Home

OKI ML395C Printer

1. Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com ma lt 4 P UDPCrmonmAaZoOnUAS a_i i h 15 00 S70 ODO 535 45HS59 0 TO Service Guide ML395 395C Chapter 1 Product Specifications Page 13 SC Dr orvekF On o cCOOLC OSL nBnwnXO5 a0 a0 mNHNROBOOOOCH_H gt rr ONZOoackrFwEorFoMoaaaw ro Eke mMFE_c3aswponBEaL_ortrH 50 ecnnoEo_ O gt OO rr omnan ana m ow O vu at amp 0 N coocos snBbauavLASsS s PORA voa OC HN x er orandnuin Ce LlCO O8T a He O NOO0O2 ____0CO0 OC lt 0 00 0 0_o0 gt 01 Dd O lt OX TCOURANOPAOZ H gt O TFO OH oEa p lt H5 0 00EQ VZN Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 14 de Service Guide ML395 395C OKIDATA Chapter 2 Principles of Operation 2 1 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 Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Busi
2. NOTES When assembling the printer Do not allow cables to get caught under the control board Insert the control board into the groove in the base tray 8 Place the control board into the groove 9 in the shield cover then attach the shield cover P N 55071811 PCB TFCB 1 w o ROM RSPL B 2 02 P N 55071812 PCB TFCB 2 w o ROM RSPL B 2 02 Color P N 56301703 Fuse 2A 125V RSPL B 2 02 5 P N 56619201 IF Main Board Connection 50P RSPL B 2 02 3 12 7 Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 41 a Y E Service Guide ML395 395C OKIDATA Chapter 3 Maintenance amp Disassembly 3 2 07 Interface Connector Board TFIF or 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 3 2 Disconnect connectors CN102 1 and CN103 2 3 Remove the two mounting screws 3 4 Lift the interface connector board 4 5 Detach connector CN101 5 6 Remove the interface connector board NOTE After assembly configure the interface connector board if necessary P N 55034501 PCB Assembly I F Connector TFIF or LQPN RSPL B 2 02 Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA
3. 25 Roller Lever 1 Open the printer access cover 2 Remove the ribbon cartridge 3 Remove the shift arm spring 3 2 23 4 4 Remove the two 7 mm bolts 1 and detach the roller lever 2 P N 53479001 Lever Roller Color RSPL B 2 05 5 Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 60 OKIDATA Service Guide ML395 395C oes CFSE Chapter 3 Maintenance amp Disassembly 3 2 26 Ribbon Guide 1 Remove the printhead 3 2 01 i 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 Lift the printhead from the printer As you lift the printhead the ribbon guide can be removed P N 50605701 Ribbon Guide Post Color B 2 05 P N 53056002 Guide Ribbon Color RSPL B 2 05 Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 61 OKID AT A Service Guide ML395 395C FP oes OP Se Chapter 3 Maintenance amp Disassembly 3 2 27 Bail Open Cam and Bail Open Gear 1 Remove the printer mechanism 3 2 08 3 2 Detach the E snap ring 1 3 Remove the bail open gear 2 4 Remove the bail open cam 3 5 R
4. Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 42 OKIDATA Service Guide ML395 395C EA Chapter 3 Maintenance 8 Disassembly 3 2 08 Printer Mechanism 1 Remove the control board 3 2 06 2 Detach connectors CN102 1 and CN103 2 from the interface connector board 3 Remove the three mounting screws 3 at the rear of the printer mechanism 4 4 Remove the three mounting screws and brackets 5 There are two on the left side of the printer mechanism and one on the right side CAUTION Do not grasp the ribbon cartridge bracket paper chute or the guide shaft of the sheet feeder assembly when lifting the printer during the next step These parts are easily bent 5 While holding the base tray lift the printer mechanism and remove it NOTE When assembling the printer do not allow cables to get caught under the control board 3 Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 43 OKID AT A Service Guide ML395 395C Bes Chapter 3 Maintenance amp Disassembly 3 2 09 Platen Assembly 1 Remove the upper cover assembly 3 2 04 7 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 drive belt 4 4 Remove the E ring washe
5. Cover Open Alarm Circuit When the front access cover is opened the COVOPEN N signal is sent to the Slave MPU from the cover interlock microswitch The Slave MPU relays the switch status to the Master MPU The Master MPU will halt printing at the completion of the current line and light the ALARM Lamp Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 22 00 Service Guide ML395 395C OKIDATA Chapter 2 Principles of Operation 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 When the printer detects an out of paper condition the PE N signal goes low the printing is stopped and the ALARM LAMP is turned ON Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 23 ru E Service Guide ML395 395C OKIDATA Chapter 2 Principles of Operation 2 1 10 Power Supply This switching power supply converts the AC input voltage to 5 vdc 8 vdc an
6. IBM X24 AGM Print Mode La NLQ Uilty HSD Typestyle Courier Roman Swiss Orator DLL Pitch 10 cpi 12 cpi 15 cpi 17 1 cpi 20 cpi Proportional General Control Graphics SS Print Registration 5 4 3 2 1 0 1 2 3 4 5 o Operator Panel Function Full Operation Ribbon Selection Appears Black Ribbon Film Ribbon for Color Ribbon Model 395C Black Yellow Magenta Cyan Violet Orange Green Ribbon Selection Appears Black Ribbon Film Ribbon for Black Ribbon Model 395 E CT Auto CR IBM emulation No Yes only Form Tear Off Off 300 mS 2sec 4 sec rine Spacing GLP SLP Page Length 12 11 11 2 3 14 17 3 3 5 4 5 5 6 de 8 8 5 Line Spacing 6 LPI 8 LPI Page Length 12 11 11 2 3 14 17 3 35 4 5 5 6 7 8 8 5 Tine Spacing 5 LPI 8 LP Page Length 12 11 11 2 3 14 17 3 3 5 4 5 5 6 8 8 5 Po Paper Transparency Paper Transparency Symbol Sets Set Set Il Epson Language Sei American French German British Danish Swedish Italian Spanish Japanese Norwegian Danish Il Spanish Il Latin American French Canadian Dutch Publisher TS Code Page USA Multilingual Canada French General Max Receive Buffer 1 Line 8K 23K Interface DO femme ui E a a orange saraaa peca Appears Serial Data 7 8 Bits 8 Bits 7 Bits ONLY when serial interface Protocol Ready Busy X ON X OFF is in use Busy Line SSD SSSD DTR RTS Baud Rate 19200 bps 9600 bps 4800 bps 2400 bps 1200 bps 600 bps 3
7. Remove the ribbon guide 3 2 02 3 Remove the ribbon protector 3 2 03 44 4 Install the printhead 5 Set the printhead gap lever to position 1 6 Set the paper release lever to the OPEN position 7 Loosen the left and right eccentric collar setscrews STEP A 8 Place the printhead at the left side of the platen 9 Rotate the left adjusting collar until you obtain a 015 002 gap between the printhead and the platen 10 Place the printhead at the right side of the platen 11 Rotate the right adjusting collar until you obtain a 015 002 gap between the printhead and the platen 12 When the correct gap has been attained tighten the left and right eccentric collar setscrews 13 Check the gap at the left side center and right side of the platen If the printhead gap is not within specification go to STEP A 14 Remove the printhead 15 Install the ribbon protector ribbon guide and printhead CAUTION Be sure to pull the printhead toward the stopper whenever it is installed Piaten Left Canter dni Printhead and Printhead pushing direction Printhead Platen Setscrew on leftand right sides Eccentric collar on lettand right sides Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 73 OKIDATA Service Guide ML395 395C F Chapt
8. drive mechanism moves the ribbon in synchronization with the space motor operation The ribbon drive mechanism consists of the following items 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 Ribbon Feed Operation The rotation of the space motor is transmitted to the drive gear in the ribbon cartridge through the ribbon feed gear assembly thereby feeding the ink ribbon The feed direction of the ribbon is maintained by switching the rotational direction of the gears in the ribbon drive assembly This ensures unidirectional ribbon movement when bidirectional printing is used wee e g Ribbon Cartridge A d ia oe 1 a E ro rr A he En o d r Sey Rd EP i oiee Ti A L k e Ea rl es pu R te a Ei wee pie a at tes ma LO pT a as re Sp are Peai a ae 1 ak l bat Lait 3 a A Gti aap aes e masi wee E A o dl a E a w va e fo ee E i ET A I if F ee A E a 1 a I Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 27 A Service Guide ML395 395C OKIDATA Chapter 2 Principles of Operation 2 2 04 Paper Feed Paper feeding is performed by turning the platen and the pin tractor which is driven by the l
9. material http bpx okidata com Page 45 OKID AT A Service Guide ML395 395C ESTES Chapter 3 Maintenance amp Disassembly 3 2 11 Head Cable Assembly 1 Detach the printhead 3 2 01 i 2 Remove the printer mechanism 3 2 09 A 3 Work from the bottom of the printer mechanism and loosen the two mounting screws 1 4 Detach tabs A and B from the frame and remove the cable holder 2 5 Remove the two ribbon cartridge bracket mounting screws 3 6 Detach the cartridge bracket 4 7 Remove the mounting screw 5 8 Detach the connector clamp 6 9 Detach the head cable connector 7 from the carriage frame 8 10 Lift the front of the printer mechanism and remove the head cable assembly by pulling downward P N N A Clamp B 2 04 3 0544 P N 56614201 Cable Printhead Assembly RSPL B 2 04 4 055 12 5 Head Gable and Plastic installed Go mecth Head Gable and Plastic installed Incore thr Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 46 OKIDATA Service Guide ML395 395C YE Chapter 3 Maintenance 8 Disassembly 3 2 12 Sensor Board 1 Remove the printer mechanism 3 2 09 4 2 Raise the front of the printer mechanism 3 Disconnect cables CN2 1 and CN3 2 from the sensor board 3 4 Remove the three sensor board mounting screws
10. moves with difficulty it is properly installed 3 Synchronize the tractors by aligning the synchronization marks in the same direction 4 Position the guide holes 13 in the tractor drive gears in the same direction 5 Position the groove of the upper center guide behind the paper pressure guide 14 6 The left tractor assembly must be positioned between the two locking tabs 15 P N 50054501 Tractor Push Left Assembly RSPL B 2 08 3 1143 P N 50054601 Tractor Push Right Assembly RSPL B 2 08 4 11 P N 51002301 Friction Piece RSPL B 2 083 11 35 P N 51002401 Guide Center Upper RSPL B 2 08 5 1155 P N 51002501 Guide Center Lower A RSPL B 2 08 3 114 P N 51002601 Guide Center Lower B RSPL B 2 08 112 P N 51214201 Gear Drive A RSPL B 2 08 4 112 P N 51214301 Gear Drive B RSPL B 2 08 4 11 Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 57 OKID AT A Service Guide ML395 395C Chapter 3 Maintenance amp Disassembly 3 2 23 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
11. red line as a guide 5 Press and hold PARK while pressing one of the two microfeed switches up or down arrow UP advances the paper The space used for the Top of Form increases DOWN retracts the paper The space used for the Top of Form decreases 6 Release PARK 7 Press SELECT and place the printer ON LINE SELECT will be lit Reset to Factory Defaults 1 Power OFF the printer 2 Press and hold LINE FEED and QUIET while powering ON the printer 3 The Top of Form is reset to factory defaults Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 83 OKID AT A Service Guide ML395 395C E Pr Chapter 3 Maintenance amp Disassembly 3 3 07 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 After a single sheet paper is printed pull the bail lever forward and the continuous feed paper will move back into the print position Paper park cannot be used when the optional pull tractor is installed Procedure 1 Tear off any printed pages 2 Make sure the printer is selected The SELECT lamp must be lit 3 Pres
12. unit 3 2 30 2 Remove the bottom push mechanism 3 2 34 Steps 2 3 4 5 3 Detach connector CN2 1 from the BTFD board 4 Remove the two mounting screws 2 5 Detach the line feed motor 3 P N 56509401 Motor Line Feed BTF Option RSPL B 2 15 Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 71 FA Service Guide ML395 395C OKIDATA Chapter 3 Maintenance amp Disassembly 3 2 37 Tractor Assembly 1 Remove the printer unit 3 2 30 2 Remove the bottom push mechanism 3 2 34 Steps 2 3 4 5 3 Remove the screw 1 the balancer 2 and the E clip 3 4 Remove the four mounting screws 4 and detach the side frame 5 5 Pull the tractor lock levers 6 in the direction of Arrow A 6 Slide the tractor assemblies 7 from the drive shaft 8 and the lock shaft 9 P N 50057402 Tractor Pin Left BTF Option RSPL B 2 15 P N 50057502 Tractor Pin Right BTF Option RSPL B 2 15 7 Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 72 OKIDATA Service Guide ML395 395C Chapter 3 Maintenance amp Disassembly 3 3 PRINTER ADJUSTMENTS 3 3 01 Printhead Gap 1 Remove the printhead 3 2 01 2
13. 00 bps DSR Signal Valid Invalid DTR Signal Ready on Power UP Ready on Select Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 80 OKID AT A Service Guide ML395 395C Chapter 3 Maintenance amp Disassembly Menu Reset CAUTION Okidata strongly recommends printing the menu BEFORE resetting to factory defaults ALL customized settings are lost when the menu is reset to factory defaults 1 Print the Menu When the menu is reset to factory defaults ALL customized settings WILL BE lost 2 Power OFF the printer 3 Press SELECT and PARK while powering ON the printer 4 The Menu is reset to Factory Defaults Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 81 OKID AT A Service Guide ML395 395C E Pr Chapter 3 Maintenance amp Disassembly Limited Operation General Information The Operator Panel Function Item in the Printer Menu can be set to enable FULL OPERATION or disable 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
14. 2 07 4 114 P N 56209901 Switch Micro RSPL B 2 07 4 11 Adj amp Release Lever The hamess E routed to the main logic board Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 56 OKID AT A Service Guide ML395 395C gt Chapter 3 Maintenance amp Disassembly 3 2 22 Push Tractor Assembly 1 Remove the lower center guide 1 2 Separate the claws 2 and remove the two drive gears 3 from the right side of the printer mechanism 3 Using a needle nose pliers remove the nylon cable clamp 4 4 Slide the upper drive shaft 5 to the left and remove it 5 Slide the lower drive shaft 6 to the left 6 Remove the upper center guide 7 being careful not to lose the friction ring 8 7 Remove the lower drive shaft 8 Loosen the two screws 9 one is located on each side of the printer mechanism 9 Lift and remove the push tractor assemblies 10 and locking shaft 11 NOTE To remove the tractors from the locking shaft raise the lock lever and slide the tractor off When installing the push tractor assembly take the following precautions 1 First install the friction ring in the upper center guide If the upper center guide moves easily re the locking shaft you must rotate the friction ring 45 degrees using a standard screwdriver 2 Check the installation if the guide
15. 3 2 29 Ribbon Shift Cam Lever Assembly 63 3 2 30 Printer Unit 64 3 2 31 BTFD Printed Circuit Board 65 3 2 02 Tension Spring 66 3 2 33 Sheet Guide 67 3 2 34 BTF Front Door Assembly 68 3 2 380 Drive Pulley and Mini pitch Belt 69 3 2 386 Line Feed Motor 70 3 2 0 Tractor Assembly 71 3 3 Printer Adjustments Printhead Gap 72 3 3 02 Line Feed Belt Tension 73 3 3 03 Color Adjustment Microline 395C Printer 74 3 0 04 Key Combinations 75 3 3 05 Menu Operation Menu Mode 76 eae Menu Print 11 oda Sample Menu 78 eee Menu Settings 79 aves Menu Reset 80 oe Limited Operation 81 3 3 06 Top of Form 82 Table of Contents Page 3 3 0 7 Paper Park 83 0 3 08 Forms Tear Off 84 3 4 Cleaning 85 3 5 Lubrication 86 ias Lubrication Points Monochrome and Color 87 ase Lubrication Points Monochrome and Color 88 Continued ss Lubrication Points Monochrome and Color 89 Continued one Lubrication Points Color 90 alas Lubrication Points Options 91 3 6 Shipping Instructions Return For Service 92 3 6 02 All Other Returns 93 4 Failure amp Repair Analysis 4 1 Overview 94 4 1 02 Printer Serial Number Identification 95 4 2 Reporting Problems General Information 96 4 2 02 Problem Lists 97 4 2 03 Reporting Methods 98 4 3 Troubleshooting Updates General Information 99 4 3 02 Okilink Il 100 4 3 03 Faxable Facts 101 4 3 04 Technical Service Bulletins 102 4 4 Trou
16. 4 5 Disconnect connector CN1 5 and detach the sensor board P N 55050501 PCB Sensor Board RSPL B 2 06 094 LQEW or LPRW P N 56619104 Cord Sensor PCB Connection RSPL B 2 06 5 09 3 125 Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 47 OKIDATA Service Guide ML395 395C Fa Chapter 3 Maintenance amp Disassembly 3 2 13 Ribbon Feed Assembly 1 Remove the printer mechanism 3 2 08 2 Remove the two ribbon cartridge bracket mounting screws 1 3 Detach the cartridge bracket 2 4 Remove the two mounting screws 3 5 Detach the ribbon feed assembly 4 NOTE When assembling install the ribbon drive assembly so that the gear teeth contact properly 5 The gears must not bind together P N 50054301 Feed Ribbon Assembly RSPL B 2 06 3 0955 Do not e move this c neu 3 Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 48 OKID AT IN Service Guide ML395 395C Ta Chapter 3 Maintenance amp Disassembly 3 2 14 Space Motor Assembly 1 Remove the printhead 3 2 01 i 2 Remove the ribbon feed assembly 3 2 13 5 3 Loosen the two belt pulley bracket mounting screws 1 4 While pushing the b
17. Board TFCB 137 re ML395 395C Jumper Plugs SP2 Jim 138 Fitzpatrick Project Leader Okidata 11 18 96 A 2 02 Power Supply Board POW 139 A 2 03 Interface Board TFIF 140 RE Change sp102 jumper Eric 141 Tomenga OKI ELECTRIC US on Shorting Plug SP102 Jim Fitzpatrick Project 142 Leader Okidata 11 18 96 A 2 04 Sensor Board LQEW 143 A 2 05 Operator Panel TFOP 144 B Illustrated Parts Listing B1 1 Overview General Information 145 B 1 02 Definition of Terms 146 B 1 03 Parts Ordering Information 147 B 2 Charts 148 B 2 01 Upper Cover Assembly 149 B 2 02 Printer Unit General Assembly 150 B 2 03 Operator Panel 151 B 2 04 Carriage Assembly Black and White 152 B 2 05 Carriage Assembly Color 153 B 2 06 Printer Unit Black and White 1 of 3 154 B 2 07 Printer Unit Black and White 2 of 3 155 B 2 08 Printer Unit Black and White 3 of 3 156 B 2 09 Printer Unit Color 1 of 3 157 B 2 10 Printer Unit Color 2 of 3 158 B 2 11 Printer Unit Color 3 of 3 159 B 2 12 Cables and Connectors 160 B 2 13 Options 161 Table of Contents Page B 2 14 Pull Tractor Assembly Option 162 B 2 15 Bottom Tractor Feed Unit Push BTF Option 163 B 2 16 BTF Pull Up Roller Assembly Option 164 B 2 17 Consumables 165 B 2 18 Packing Materials 166 B 2 19 Documentation 167 Page 2 OKIDATA Service Guide ML395 395C 3 Chapter O About Th
18. GROUP to move through the groups of the Menu A line prints showing the Group Press ITEM to move through the items in a group A line prinis showing the Item Press SET to change the setting for an item A line prints showing the Setting Press EXIT to exit Menu Mode The printer will go ON LINE SELECT will light Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 77 OKID AT A Service Guide ML395 395C Chapter 3 Maintenance amp Disassembly 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 Printer Control Emulation Mode Epson LQ 6 Press PRINT to print the current Menu 7 Press EXIT to exit Menu Mode 8 The printer will go ON LINE SELECT will light Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 78 Service Guide ML395 395C Chapter 3 Maintenance amp Disassembly OKIDATA Sample Menu Printer Cantrell Ermulatior Sade EPSOH LG Pant Print Node 10 Fant Trpestyla Courler Font PLEER 16 EPI Fant Style Karmal Fant DE Sing
19. IDATA Page 75 Service Guide ML395 395C Chapter 3 Maintenance amp Disassembly 3 3 04 Key Combinations Table Key Combination SELECT FORM FEED Hold during power ON SELECT PARK Hold during power ON QUIET LINE FEED Hold during power ON LINE FEED Hold during power ON QUIET Press with printer deselected OFF LINE PARK Hold during power ON Activates Hexadecimal Dump Mode Resets Printer Menu to factory defaults Resets Top of Form to factory default Activate Font Test To end Font Test press SELECT Activate Menu To exit press SELECT Activate Rolling ASCII Test To end Rolling ASCII Test press SELECT Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 76 OKIDATA Service Guide ML395 395C LO s Chapter 3 Maintenance amp Disassembly 3 3 05 Menu Operation Menu Mode 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 Printer Control Emulation Mode Epson LQ 6 Go to Step Ato print the current menu Go to Step B to change the menu Step A Press PRINT to print the current Menu Press EXIT to exit Menu Mode The printer will go ON LINE SELECT will light Step B Press
20. OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 21 FA Service Guide ML395 395C OKIDATA Chapter 2 Principles of Operation 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 The fault alarm circuit generates the ALM signal high which causes the power supply to turn all DC power OFF Printhead Overheat Alarm Circuit In order to protect the printhead coils this circuit monitors the printhead temperature by using a thermistor contained in the printhead The CPU senses this circuit every time a line is printed When printing the printhead temperature rises If the head temperature reaches approximately 115 degrees Celsius a head overheat condition ALARM 1 is generated When ALARM 1 is detected bi directional printing stops Uni directional printing continues If the printhead temperature continues to rise ALARM 2 is generated All printing stops Printing resumes when the head temperature falls below the ALARM 1 level
21. PL B 2 04 4 05 Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 38 OKID AT A Service Guide ML395 395C Chapter 3 Maintenance amp Disassembly 3 2 04 Upper Cover Assembly 1 Disconnect the interface cable 1 2 Detach the platen knob 2 3 Remove the two cover mounting screws 3 at the rear of the printer 4 Lift the rear access cover 4 to the open position 5 Lift the upper cover at the back and tilt it towards the front to remove it NOTE When installing the upper cover assembly Move the release lever 5 towards the front of the printer Move the bail arm lever 6 towards the back of the printer Check that the paper bail moves properly P N 50212441 Cover Middle Assembly RSPL B 2 01 P N 50212442 Cover Middle Assembly RSPL B 2 01 Color P N 50215701 Cover Access ML395 RSPL B 2 01 P N 50215703 Cover Access ML395C RSPL B 2 01 4 P N 50215801 Cover Rear Assembly RSPL B 2 01 P N 53478601 Platen Knob RSPL B 2 02 Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 39 OKID AT A Service Guide ML395 395C E Chapter 3 Maintenance amp Disassembly 3 2 05 Operator Panel Assembly 1 Remove the upper cover a
22. Page 1 Service Guide ML395 395C Chapter 0 About This Manual OKIDATA Service Manual ML395 ML395C Dot Matrix Printers Adobe Acrobat printable reference copy of the OKIDATA Service Training Manual 09 17 97 Note This Adobe Acrobat version of the Okidata Service Training Manual was built with the pictures rendered at 300 dpi which is ideal for printing but does not view on most displays well Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Table of Contents Page Service Guide ML395 395C O About This Manual Front Cover 1 Manual Copyright 2 1 Product Specifications 1 1 Overview General Information 3 1 2 Product Specifications 4 1 3 Paper Specifications 5 1 4 Physical Specifications 6 1 5 Power Requirements 7 1 6 Environmental Conditions 8 1 7 Agency Approvals 9 1 8 Options 10 1 9 Consumables 11 1 10 Memory Specifications 12 1 11 Printer Reliability 13 2 Principles of Operation 2 1Electrical Operation General Information 14 2 1 02 Microprocessors MPUs and Peripheral Circuits 15 2 1 03 Initialization 16 2 1 04 Interface Control 17 2 1 05 Printhead Drive Circuit 18 2 1 06 Spacing Drive Circuit 19 2 1 07 Line Feed Circuit 20 2 1 08 Alarm Circuits 21 2 1 09 Paper End Detection Circuit 22 2 1 10 Power Supply 23 2 2 Mec
23. Page 18 00 Service Guide ML395 395C OKIDATA Chapter 2 Principles of Operation 2 1 05 Printhead Drive Circuit This circuit is used to drive the 24 print wires The signals HD1 through HD24 control the individual print wires The HD ON signal even odd trigger enables the drive circuit when printing is desired The head drive duration is determined by an RC integrating circuit which modifies the HD ON pulse width The pulse width of the HD ON signal varies with the number of pins being driven Printhead Drive Time The drive time increases as more pins are driven The drive time decreases as less pins are driven The drive time also increases if the head gap lever is placed in positions 4 through 9 An RC circuit also is used to compensate for the fluctuation of drive voltage 38 vdc 2 1 04B pcx Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 19 F o Service Guide ML395 395C OKIDATA Chapter 2 Principles of Operation 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 The SPMO FOW or SPMO REV signal from the Head Co
24. TF Front Door Assembly 1 Remove the printer unit 3 2 30 i 2 Detach connector CN1 1 from the BTFD board 2 3 Remove the tension spring 3 2 32 5 4 Remove the four mounting screws 3 5 Remove the bottom push mechanism 4 6 Detach the door assembly 5 P N 53063701 Door Front Assembly BTF Option RSPL B 2 15 77 Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 69 OKID T Service Guide ML395 395C A A Chapter 3 Maintenance amp Disassembly 3 2 35 Drive Pulley and Mini pitch Belt 1 Remove the printer unit 3 2 30 i 2 Remove the bottom push mechanism 3 2 34 Steps 2 3 4 5 3 Detach the lock flange 1 of the drive pulley 2 4 Remove the mini pitch belt 3 5 Remove the drive pulley NOTE If you are only removing the mini pitch belt it is not necessary to remove the drive pulley P N 51228801 Pulley Drive BTF ML395 Option RSPL B 2 15 P N 54111291 Belt Mini Pitch 125 teeth Option RSPL B 2 15 3 Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 70 OKID AT A Service Guide ML395 395C E Chapter 3 Maintenance amp Disassembly 3 2 36 Line Feed Motor 1 Remove the printer
25. a paper end condition Bottom Feed Paper End Used with optional Pull Tractor When the release lever is in the TRACTOR FEED position the switch on the left push tractor and the paper end sensor on the sensor board are active If paper is detected by either of these sensors paper end is inhibited When bottom feed paper is installed it moves the bottom paper end lever to turn the sensor ON When a paper out condition exists the lever blocks the sensor indicating a paper end condition Rear Feed Paper End When the release lever is in the TRACTOR FEED position the switch on the left push tractor and the paper end sensor on the sensor board are active If paper is detected by either of these sensors paper end is inhibited When rear feed paper is installed pressure is placed on the microswitch located in the left push tractor Since the switch is turned ON paper is detected Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 29 ra de Service Guide ML395 395C OKIDATA Chapter 2 Principles of Operation 2 2 06 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 Insert the pape
26. become detached from the two guides A in the lower cover NOTE Be careful not to damage the cables with the power supply unit mounting bracket located at the left rear of the power supply unit P N 56411201 Power Supply Assembly 120V RSPL B 2 02 P N 56506302 Power Supply Assembly Option RSPL B 2 02 4 134A 220 240V P N 56614101 Cord Power Connection 9 pin RSPL B 2 02 5 125 P N 56614801 Cord Power Connection 13 pin RSPL B 2 02 4 12 Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 58 OKID ATA Service Guide ML395 395C Perr Chapter 3 Maintenance amp Disassembly 3 2 24 Ribbon Shift Arm Spring Ribbon Shift Arm Microline 395C Color Model Only 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 50315401 Screw Color RSPL B 2 05 P N 50924001 Spring Shift Arm Color RSPL B 2 05 P N 53478901 Arm Ribbon Shift Color RSPL B 2 05 Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 59 OKID ATA Service Guide ML395 395C ar Chapter 3 Maintenance Disassembly 3 2
27. bleshooting Tips Preliminary Checks 103 4 4 02 Problem Categories 104 4 4 03 START HERE Flowchart 105 4 4 04 Tips for Preventing Image Problems 106 4 4 05 Common Problems 107 4 5 Abnormal Output 108 4 6 Fault Alarms General Information 109 4 7 Repair Analysis Procedures RAPS Using The RAPS 110 4 7 02 RAP Index 111 cit RAP 01 Power Lamp Does Not Light 112 pio RAP 02 Space Error ALARM 5B 113 oe RAP 03 Head Homing Error ALARM 53 114 ia RAP 04 Ribbon Homing Error ALARM 57 115 eves RAP 05 Bail Home Error ALARM 5C 116 a RAP 06 Wrong Character Character Omission or Dot 117 Omission es RAP 07 Ribbon Feed Trouble 118 nicas RAP 08 Line Feed Trouble 119 ae RAP 09 Malfunction of Operator Panel Switch 120 eae RAP 10A Data Receive Failure 121 eer RAP 10B Parallel Interface Problem 122 Table of Contents Page ee RAP 10C Serial Interface Problem 123 a RAP 10D Data Receive Failure Alarm Light Lit 124 eee RAP 11 Color Ribbon Shift Problem 125 4 8 Printer Tests 126 4 8 02 Font Test 127 4 8 03 Serial Interface Loopback Test 128 4 8 04 Hexadecimal Dump 129 4 9 Resistance Checks General Information 130 4 9 02 Printhead Resistance Check 131 4 9 03 Line Feed Motor Resistance Check 132 4 9 04 Space Motor Resistance Check 133 4 9 05 Ribbon Motor Resistance Check 134 A Board Diagrams A 1 Overview General Information 135 A 2 Index To Charts 136 A 2 01 Main Controller
28. ce Disassembly 3 2 16 Cooling Fan 1 Remove the printer mechanism 3 2 08 7 2 Remove the two ribbon cartridge bracket mounting screws 1 3 Detach the cartridge bracket 2 4 Using needle nosed pliers detach the nylon cable clamp 3 from the fan cover 4 5 Remove the two fan cover mounting screws 5 6 Remove the cooling fan fan cover assembly 7 Remove the two cooling fan mounting screws 6 8 Detach the cooling fan 7 P N 56509501 Fan Cooling RSPL B 2 06 095 Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 51 OKIDATA Service Guide ML395 395C 3 a a Chapter 3 Maintenance amp Disassembly 3 2 17 Bail Ribbon Motor Assembly 1 Remove the printer mechanism 3 2 09 4A 2 Disconnect connector CN2 1 3 Remove the two mounting screws 2 4 Detach the bail ribbon motor assembly 3 NOTE When assembling install the bail ribbon motor assembly so that the gear teeth contact properly he gears must not bind together P N 56506301 Motor Step Bail Arm Assembly RSPL B 2 06 0943 Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 52 OKID AT A Service Guide ML395 395C EF Chapter 3 Maintenanc
29. d 38 vdc for use throughout the printer 38 V primary Rectification and 38 V Noise filler i switching circuit smoolhing circuil circuit Switching contro circuit Alarm control E POW ALM circuil ALM 5 Vand 8 V primary switching Rectification and sy regulaling circuit circuit Reclilicalion and E VY smoothing circuil POW ALM Output from the Power Supply in the event of an abnormal temperature rise in the power supply unit or an overcurrent condition of the 38 vdc The Main Control Board suppresses this condition by temporarily suspending printing If the condition does not change the Main Control Board will enable the FAN ALARM Alarm 60 See Section 4 ALM Output from the Main Control Board upon detection of an overdrive condition in the printhead LF motor or bail ribbon motor drive circuits Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 24 A Service Guide ML395 395C OKIDATA Chapter 2 Principles of Operation 2 2 MECHANICAL OPERATION 2 2 01 The Printhead Mechanism The Microline 395 uses a highly efficient stored energy type printhead Power is not consumed until the printwires are activated thereby extending the printhead life to approximately 200 million characters The printhead uses 24 printwires
30. d See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 8 08 Service Guide ML395 395C OKIDATA Chapter 1 Product Specifications 1 6 ENVIRONMENTAL CONDITIONS 1 6 01 Ambient Temperature and Relative Humidity While in operation 41 F to 104 F 20 80 Relative Humidity While in storage 14 F to 122 O 5 95 Relative Humidity 1 6 02 Printer Noise Level 10 cpi LQ Mode Standard noise level 58 dba Quite mode noise level 56 dba Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 9 OKIDATA Service Guide ML395 395C 0 Chapter 1 Product Specifications 1 7 AGENCY APPROVALS North America FCC Class B UL 1950 D3 CSA 950 D3 Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 10 OKID AT A Service Guide ML395 395C Chapter 1 Product Specifications 1 8 OPTIONS 1 8 01 Cut Sheet Feeders CSF 3001 Single bin Cut Sheet Feeder CSF 3002 Dual bin Cut Sheet Feeder 1 8 02 Pull Tractor Assembly The Pull Tractor Assembly is required for bottom feeding if the optional Bottom Push Tractor Unit is not installed 1 8 03 Bottom Push Tractor Unit Card Stock and Lab
31. driver Needle Nose Pliers 4 inch Diagonal Cutters Tension Gauge capable of measuring 1 pound of pressure 7 mm open ended wrench Ruler capable of measuring 1 16 inch increments 3 32 inch socket with driver Feeler Gauge Digital Multimeter Shop Vacuum Cloth soft and lint free All Purpose Cleaner Dow Corning Molycoat BR 2 or Molycoat ME 300L or equivalent Contact Kleen Okidata P N 51802301 Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 33 OKIDATA Service Guide ML395 395C Chapter 3 Maintenance amp Disassembly 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 3 Detach the interface cable if installed 4 Do not remove parts unnecessarily Try to keep disassembly to a minimum 5 Use the recommended maintenance tools 6 When disassembling follow the listed sequence Failure to follow the correct sequence may result in damaged parts 7 Since screws collars and other small parts are easily lost they should be temporarily attached to the original positions 8 When handling circuit boards use extreme care Integrated circuits microprocessors ROM and RAM can be destroyed by static electricity 9 Do not place pri
32. dures while servicing the unit Be sure to read all notes cautions and warnings as they contain important information regarding disassembly assembly Microline 395C Plus Only Color Version 3 2 24 Ribbon Shift Arm and Shift Arm Spring 3 2 25 Roller Leveri 3 2 26 Ribbon Guide 3 2 27 Bail Open Cam and Bail Open Geari 3 2 28 Ribbon Shift Cam and Ribbon Shift Gear 3 2 29 Ribbon Shift Cam Lever Assembly Optional Bottom Push Tractor Unit BPTU 3 2 30 Printer Unit 3 2 31 BTFD PCB 3 2 32 Tension Spring ii 3 2 33 Sheet Guide 3 2 34 Bottom Cover 3 2 35 Drive Pulley and Mini Pitch Belt 3 2 36 Line Feed Motor 4 3 2 37 Tractor Assembly 4 NOTE Refer to Appendix B Illustrated Parts Listing for the location of the printers major assemblies Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 35 OKID AT A Service Guide ML395 395C Bes Chapter 3 Maintenance amp Disassembly 3 2 01 Preliminary Items Printhead WARNING The printhead will be HOT immediately after printing 1 Open the printer access cover 2 Remove the ribbon cartridge 1 3 Place the head gap adjusting lever 2 to the range 9 position 4 Remove the two mounting screws 3 5 Lift the printhead 4 from the connector to remove it NOTE When installing the printhead pull the printhead toward
33. e amp Disassembly 3 2 18 Paper Bail Assembly 1 Remove the printer mechanism 3 2 08 lt 2 Remove the bail ribbon motor assembly 3 2 17 5 3 Detach the bail arm springs 1 NOTE The left bail arm spring is longer than the right bail arm spring Be sure to install each spring on the proper side 4 Remove the bail arm idle gear 2 5 Detach the E snap ring and remove the bail open cam 3 6 Detach the E snap ring 4 and remove the left bail arm 5 from the indicator shaft assembly 6 by pulling to the left 7 Remove the right bail arm 7 by pulling to the right while expanding the clamps 8 8 Detach the right bail arm from the indicator shaft assembly P N 50054401 Indicator Bar Assembly RSPL B 2 06 5 10 P N 50910701 Spring Bail Arm Left RSPL B 2 06 7 10 P N 50910801 Spring Bail Arm Right RSPL B 2 06 4 10 P N 51210201 Gear Idler Bail Arm RSPL B 2 06 1 1045 P N 53478501 Bail Arm Left RSPL B 2 06 3 10 P N 53478502 Bail Arm Right RSPL B 2 06 4 10 5 Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 53 OKIDATA Service Guide ML395 395C Chapter 3 Maintenance amp Disassembly 3 2 19 Carriage and Carriage Shaft 1 Loosen the screw 1 and slide it towards the back of the printer 2 Loosen the mounting screw 2 and de
34. els NOTE A Pull Tractor Assembly or Bottom Push Tractor must be used to feed labels Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 11 r 08 Service Guide ML395 395C OKIDATA Chapter 1 Product Specifications 1 9 CONSUMABLES 1 9 01 Black Ribbon Cartridge Microline 395 and Microline 395C Type Nylon Fabric Ribbon Ribbon Life 5 million characters 1 9 02 Color Ribbon Cartridge Microline 395C Type Four band color ribbon Yellow Magenta Cyan Black Ribbon Life Black 2 1 million characters Cyan 1 9 million characters Magenta 1 9 million characters Yellow 1 3 million characters 1 9 03 Film Ribbon Can be used in both the Microline 395 and Microline 395C Ribbon Life 400K Characters at 10 cpi in LA mode Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 12 de Service Guide ML395 395C OKIDATA Chapter 1 Product Specifications 1 10 MEMORY SPECIFICATIONS 1 10 01 ROM Resident Program ROM 128 Kbytes Resident Fonts 384 Kbytes 1 10 02 RAM Total RAM 64 Kbytes Print Buffer 23 Kbytes I F Buffer 8 K bytes DLL Buffer 22 Kbytes Command Buffer 11 Kbytes 1 10 03 EEPROM Internal Control Menu 256 bits
35. elt pulley bracket 2 to the left temporarily tighten the two screws This will ease the tension on the space belt 5 Remove the three space motor mounting screws 3 6 Using needle nosed pliers detach the nylon cable clamp 4 from the cooling fan 7 Remove the space motor 5 by pulling it toward the front of the printer P N 56506205 Motor Space ML395 RSPL B 2 06 43 09 i o a Adjusiment when wA assembling Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 49 ru FA Service Guide ML395 395C OKIDATA Chapter 3 Maintenance amp Disassembly 3 2 15 Space Belt 1 Remove the printhead 3 2 01 2 Remove the head cable assembly 3 2 11 3 Remove the space motor assembly 3 2 14 4 Remove the mounting screw 1 5 Detach the belt clamp 2 6 Remove the belt pulley 3 from the bracket 4 and detach the space belt 5 NOTE When installing the belt clamp Place the ribbed side of the belt clamp facing up as shown P N 50702301 Belt Clamp B 2 04 05 P N 51303101 Belt Mini Pitch Space RSPL B 2 04 05 Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 50 OKID AT A Service Guide ML395 395C Chapter 3 Maintenan
36. emove the plastic ring 4 Caution Installation When installing make sure that the plastic ring is positioned against the rim on the bail open cam Installation may be easier if the bail open cam is installed on the shaft first followed by the bail open gear Press down on the spring 5 slightly when installing the cam and ring The plastic ring MUST rest against the spring P N 50911001 Brake Spring B Color B 2 11 3 P N 51214601 Gear Bail Open Color RSPL B 2 11 57 P N 51222601 Cam Bail Open Color RSPL B 2 11 5 Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 62 OKID AT A Service Guide ML395 395C Chapter 3 Maintenance amp Disassembly 3 2 28 Ribbon Shift Cam and Ribbon Shift Gear 1 Remove the printer mechanism 3 2 08 4 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 Assembly Hold back the spring 4 while pushing the gear and cam on the shaft Place the roller 5 in the groove 6 of the ribbon shift cam Perform the Microline 395C color adjustment 3 3 03 P N 50910901 Brake Spring A B 2 11 4 P N 51215101 Gear Ribbon Shift Color RSPL B 2 11 5 P N 51222501 Cam Ribbon Shift Color RSPL B 2 11 5 Copyright 1997 Okidata Division of OKI America Inc Al
37. er 3 Maintenance amp Disassembly 3 3 02 Line Feed Belt Tension NOTE Rotate the platen pulley at least once before making the adjustment 1 Loosen the three line feed motor mounting bolts 1 2 Using a tension gauge apply 5 pound of pressure at point A 3 Adjust the line feed motor 2 position to obtain a 1 16 inch deflection at point B 4 Tighten the three mounting bolts Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 74 OKID ATA Service Guide ML395 395C F Chapter 3 Maintenance amp Disassembly 3 3 03 Color Adjustment Microline 395C Printer Ribbon Home Adjustment 1 Detach the upper cover assembly 3 2 04 i 2 Remove the printer mechanism 3 2 08 4 3 Rotate the ribbon shift cam 1 so the ribbon guide 2 is at the top of the post 3 4 The gap from the end face of the ribbon sensor 4 to the shift cam lever 5 must be 020 5 If adjustment is necessary loosen the shift cam lever mounting screw 6 and position the lever to obtain the desired clearance 6 Check that the ribbon guide remained at the top of the post If it moved repeat the procedure Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com OK
38. f Operation 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 LSls When RST P is generated ROM program execution starts with the mode setting of Q8 Q9 Q12 and Q13 Next ROM and RAM are checked for errors RAM is initialized and the carriage bail and ribbon color model only are homed The program finally establishes the interface signals output level of ACK BUSY etc then turns the SELECT lamp ON to inform the host computer that the printer is ready to receive data Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 17 ru FA Service Guide ML395 395C OKIDATA Chapter 2 Principles of Operation 2 1 04 Interface Control The Microline 395 is capable of serial or parallel operation The desired interface method is selected by sliding the interface cover to expose the desired connector When this is done the interface select switch is turned ON or OFF to inform the Interface Control LSI Q12 of the selected interface Parallel Interface When the interface select switch is turned OFF the parallel interface is selected and the Interface Control LSI is in the parallel mode The data from t
39. feed 1 2 02 Paper Path Bottom Feed Rear Feed Top Feed 1 2 03 Printhead Type Staggered 24 pin stored energy printhead 1 2 04 Interface Methods Both are Standard Centronics Parallel Interface RS232 C Serial Interface 1 2 05 Print Speed ee aa Setting Draft Quality fOcpi M2 ig __ ___ 408cps_ 202 cps _ 188cps_ i2cpi h2 607cps 4860ps 242cps t620ps iS epi lores foses 202 eps 171cpi 12 847cps B cps zei 2 df Moos cps doepi 8S ps 7S cps ti7cops d2epi 3 RR cps tt cps 140 cps Bea fios se se 17 1 cpi 2B cps 800 cps 200 cps o 20cpi PB 852 pss cpi Characters Per Inch 234 cps cps Characters Per Second 1 2 06 Symbol Sets Standard ASCII Epson Character Set IBM Character Set and Set II IBM Proprinter All Character Set International Characters Line Graphics Code Page 850 863 437 1 2 07 Standard Fonts Utility Used in Utility and High Speed Draft Modes Courier Swiss Roman Orator 1 2 08 Line Feed Increments 1 6 n 180 1 8 n 216 n 60 n 360 n 72 1 2 09 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 2 10 Paper Out Detection Printhead distance from edge of paper when End of Paper is detected Rear Feed 5 8 Bottom Feed 2 4 Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for a
40. hanical Operation 24 2 2 02 Spacing 25 2 2 03 Ribbon Drive 26 2 2 04 Paper Feed 27 2 2 05 Paper End Detection 28 2 2 06 Automatic Paper Loading 29 2 2 07 Paper Park 30 3 Maintenance amp Disassembly 3 1Maintenance General Information 31 3 1 02 Maintenance Items 32 3 1 03 Maintenance Precautions 33 3 2 Disassembly Assembly Procedures General Information 34 3 2 01 Preliminary Items Printhead 35 3 2 02 Ribbon Guide 36 3 2 03 Ribbon Protector 37 3 2 04 Upper Cover Assembly 38 Table of Contents Page 3 2 05 Operator Panel Assembly 39 3 2 06 Control Board TFCB 40 3 2 07 Interface Connector Board TFIF or LQPN 41 3 2 08 Printer Mechanism 42 3 2 09 Platen Assembly 43 3 2 10 Line Feed Motor 44 3 2 11 Head Cable Assembly 45 3 2 12 Sensor Board 46 3 2 13 Ribbon Feed Assembly 47 3 2 14 Space Motor Assembly 48 3 2 15 Space Belt 49 3 2 16 Cooling Fan 50 3 2 1 7 Bail Ribbon Motor Assembly 51 3 2 18 Paper Bail Assembly 52 3 2 19 Carriage and Carriage Shaft 53 3 2 20 Paper Pressure Guide 54 3 2 21 Printhead Gap Release Lever Microswitches 99 3 2 22 Push Tractor Assembly 56 3 2 23 Power Supply Unit 57 3 2 24 Ribbon Shift Arm Spring Ribbon Shift Arm 58 0 2 25 Roller Lever 59 3 2 26 Ribbon Guide 60 3 2 2 Bail Open Cam and Bail Open Gear 61 3 2 28 Ribbon Shift Cam and Ribbon Shift Gear 62
41. he interface is received through connector CN 1 and the Interface LSI Q12 latches this data to the internal register in the LSI at the rising edge of the STB N signal The BUSY signal is turned ON as the data is processed When processing is completed the BUSY signal is turned OFF and an ACK signal is sent to the host to request more data The BUSY signal is also turned ON when the printer is not able to receive data buffer is full printer is deselected or an error condition exists Mader Hpi parava E ADAS FLHFT BEM SELECTA cel ERAM ALTO FEEDNT M MITO PEEDOTAA SULECTIA di eta SECT Garalperatel feel istih 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 Q4 and input to the Master MPU Slave MPU and MMU The Master MPU converts the serial data to parallel data The interface signals DTR RTS SSD and TD output from the Master MPU and Interface LSI are converted from TTL levels to RS232 C levels by the line driver Q2 and sent to the serial interface connector cae ne m Geral Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com
42. ime 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 The following describes the function of the LSI Printhead Drive Control Printhead Drive Correction Modifies the drive time under the following circumstances Correction for edge pin driving Correction for drive voltage fluctuations Correction for head gap setting Interface LSI Q12 MSM60306 The MSM60306 is an external interface LSI and controls the following functions Interface Control Controls both the parallel and serial interface functions Pin 4 of this LSI enables selection of the serial or parallel interface Address Latch for lower 8 bits of the master MPU MMU Memory Management Unit LSI Q13 LC92018B 728 This LSI is connected between the Master and Slave MPUs and performs these functions Master Slave MPU Interface Transfers commands and data between the Master and Slave MPUs Memory Control Extends the addressable memory by switching banks in out Dynamic RAM Refresh Block Diagram of Microline 395 7 Han Ging 185 Gems Opes HS fo D Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http opx okidata com Page 16 F o Service Guide ML395 395C OKIDATA Chapter 2 Principles o
43. ine feed pulse motor The paper feed mechanism consists of the following items Pulse Motor with gears Idler Gear Change Spring Change Gear Platen Tractor Feed Unit Paper Pressure Guide Friction Feed When the release lever is set to the SHEET FEED position the change gear is disengaged from the tractor gear At the same time the release lever applies pressure to push the pressure rollers against the platen allowing paper to be fed y a Paper ga Pressure f ele Guide Feed Motor Platen Tractor Feed When the release lever is set to the TRACTOR FEED position the release lever allows the reset spring to push the change gear toward the tractor gear At the same time the release lever pushes the pressure rollers away from the platen allowing paper to be fed by the tractors Tractor Feed nit Idler Gear Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 28 FA Service Guide ML395 395C OKIDATA Chapter 2 Principles of Operation 2 2 05 Paper End Detection Cut Sheet Paper End 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 turned on When the printer is out of sheet paper the sensor is turned off indicating
44. is Manual This document may not be reproduced without the written permission of the Okidata Technical Training Group 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 O 1994 by Okidata All rights reserved First Edition May 1993 P N 59260501 Second Edition October 1994 P N 59260502 Written and produced by the Okidata Technical Training Group Please send any comments on this publication to the address listed below Technical Training Group Okidata 532 Fellowship Road Mount Laurel NJ 08054 3499 Okilink Login Name Technical Training OKI is a registered trademark of Oki Electric Industry Company Ltd marques deposee de Oki Electric Industry Company Ltd marca registrada Oki Electric Industry Company Ltd OKIDATA is a registered trademark of Oki Electric Industry Company Ltd marques deposee de Oki Electric Industry Company Ltd marca registrada Oki Electric Industry Company Ltd MICROLINE is a registered trademark of Oki Electric Industry Company Ltd marque depose de Oki Electric Industry Company Ltd Centronics is a registered trademark of the Centronics Data Computer Corp Epson is a registered trademark of Seiko Epson Corporation IBM is a registered trademark of International Business Machine Corporation Microsoft is a registered trademark of Microsoft Corporation MS DOS is a registered t
45. l rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 63 OKIDATA Service Guide ML395 395C Chapter 3 Maintenance amp Disassembly 3 2 29 Ribbon Shift Cam Lever Assembly 1 Remove the printer mechanism 3 2 08 3 2 Remove the ribbon shift cam and ribbon shift gear 3 2 27 3 3 Remove the mounting screw 1 4 Detach the ribbon shift cam lever 2 from the cartridge bracket 3 NOTE After assembly perform the Microline 395C color adjustment 3 3 03 43 P N 50054701 Lever Shift Cam Color RSPL B 2 11 5 Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 64 ru FA Service Guide ML395 395C OKIDATA Chapter 3 Maintenance amp Disassembly 3 2 30 Printer Unit Bottom Push Tractor Unit Optional 1 Turn the power switch OFF and remove the AC power cord from the outlet 2 Remove the DIN connector 1 3 Lift the printer unit 2 from the bottom push tractor unit 3 Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 65 OKIDATA Service Guide ML395 395C E Chapter 3 Maintenance amp Disassembly 3 2 31 BTFD Printed Circuit Boa
46. le Fant nep th ng Ho Bar r l Control Ersphica Uni diractLonsl Gararal Control Peper Cul Tuerrida No General Control Print Asgistration B teraral Conmeral Operator Panel Funtitles Full Gperstlor General Contra Ribbon Sed pe Tier Black ALbsem ara Control Benet Cakibit Mo General Central Page Kieth 14 6 Camera Control duto LF Ha Gereral Control Augen CA IBA N Gara aL Control Farm Taar 0TF ofr herer l Control Renu Line Ams Feed Line Spas ing E LPI ear Feed Skip Over Perforation H Ager Faad Page Lamgth Clmehia 11 Darton Fer Ling Spending E LFI Bstten Feed Skip Over Perforatilar le Beco Fined Page Length batches 11 Cut Senet Lira Spacirg amp LPI DJE Boek Page Length 11 Cut Sheer Paper Tranapar ncy Paper Emibol Sete Charaeter Set Set I Symbol Sete Code Page 5A Symbol fete carquaga Gare aver loan Syrbol Sete fern Character 51 aa Pas General Intertac Fax Becelwe Butter BE Eaneral Interface Print Sug rido Effective ras General Interface Ate Peed ET E 50M1 Walle Geres IntorTace EAJ Eonprmia por 5 tarndar Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 79 Ww Service Guide ML395 395C OKIDATA Chapter 3 Maintenance amp Disassembly Menu Settings Factory default settings are printed in Bold Italic Printer Control Emulation Mode Epson LQ IBM PPR
47. ness Partner Exchange BPX for any updates to this material http bpx okidata com Page 15 A Service Guide ML395 395C OKIDATA Chapter 2 Principles of Operation 2 1 02 Microprocessors MPUs and Peripheral Circuits Microprocessors Q16 80C154HGS and Q11 80C154VGS The Microprocessors are the nucleus of the control circuit The peripheral circuits operate under program control by these microprocessors The Master MPU Q16 controls the interface code processing and the Slave MPU The Slave MPU Q11 controls the spacing and printing functions Program ROM for Master MPU Q6 27C101 This Program ROM contains the control program for the printer The master microprocessor operates by execution of this program Program ROM for Slave MPU Q17 2764 This Program ROM contains the control program for the printer The slave microprocessor operates by execution of this program DRAM Q18 and Q19 The Dynamic RAM chips each consisting of 64x4 Kbits are used as the Receive Buffer and Print Buffer The total buffer size is 64x8 Kbits CGROM Q7 This is a 1 Mbit ROM which stores the resident character fonts EEPROM Q20 This 256 bit serial Electrically Erasable and Programmable ROM stores the menu data Motor Control LSI Q9 MSM6990 This LSI controls the following functions Space Motor Speed Control To obtain the carriage speed instructed by the Microprocessor the LSI generates the pulse switch timing and overdrive t
48. nted circuit boards directly on conductive surfaces 10 Follow the recommended procedures when replacing assemblies and units Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 34 OKID AT A Service Guide ML395 395C Chapter 3 Maintenance amp Disassembly 3 2 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 ltems included in the Recommended Spare Parts List are indicated by the acronym RSPL N A will appear where a part number is not available Part Item Comment Appendix B Number Description Reference This Service Handbook lists the disassembly procedures for major components of the unit Okidata DOES NOT recommend disassembling a unit which is operating normally If you decide to perform disassembly during this training Okidata recommends that you perform only the disassembly procedures for RSPL items All other procedures are provided to assist you in identifying parts It is not likely that you will perform these proce
49. ntrol LSI Q8 changes the current direction in the DC motor to run the motor in either the forward or reverse direction As the space motor rotates it generates feedback pulse signals SPfA and SPfB The Motor Control LSI detects the edge pulses from these signals and divides the frequency to output the MO LSI IPT signal for use in Dot Timing SPMO FOW ey ee POW ee eee q semo oa INU UUU T TT UUU Malor sf cs Current SPDV LH E ee ee SPA es TJ LT LS L 1 360 Edge pulse LL LL JIi t tf tt I1 Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 20 E Service Guide ML395 395C OKIDATA Chapter 2 Principles of Operation 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 The signals LFf1 through LFf4 establish the proper phase relationship for driving the motor ra OU RR OL Feo CM LU Pos Co Lo To A coe Ges lo Ed TO Le GOL o LS LLL RELE LFCHOP STOP gt lt FORWARD gt REVERSE gt Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the
50. ny updates to this material http bpx okidata com OKIDATA 1 3 PAPER SPECIFICATIONS 1 3 01 Types Letter Legal Labels Bottom feed only Continuous Forms Envelopes Card Stock Transparency 1 3 02 Weight 12 24 lb Continuous Form Paper 16 24 lbs Cut Sheet Paper 1 3 03 Number of Copies 1 4 4 Part Form Maximum 1 3 04 Maximum Thickness 014 inches Rear Feed 020 inches Bottom Feed Service Guide ML395 395C Chapter 1 Product Specifications Page 5 Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 6 de Service Guide ML395 395C OKIDATA Chapter 1 Product Specifications 1 4 PHYSICAL SPECIFICATIONS 1 4 01 Printer Dimensions Width 16 42 Height 7 09 Length 22 44 1 4 02 Printer Weight 37 lbs Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 7 de Service Guide ML395 395C OKIDATA Chapter 1 Product Specifications 1 5 POWER REQUIREMENTS 1 5 01 Input Power Input Voltage 120 VAC 10 15 220 240 10 15 Frequency 50 60 hz 2 1 5 02 Power Consumption During Self Test 180 VA During Standby 60 VA Copyright 1997 Okidata Division of OKI America Inc All rights reserve
51. pyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 31 OKID AT A Service Guide ML395 395C gt Chapter 3 Maintenance amp Disassembly 3 1 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 Follow the procedures listed in Adjustments and Service Settings Adjustments may be required when either consumables or parts are replaced Failure to perform these procedures could result in unnecessary service calls Cleaning procedures must be performed correctly if high print quality is to be achieved Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 32 F E Service Guide ML395 395C OKIDATA Chapter 3 Maintenance 8 Disassembly 3 1 02 Maintenance Items The following items are required to service the unit 1 Phillips Screwdriver with magnetic tip 2 Phillips Screwdriver with magnetic tip 3 Phillips Screwdriver with magnetic tip Straight slot Screw
52. r spring and idle gear 5 5 Remove the screw and detach the gear pulley washer and bushing 6 6 Remove the screw and detach the gear and bushing 7 7 Push in the platen lever 8 lift the bail and remove the platen assembly NOTE Perform the line feed belt tension adjustment 3 3 02 after replacing the line feed drive belt P N 50215902 Separator Sheet RSPL B 2 02 P N 50054101 Platen Assembly RSPL B 2 06 5 09 P N 51214501 Gear Platen A RSPL B 2 06 09 P N 51215001 Pulley Platen RSPL B 2 06 09 P N 51302790 Belt Mini Pitch Line Feed RSPL B 2 06 09 i AA A Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com a Y E Service Guide ML395 395C OKIDATA Chapter 3 Maintenance amp Disassembly Page 44 3 2 10 Line Feed Motor 1 Remove the printer mechanism 3 2 09 2 Remove the three mounting bolts and washers 1 3 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 P N 56510601 Motor Line Feed ML395 RSPL B 2 06 09 Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this
53. r fed in from the rear on the built in push tractor lt CANNOT be used with the optional pull tractor NOTES Some programs such as high resolution graphics packages pause occasionally while sending data to the printer If the pause lasts more than the selected interval the paper will advance to the tear off position until more data Is received No data is lost but the extra paper movement causes uneven print registration If this problem occurs disable set to OFF the Menu Setting for Forms Tear Off 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 Press QUIET to enter Menu Mode 7 The line shown below will print Printer Control Emulation Mode lt current setting gt 8 Press GROUP until the following line is printed General Control Graphics lt current setting gt 9 Press ITEM until the following line is printed General Control Forms Tear Off lt current setting gt 10 Press SET to change the menu setting for Forms Tear Off To activate Forms Tear Off the setting must be 300 mS 2 sec or 4 sec To deactivate Forms Tear Off the setting must be OFF 11 Press EXIT to exit Menu Mode 12 The printer will go ON LINE SELECT will light Application of the Forms Tear Off Feature Point of Sale 1 Set menu
54. r from behind the platen 3 Press the FORM FEED switch 4 The Paper Bail will automatically open 5 The Line Feed operation will load the paper 6 The Paper Bail will automatically close NOTE If the paper does not move the Auto Load motion becomes invalid and is treated like an ordinary paper end Continuous Sheet Rear Feed SASF 1 Push the Paper Release Lever to the Continuous Sheet side front of printer 2 Insert the paper into the push tractor The white guide line on the tractor MUST be visible 3 Press the FORM FEED switch 4 The Paper Bail will automatically open 5 The Line Feed operation will load the paper 6 The Paper Bail will automatically close NOTE If the paper does not advance after the line feed motor has fed the equivalent of 2 4 inches of paper the Auto Load process stops This situation is treated like an ordinary paper end condition Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 30 00 Service Guide ML395 395C OKIDATA Chapter 2 Principles of Operation 2 2 07 Paper Park The Paper Park feature operates as follows The PARK TOF switch is pressed Reverse line feed retracts the paper until a paper end condition exists or until 14 inches of paper has been retracted The paper will remain on the push tractor but out of the printing path Co
55. rademark of Microsoft Corporation PC is a registered trademark of International Business Machine Corporation Proprinter is a registered trademark of International Business Machine Corporation Windows is a trademark of Microsoft Corporation Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 3 OKID AT A Service Guide ML395 395C Chapter 1 Product Specifications 1 1 OVERVIEW 1 1 01 General Information The Microline 395 is a high speed dot matrix printer which utilizes a 24 wire printhead The Microline 395 comes standard with both an RS232 C Serial Interface and a Centronics Parallel Interface The printer is available in either a standard version Microline 395 single color output or a color capable version Microline 395C multiple color output The Microline 395 is capable of emulating the Epson LQ 850 1050 or the IBM Proprinter XL24 printers The Microline 395C emulates the Epson LQ 2550 Epson LQ850 1050 or the IBM Proprinter XL24 Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 4 OKIDATA Service Guide ML395 395C B Chapter 1 Product Specifications 1 2 PRODUCT SPECIFICATIONS 1 2 01 Paper Feed Method Built in push tractor Friction
56. rd 1 Remove the printer unit 3 2 30 2 Disconnect the two cables 1 CN1 and CN2 from the BTFD board 2 3 Remove the two mounting screws 3 4 Detach the BTFD board P N 55066102 PCB BTFD 2 BTF Option RSPL B 2 15 5 Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 66 OKID AT A Service Guide ML395 395C Chapter 3 Maintenance amp Disassembly 3 2 32 Tension Spring 1 Remove the printer unit 3 2 30 lt 2 Detach the tension spring 1 from between the bottom cover 2 and the blind plate 3 P N 50922001 Spring BTF Option RSPL B 2 15 Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 67 OKIDATA Service Guide ML395 395C E Chapter 3 Maintenance amp Disassembly 3 2 33 Sheet Guide 1 Remove the printer unit 3 2 30 lt 2 Remove the sheet guide 1 P N 51002201 Guide Sheet BTF Option RSPL B 2 15 4 Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 68 OKIDATA Service Guide ML395 395C Chapter 3 Maintenance amp Disassembly 3 2 34 B
57. s PARK 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 Load the single sheet paper 7 Print the single sheet To return to continuous feed printing follow this procedure 1 Move the paper selection lever to the continuous form position to the front of the printer 2 Pull the bail lever forward 3 The paper will advance to the loading position 4 Push the bail lever back and adjust the top of form if necessary Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 84 OKID ATA Service Guide ML395 395C 7 Fi Chapter 3 Maintenance amp Disassembly 3 3 08 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 the 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 The operator will be able to tear off the last printed page without wasting paper or readjusting the printer When the printer receives data to print it will automatically return the paper to the top of form position for printing Forms Tear Off can only be used with continuous feed pape
58. s the stopper in the direction of Arrow A P N 50099905 Printhead Assembly RSPL B 2 02 P N 52103601 Ribbon Cartridge Black Nylon Consumable B 2 02 3 1755 P N 52103701 Ribbon Cartridge Color Consumable B 2 02 4 1755 P N 52103801 Ribbon Cartridge Black Film Consumable B 2 02 4 1743 P N 56609701 Cord AC 120V RSPL B 2 02 7 1243 P N 56624101 Cord AC 220V ML Series Option RSPL B 2 02 1 1213 131 P N 70000803 IBM PC Cable Kit Interface Cable B 2 02 3 1255 Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 36 OKIDATA Service Guide ML395 395C E Pr Chapter 3 Maintenance amp Disassembly 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 04 Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 37 A Service Guide ML395 395C OKIDATA Chapter 3 Maintenance amp Disassembly 3 2 03 Ribbon Protector 1 Remove the printhead 3 2 01 7 2 Remove the ribbon guide 3 2 02 lt 3 Remove the two mounting screws 1 4 Lift the ribbon protector 2 and remove it P N 53527001 Protector Ribbon RS
59. selection General Control Forms Tear Off to OFF LINE 2 The printer will print the receipt 3 The printer will advance the receipt to the tear off position and go OFF LINE 4 Tear off the receipt 5 Press SELECT to place the printer ON LINE Continuous Invoices 6 Set menu selection General Control Forms Tear Off to 300 ms 7 The printer will print the invoices without stopping 8 If the final invoice does not print issue a FORM FEED command at the end of the job This will force the last invoice to the print position to complete the job NOTE The page will be advanced to the tear off position after waiting two or four seconds depending on the menu selection for a print signal The paper will then be retracted to the next print position Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 85 OKIDATA Service Guide ML395 395C ar Chapter 3 Maintenance Disassembly 3 4 CLEANING 3 4 01 General Information WARNING When cleaning the printer power OFF the printer and detach the AC power cable from the printer and the AC outlet Cleaning Interval Every six months or 300 hours of operation Cleaning Tools Lint free cloth Soft cloth Vacuum cleaner Platen cleaner Long cotton swabs All purpose cleaner Areas to Clean
60. ssembly 3 2 04 44 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 5 Open the eleven claws and detach the operator panel 5 from the operator panel holder P N 50100001 Panel Operator ML395 RSPL B 2 03 P N 50910505 Spring Cover Open RSPL B 2 03 P N 55071701 PCB TFOP Op Panel RSPL B 2 03 P N 56212601 Switch Interlock Assembly RSPL B 2 03 121 P N 56614301 Cable Microswitch RSPL B 2 034 12 7 Cover Open P N 56628403 Cable Op ML395 RSPL B 2 03 Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 40 OKID AT A Service Guide ML395 395C ESTES Chapter 3 Maintenance amp Disassembly 3 2 06 Control Board TFCB 1 Remove the upper cover assembly 3 2 04 1 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 While slightly lifting the shield cover 4 detach connector CN13 5 and CN11 6 from the control board 7 then remove the shield cover 6 Detach the remaining connectors from the control board 7 Loosen the mounting screw and remove the control board
61. tach the left eccentric collar 3 NOTE The protrusions on the eccentric collars face the outside of the printer 3 Remove the screw and detach the blue printhead gap adjusting lever Not shown 4 Loosen the screw 4 and detach the right eccentric collar 5 5 Remove the two rubber carriage bumpers 6 6 Slide the carriage shaft 7 to the right and remove the carriage 8 7 Continue sliding the carriage shaft to the right then remove the carriage shaft NOTE When installing be sure that the larger extension at the end of the carriage shaft is positioned at the right side of the printer P N Spacer B 2 04 3 055 P N Spacer Round B 2 04 7 05 P N 50057601 Carriage Assembly Black B 2 04 5 07 P N 50069401 Carriage Assembly Color B 2 05 5 10 P N 50703701 Collar Eccentric Carriage Rail RSPL B 2 07 5 10 P N 51110301 Shaft Carriage RSPL B 2 07 4A 104 P N 53478401 Lever Adjust Printhead Gap RSPL B 2 07 4 104 Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 54 OKID AT A Service Guide ML395 395C Chapter 3 Maintenance amp Disassembly 3 2 20 Paper Pressure Guide 1 Remove the two springs 1 located on each side of the paper pressure guide 2 2 Remove the detent spring 3 located on the release lever at the right side of the printer 3 Separate the cla
62. tes the distance between the platen and carriage shaft changes se 1 3 w23 24 Wire Guide Armature Print Wire Thermistor NI ZE 1 N AH Spacer Ring Coll Permanent Magnet Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 25 E Service Guide ML395 395C OKIDATA Chapter 2 Principles of Operation 2 2 02 Spacing Spacing is performed when the servo motor drives the carriage along the carriage shaft parallel to the platen The spacing mechanism consists of the servo 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 Power from the space motor is transferred via the space belt which is attached to the bottom of the carriage frame The carriage is designed to move 1 6 inches when the servo motor performs one rotation Gamage Shaft l pN l foe a 7 po fF A EO Woor A Y al Drive F ulley Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 26 ra FA Service Guide ML395 395C OKIDATA Chapter 2 Principles of Operation 2 2 03 Ribbon Drive The ribbon
63. two columns of 12 wires each Each wire is welded to an armature Behind this armature is a spacer ring Each of the 24 printwire armatures have a permanent magnet behind them The magnets attract the armatures drawing the printwires into the wire guide thus keeping the wires inside the printhead A coil is wrapped around each of the permanent magnets When a dot is to be printed current is passed through the appropriate coil This creates an electromagnetic field which opposes the magnetic field of the permanent magnet The armature can then spring forward and the print wire which is attached to the armature strikes the ribbon and imprints a dot on the paper When current is removed from the coil the magnetic field of the permanent magnet attracts the armature causing the printwire to retract into the wire guide once again The printhead contains a built in thermistor used to monitor the printhead temperature The parts listed below make up the printhead Wire Guide Print Wires Armature Assembly Spacer Permanent Magnet Assembly Thermistor Printed Circuit Board with Coils Head Gap Adjusting The head gap adjusting mechanism adjusts the gap between the platen and printhead This is accomplished by moving the adjusting lever on the left side of the printer mechanism When the lever is moved the carriage shaft rotates Since the carriage shaft is attached to the printer mechanism with eccentric collars as the carriage shaft rota
64. when the printer is set for LIMITED OPERATION Procedure CAUTION Check with the system manager BEFORE changing the setting for the operator panel function 1 Verify that paper is loaded and that the ribbon is installed 2 Power OFF the printer 3 Press and hold QUIET while powering ON the printer 4 Press GROUP until GENERAL CONTROL prints 5 Press ITEM until OPERATOR PANEL FUNCTION prints 6 Press SET until FULL OPERATION prints 7 Press EXIT to exit Menu Mode 8 The printer will go ON LINE SELECT will light Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 82 ru FA Service Guide ML395 395C OKIDATA Chapter 3 Maintenance amp Disassembly 3 3 06 Top of Form General Information Top of form is the place on the page where printing begins When the printer advances paper to the next page it stops at the top of form The Microline 395 and 395C printers store the top of form independently for the three standard paper feed paths Top Rear Bottom Each top of form is set using the same procedure Procedure 1 Select the desired paper path 2 Load paper into the printer by pressing FORM FEED 3 Press SELECT until the printer is OFF LINE SELECT will NOT be lit 4 The red line on the plastic ribbon protector indicates the base of the printing line Use this
65. ws and remove the release lever 4 4 Remove the release link 5 Remove the paper pressure bar 5 by sliding it to the right NOTE The flat side of the paper pressure bar faces up 6 Using needle nose pliers squeeze the nylon latch 6 to release the switch harness 7 which is located at the left side of the printer mechanism 7 Lift and remove the paper pressure guide P N 50907502 Spring Paper Chute RSPL B 2 07 1 1043 P N 50910201 Spring Detent Release Lever RSPL B 2 07 1055 P N 50910305 Spring Idle Gear RSPL B 2 07 4 10 i P N 51214401 Gear Idle Release Lever RSPL B 2 07 3 10 P N 53478706 Lever Release RSPL B 2 07 5 104 P N 53478801 Block Release Lever Guide RSPL B 2 07 5 10 P N 55034801 Sensor Cut Sheet Paper End RSPL B 2 07 4 10 Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 55 OKIDATA Service Guide ML395 395C Chapter 3 Maintenance amp Disassembly 3 2 21 Printhead Gap Release Lever Microswitches 1 Remove the mounting screw to remove the release lever microswitch 1 2 Push down on the mounting tab and remove the printhead gap microswitch 2 3 Using a needle nose pliers detach the nylon cable clamp 3 and remove the harness and switches from the printer mechanism P N 53068602 Indicator PH Gap Adj Bracket RSPL B

OKI ML395C Printer

Contents

Download Pdf Manuals

Related Search

Related Contents