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Oki Microline 390, Maintenance Manual, Page: 141 / 174

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Oki Microline 390 Maintenance Manual Download Page 141

Summary of Contents for Microline 390

Page 1: ...OK1 MICROLlI JE 3901391 Elite MA NTENANCE MANUAL...

Page 2: ...is maintenance manual describes field maintenance of the Microline 390 391 Elite printer and options for maintenance personnel For performance specifications and operating procedures refer to the User...

Page 3: ..._ __ __ 2 2 2 1 3 Unpackingtheaccessories ___ ____ __ _____________ ____ _ _ __ _ __ _ 2 3 2 2 Installation ____________ ______ _ ______ _ ____ __________________ __ 2 4 2 2 1 Precautionforinstallatio...

Page 4: ...Reversing continuoussheets 3 31 4 ASSEMBLY DISASSEMBLY 4 l 4 1 Precautions for Parts Replacement 4 l 4 2 MaintenanceTools 4 2 4 3 Disassembly Reassemblyof Procedure 4 3 4 3 1 Separatorassembly 4 4 4 3...

Page 5: ...40 5 ADJUSTMENT __ _ _ _ _ _ _ _ _ 5 1 5 1 Gap Between The Platen And Printhead 5 l 6 CLEANING AND LUBRICATION _ 6 1 6 1 Cleaning ________ ___ _ __ __ ___________________ _ 6 l 6 2 Lubrication _ ____...

Page 6: ...Flowchart _ _ _ _ _ _ _ E 5 M o d e __________ ________________________ ___ _ ___ __________ E 5 Mode __ _ _ _______ _ _____________ _ E 6 TROUBLESHOOTING FLOWCHART _ _ _ _ _ _ E 7 Before Repairing a...

Page 7: ...1 CONFIGURATION...

Page 8: ...FIGURATION 1 1 Standard Printer Configuration The standard configuration of the ML390 391 Elite is as follows py Platen knob Paperseparator Ribbon cassette perat smbly Figure l l Printer configuration...

Page 9: ...1 2 Options 1 Tractorfeed unit with acoustic cover 2 Cut sheet feeder unit with access cover...

Page 10: ...3 Super speed RS 232C serial interface board 4 Font memory card l 3...

Page 11: ...8 6 CPS 192 9 CPS 225 0 CPS 75 0 CPS 90 0 CPS 112 5 CPS 128 6 CPS 150 0 CPS Character sets Standard ASCII EPSON Character Set IBM Character Set I II IBM Proprinter Compatible Character Set Foreign Cha...

Page 12: ...h 0 356 mm or lesstotal thickness Number of sheets Ream weig ht Number of sheets Carbon lined paper Pressure sensitive paper interleaf paper paper carbon 9toll lb 35 to 40 g m IOtolZlb 38 to 45 g m2 9...

Page 13: ...5 x 11 inches 216 x 280 mm or less 1 3 3 Physical specifications 1 Outside dimensions ML390 Elite 15 67 inches 398 W x 4 57 inches I 16 H x 13 58 inches 345 D ML391 Elite 21 73 inches 552 W x4 57inch...

Page 14: ...nant frequency Non operating 1G 5 to 150 Hz or less except the unit is resonant frequency 3 Impact Drop test Packing 30 One corner and three edges and all six sides 1 3 6 Noise The 8 second average no...

Page 15: ...2 INSTALLATION PROCEDURE...

Page 16: ...2 INSTALLATION PROCEDURE 2 1 Unpacking 2 1 1 Unpacking the packing box 1 Unpackthepackingbox 2 Takeouttheprinterunit 3 Takeouttheaccessories Packing box 2 1...

Page 17: ...2 1 2 Unpacking the printer unit 1 Removethe printer unit from the polyethylene bag Polyethylene bag Printer unit 2 2...

Page 18: ...Unpacking the accessories 1 Remove the AC cable fuses paper separator platen knob ground screw and ribbon cassette from the polyethylene bag Paperseparator Polyethylene bag Ribbon cassette Platen kno...

Page 19: ...h heavy vibrations DO not smoke in the area where the printer is installed Adjust the temperature and humidity of the installation site as follows Temperature 41 to 104 F 5 to 40 C Humidity 20to90 RH...

Page 20: ...than 24 inches 60 cm at the rear of the printer to allow sufficient space for paper 4 To prevent incoming and outgoing forms from interfering with each other place the forms within 4to 6 inches 10 to...

Page 21: ...2 2 2 Removing the shipping retainer Remove the shipping retainer which secures the printhead from movement during shipping by opening the access cover Shipping retainer R 2 6...

Page 22: ...2 2 3 Installing the accessories 1 Install the sheet separator 2 Install the platen knob 3 Install the ribbon cassette Sheet separator knob Ribbon cassette...

Page 23: ...ng cables 1 Connect the interface cable 2 Connect the AC cable Make sure that the AC power switch on the right side of the printer is set to OFF side the side marked with 0 Interface cable To the host...

Page 24: ...2 2 5 installing paper Install continbous form paper to test the unit Refer to User s Manual for Details 2 9...

Page 25: ...2 2 6 Powering on 1 Push the AC POWER switch on the right side of the printerto ON the side marked with I 2 Confirm that the POWER lamp goes on and the printhead returns to its home position 2 10...

Page 26: ...pressing the TOF QUIET switch press the POWER switch to ON 2 The rolling ASCII pattern as shown below will be printed 3 To finish the test press the MODE switch 4 The SEL lamp will go on indicating th...

Page 27: ...3 THEORY OF OPERATION...

Page 28: ...to the other electrical parts is distributed via the connectors in the control board 3 1 2 Microprocessor and its peripherals circuits 1 Microprocessor Q8 8OC154 The microprocessor is the nucleus of t...

Page 29: ...MSM6990 sends SSD RTS and DTR signals to the serial interface connector in synchronization with the WR signal c I O ports The MSM6990 Qll has a 12 bit output port and a lo bit input port It sends cont...

Page 30: ...se A and B signals from the spacing motor The pulse width of this drive differs according to the number of the impact pins Its duration can be preset by the CPU c Print data transfer control Performs...

Page 31: ...ESS 48 kbyte CN4 MSM79H097 i_J DMA HEAD DRIVE LF MOTOR CONTROL r IC _I 1 for SP MOTOR M 0 _________ _ POSITION I X X__ iF ARALLEL INTERFACE L OPTIONAL INTERFACE RS 232URS422 LF MOTOR M 0 PRINTHEAD WIT...

Page 32: ...m finally establishes the interface signals output level of ACK signal BUSY signal etc lights the SELECT indicator and informs the host computer that the printer is ready for data reception in the dat...

Page 33: ...is determined by the HD DV pulse width This pulse is developed by a RC circuit within the IC The pulse width of HD DV varies with the number of pins being driven The drive time is lengthened if a larg...

Page 34: ...signal is a fixed period pulse signal The pulse width is controllable by the program and is used to control the motor drive time The SP ON OFF signal is used to control acceleration and deceleration m...

Page 35: ...the photo sensor The motor control LSI 911 MSM6990 divides these edge pulse signals in accordance with the print pitch and sends the IPT signal to provide dot on timmg and carriage position detection...

Page 36: ...es the AC fuse to open when a fault occurs in the printhead drive circuit space motor drive circuit or their peripheral circuits thus preventing component failure For this purpose this circuit monitor...

Page 37: ...time For the period during whichprinthead temperature is higher than 130 For several tens seconds afterprinthead temperature fallen below 130 Each line is printed out being divided into three cycles w...

Page 38: ...levels by the DC power supply board and supplied to the control board 1 Filter board The filter board consists of the power switch AC fuse and AC noise filter 2 Power transformer If the internal temp...

Page 39: ...to a permanent magnet and the spring attached to the armature is compressed The print wires attached to each armature are thus concealed inside the wire guide When a signal for a character to be print...

Page 40: ...paper 1 When printing Armature assembly Printwire Thermistor Yoke Magnet assembly 2 When not printing Figure 3 3 3 13...

Page 41: ...rriage frame which slides over the shaft A DC motor which is mounted on the bottom surface of the carriage frame is used to move the carriage frame The spacing mechanism consists of the following item...

Page 42: ...motor gear rotates against the space rack moving the carriage from left to right For every revolution of the DC motor the carriage frame moves 0 8 of an inch 20 32 mm The encoder disk rotates togethe...

Page 43: ...adjusting screw can be turned with a screw driver to change the coarse gap adjustment When the adjusting lever is set to range 9 the contact which is attached to the under side of the carriage cover w...

Page 44: ...d Carriage shaft Adjusting gear Range from 0 to Ca Narrows Adjusting screw Printhead e Widens Range from 0 to Figure 3 5 3 17...

Page 45: ...e direction feed is used Ink is supplied from an ink tank which is built in to the ribbon cartridge 2 Ribbon feed operation When the space motor is activated the ribbon gear rotates The rotation is tr...

Page 46: ...Ribbon cartridge Ribbon drive gear assembly Rit Figure 3 6 3 19...

Page 47: ...eet feed operation See Figure 3 7 The pulse motor used for the paper feed mechanism is mounted on the left side of the printer frame and the rotation of the motor is transmitted through decelerating g...

Page 48: ...heet feed operation rotates tractor gear B through platen gear A the idler gear and the change gear The rotation of tractor gear 8 makes the pin tractor belt rotate through a sheet feeder shaft feedin...

Page 49: ...the arrow As the power transmission from the idler gear to tractor gear is removed the pin tractor becomes inoperative Continuous form Figure 3 9 Cut sheets are fed by the rotation of the platen but...

Page 50: ...ontinuous form Sheet feeder shaft Figure 3 10 The rotation of the platen is transmitted to the idler gear of the pull tractor unit through the platen gear at the left end of the platen The rotation of...

Page 51: ...ll tractor Sheets are fed by these two tractors at the same time To remove slack from the sheets set the sheets according to the following procedure when using the push and pull tractors 1 Set the rel...

Page 52: ...se link rotates in a counter clockwise direction The release shaft which is engaged with this rotates in a counter clockwise direction at the same time A clearance is created between the pressure roll...

Page 53: ...e link rotates in a clockwise direction The release shaft which is engaged with this rotates clockwise at the same time The pressure roller is pressed against the platen by the pressure spring which i...

Page 54: ...guide the sensor lever is pushed up by the pressure and the paper end sensor is turned on If the paper is removed the tip B of the paper end lever B falls into the slot of the bottom paper guide At t...

Page 55: ...eet side rear side 2 Insert paper from behind the platen 3 Pull the bail arm forward to set it to the open state causing the SASF switch to be turned on 4 LF operation is started and paper will be fed...

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