON or when the I-PRIME signal is received at the parallel interface. Initialization is started when the RST-P signal is sent from the reset circuit to the MPUs and LSIs. When RST-P is generated, ROM program execution starts with the mode setting of Q8, Q9, Q12 and Q13.
  • Page 73: Rs232-C Serial Interface

    RS232-C Serial Interface When the interface select switch is turned ON, the serial interface is selected and the Interface Control LSI is in the serial mode. Then the RS232-C interface signals (DSR, CTS, CD and RD) are converted to TTL levels by the line receiver (Q2) and input to the Master MPU, Slave MPU and MMU.
  • Page 74: Spacing Drive Circuit

    2.1.06 Spacing Drive Circuit The Motor Control LSI (Q9) outputs the SPMO DA signal upon receiving the spacing command from the Slave MPU (Q11). This is a fixed cycle pulse signal. To control the motor speed, the Motor Control LSI varies the pulse duty cycle according to the speed data from the Slave MPU.
  • Page 75: Line Feed Circuit

    2.1.07 Line Feed Circuit The Line Feed Motor Shaft is held stationary by +8 vdc supplied according to the pulse duty cycle of the LFCHOP signal (the holding current is approximately 30 ma) whenever in a stopped position. During line feed operation, the Line Feed Motor is driven by +38 vdc in accordance with the LFOVDV-N signal.
  • Page 76: Alarm Circuits

    2.1.08 Alarm Circuits Fault Alarm Circuit (in Power Supply Unit) This protective circuit turns off the Power Supply when a fault occurs in the printhead, line feed, or bail/ribbon motor drive circuits, thus preventing secondary component failure. To accomplish this, the circuit monitors the overdrive signal of each drive circuit. If the duration of any drive circuit exceeds a predetermined length of time, the appropriate signal (HDE ALM, HDO ALM, LF COM or RBN COM) will be sent to the fault alarm circuit.
  • Page 77: Paper End Detection Circuit

    2.1.09 Paper End Detection Circuit Whenever the Release Lever is in the Continuous Feed position, Paper End is detected by the microswitch on the Push Tractor (rear feed) or the Paper End sensor on the sensor board (bottom feed). Whenever the Release Lever is in the Sheet Feed position, Paper End is detected by a photosensor located in the paper pressure guide.
  • Page 78: Power Supply

    2.1.10 Power Supply This switching power supply converts the AC input voltage to +5 vdc, +/-8 vdc and +38 vdc for use throughout the printer. Voltage / Signal Table Voltage/Signal Purpose +5 vdc IC Logic Levels - LED Drive Voltage +8 vdc Serial Interface Logic Levels - Line Feed Motor Locking Voltage -8 vdc...
  • Page 79: Mechanical Operation

    MECHANICAL OPERATION 2.2.01 Printhead Mechanism The printer uses a highly efficient stored energy type printhead. Power is not consumed until the printwires are activated. This extends printhead life to approximately 200 million characters. The printhead uses 24 printwires (two columns of 12 wires each). Each wire is welded to an armature.
  • Page 80: Head Gap Adjusting

    Head Gap Adjusting The head gap adjusting mechanism adjusts the gap between the platen and printhead. Move the adjusting lever on the left side of the printer mechanism to change the head gap. When the lever is moved, the carriage shaft rotates. The carriage shaft is attached to the printer mechanism with eccentric collars.
  • Page 81 2-2-01A.pcx Wire Guide Armature Thermistor Print Wire Spacer Coil Ring Permanent Magnet 2-2-01B.pcx Microline 393 / 393C-Plus 2 - 13 Principles of Operation Service Handbook P/N 59241602...
  • Page 82: Spacing

    2.2.02 Spacing Spacing is performed when the space motor drives the carriage along the carriage shaft, parallel to the platen. The spacing mechanism consists of the items listed below. Space Motor Drive Pulley Idle Pulley Carriage Shaft Carriage Frame Space Belt Spacing Operation The carriage containing the printhead moves parallel to the platen along the main carriage shaft.
  • Page 83: Ribbon Drive

    2.2.03 Ribbon Drive The ribbon drive mechanism moves the ribbon in synchronization with the space motor operation. The ribbon drive mechanism consists of the items listed below. Ribbon Drive Assembly Ribbon Cartridge Ribbon Cartridge An endless ribbon with a single direction feed is used. Ink is supplied from an ink tank, which is built-in to the ribbon cartridge.
  • Page 84: Paper Feed

    2.2.04 Paper Feed Paper feeding is performed by turning the platen and the pin tractor, which is driven by the line feed pulse motor. The paper feed mechanism consists of the items listed below. Pulse Motor (with gears) Idler Gear Change Spring Change Gear Platen...
  • Page 85: Bottom Feed Paper-End

    2.2.05 Paper-End Detection Cut-Sheet Paper-End Sensor When the release lever is in the SHEET FEED position, the photosensor located in the paper pressure guide is active. If sheet paper is installed, the paper is detected by the sensor and the sensor is activated (ON).
  • Page 86: Paper Park

    2.2.06 Paper Park General Information Paper park allows the user to switch from continuous feed paper to single-sheet paper without removing the continuous feed paper from the printer. The continuous feed paper will be retracted from the platen and down into the printer housing without disengaging it from the built-in tractor.
  • Page 87: Procedure: Continuous Feed To Single Sheet

    Procedure: Continuous Feed to Single Sheet 1. Tear off any printed pages. 2. Make sure the printer is selected. The SELECT lamp must be lit. 3. Press PARK / TOF. 4. The paper will retract from the paper path. 5. Move the paper selection to the single sheet position (towards the back of the printer). 6.
  • Page 88: Automatic Paper Loading

    2.2.07 Automatic Paper Loading Automatic Paper Loading is used to consistently set the print start position when using cut-sheet or continuous sheet paper. The procedure is listed below. Cut-Sheet Paper 1. Push the Paper Release Lever to the Cut-Sheet position. 2.
  • Page 89: Maintenance

    SECTION THREE MAINTENANCE...
  • Page 91: General Information

    MAINTENANCE 3.1.01 General Information This section lists the parts replacement, adjustment, cleaning, lubrication, and shipping procedures. Disassembly should not be performed unless absolutely necessary. NEVER perform disassembly on a malfunctioning unit until you have followed the failure analysis procedures in Section Four of this Service Handbook.
  • Page 92: Maintenance Precautions

    Cleaning / Lubrication Shop Vacuum Cloth (soft and lint-free) All-Purpose Cleaner Platen Cleaner Contact Kleen (Okidata P/N 51802301) Machine Grease Machine Oil 3.1.03 Maintenance Precautions 1. Do not disassemble the unit if it is operating normally. 2. Before starting disassembly and assembly, always power OFF the unit and detach the AC power cord.
  • Page 93 12. Perform the line feed belt tension adjustment when any of the following occur. Erratic line spacing occurs Parts are replaced Line Feed Belt (3.2.09). 13. Perform the color adjustment when any of the following occur. Colors "bleed" into one another Parts are replaced Ribbon Shift Cam and Ribbon Shift Gear (3.2.27) Ribbon Shift Cam Lever Assembly (3.2.28)
  • Page 94: Disassembly/Assembly Procedures

    DISASSEMBLY/ASSEMBLY PROCEDURES General Information This section contains the printer disassembly procedures. Only the removal procedures are explained here. Reverse the procedure for the installation. At the bottom of each procedure is a listing of the parts covered in that procedure. The Okidata part number, item description, comment (RSPL, Option, Consumable) and cross-reference to Appendix B is provided for each part.
  • Page 95: Microline 393C-Plus Only (Color Version)

    Microline 393C-Plus Only (Color Version) 3.2.23 Ribbon Shift Arm and Shift Arm Spring 3.2.24 Roller Lever 3.2.25 Ribbon Guide 3.2.26 Bail Open Cam and Bail Open Gear 3.2.27 Ribbon Shift Cam and Ribbon Shift Gear 3.2.28 Ribbon Shift Cam Lever Assembly Cut Sheet Feeder - Option 3.2.29 Friction Sheet 3.2.30 Rear Bin...
  • Page 96: Preliminary Items, Printhead

    3.2.01 Preliminary Items, Printhead WARNING: The printhead will be HOT immediately after printing. 1. Power OFF the printer and detach the AC power cord (1). 2. Detach the interface cable, if installed. [Not Shown] 3. Open the printer access cover. 4.
  • Page 97 3-2-01.pcx Microline 393 / 393C-Plus 3 - 7 Maintenance Service Handbook P/N 59241602...
  • Page 98: Ribbon Guide

    3.2.02 Ribbon Guide 1. Remove the printhead (3.2.01). 2. Remove the two mounting screws (1). 3. Lift the ribbon guide (2) and remove it. P/N 53055901 Guide: Ribbon (Black) RSPL B.2.12 Maintenance 3 - 8 Microline 393 / 393C-Plus Service Handbook P/N 59241602...
  • Page 99 3-2-02.pcx Microline 393 / 393C-Plus 3 - 9 Maintenance Service Handbook P/N 59241602...
  • Page 100: Ribbon Protector

    3.2.03 Ribbon Protector 1. Remove the printhead (3.2.01). 2. Remove the ribbon guide (3.2.02). 3. Remove the two mounting screws (1). 4. Lift the ribbon protector (2) and remove it. P/N 53527001 Protector: Ribbon RSPL B.2.12 13 Maintenance 3 - 10 Microline 393 / 393C-Plus Service Handbook P/N 59241602...
  • Page 101 3-2-03.pcx Microline 393 / 393C-Plus 3 - 11 Maintenance Service Handbook P/N 59241602...
  • Page 102: Upper Cover Assembly

    3.2.04 Upper Cover Assembly Procedure 1. Disconnect the interface cable (1). 2. Remove the font cartridge or buffer expansion cartridge (2) if installed. 3. Detach the two platen knobs (3). 4. Remove the two cover mounting screws (4) at the rear of the printer. 5.
  • Page 103 3-2-04.pcx Microline 393 / 393C-Plus 3 - 13 Maintenance Service Handbook P/N 59241602...
  • Page 104: Parts List

    Parts List P/N 70000803 Kit: Parallel Interface Plug’n’Play Option B.2.14 Accessory (Cable) P/N 70012801 Kit: RS232-C Serial Interface Cable Option B.2.14 P/N 70010201 Gothic Font Cartridge Option B.2.03 14 P/N 70010101 Prestige Font Cartridge Option B.2.03 14 P/N 70016401 Cartridge: 32 Kbyte RAM Expansion Option B.2.03 14 P/N 53478601...
  • Page 105 3-2-04.pcx Microline 393 / 393C-Plus 3 - 15 Maintenance Service Handbook P/N 59241602...
  • Page 106: Operator Panel Assembly

    3.2.05 Operator Panel Assembly 1. Remove the upper cover assembly (3.2.04). 2. Disconnect the operator panel cable (1) from CN10 (2) on the control board. 3. Remove the two mounting screws (3). 4. Detach the operator panel holder (4) by moving it upward, and then pulling toward the front of the printer.
  • Page 107 3-2-05.pcx Microline 393 / 393C-Plus 3 - 17 Maintenance Service Handbook P/N 59241602...
  • Page 108: Control Board (Lqem)

    3.2.06 Control Board (LQEM) 1. Remove the upper cover assembly (3.2.04). 2. Remove the ribbon cartridge. 3. Release the lock of connector CN10 (1) and detach the operator panel cable (2). 4. Remove the five shield cover mounting screws (3). 5.
  • Page 109 3-2-06.pcx Microline 393 / 393C-Plus 3 - 19 Maintenance Service Handbook P/N 59241602...
  • Page 110: Interface Connector Board (Lqpn)

    3.2.07 Interface Connector Board (LQPN) NOTE: To allow easier access to the mounting screw and cables, configure the interface connector board to use the serial interface connector. 1. Remove the upper cover assembly (3.2.04). 2. Disconnect connectors CN102 (1) and CN103 (2). 3.
  • Page 111 3-2-07.pcx Microline 393 / 393C-Plus 3 - 21 Maintenance Service Handbook P/N 59241602...
  • Page 112: Printer Mechanism

    3.2.08 Printer Mechanism 1. Remove the upper cover assembly (3.2.04). 2. Remove the control board (3.2.06). 3. Detach connectors CN102 (1) and CN103 (2) from the interface connector board. 4. Remove the three mounting screws (3) at the rear of the printer mechanism (4). 5.
  • Page 113 3-2-08.pcx Microline 393 / 393C-Plus 3 - 23 Maintenance Service Handbook P/N 59241602...
  • Page 114: Platen Assembly

    3.2.09 Platen Assembly 1. Remove the upper cover assembly (3.2.04). 2. Loosen the three 7 mm line feed motor mounting bolts (1). 3. Move the line feed motor (2) closer to the platen (3) and detach the line feed mini-pitch belt (4). 4.
  • Page 115 3-2-09.pcx Microline 393 / 393C-Plus 3 - 25 Maintenance Service Handbook P/N 59241602...
  • Page 116: Line Feed Motor

    3.2.10 Line Feed Motor 1. Remove the upper cover assembly (3.2.04). 2. Remove the printer mechanism (3.2.09). 3. Remove the three mounting bolts and washers (1). 4. Remove the line feed motor (2). NOTE: When installing the line feed motor, the cable should be positioned toward the top. Adjust the line feed belt tension (3.3.02) after installing the line feed motor.
  • Page 117 3-2-10.pcx Microline 393 / 393C-Plus 3 - 27 Maintenance Service Handbook P/N 59241602...
  • Page 118: Printhead Cable Assembly

    3.2.11 Printhead Cable Assembly 1. Detach the printhead (3.2.01). 2. Remove the upper cover assembly (3.2.04). 3. Remove the printer mechanism (3.2.09). 4. Work from the bottom of the printer mechanism and loosen the two mounting screws (1). 5. Detach tabs (A) and (B) from the frame and remove the cable holder (2). 6.
  • Page 119 Head Cable and Plastic installed Correctly Head Cable and Plastic installed Incorrectly 3-2-11.pcx Microline 393 / 393C-Plus 3 - 29 Maintenance Service Handbook P/N 59241602...
  • Page 120: Sensor Board

    3.2.12 Sensor Board 1. Remove the upper cover assembly (3.2.04). 2. Remove the printer mechanism (3.2.09). 3. Raise the front of the printer mechanism. 4. Disconnect cables CN2 (1) and CN3 (2) from the sensor board (3). 5. Remove the three sensor board mounting screws (4). 6.
  • Page 121 3-2-12.pcx Microline 393 / 393C-Plus 3 - 31 Maintenance Service Handbook P/N 59241602...
  • Page 122: Ribbon Feed Assembly

    3.2.13 Ribbon Feed Assembly 1. Remove the upper cover assembly (3.2.04). 2. Remove the printer mechanism (3.2.08). 3. Remove the left shoulder screw [color] (1A) and right should screw [color] (1B). 4. Detach the cartridge bracket (2). 5. Remove the two mounting screws (3). 6.
  • Page 123 Do not remove this screw 3-2-13.pcx Microline 393 / 393C-Plus 3 - 33 Maintenance Service Handbook P/N 59241602...
  • Page 124: Space Motor Assembly

    3.2.14 Space Motor Assembly 1. Remove the printhead (3.2.01). 2. Remove the upper cover assembly (3.2.04). 3. Remove the ribbon feed assembly (3.2.13). 4. Loosen the two belt pulley bracket mounting screws (1). 5. While pushing the belt pulley bracket (2) to the left, temporarily tighten the two screws.
  • Page 125 When assembling, A must be equal to B Push to left Adjustment when assembling 3-2-14.pcx Microline 393 / 393C-Plus 3 - 35 Maintenance Service Handbook P/N 59241602...
  • Page 126: Space Belt

    3.2.15 Space Belt 1. Remove the printhead (3.2.01). 2. Remove the upper cover assembly (3.2.04). 3. Remove the head cable assembly (3.2.11). 4. Remove the space motor assembly (3.2.14). 5. Remove the mounting screw (1). 6. Detach the belt clamp (2). 7.
  • Page 127 3-2-15.pcx Microline 393 / 393C-Plus 3 - 37 Maintenance Service Handbook P/N 59241602...
  • Page 128: Bail/Ribbon Motor Assembly

    3.2.16 Bail/Ribbon Motor Assembly 1. Remove the upper cover assembly (3.2.04). 2. Remove the printer mechanism (3.2.09). 3. Disconnect connector CN2 (1). 4. Remove the two mounting screws (2). 5. Detach the bail/ribbon motor assembly (3). NOTE: When assembling, install the bail/ribbon motor assembly so that the gear teeth contact properly.
  • Page 129 3-2-17.pcx Microline 393 / 393C-Plus 3 - 39 Maintenance Service Handbook P/N 59241602...
  • Page 130: Paper Bail Assembly

    3.2.17 Paper Bail Assembly 1. Remove the upper cover assembly (3.2.04). 2. Remove the printer mechanism (3.2.08). 3. Remove the bail/ribbon motor assembly (3.2.16). 4. Detach the left bail arm spring (1A) and right bail arm spring (1B). 5. Remove the bail arm idle gear (2). 6.
  • Page 131 3-2-18.pcx Microline 393 / 393C-Plus 3 - 41 Maintenance Service Handbook P/N 59241602...
  • Page 132: Carriage And Carriage Shaft

    3.2.18 Carriage and Carriage Shaft Procedure 1. Remove the printhead (3.2.01). 2. Remove the upper cover assembly (3.2.04). 3. Loosen the screw (1) and slide it towards the back of the printer. This screw affects the placement of the slide guide (1A). 4.
  • Page 133 3-2-19.pcx Microline 393 / 393C-Plus 3 - 43 Maintenance Service Handbook P/N 59241602...
  • Page 134 Parts List P/N 51005501 Guide: Slide B.2.12 13 P/N 50703701 Collar: Eccentric (Carr. Rail) RSPL B.2.08 11 Head Adjustment P/N 53478401 Lever: Printhead Gap Adjust RSPL B.2.07 10 P/N 50705701 Ring: Cushion (Stopper) B.2.08 11 P/N 51110301 Shaft: Carriage B.2.08 11 P/N 50057601 Carriage: Black Assembly RSPL...
  • Page 135 3-2-19.pcx Microline 393 / 393C-Plus 3 - 45 Maintenance Service Handbook P/N 59241602...
  • Page 136 3.2.19 Paper Pressure Guide 1. Remove the printhead (3.2.01). 2. Remove the upper cover assembly (3.2.04). 3. Remove the two paper chute springs (1) located on each side of the paper chute assembly (2). 4. Loosen the two screws, located under the post on the left side of the printer mechanism.
  • Page 137 3-2-20.pcx Microline 393 / 393C-Plus 3 - 47 Maintenance Service Handbook P/N 59241602...
  • Page 138 3.2.20 Printhead Gap / Release Lever Microswitches 1. Remove the upper cover assembly (3.2.04). 2. Remove the mounting screw to remove the adjust and release lever micro switch (1). 3. Push down on the mounting tab and remove the printhead gap microswitch (2). 4.
  • Page 139 The harness is routed to the main logic board. 3-2-21.pcx Microline 393 / 393C-Plus 3 - 49 Maintenance Service Handbook P/N 59241602...
  • Page 140: Push Tractor Assembly

    3.2.21 Push Tractor Assembly Procedure - Disassembly 1. Remove the upper cover assembly (3.2.04). 2. Remove the lower center guide A(1A) and lower center guide B (1B). 3. Separate the claws (2) and remove the drive gear A (3A) and drive gear B (3B) from the right side of the printer mechanism.
  • Page 141 3-2-22.pcx Microline 393 / 393C-Plus 3 - 51 Maintenance Service Handbook P/N 59241602...
  • Page 142: Parts List

    Procedure - Installation Notes NOTES: When installing the push tractor assembly, follow the precautions listed below. 1. Install the friction piece in the upper center guide. If the upper center guide moves easily along the locking shaft, use a standard screwdriver to rotate the friction piece 45 degrees (12).
  • Page 143 3-2-22.pcx Microline 393 / 393C-Plus 3 - 53 Maintenance Service Handbook P/N 59241602...
  • Page 144: Power Supply Unit

    3.2.22 Power Supply Unit 1. Remove the printer mechanism (3.2.08). 2. Disconnect the two cables (1) from the left side of the power supply unit (2). 3. Remove the four power supply mounting screws (3). 4. Remove the power supply unit by pulling toward the left-front side of the printer. You must raise the power supply unit slightly so it will become detached from the two guides (A) in the lower cover.
  • Page 145 3-2-23.pcx Microline 393 / 393C-Plus 3 - 55 Maintenance Service Handbook P/N 59241602...
  • Page 146: Microline 393C-Plus - Color Model Only

    Microline 393C-Plus - Color Model Only 3.2.23 Ribbon Shift Arm Spring / Ribbon Shift Arm 1. Detach the printer access cover. 2. Remove the ribbon cartridge (1). 3. Remove the shift arm spring (2). 4. Remove the 7 mm mounting bolt (3) and detach the ribbon shift arm (4). P/N 53478901 Arm: Ribbon Shift (Color) RSPL...
  • Page 147 3-2-24.pcx Microline 393 / 393C-Plus 3 - 57 Maintenance Service Handbook P/N 59241602...
  • Page 148: Roller Lever

    3.2.24 Roller Lever 1. Open the printer access cover. 2. Remove the ribbon cartridge. 3. Remove the shift arm spring (3.2.23). 4. Remove the two 7 mm bolts (1) and detach the roller lever (2). P/N 53479001 Lever: Roller (Color) RSPL B.2.13 P/N N/A...
  • Page 149 3-2-25.pcx Microline 393 / 393C-Plus 3 - 59 Maintenance Service Handbook P/N 59241602...
  • Page 150: Ribbon Guide

    3.2.25 Ribbon Guide 1. Remove the printhead (3.2.01). 2. Loosen the 7 mm ribbon shift arm mounting bolt (1) and detach the ribbon shift arm (2) from projection A of the ribbon guide (3). 3. Remove the two printhead mounting screws. 4.
  • Page 151 3-2-26.pcx Microline 393 / 393C-Plus 3 - 61 Maintenance Service Handbook P/N 59241602...
  • Page 152: Bail Open Cam And Bail Open Gear

    3.2.26 Bail Open Cam and Bail Open Gear 1. Remove the printer mechanism (3.2.08). 2. Detach the “E” snap ring (1). 3. Remove the bail open gear (2). 4. Remove the bail open cam (3). 5. Remove the plastic ring (4). Caution: Installation When installing, make sure that the plastic ring is positioned against the rim on the bail...
  • Page 153 3-2-27.pcx Microline 393 / 393C-Plus 3 - 63 Maintenance Service Handbook P/N 59241602...
  • Page 154 3.2.27 Ribbon Shift Cam and Ribbon Shift Gear 1. Remove the printer mechanism (3.2.08). 2. Detach the “E” snap ring (1). 3. Remove the ribbon shift gear (2). 4. Remove the washer. 5. Remove the ribbon shift cam (3). NOTE: Installation Hold back the spring (4) while pushing the gear and cam on the shaft.
  • Page 155 3-2-27.pcx Microline 393 / 393C-Plus 3 - 65 Maintenance Service Handbook P/N 59241602...
  • Page 156: Ribbon Shift Cam Lever Assembly

    3.2.28 Ribbon Shift Cam Lever Assembly 1. Remove the printer mechanism (3.2.08). 2. Remove the ribbon shift cam and ribbon shift gear (3.2.27). 3. Remove the mounting screw (1) 4. Detach the ribbon shift cam lever (2) from the cartridge bracket (3). NOTE: Installation Perform the color adjustment.
  • Page 157 3-2-29.pcx Microline 393 / 393C-Plus 3 - 67 Maintenance Service Handbook P/N 59241602...
  • Page 158: Friction Sheet

    CUT SHEET FEEDER - OPTION 3.2.29 Friction Sheet 1. Power OFF the printer. 2. Remove the cut sheet feeder. 3. Remove the sheet supporter (1). 4. Move the paper lock lever (2) towards the back. 5. Remove the friction sheets (5) from the sheet guide A (3) and sheet guide B (4). NOTE: Installation When installing new friction sheets, remove the peel-off backing.
  • Page 159 3-2-29b.pcx Microline 393 / 393C-Plus 3 - 69 Maintenance Service Handbook P/N 59241602...
  • Page 160: Rear Bin

    3.2.30 Rear Bin 6. Power OFF the printer. 7. Remove the cut sheet feeder. 8. Remove the front sheet supporter (1). 9. Remove the rear sheet supporter (2). 10. Use a screwdriver (5) to push the lock levers (6) in the direction of arrow A. The levers are inside the left side cover (3) and right side cover (4) of the rear-bin unit (10).
  • Page 161 When Disengaging Before Disengaging 3-2-30b.pcx Microline 393 / 393C-Plus 3 - 71 Maintenance Service Handbook P/N 59241602...
  • Page 162: Side Cover

    3.2.31 Side Cover 1. Power OFF the printer. 2. Remove the cut sheet feeder. 3. Disengage the rear-bin unit from the front-bin unit (3.2.30). 4. Remove the three screws (1). 5. Remove the bolt (2). 6. Remove the collar (3). 7.
  • Page 163 3-2-31b.pcx Microline 393 / 393C-Plus 3 - 73 Maintenance Service Handbook P/N 59241602...
  • Page 164: Roller Supports And Rollers (H)

    3.2.32 Roller Supports and Rollers (H) 1. Power OFF the printer. 2. Remove the cut sheet feeder. 3. Disengage the rear-bin unit from the front-bin unit (3.2.30). 4. Remove the left and right side covers from the front and rear bin units (3.2.31). 5.
  • Page 165 Groove Flange 3-2-32b.pcx Microline 393 / 393C-Plus 3 - 75 Maintenance Service Handbook P/N 59241602...
  • Page 166: Control Board

    3.2.33 Control Board 1. Power OFF the printer. 2. Remove the cut sheet feeder. 3. Disengage the rear-bin unit from the front-bin unit (3.2.30). 4. Remove the left side cover from the front bin unit (3.2.31). 5. Disconnect connectors CN1 (1) and CN2 (2). 6.
  • Page 167 3-2-33b.pcx Microline 393 / 393C-Plus 3 - 77 Maintenance Service Handbook P/N 59241602...
  • Page 168: Connection Cord

    3.2.34 Connection Cord 1. Power OFF the printer. 2. Remove the cut sheet feeder. 3. Disengage the rear-bin unit from the front-bin unit (3.2.30). 4. Remove the left side cover from the front bin unit (3.2.31). 5. Disconnect connector CN1 (2) from the control board (1). 6.
  • Page 169 3-2-34b.pcx Microline 393 / 393C-Plus 3 - 79 Maintenance Service Handbook P/N 59241602...
  • Page 170: Motor Assembly

    3.2.35 Motor Assembly 1. Power OFF the printer. 2. Remove the cut sheet feeder. 3. Disengage the rear-bin unit from the front-bin unit (3.2.30). 4. Remove the left and right side covers from the front bin unit (3.2.31). 5. Remove the control board (3.2.33). 6.
  • Page 171 3-2-35b.pcx Microline 393 / 393C-Plus 3 - 81 Maintenance Service Handbook P/N 59241602...
  • Page 172: Printer Adjustments

    PRINTER ADJUSTMENTS 3.3.01 General Information This section contains the procedures for performing adjustments on the printer. These procedures may be required when replacing either consumables or parts. The disassembly/assembly procedures list the required adjustments and refer you to this section. Failure to perform these procedures may result in unnecessary service calls.
  • Page 173: Printhead Gap Adjustment

    3.3.02 Printhead Gap Adjustment General Information Before performing this adjustment, always verify that the printhead is properly installed. Perform the printhead gap adjustment procedure when any of the following occur. Poor Print Quality Uneven Print Quality (darker on one side of the document). Excessive wear on the printhead or platen Parts are replaced Printhead (3.2.01)
  • Page 174 Procedure 1. Remove the printhead (3.2.01). 2. Remove the ribbon guide (3.2.02). 3. Remove the ribbon protector (3.2.03). 4. Install the printhead. 5. Set the printhead gap lever to position 1. 6. Set the paper release lever to the OPEN position. 7.
  • Page 175 3-3-01.pcx Microline 393 / 393C-Plus 3 - 85 Maintenance Service Handbook P/N 59241602...
  • Page 176: Line Feed Belt Tension

    3.3.03 Line Feed Belt Tension General Information Perform the line feed belt tension adjustment when any of the following occur. Erratic line spacing occurs Parts are replaced Line Feed Belt (3.2.09). Procedure 1. Rotate the platen pulley at least once before making the adjustment 2.
  • Page 177: Color Adjustment (Microline 393C-Plus Printer)

    3.3.04 Color Adjustment (Microline 393C-Plus Printer) General Information Perform the color adjustment when any of the following occur. Colors "bleed" into one another Parts are replaced Ribbon Shift Cam and Ribbon Shift Gear (3.2.27) Ribbon Shift Cam Lever Assembly (3.2.28) Procedure: Ribbon Home Adjustment 1.
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  • Page 179: Key Combinations

    3.3.05 Key Combinations Key Combination Function SELECT + FORM FEED Activates Hexadecimal Dump Mode (Hold during power ON) SELECT + PARK/TOF Resets Printer Menu to factory defaults (Hold during power ON) LINE FEED Activate Font Test (Hold during power ON) To end Font Test, press SELECT QUIET Activate Menu...
  • Page 180: Menu Operation

    3.3.06 Menu Operation General Information The menu is used to customize the printer’s settings and features. The Menu is made up of a number of Groups. Each Group has a list of Items. Each Item has several Settings. Maintenance 3 - 90 Microline 393 / 393C-Plus Service Handbook P/N 59241602...
  • Page 181: Menu Mode

    Menu Mode CAUTION: If the Menu is set for wide paper, and narrow paper is used, the printhead will print on the platen. This could damage / destroy the printhead, platen, and ribbon. To place the printer in the Menu Mode, follow this procedure. 1.
  • Page 182: Menu Print

    Menu Print 1. Verify that paper and the ribbon are installed. 2. Power ON the printer. 3. Press SELECT and place the printer OFF-LINE (SELECT will not be lit). 4. Press QUIET to enter Menu Mode. 5. The line shown below will print. Font Print Quality 6.
  • Page 183 Sample Menu 3-3-05.pcx Microline 393 / 393C-Plus 3 - 93 Maintenance Service Handbook P/N 59241602...
  • Page 184 Menu Settings Factory default settings are printed in Bold Italic. Group Item Setting Font Print Quality LQ , NLQ, Utility, HSD Typestyle Courier , Roman, Helvette, Orator, Cartridge, DLL 10 cpi , 12 cpi, 15 cpi, 17.1 cpi, Pitch 20 cpi, Proportional Style Normal , Italics Size...
  • Page 185 Factory default settings are printed in Bold Italic. Group Item Setting Vertical Control Line Spacing 6 LPI , 8 LPI Form Tear Off Off , 300 mS, 1 sec, 2 sec Skip Over Perforation No , Yes Auto LF No , Yes Auto CR No , Yes 3", 3.5", 4", 5.5"...
  • Page 186 Menu Reset CAUTION: Once the menu has been reset, all customized menu settings WILL BE LOST. ALWAYS print the menu BEFORE resetting the printer to factory defaults. To reset the menu to factory default settings, follow this procedure. 1. Print the Menu. When the menu is reset, ALL customized settings ARE LOST.
  • Page 187 Limited Operation General Information The Operator Panel Functions Item in the Printer Menu can be set to either Full Operation or Limited Operation. If the printer is part of a customized system or if it is used by different operators, a system manager may be using this feature to maintain proper print settings. FONT, PRINT QUALITY, and CHARACTER PITCH (on the operator panel) do not work when the printer is set for Limited Operation.
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  • Page 189: Top Of Form

    3.3.07 Top of Form General Information Top of form is the distance from the top edge of the paper to the first print position on the page. The red line on the ribbon protector indicates the baseline of the Top of Form. When the printer advances paper to the next page, it stops at the top of form.
  • Page 190: Paper Park

    3.3.08 Paper Park General Information Paper park allows the user to switch from continuous feed paper to single-sheet paper without removing the continuous feed paper from the printer. The continuous feed paper will be retracted from the platen and down into the printer housing without disengaging it from the built-in tractor.
  • Page 191: Procedure: Continuous Feed To Single Sheet

    Procedure: Continuous Feed to Single Sheet 1. Tear off any printed pages. 2. Make sure the printer is selected. The SELECT lamp must be lit. 3. Press PARK / TOF. 4. The paper will retract from the paper path. 5. Move the paper selection to the single sheet position (towards the back of the printer). 6.
  • Page 192: Forms Tear Off

    3.3.09 Forms Tear Off General Information This feature (when activated) will automatically advance continuous feed paper to the tear-off position after it finishes printing the last page in the document. A few seconds after printing stops, the printer will move the paper up to the tear-off position, aligning the perforation with the serrated edge on the access cover.
  • Page 193 Procedure 1. Load continuous feed paper into the printer. 2. Verify that the ribbon is installed. 3. Power ON the printer. 4. Verify that the printer is ON-LINE (SELECT lamp is lit). 5. Press SELECT and place the printer OFF-LINE (SELECT will not be lit). 6.
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  • Page 195: Resets

    3.3.10 Resets Menu Reset CAUTION: Print the menu before retting it to factory defaults. When the menu is reset, ALL customized settings ARE LOST. Printing the Menu provides a reference of customized settings. If the Menu is set for wide paper, and narrow paper is used, the printhead will print on the platen.
  • Page 196: Cleaning

    CLEANING WARNING When cleaning the printer, power OFF the printer and detach the AC power cable from the printer and the AC outlet. 3.4.01 General Information An accumulation of paper dust is the most frequent cause of print quality problems in a dot matrix printer.
  • Page 197: Areas To Be Cleaned

    3.4.04 Areas to be Cleaned Areas to be Cleaned Action to be Taken Paper Paths Vacuum and wipe up paper bits and dust. Printer Mechanism Vacuum paper dust Carriage Shaft Wipe clean with lint-free cloth Slide Bar Wipe clean with lint-free cloth Ribbon Protector Use a dry cotton swab to remove ink residue Single Sheet Sensor...
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  • Page 199: Lubrication

    LUBRICATION 3.5.01 General Information If the lubrication procedures are not performed properly, the printer will require more frequent cleaning. Excessive lubricant attracts dust and accumulations build up quickly. An accumulation of paper dust is the most frequent cause of print quality problems in a dot matrix printer.
  • Page 200: Areas Not Lubricated

    3.5.04 Areas Not Lubricated Lubricant should never contact the parts listed below. Sensors Printhead Mini-pitch Belt Space Belt Ribbon Tractor Pins Platen Assembly (Rubber Face) Pressure Roller (Rubber Face) Head Cable Space Motor Printed Circuit Board Electrical Contacts and Connections Teeth of the gears in the Gear Case Assembly Maintenance 3 - 110...
  • Page 201: Lubrication Points (Monochrome And Color)

    Lubrication Points (Monochrome and Color) Left and Right Sides of Printer Type Amount Diagram Designation Abundant PM- A Machine Oil Medium: 3 - 4 Drops PM - B 10w-30 or equivalent Small: 1 Drop PM - C Grease Abundant GEP - A Alvania grease #2 EP Medium GEP - B...
  • Page 202: Platen, Carriage Shaft, Idle Gear

    Platen, Carriage Shaft, Idle Gear Type Amount Diagram Designation Abundant PM- A Machine Oil Medium: 3 - 4 Drops PM - B 10w-30 or equivalent Small: 1 Drop PM - C Grease Abundant GEP - A Alvania grease #2 EP Medium GEP - B Moly-lube grease...
  • Page 203: Ribbon Feed Assembly

    Ribbon Feed Assembly Type Amount Diagram Designation Abundant PM- A Machine Oil Medium: 3 - 4 Drops PM - B 10w-30 or equivalent Small: 1 Drop PM - C Grease Abundant GEP - A Alvania grease #2 EP Medium GEP - B Moly-lube grease Thin coating(.008 inches) or equivalent...
  • Page 204: Lubrication Points (Color)

    Lubrication Points (Color) Type Amount Diagram Designation Abundant PM- A Machine Oil Medium: 3 - 4 Drops PM - B 10w-30 or equivalent Small: 1 Drop PM - C Grease Abundant GEP - A Alvania grease #2 EP Medium GEP - B Moly-lube grease Thin coating(.008 inches) or equivalent...
  • Page 205: Lubrication Points (Options)

    Lubrication Points (Options) Type Amount Diagram Designation Abundant PM- A Machine Oil Medium: 3 - 4 Drops PM - B 10w-30 or equivalent Small: 1 Drop PM - C Grease Abundant GEP - A Alvania grease #2 EP Medium GEP - B Moly-lube grease Thin coating(.008 inches) or equivalent...
  • Page 206: Shipping Instructions

    SHIPPING INSTRUCTIONS 3.6.01 Return for Service CAUTION: When shipping the printer, use the original packaging to prevent damage. Be sure to secure the printhead so it will not move during shipment. 1. Locate the original packaging or order replacement packaging from Okidata. (Refer to Appendix B) 2.
  • Page 207: All Other Returns

    3.6.02 All Other Returns CAUTION: The product MUST be returned in the original packaging. The product MUST be returned with ALL originally supplied factory items. Be sure to secure the printhead so it will not move during shipment. 1. Locate the original packaging or order replacement packaging from Okidata. (Refer to Appendix B) 2.
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  • Page 209: Section Four: Failure Analysis

    SECTION FOUR FAILURE ANALYSIS...
  • Page 211: Overview

    OVERVIEW 4.1.01 Introduction This section is used to isolate problems to the assembly level. Application problems and detection of faulty components on the printed circuit boards are NOT addressed. When troubleshooting a defective unit, follow these steps. 1. Refer to Section 4.3, which explains where to check for updates to the troubleshooting information.
  • Page 212: Printer Serial Number Identification

    4.1.02 Printer Serial Number Identification To identify the revision level of a printer, record the serial number from the back of the printer. Refer to the following to decode the serial number. Example Printer Serial Number: 401A0154693 Date Code 401 (4 = year. 01 = month) Revision Serial Number 0154693...
  • Page 213: Reporting Problems

    REPORTING PROBLEMS 4.2.01 General Information Okidata strives to provide accurate and detailed service information through its training materials. The Technical Training Group realizes that service technicians have valuable experience, knowledge, and opinions. Okidata strongly encourages you to report any problems you may encounter when using the materials of this training kit.
  • Page 214: Reporting Methods

    4.2.03 Reporting Methods Okilink II You may use Okilink II to report your findings. Refer to the Service Center Reference Guide for information on using Okilink II. Course Critique Use the Course Critique to report any problems you find as you are completing the self-paced training.
  • Page 215: Troubleshooting Updates

    TROUBLESHOOTING UPDATES 4.3.01 General Information Okidata distributes updated troubleshooting information in three ways. Okilink II Faxable Facts Technical Service Bulletins 4.3.02 Okilink II Okilink II is Okidata’s Bulletin Board Service. This service is available to all Okidata Certified Service Technicians. Okilink II provides troubleshooting and service information. Technicians can download files, ask questions of Okidata’s technical support personnel, and participate in round table discussions about Okidata products and services.
  • Page 216: Troubleshooting Tips

    TROUBLESHOOTING TIPS 4.4.01 Preliminary Checks 1. Is the product being operated under the proper ambient conditions? 2. Does the paper being used meet the specifications for this product? 3. Has the ribbon been replaced as recommended? 4. Has the ribbon been installed properly? 5.
  • Page 217: Problem Categories

    4.4.02 Problem Categories There are three categories of problems that you might encounter when servicing the printer. ALARM Lamp Blinks (Fatal Errors) The following can cause the ALARM lamp to blink. Open Bail Arm Jammed Paper Printhead Cannot Move Other Fatal Error When the ALARM Lamp is blinking, check the items listed below.
  • Page 218: Start Here Flowchart

    4.4.03 START HERE Flowchart START Does the failure occur immediately after the unit is powered ON? Which of the following resembles the problem? Power is not supplied to the printer Refer to RAP 01 No spacing operation Refer to RAP 02 ALARM lamp is blinking Refer to Section 4.6 The problem occurs during printing.
  • Page 219: Tips For Preventing Image Problems

    4.4.04 Tips for Preventing Image Problems 1. Make sure that the ribbon is not "dried out". If the printer output is faded, install a new ribbon, then print another sample. 2. Make sure that the paper you are using is within specifications. Paper specifications can be found in Section 1 of this Service Handbook.
  • Page 220: Common Problems

    4.4.05 Common Problems 1. Nothing happens when the printer is powered ON. Make sure the printer is plugged in. Check the power cord connection to the printer and the outlet. If a power strip is being used, make sure the strip is powered ON. 2.
  • Page 221 6. The ALARM lamp is blinking. The bail is open. Close it. The paper or ribbon is jammed. Clear the paper path. Thread the ribbon correctly. The printhead cannot move. Clear the obstruction. 7. Static electricity causes the paper to stick. In cold, dry weather, static charges can build up on continuous-form paper.
  • Page 222 9. FONT, PRINT QUALITY, and CHARACTER PITCH (on the operator panel) do not work. The Operator Panel Function Item in the Printer Menu can be set to enable (FULL OPERATION) or disable (LIMITED OPERATION) these features. If the printer is part of a customized system or if it is used by different operators, a system manager may be using this feature to maintain proper print settings.
  • Page 223 11. Strange symbols and incorrect fonts appear during a print run. The printer driver does not agree with the emulation selected for the printer. Incorrect printer commands are embedded within the software. To check the selected emulation, follow this procedure. Verify that the printer is loaded with paper.
  • Page 224: Epson / Ibm, Self Test Revision 1.16 (Fco 7681)

    Epson / IBM, Self Test Revision 1.16 (FCO 7681) NOTE: This information is also provided in Technical Service Bulletin 3201. Technical Service Bulletin 3201 covers Field Change Order 7681. The Microline 393 / 393C Epson IBM printers may experience a premature power supply failure as a result of the graphics speed running above the specified duty cycle.
  • Page 225: Missing Spaces When Printing Wide Reports (Fco 7693)

    Missing Spaces When Printing Wide Reports (FCO 7693) NOTE: This information is also provided in Technical Service Bulletin 3203. Technical Service Bulletin 3203 covers Field Change Order 7693. When printing "wide" reports in letter quality mode, columns may be misaligned. The alignment problem is caused by missing (dropped) spaces.
  • Page 226: Self Test Revisions 1.07 And 1.10 (Fco 7730)

    Technical Service Bulletin 3209 covers Field Change Order 7730. Microline 393 / 393C-Plus Epson / IBM self test revisions 1.07 and 1.10 print a copy right notice (Copyright 1989 Oki Electric Ind. LTD and Bitstream Inc.) while printing data. Self test revision 2.04 exhibits error code 47.
  • Page 227: Parallel Timing Specification Changes

    Parallel Timing Specification Changes NOTE: This information is also provided in Technical Service Bulletin 3210. Firmware Revision 2.04 and above provides better compatibility between the Microline 393-Plus and Microline 393C-Plus printers and high speed computers and / or non-DOS operating systems. The firmware changes the parallel interface timing specification.
  • Page 228: Jumper Sp2 Added To Main Control Board

    Jumper SP2 Added to Main Control Board NOTE: This information is also provided in Technical Service Bulletin 3211. The Slave ROM Q17 has been changed to a Masked CPU Q11. All IC’s are located on the main control board. Jumper Plug SP3 should be open for the Microline 393-Plus. Jumper Plug SP3 should be shorted for the Microline 393C-Plus.
  • Page 229: Font Name Changes In Menu Mode

    Font Name Changes in Menu Mode NOTE: This information is also provided in Technical Service Bulletin 3212. The changes listed below have been made to the Menu Mode font names. TMS Roman became Dutch. Helvette became Swiss. The Slave ROM Q17 became a Masked CPU Q11. All IC’s are located on the main control board.
  • Page 230: Modifications To Q6, Main Control Board

    Modifications to Q6, Main Control Board NOTE: This information is also provided in Technical Service Bulletin 3213. The main control board has been modified. EPROM socket location Q6 accepts four additional pins. Either a 28 pin EPROM or a 32 pin Masked ROM may be installed with no changes and full compatibility.
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  • Page 232: Abnormal Output

    ABNORMAL OUTPUT 4.5.01 Output Samples Uneven Print Density Smeared Print Light Print on the Entire Page Inconsistent Line Feed Drifting Margin 4-5-01a.pcx Failure Analysis 4 - 22 Microline 393 / 393C-Plus Service Handbook P/N 59241602...
  • Page 233: Light Print On The Entire Page

    Light Print on the Entire Page Possible Causes Ribbon is "dried out". Replace the ribbon. • Head gap lever is in the incorrect position. Place the lever in correct position. • Paper is not within specification. Refer to Section One for paper specification. •...
  • Page 234: Fault Alarms

    FAULT ALARMS 4.6.01 General Information When an error condition exists, the ALARM LAMP will flash. The operator panel is used to display printer error conditions. The type of error condition can be determined by decoding the operator panel lamps. Refer to the Alarm Codes Table in this section to identify both the error condition and the recommended corrective action for each condition.
  • Page 235: Alarm Codes Table

    Alarm Codes Table Print Quality Character Pitch Alarm Description Alarm Corrective Action Code NLQ UTL PROP MPU Internal RAM Error Replace control board Program ROM Error Replace Master ROM Resident CG Error Replace control board Slave ROM/RAM Error Replace Slave ROM Slave/Master Matching Error Replace Master/Slave ROM External RAM Error...
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  • Page 237: Repair Analysis Procedures (Raps)

    REPAIR ANALYSIS PROCEDURES (RAPs) 4.7.01 Using the RAPs When using the Repair Analysis Procedures, follow these steps. 1. Go to the RAP Index. 2. Find the RAP which is associated with the printer’s problem. 3. Go to the appropriate RAP. 4.
  • Page 238: Rap 01: Power Lamp Does Not Light

    RAP 01: Power Lamp Does Not Light NOTE: If the printer operates normally, but the POWER LAMP does not light, replace the Operator Panel. Refer to Appendix A for voltage test points and connector locations. START Is the AC cable connected to an AC outlet and the printer? Connect the AC cable.
  • Page 239: Rap 02: Space Error (Alarm 57)

    RAP 02: Space Error (ALARM 57) START Is the carriage assembly binding or jammed? Check around the space motor mechanism for any obstructions. Then, remove the cause of the carriage jam. Go to Step A. Has the problem been resolved? End of procedure.
  • Page 240: Rap 03: Head Homing Error (Alarm 53)

    RAP 03: Head Homing Error (ALARM 53) START Is +38 vdc present on the control board? Check for an open fuse on control board. Is connector CN1 on the control board correctly installed? Replace the control board. Correctly install the connector. Has the problem been resolved? End of procedure.
  • Page 241: Rap 04: Ribbon Homing Error (Alarm 5B)

    RAP 04: Ribbon Homing Error (ALARM 5B) START Is the printer the color model? Is shorting plug SP3 of the control board open? Set it open. Go to A. Manually rotate the ribbon shift cam counterclockwise. Does it rotate smoothly? Check the areas listed below.
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  • Page 243: Rap 05: Bail Home Error (Alarm 5C)

    RAP 05: Bail Home Error (ALARM 5C) START Manually rotate the bail open gear counterclockwise. Does it rotate smoothly? Perform the following. Remove any paper scrap or foreign material near the bail/ribbon motor gear, idle gear and bail open gear. Check the meshing of each of the above gears.
  • Page 244: Rap 06: Wrong Character, Character Omission, Or Dot Omission

    RAP 06: Wrong Character, Character Omission, or Dot Omission START Are cables CN2 and CN6 on the control board connected correctly? Connect them correctly. Is cable CN101 on the interface connector board connected correctly? Connect it correctly. Is the interface cable connected correctly? Connect it correctly Are the +/- 8 vdc output voltages supplied by the control board? Check at both ends of C9 for the positive voltage.
  • Page 245 Replace the Program and Slave ROMs on the control board. Has the problem been resolved? End of procedure. Replace the control board. Has the problem been resolved? End of procedure. Are the cables connected to CN2 and CN6 on the control board damaged? Replace the cables.
  • Page 246: Rap 07: Ribbon Feed Trouble

    RAP 07: Ribbon Feed Trouble START Remove the ribbon cartridge and rotate the ribbon cartridge ribbon feed knob. Does it rotate smoothly? Check to see if the ribbon lock mechanism has been disengaged. Replace the ribbon cartridge. Manually shift the carriage to the left and to the right. Does the ribbon feed shaft rotate? Replace the ribbon feed assembly.
  • Page 247: Rap 08: Line Feed Trouble

    RAP 08: Line Feed Trouble START Manually rotate the platen knob. Does it rotate smoothly? Set the release lever to the open side. Does the platen knob rotate smoothly? Adjust the mini-pitch belt tension. Perform the following. Check for correct phasing of push tractor (left or right). Replace the push tractor (left or right).
  • Page 248: Rap 09: Malfunction Of Operator Panel Switch

    RAP 09: Malfunction of Operator Panel Switch START Is cable CN1 on the operator panel connected correctly? Connect it correctly. Is cable CN10 on the operator panel connected correctly? Connect it correctly. Replace the operator panel. Has the problem been resolved? End of procedure.
  • Page 249: Rap 10A: Data Receive Failure

    RAP 10A: Data Receive Failure START Is the SELECT lamp blinking? Modify the menu to Ignore DC3. Is the ALARM lamp ON? Refer to RAP 10D. Is the SELECT lamp ON? Place the printer ON-LINE. Is the interface cable connected correctly? Connect it correctly.
  • Page 250: Rap 10B: Parallel Interface Problem

    RAP 10B: Parallel Interface Problem START Replace the Master and Slave Program ROMs. Has the problem been resolved? End of procedure. Replace the control board. Has the problem been resolved? End of procedure. Perform the following: Replace the interface connector board. Replace the cable connected to CN6 on the control board.
  • Page 251: Rap 10C: Serial Interface Problem

    RAP 10C: Serial Interface Problem START Correctly set the interface menu parameters. Baud rate. Character format. Protocol. Busy signal polarity. Has the problem been resolved? End of procedure. Are +/-8 vdc outputs provided on the control board? Check at both ends of C9 for the positive voltage. Check at both ends of C8 for the negative voltage.
  • Page 252: Rap 10D: Data Receive Failure (Alarm Light Lit)

    RAP 10D: Data Receive Failure (Alarm Light Lit) START Remove the upper cover. Press and hold the cover open microswitch while powering ON the printer. Does the alarm lamp come on? Perform the operations listed below. Correctly connect cable CN13 on the control board. Check the alignment between the front access cover and the COVER OPEN switch.
  • Page 253 Does the release lever microswitch function correctly? Perform the operations listed below. Correctly connect cable CN9 on the main control board. Replace the release lever, microswitch, and cable assembly. Replace the control board. Has the problem been resolved? End of procedure. Contact Okidata Technical Support.
  • Page 254: Rap 11: Color Ribbon Shift Problem

    RAP 11: Color Ribbon Shift Problem START Does the ribbon shift mechanism operate properly? Go to A. Is BLACK RIBBON set on the menu? Go to B. Set another color. Has the problem been resolved? Go to B. End of procedure. Is the ribbon installed properly? Correct the ribbon installation.
  • Page 255 Check the parts listed below. Shoulder screw Ribbon shift arm and spring Roller lever Ribbon cartridge balance spring Are they normal? Correct the installation or replace the defective assembly. Check the parts listed below. Ribbon shift cam and gear Ribbon shift cam/lever assembly Has the problem been resolved? End of procedure.
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  • Page 257: Printer Tests

    PRINTER TESTS 4.8.01 General Information This section covers the tests listed below. Rolling ASCII Test • • Font Test • Serial Interface Loopback Test • Hexadecimal Dump Mode The Rolling ASCII and Font Tests check print operations. The Serial Interface Loopback Test checks the operation of the serial interface board. The Hexadecimal Dump Mode checks the data transfer between the computer and printer.
  • Page 258: Rolling Ascii Print Test

    4.8.02 Rolling ASCII Print Test General Information The Rolling ASCII Print Test is a continuous printout of all 96 ASCII characters. The type style set in the printer menu will be utilized. Use this test to check the items listed below. Print Quality Across the entire length of a line Down the entire page...
  • Page 259 Rolling ASCII Print Test Sample 4-6-01.pcx Microline 393 / 393C-Plus 4 - 49 Failure Analysis Service Handbook P/N 59241602...
  • Page 260: Font Test

    4.8.03 Font Test General Information This test will print samples of the available fonts. The standard fonts are listed below. The cartridge fonts will depend on the cartridge installed. LQ - ROMAN 10 cpi, Proportional, Super / Subscript LQ - SWISS 10 cpi, Proportional, Super / Subscript LQ - COURIER 10 cpi,12 cpi, 15 cpi, 17.1 cpi, 20 cpi, Proportional, Super / Subscript LQ - ORATOR 10 cpi, 12 cpi, Super / Subscript LQ - 12 cpi...
  • Page 261: Font Test Sample

    Font Test Sample 4-6-02.pcx Microline 393 / 393C-Plus 4 - 51 Failure Analysis Service Handbook P/N 59241602...
  • Page 262: Serial Interface - Loopback Test

    4.8.04 Serial Interface - Loopback Test NOTE: In order to run this test, a serial loopback test connector must be attached to the printer’s serial port. Procedure 1. Place the printer in the Serial Diagnostic Mode Set the DIAGNOSTIC TEST menu item to YES. 2.
  • Page 263: Serial Loopback Plug Diagram

    Serial Loopback Plug Diagram 4-6-03.pcx Loopback Connector Configuration 1. Jumper the following pins together. Pin 2 to Pin 3 Pin 4 to Pin 5 Pin 8 to Pin 11 Pin 6 to Pin 20 RS232-C Serial Loopback Test Connector (DB25P Plug) 4-8-04.tif Microline 393 / 393C-Plus 4 - 53...
  • Page 264: Serial Cable Information

    Serial Cable Information The information in this section will help you make a serial cable to connect between the printer and computer. Refer to the computer documentation to determine the cable requirements on the computers end. The printer has the following cable requirements. •...
  • Page 265: Ibm 25-Pin Cable Configuration

    Commonly Used Serial Cable Configurations IBM 25-Pin Cable Configuration Computer Printer IBM 9-Pin Cable Configuration Computer Printer Microline 393 / 393C-Plus 4 - 55 Failure Analysis Service Handbook P/N 59241602...
  • Page 266: Hexadecimal Dump

    4.8.05 Hexadecimal Dump General Information Hexadecimal Dump Mode allows you to test the data being sent from the computer to the printer. When the printer is in Hex Dump Mode, all data received (including text and printer commands) will be printed in both hexadecimal and ASCII format. NOTE: In ASCII format, all non-printable characters are represented by a period.
  • Page 267: Sample

    Sample 4-8-05.tif Microline 393 / 393C-Plus 4 - 57 Failure Analysis Service Handbook P/N 59241602...
  • Page 268: Resistance Checks

    RESISTANCE CHECKS 4.9.01 General Information The following resistance charts are included in this section. Printhead Resistance Line Feed Motor Resistance Space Motor Resistance Ribbon Motor Resistance Failure Analysis 4 - 58 Microline 393 / 393C-Plus Service Handbook P/N 59241602...
  • Page 269 4-9-01.pcx Microline 393 / 393C-Plus 4 - 59 Failure Analysis Service Handbook P/N 59241602...
  • Page 270: Printhead Resistance Check

    4.9.02 Printhead Resistance Check The resistance of each coil should be about 4.5 ohms. 4-9-02.pcx Failure Analysis 4 - 60 Microline 393 / 393C-Plus Service Handbook P/N 59241602...
  • Page 271: Line Feed Motor Resistance Check

    4.9.03 Line Feed Motor Resistance Check The resistance of each coil should be about 5.6 ohms. 4-9-03.pcx Microline 393 / 393C-Plus 4 - 61 Failure Analysis Service Handbook P/N 59241602...
  • Page 272: Space Motor Resistance Check

    4.9.04 Space Motor Resistance Check The resistance of the motor should be about 11.4 ohms. 4-9-04.pcx Failure Analysis 4 - 62 Microline 393 / 393C-Plus Service Handbook P/N 59241602...
  • Page 273: Ribbon Motor Resistance Check

    4.9.05 Ribbon Motor Resistance Check The resistance of each coil should be about 34 ohms 4-9-05.pcx Microline 393 / 393C-Plus 4 - 63 Failure Analysis Service Handbook P/N 59241602...
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  • Page 275: Appendix Aboard Diagrams

    APPENDIX A BOARD DIAGRAMS...
  • Page 277: Overview

    OVERVIEW A.1.01 General Information This section describes the characteristics of the printed circuit boards used in the unit. The following areas are covered. Firmware Fuses Jumpers Sensors Switches Test Points Where an item is not applicable, the word NONE will be listed. Microline 393 / 393C-Plus A - 1 Board Diagrams...
  • Page 278 INDEX TO CHARTS Description Board Designation Section Main Control Board LQEM A.2.01 Power Supply A.2.02 Interface Connection Assembly LQPN A.2.03 Sensor Board LQEW or LPRW A.2.04 Operator Panel Board LQSX A.2.05 Board Diagrams A - 2 Microline 393 / 393C-Plus Service Handbook P/N 59241602...
  • Page 279 A-2-00.pcx Microline 393 / 393C-Plus A - 3 Board Diagrams Service Handbook P/N 59241602...
  • Page 280: Main Control Board (Lqem

    A.2.01 Main Control Board (LQEM) Firmware Q6 - Program ROM of Master MPU Q7 - Character Generator ROM Q17 - Program Rom of Slave MPU Fuses F1 2.0 Amp 125V Jumpers SP1: OPEN - Internal ROM SHORTED - External ROM OPEN - Monochrome Model SHORTED - Color Model Sensors...
  • Page 281 A-2-01.pcx Microline 393 / 393C-Plus A - 5 Board Diagrams Service Handbook P/N 59241602...
  • Page 282: Power Supply

    A.2.02 Power Supply Firmware NONE Fuses F1 10.0 Amp 125V Jumpers NONE Sensors NONE Switches NONE Test Points CN - 1 Pin 6 +38vdc CN - 2 Pin 6 +8vdc Pin 7 -8vdc Pin 4 +5vdc Pin 2 Signal Ground Pin 3 Signal Ground Board Diagrams A - 6...
  • Page 283 A-2-02.pcx Microline 393 / 393C-Plus A - 7 Board Diagrams Service Handbook P/N 59241602...
  • Page 284: Interface Board (Lqpn

    A.2.03 Interface Board (LQPN) Fuses NONE Jumpers SP101 A Side: Auto Feed XT signal of Centronics interface valid B Side: Auto Feed XT signal of Centronics interface invalid SP102 A Side: I-Prime Signal of Centronics interface is valid B Side: I-Prime Signal of Centronics interface is invalid SP103 A Side: +5 vdc is output to pin 18 of Centronics interface.
  • Page 285 A-2-03.pcx Microline 393 / 393C-Plus A - 9 Board Diagrams Service Handbook P/N 59241602...
  • Page 286: Sensor Board (Lqew Or Lprw

    A.2.04 Sensor Board (LQEW or LPRW) Firmware NONE Fuses NONE Jumpers NONE Sensors Bottom Paper Sensor Bail Arm Sensor Ribbon Shift Sensor Located on sensor board in color model only Connector for Friction Feed Paper Photosensor (located on the Paper Pressure Guide) Switches NONE...
  • Page 287 Microline 393C-Plus only A-2-04.pcx Microline 393 / 393C-Plus A - 11 Board Diagrams Service Handbook P/N 59241602...
  • Page 288: Operator Panel Board (Lqsx

    A.2.05 Operator Panel Board (LQSX) Firmware NONE Fuses NONE Jumpers NONE Sensors NONE Switches NONE Test Points NONE Board Diagrams A - 12 Microline 393 / 393C-Plus Service Handbook P/N 59241602...
  • Page 289 A-2-05.pcx Microline 393 / 393C-Plus A - 13 Board Diagrams Service Handbook P/N 59241602...
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  • Page 291: Appendix B: Illustrated Parts Listing

    APPENDIX B ILLUSTRATED PARTS LISTING...
  • Page 293: Overview

    OVERVIEW B.1.01 General Information This appendix will assist you in identifying the assemblies and parts of the product. Use Section Four (Failure Analysis) to determine the defective part(s). Locate the part and its part number in this section. Appendix B is cross-referenced to Section Three (Maintenance). Microline 393 / 393C-Plus B - 1 Illustrated Parts Listing...
  • Page 294: Format

    Format The format for this appendix is a series of tables with diagrams. The tables contain the item reference number, the Okidata and Oki-Japan (Oki-J) part numbers, the part description, a comments section, and the disassembly procedure. Item Okidata P/N...
  • Page 295: Current Part Numbers

    Current Part Numbers Okidata has made every effort to include current part numbers in this Service Handbook at the time of publishing. However, technical information frequently changes. These changes often include new or modified parts, with new or modified part numbers. Please refer to the following resources for current part numbers and pricing.
  • Page 296: Definition Of Terms

    B.1.02 Definition of Terms Assemblies Assemblies are parts grouped under a single description and/or part number. Generally, individual items in an assembly are not available from Okidata. Assemblies are surrounded by broken line boxes in the diagrams. Assemblies will say "Includes xx xx" under the Comments section of the tables. Parts in assemblies will say "Part of xx"...
  • Page 297: Technical Service Bulletins

    Technical Service Bulletins Technical Service Bulletins (TSBs) are also referred to as Okidata’s monthly mail. The TSBs contain the latest information on firmware revisions, procedure changes, and technical information updates. Okidata distributes the TSBs through Okilink II. The TSBs are issued monthly. Microline 393 / 393C-Plus B - 5 Illustrated Parts Listing...
  • Page 298: Parts Ordering Information

    B.1.03 Parts Ordering Information Service Center Reference Guide When a technician has successfully completed a Service Training Course for a product and the Dealer has become Service Authorized, an information package is provided to the Dealer. The Okidata Service Center Reference Guide outlines the following items. •...
  • Page 299: Placing A Parts Order

    Placing a Parts Order All authorized Okidata resellers may order spare parts and consumables for Okidata products. Orders are placed through Okidata’s Order Processing Center Department. Please refer to your Service Center Reference Guide for details on ordering parts. You should have the following information available before you place your order. •...
  • Page 300 This page was intentionally left blank. Illustrated Parts Listing B - 8 Microline 393 / 393C-Plus Service Handbook P/N 59241602...
  • Page 301: Charts

    CHARTS Below is an index to the illustrated parts breakdown charts. Description Section Printer Unit B.2.01 Upper Cover Assembly B.2.02 Printer Unit General Assembly (1 of 2) B.2.03 Printer Unit General Assembly (2 of 2) B.2.04 Operator Panel Assembly B.2.05 Printer Mechanism - Monochrome (1 of 3) B.2.06 Printer Mechanism - Monochrome (2 of 3)
  • Page 302 Printer Unit Part numbers are subject to change. Refer to Okilink II for current part numbers and pricing information. Item Okidata P/N Description Comments Disassembly Oki-J P/N Refer to B.1.02 Procedure 62405001 Printer: Microline 393 Epson Black 120 V 62405002...
  • Page 303 B-2-01.pcx Microline 393 / 393C-Plus B - 11 Illustrated Parts Listing Service Handbook P/N 59241602...
  • Page 304 B.2.02 Upper Cover Assembly Part numbers are subject to change. Refer to Okilink II for current part numbers and pricing information. Item Okidata P/N Description Comments Disassembly Oki-J P/N Refer to B.1.02 Procedure 50212427 Cover: Middle (ML393+) RSPL 3.2.04 2PA4016-4723G27...
  • Page 305 2, 85 1, 86 B-2-02.pcx Microline 393 / 393C-Plus B - 13 Illustrated Parts Listing Service Handbook P/N 59241602...
  • Page 306 Printer Unit General Assembly (1 of 2) Part numbers are subject to change. Refer to Okilink II for current part numbers and pricing information. Item Okidata P/N Description Comments Disassembly Oki-J P/N Refer to B.1.02 Procedure 50054202 Printhead: (Mylar Comp) RSPL 3.2.01...
  • Page 307 104, 105, 106 14, 15 12, 84, 103, 187 61, 62, 63 B-2-04.pcx Microline 393 / 393C-Plus B - 15 Illustrated Parts Listing Service Handbook P/N 59241602...
  • Page 308 Printer Unit General Assembly (2 of 2) Part numbers are subject to change. Refer to Okilink II for current part numbers and pricing information. Item Okidata P/N Description Comments Disassembly Oki-J P/N Refer to B.1.02 Procedure 84 * * 55050412 PCB: Main (LQEM-2) RSPL 3.2.06...
  • Page 309 104, 105, 106 14, 15 12, 84, 103, 187 61, 62, 63 B-2-04.pcx Microline 393 / 393C-Plus B - 17 Illustrated Parts Listing Service Handbook P/N 59241602...
  • Page 310 Operator Panel Assembly Part numbers are subject to change. Refer to Okilink II for current part numbers and pricing information. Item Okidata P/N Description Comments Disassembly Oki-J P/N Refer to B.1.02 Procedure 55050601 PCB: Operator Panel (LQSX) RSPL 3.2.05 4YA4042-1473G1...
  • Page 311 B-2-05.pcx Microline 393 / 393C-Plus B - 19 Illustrated Parts Listing Service Handbook P/N 59241602...
  • Page 312 Printer Mechanism - Monochrome (1 of 3) Part numbers are subject to change. Refer to Okilink II for current part numbers and pricing information. Item Okidata P/N Description Comments Disassembly Oki-J P/N Refer to B.1.02 Procedure 55050501 PCB: Sensor (LQEW or LPRW) RSPL 3.2.12...
  • Page 313 99 44...
  • Page 314 Printer Mechanism - Monochrome (2 of 3) Part numbers are subject to change. Refer to Okilink II for current part numbers and pricing information. Item Okidata P/N Description Comments Disassembly Oki-J P/N Refer to B.1.02 Procedure 53063801 Bracket: PH Gap Indication 3.2.20 3PP4043-4224P1...
  • Page 315 99 44...
  • Page 316 Printer Mechanism - Monochrome (3 of 3) Part numbers are subject to change. Refer to Okilink II for current part numbers and pricing information. Item Okidata P/N Description Comments Disassembly Oki-J P/N Refer to B.1.02 Procedure 50512923 Rubber Grommet (in base) RSPL 3.2.08...
  • Page 317 99 44...
  • Page 318 Printer Mechanism - Color (1 of 3) Part numbers are subject to change. Refer to Okilink II for current part numbers and pricing information. Item Okidata P/N Description Comments Disassembly Oki-J P/N Refer to B.1.02 Procedure 56619101 Cable: Sensor Board Connection RSPL 3.2.12...
  • Page 320 Printer Mechanism - Color (2 of 3) Part numbers are subject to change. Refer to Okilink II for current part numbers and pricing information. Item Okidata P/N Description Comments Disassembly Oki-J P/N Refer to B.1.02 Procedure 50910305 Spring: Idle Gear RSPL 3.2.09...
  • Page 322 Printer Mechanism - Color (3 of 3) Part numbers are subject to change. Refer to Okilink II for current part numbers and pricing information. Item Okidata P/N Description Comments Disassembly Oki-J P/N Refer to B.1.02 Procedure 50512923 Rubber Grommet (in base) RSPL 3.2.08...
  • Page 324: Carriage Assembly - Monochrome

    Carriage Assembly - Monochrome Part numbers are subject to change. Refer to Okilink II for current part numbers and pricing information. Item Okidata P/N Description Comments Disassembly Oki-J P/N Refer to B.1.02 Procedure 51303101 Belt: Mini Pitch (Space) RSPL 3.2.15...
  • Page 325 B-2-12.pcx Microline 393 / 393C-Plus B - 33 Illustrated Parts Listing Service Handbook P/N 59241602...
  • Page 326: Carriage Assembly - Color

    Carriage Assembly - Color Part numbers are subject to change. Refer to Okilink II for current part numbers and pricing information. Item Okidata P/N Description Comments Disassembly Oki-J P/N Refer to B.1.02 Procedure 51303101 Belt: Mini Pitch (Space) RSPL 3.2.15...
  • Page 327 B-2-13.pcx Microline 393 / 393C-Plus B - 35 Illustrated Parts Listing Service Handbook P/N 59241602...
  • Page 328: Options

    B.2.14 Options Part numbers are subject to change. Refer to Okilink II for current part numbers and pricing information. Item Okidata P/N Description Comments Disassembly Oki-J P/N Refer to B.1.02 Procedure 70011701 Pull Tractor Assembly w/ Acoustic Option 2PA4016-4722G4 Cover...
  • Page 329 132, 133 61, 62, 63, 130 Not Shown: 121, 122, 124, 134, and 137 B-2-15.pcx Microline 393 / 393C-Plus B - 37 Illustrated Parts Listing Service Handbook P/N 59241602...
  • Page 330: Pull Tractor Assembly (Option

    Pull Tractor Assembly (Option) Part numbers are subject to change. Refer to Okilink II for current part numbers and pricing information. Item Okidata P/N Description Comments Disassembly Oki-J P/N Refer to B.1.02 Procedure 50057401 Tractor: Pin (Left) Pull Tractor Option 4PA4043-2684G1...
  • Page 331 173 176 B-2-14.pcx Microline 393 / 393C-Plus B - 39 Illustrated Parts Listing Service Handbook P/N 59241602...
  • Page 332: Packing Materials

    B.2.16 Packing Materials Part numbers are subject to change. Refer to Okilink II for current part numbers and pricing information. Item Okidata P/N Description Comments Disassembly Oki-J P/N Refer to B.1.02 Procedure 53460209 Overpack ML393+ 53477201 Box: ML393 Epson 53477202...
  • Page 333 141, 143 142, 144 141, 143 142, 144 139, 140, 145, and 146 Not Shown 138 and 147 B-2-16.pcx Microline 393 / 393C-Plus B - 41 Illustrated Parts Listing Service Handbook P/N 59241602...
  • Page 334: Consumables

    B.2.17 Consumables Part numbers are subject to change. Refer to Okilink II for current part numbers and pricing information. Item Okidata P/N Description Comments Disassembly Oki-J P/N Refer to B.1.02 Procedure 52103601 Cartridge: Ribbon (Black) Consumable 3.2.01 52103701 Cartridge: Ribbon (Color) Consumable 3.2.01...
  • Page 335 B-2-17.pcx Microline 393 / 393C-Plus B - 43 Illustrated Parts Listing Service Handbook P/N 59241602...
  • Page 336: Documentation

    Documentation Part numbers are subject to change. Refer to Okilink II for current part numbers and pricing information. Item Okidata P/N Description Comments Disassembly Oki-J P/N Refer to B.1.02 Procedure 1 A # 58214701D Kit: Service Training Microline 393 Document...
  • Page 337 Item Okidata P/N Description Comments Disassembly Oki-J P/N Refer to B.1.02 Procedure 58067201 ABCD Warranty Claim Forms Document (Pkg of 20) Both 198 * Marketing Literature Document Both 199 ** Okidata Marketing Literature Order Document Form Both Okidata Service Center Reference...
  • Page 338: Service Training Kit Revision List

    Except for the Customer Service, Reference, and Setup Guides and the Cut Sheet Feeder Maintenance Manual, items in the training kit are NOT available separately. Item Okidata P/N Description Comments Disassembly Oki-J P/N Refer to B.1.02 Procedure 58218601 Kit: Microline 393-Plus/393C-Plus Document Service Training...
  • Page 339 Except for the Reference and Setup Guides, items in the training kit are NOT available separately. Item Okidata P/N Description Comments Disassembly Oki-J P/N Refer to B.1.02 Procedure 58218602 Kit: Microline 393-Plus/393C-Plus Document Service Training Includes 2 - 7 C...
  • Page 340 Except for the Customer Service, Reference, and Setup Guides and the Cut Sheet Feeder Maintenance Manual, items in the training kit are NOT available separately. Item Okidata P/N Description Comments Disassembly Oki-J P/N Refer to B.1.02 Procedure 58215601 Kit: Service Training Microline 300 Document Series...
  • Page 341 P/N 59230701B Microline 390/391 Service Training Kit This kit was replaced by P/N 59230702. Item Okidata P/N Description Comments Disassembly Oki-J P/N Refer to B.1.02 Procedure 59230701B Kit: Service Training Microline Document 390/391 Includes 2 - 8 Z 58045401 Cover Letter: Microline 390/391...
  • Page 342 This page was intentionally left blank. Illustrated Parts Listing B - 50 Microline 393 / 393C-Plus Service Handbook P/N 59241602...
  • Page 343: Appendix C: Microline 393/393C Specifications

    APPENDIX C MICROLINE 393/393C SPECIFICATIONS...
  • Page 345: Overview

    OVERVIEW C.1.01 General Information This appendix covers the specifications for the Microline 393 and Microline 393C printers. This information is provided for those technicians who work with these models. The Microline 393 and Microline 393C are high speed, dot matrix printers, which utilize a 24-pin printhead.
  • Page 346: Printer Specifications

    PRINTER SPECIFICATIONS C.2.01 Interface Methods Both are available Centronics Parallel Interface RS232-C Serial Interface C.2.02 Line Feed Increments 1/6" 1/8" n/60" n/180" n/360" C.2.03 Line Feed Time 55 ms @ 6 LPI 8.0 IPS (inches per second) slew rate @ gap 1,2 6.0 IPS (inches per second) slew rate @ gap 3+ C.2.04 Paper Feed Method...
  • Page 347: Paper Path

    C.2.06 Paper Path Bottom Feed Rear Feed Top Feed C.2.07 Printhead Type Staggered, 24 pin, stored energy printhead C.2.08 Standard Fonts Utility (Used in Utility and High SPeed Draft Modes Courier Helvette Roman Orator C.2.09 Symbol Sets Standard ASCII Epson Character Set IBM Character Set I and Set II IBM Proprinter All Character Set International Characters...
  • Page 348: Paper Specifications

    PAPER SPECIFICATIONS C.3.01 Types Letter Legal Labels - Bottom feed only Continuous Forms C.3.02 Weight 12 - 24 lb. 16 - 24 lbs (Cut Sheet Feeders) C.3.03 Number of Copies PHYSICAL SPECIFICATIONS C.4.01 Printer Dimensions Width: 16.42" Height: 7.09" Depth: 22.44" C.4.02 Printer Weight 37 lbs.
  • Page 349: Power Requirements

    POWER REQUIREMENTS C.5.01 Input Power Input Voltage 120 VAC +10%, -15% 220/240 +10%, -15% Frequency 50/60 hz. +/-2% C.5.02 Power Consumption 180 VA during Self-Test ENVIRONMENTAL CONDITIONS C.6.01 Ambient Temperature and Relative Humidity While in operation: 41°F to 104°F @ 20% - 80 % Relative Humidity While in storage: -40°F to 158°F @ 5% - 95% Relative Humidity C.6.02 Printer Noise Level (10 cpi - LQ Mode)
  • Page 350: Agency Approvals

    AGENCY APPROVALS C.7.01 Listings North America FCC Class B UL 478 (Office Machines and Business Equipment) CSA 22.2 154 OPTIONS C.8.01 Font Cartridges Prestige Gothic C.8.02 RAM Cartridge 32 Kbytes C.8.03 Cut Sheet Feeders CSF 3001 - Single bin Cut Sheet Feeder CSF 3002 - Dual bin Cut Sheet Feeder C.8.04 Pull Tractor Assembly...
  • Page 351: Consumables

    CONSUMABLES C.9.01 Ribbon Black Cartridge (Microline 393 and Microline 393C) Type: Fabric Ribbon Ribbon Life: 5 million characters Color Cartridge (Microline 393C) Type: Four band color ribbon (Yellow, Magenta, Cyan, Black) Black: 2.3 million characters Ribbon Life Cyan: 1.8 million characters Ribbon Life Magenta: 1.8 million characters Ribbon Life Yellow: 1.3 million characters Ribbon Life Microline 393 / 393C-Plus...
  • Page 352: C.10 Memory Specifications

    C.10 MEMORY SPECIFICATIONS C.10.01 Resident: Program ROM = 128 Kbytes Resident Fonts = 384 Kbytes Optional Font Cartridges = 64 Kbytes each C.10.02 Total RAM = 64 Kbytes Print Buffer = 23 Kbytes IBM I/F Buffer = 0 Kbyte minimum Epson I/F Buffer = 8 Kbyte minimum DLL Buffer = 0 to 32 Kbytes C.10.03...
  • Page 354 Microline 393 / 393C-Plus Service Handbook P/N 59241602...

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