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ML380 Dot Matrix Printer

1. mem d H e Mille iR aaa P IR cee 2 0 X LED ui a a Test Points LEDT SS B B Ou py 35V 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 OKIDATA Service Guide ML380 Chapter A Board Diagrams Page 120 A 2 03 RS232 C Serial Module UMRS Firmware Q3 Control Program PROM Fuses NONE Jumpers SP1 Side 1 2 External ROM Side 2 3 Internal ROM Sensors NONE Switches NONE Testpoints CN1 Pin 18 see diagram 5 vdc Q4 Pin 14 9 vdc Q4 Pin 16 9 vdc NOTES Check on solder side of board with cover removed Be careful not to damage any components when cover is removed Instructions for running the Serial Loopback Diagnostic are contained in the Printer Handbook Appendix D Construct a loopback connector as shown using a DB 25 M connector Solder Side eee Component Side 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 121 OKIDATA Service Guide ML380 A Chapter B Illustrated Parts Listing B 1 OVERVIEW B 1 01 General Information This appendix will assist you in identifying the assemblies and parts of the product Use Section Four Failure
2. Width 7 2 to 10 inches 182 to 254 millimeters Length 3 to 14 inches 76 2 to 356 millimeters Thickness 0 0028 to 0 0039 inches 0 07 to 0 1 millimeters Envelopes Number of Copies Original Paper Feed Path Bottom Printhead Gap Information Refer to the Printhead Gap Information Section 1 6 Size Single Feed Minimum 6 5 x 3 6 inches 16 5 x 9 1 centimeters Maximum 9 5 x 4 1 inches 24 1 x 10 4 centimeters Continuous Non overlap type Thickness 016 inches 41 millimeters Maximum Weight 17 to 24 Ibs 64 to 90 g m 2 Maximum Labels Length 3 to 14 inches 76 2 to 356 millimeters Number of Copies Original Paper Feed Path Bottom Printhead Gap Information Refer to the Printhead Gap Information Section 1 6 Weight N A Width Carrier 3 5 to 8 5 inches 88 to 261 millimeters Thickness 01 inches 0 25 mm Maximum including backing CAUTION Use Bottom Feed and or optional Pull Tractor for card stock and labels DO NOT use fabric labels DO NOT print on the edge or perforation of the label DO NOT use Paper Park with labels Transparency NOTE Roller marks may mar the transparency under high temperature high humidity conditions Length 3 to 14 inches 76 2 to 356 millimeters Number of Copies Original Paper Feed Path Top Printhead Gap Information Refer to the Printhead Gap Information Section 1 6 Weight 12 to 24 Ibs 45 to 90 g m 2 Width 8 5 to 11 inches 216 to 280 millimete
3. The data from the interface is received through connector CN 1 and the Interface LSI Q7 latches this data in sync with the STB signal The BUSY signal is switched ON as the data is processed When processing is completed the BUSY signal is switched OFF and an ACK signal is sent to the host to request more data The BUSY signal is also switched ON when the printer is not able to receive data buffer is full printer is deselected or an error condition exists a y v mee eee CC ACK 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 18 TA Service Guide ML380 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 pulsewidth The pulsewidth of the HD ON signal varies with the number of pins being driven The drive time increases as more pins are driven and decreases as fewer pins are driven The RC circuit compensates for the fluctuation of drive voltage 35 vdc CRAFT 15 CP HD OFF 1 4 HC CH HO 1 74 M M au RC vrai ter
4. i PRAITHEAD I i LL LI a E L HATH BLISS IN TERE A ATURE SEHZDOR CET EEL EEL Eom oco a D e omo ommo m m ee eee x A dh Wa oda dm OD NO M mH DEO AED eee eee comes oc m cA ee LEE M LI E ie Vr Lr X LLLI LVL 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 an Service Guide ML380 OKIDATA Chapter 2 Principles of Operation 2 1 03 Initialization The printer is initialized whenever it is powered 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 Q8 Pin 1 to Q5 Q6 and Q7 When RST P is generated ROM program execution starts with the mode setting of Q5 Q6 and Q7 Next ROM and RAM are checked for errors RAM is initialized and the carriage is homed The program finally establishes the Interface signals output level of ACK BUSY etc switches the SELECT indicator ON and informs 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 mm AT A Service Guide ML380 OKIDATA Chapter 2 Principles of Operation 2 1 04 Interface Control Parallel Interface
5. 3 3 09 Resets Reset Menu to Factory Defaults CAUTION Once the menu has been reset all customized menu settings will be lost Always print the menu before resetting the printer to factory defaults To reset the menu to factory default settings follow this procedure 1 Before resetting the Menu Okidata STRONGLY RECOMMENDS printing the Menu Printing the Menu provides a reference of customized settings When the Menu is reset all customized settings are LOST 2 Power off the printer 3 Press and hold SEL and FEED while powering ON the printer NOTE Hefer to the Printer Handbook for a list of the factory default settings 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 r an Service Guide ML380 OKIDATA Chapter 3 Maintenance amp Disassembly 3 4 CLEANING 3 4 01 General Information NOTE Always power OFF the printer before cleaning Clean the inside of the printer every 6 months or 300 hours of operation which ever comes first It will take approximately 10 minutes to clean the printer Use a dry lint free cloth and vacuum cleaner Areas to be Cleaned Carriage Shaft and Vicinity Remove or vacuum out the paper particles wipe out dirt dust ribbon waste etc Paper Feed Area and Pin Surfaces Clean the pin roller part of platen Paper End Sensor Wipe or vacuum
6. The process repeats until the test is stopped 14 Press MODE to stop the test 15 Remove the test connector 16 Install the serial interface cable 17 Power OFF the printer 18 Press and hold FONT while powering ON the printer This will place the printer in Menu Mode 19 Press GROUP until you access the Serial Interface group 20 Press ITEM until you access the Diagnostic Test item 21 Press SET until NO is specified 22 Press SELECT to exit Menu Mode NOTE f you do not set Diagnostic Test to no the printer will enter the test mode at each power 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 105 an Service Guide ML380 OKIDATA Chapter 4 Failure amp Repair Analysis Serial Cable Information The information in this section will help you make a serial cable to connect between the printer and computer Refer to the computer documentation to determine the cable requirements on the computers end The printer has the following cable requirements Shielded RS 232C cable UL and CSA approved No more than 50 feet long Cannon DB 25P plug or equivalent with 25 pins Cannon DB C2 J9 or equivalent connector shell Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updat
7. Uni directional Hk Ha a Full Operation Na Tag Parallel amp LFI off mo Ao 1i 1i Set I American Slashed Walid Invalid Bay Nona B Ready Busy Ho 55D bead RPS valid Ready on Power Up 280 ms LQ Courier 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 67 an Service Guide ML380 OKIDATA Chapter 3 Maintenance amp Disassembly Reset Menu to Factory Defaults CAUTION Once the menu has been reset all customized menu settings will be lost Always print the menu before resetting the printer to factory defaults To reset the menu to factory default settings 1 Before resetting the Menu Okidata STRONGLY RECOMMENDS printing the Menu Printing the Menu provides a reference of customized settings When the Menu is reset all customized settings are LOST 2 Power OFF the printer 3 Press and hold SEL and FEED while powering ON the printer 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 rA Service Guide ML380 OKIDATA Chapter 3 Maintenance amp Disassembly Limited Operation General Information One of the menu selections that may be set by the end user is the operator panel function
8. 125 TA Service Guide ML380 OKIDATA Chapter B Illustrated Parts Listing B 2 01 Printer Part numbers are subject to change Refer to Okilink II for current part numbers and pricing information iul P N Description Comments Disassembly bul P N Procedure 62407901 N A Printer ML380 Refer to B 1 02 Parallel 120V Epson LQ Comp 62407902 N A Printer ML380 Refer to B 1 02 Parallel 220V Epson LQ Comp 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 126 OKID AT A Service Guide ML380 Chapter B Illustrated Parts Listing B 2 02 Covers Part numbers are subject to change Refer to Okilink II for current part numbers and pricing information Okidata P N Description Comments Disassembly Oki J P N Refer to B 1 02 3 7 Procedure 50071101 Separator Sheet RSPL Inc 2 4 3 2 03 2PA4094 1078G1 Assembly 50071201 Separator Sheet 1PP4094 1079P1 53510201 Support Sheet 3 2 03 4 1PP4094 1080P1 53510401 Guide Sheet L 3 2 03 2PP4094 1082P1 53510301 Guide Sheet R 3 2 03 4 2PP4094 1081P1 53510001 Cover Middle RSPL 3 2 03 1PP4094 1076P1 54148708 Screw No 3x 8MM RSPL 3 2 20 T2P3 8 HHC Self Tapping 53330101 Plate Shield RSPL 3 2 20 4 2PP4094 1085P1 53510601 Cover Lower RSPL 3 2 20 5 1PP4094 1074P1 53452701 Foot Rubber RSPL 3 2 20
9. 2 03 j P N 56304101 Fuse 125V 3 15A RSPL B 2 03 P N 56304501 Fuse 250V 1 25A 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 56 AWAIT AT A Service Guide ML380 OKIDATA Chapter 3 Maintenance amp Disassembly 3 2 22 Space Motor Assembly 1 Perform these procedures 3 2 01 7 3 2 03 and 3 2 20 2 Raise the printer mechanism 1 and remove the space motor cord 2 from the guides 3 3 Open the two claws 4 and pull the space motor assembly 5 in the direction of arrow A 4 Remove the brackets 6 from the guide holes 7 of the main frame and remove the space motor assembly NOTE Installation On installation align the brackets with guide holes and push the space motor assembly down until it snaps into position under the two claws Perform the space belt tension adjustment procedure after installing this part Refer to Section 3 3 of this Service Handbook P N 56507901 Motor Space Assembly RSPL B 2 05 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 opx okidata com Page 57 TA Service Guide ML380 OKIDATA Chapter 3 Maintenance amp Disassembly 3 2 23 Bottom Paper Guide Lever 1 Perform these proced
10. 2A 52046201 Label Kit Document N A N A 3A 58055201 Sheet Cover Letter Document N A N A 4A 59238901 Guide Study Document N A N A 5A 59238701 Manual Training N A N A 6A 59235901 Handbook Printer Document N A N A 7A 59238801 Service Videotape Document N A N A 8A 52046202 Label Service Document N A N A Videotape Case 9A 52046202 Label Service Document N A N A Videotape Front 10A 52046202 Label Service Document N A N A Videotape Spine 11A 57517101 Red Vinyl Case Document N A N A VHS Videotape N A P N 58217702 Microline 380 Service Training Kit This kit was replaced by P N 58217703 Items in the training kit except for the Printer Handbook are NOT available separately Okidata P N Oki J Description Comments Disassembly P N Refer to B 1 02 Procedure 1B 58217702 N A Kit ML380 Service Document N A Training 2B 52046201 Rev B L abel Kit Document N A N A 58055202 N A Sheet Read Me N A First 4B 59238702 N A Handbook Service N A 5B 59261901 N A User s Document N A Documentation 59235903 N A Handbook Printer N A P N 58217703 Microline 380 Service Training Kit This kit replaces P N 58217702 Items in the training kit except for the Printer Handbook are NOT available separately Okidata P N Description Comments Disassembly Oki J P N Refer to B 1 02 Procedure 1B 58217703 Kit ML380 Service Document N A N A Training 2B 52046203 L abel Kit Document N A N A 3 B 58055203 Sheet Read Me Firs
11. 4 7 REPAIR ANALYSIS PROCEDURES RAPs 4 7 01 Using the RAPs When using the Repair Analysis Procedures follow these steps 1 Go to the RAP Index 2 Find the RAP which is associated with the printers problem 3 Go to the appropriate RAP 4 All RAPs begin with a START statement followed by questions or another type of statement 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 93 OKIDATA Service Guide ML380 7 Chapter 4 Failure amp Repair Analysis 4 7 02 RAP Index ear Dewipion Line Feed Problems Data Receiving Failure 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 94 r an Service Guide ML380 OKIDATA Chapter 4 Failure amp Repair Analysis RAP 01 No Power START Is AC cable connected correctly NO Connect the AC cable correctly YES Is the AC fuse F1 on the transformer assembly open YES Replace the fuse NO Are 5V and 35V output on the control board Refer to Appendix A of this Service Handbook YES Go to A A Check fuses F1 and F2 on the control board Are they open YES Replace the open fuses s NO Is the connector CN9 on the control board connected properly NO Attach connector CN9 properly YE
12. 5 4PB4025 1137P1 53510101 Cover Access RSPL 3 2 03 5 1PP4094 1077P1 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 127 Service Guide ML380 Chapter B Illustrated Parts Listing OKIDATA B 2 03 Printer Unit Part numbers are subject to change Refer to Okilink II for current part numbers and pricing information Okidata P N Oki J Description Comments Disassembly P N Refer to B 1 02 Procedure 1 N A AC Cable 3 2 01 5 3YS4011 1187P1 2 53511401 Separator Paper RSPL 3 2 01 5 2PP4043 3688P1 3 50079301 Printhead RSPL 3 2 02 4 4YA4023 2011G2 4 51901101 Knob Platen RSPL 3 2 03 5 3PP4025 2871P1 5 55047801 PCB UMMB Main RSPL 3 2 08 4Y A4042 1450G1 1 Control w o ROM 99938501 IC EEPROM RSPL 3 2 08 816A0326M0000 BR93CS46 Z NW 7 56304201 Fuse 125V 1 6A RSPL 3 2 08 540A2046M1162 56304301 Fuse 125V 2 5A RSPL 3 2 08 540A2046M1252 53524301 Sheet Operation RSPL 3 2 09 5 3PP4043 3783G1 Panel 10 50071301 Cover Lower RSPL 3 2 20 5 1PA4094 1073G1 Assembly 11 56408201 Power Supply Unit RSPL 3 2 21 4YB4049 1482P1 120V 11 56408301 Power Supply Unit RSPL 3 2 21 4YB4049 1498P1 220 240V 12 56304101 Fuse 125V 3 15A RSPL 3 2 21 540A2046M1322 12 56304501 Fuse 250V 1 25A RSPL 3 2 21 540A2058T2132 Copyright 1997 Okidata Division of OKI America Inc All righ
13. Analysis to determine the defective part s Locate the part and its part number in this section Appendix B is cross referenced to Section Three Maintenance Format The format for this appendix is a series of tables with diagrams The tables contain the item reference number the Okidata and Oki Japan Oki J part numbers the part description a comments section and the disassembly procedure o kkdata P JN Description Comments hsassembhhy Ok PH Referto 61 02 Procedure Items with the comments RSPL Recommended Spare Parts List Consumable Document or Option are available from Okidata Items without these comments are usually not stocked Some items are only available as assemblies Every effort has been made to clearly indicate which items are in assemblies and which are not N A will appear where a part number is not available Current Part Numbers Okidata has made every effort to include current part numbers in this Service Handbook at the time of publishing However technical information frequently changes These changes often include new or modified parts with new or modified part numbers Please refer to the following resources for current part numbers and pricing Okidata s Electronic Bulletin Board Okilink II contains current part numbers prices and recommended stocking levels for each item listed as a recommended spare part For instructions on accessing Okilink II refer to the Service Center Reference Gu
14. 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 OKIDATA Service Guide ML380 e Chapter 2 Principles of Operation 2 2 02 Spacing opacing is performed when the main shaft installed in parallel with the platen and carriage mounted on the space rack are driven by the pulse motor opacing involves the parts listed below Pulse Motor Drive Pulley Idle Pulley Carriage Shaft Carriage Frame opace Rack Spacing Operation The carriage containing the printhead moves parallel to the platen along the main carriage shaft and space rack Power from the space motor is transferred via the mini pitch belt which is attached to the bottom of the carriage frame When the pulse motor rotates clockwise as viewed from above the driving force is transmitted to the mini pitch belt through the drive pulley and the carriage moves from left to right The carriage is designed to move 0 8 inch when the pulse motor performs one rotation 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 rotates the distance between the
15. 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 6 OKIDATA Service Guide ML380 Chapter 1 Product Specifications 1 4 ENVIRONMENTAL CONDITIONS 1 4 01 Acoustic Rating 57 dBA 1 4 02 Altitude 10 000 feet 3 050 meters 1 4 03 Ambient Temperature and Relative Humidity RH While operating 41 to 95 degrees Fahrenheit 5 to 35 degrees Celsius Operating humidity 20 to 80 RH While in storage 40 to 158 degrees Fahrenheit 40 to 70 degrees Celsius Storage humidity 5 to 95 RH 1 4 04 Impact Non operating 3 G or less 1 4 05 Vibration Operating 0 3 G 5 to 150 Hz or less except at resonating frequency Non Operating 1 G 5 to 150 Hz or less except at resonating frequency 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 te Service Guide ML380 OKIDATA Chapter 1 Product Specifications 1 5 AGENCY APPROVALS 1 5 01 Listings UL No UL Standard No 478 and 114 CSA No CSA Standard C22 2 No 154 FCC FCC Certified per Part 15 Subject J Class B VDE VDE 0806 0875 Class B and 0836 BS BS 5850 6204 IEC 435 380 Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX f
16. Operator Panel Function is an item in the General Control Group of the menu This item may be set to either Full Operation or Limited Operation If the Operator Panel Function is set to Limited Operation the menu cannot be accessed and the operator panel switches listed below are not active 1 Font 2 Pitch The Operator Panel Function item is frequently set to Limited Operation on networks or other areas where many users share a printer Limited Operation prevents the printer settings from being changed Procedure To return the printer to Full Operation you must modify the menu CAUTION Determine the preference of the end user regarding this feature If the printer is on a network do not reset this item without discussing the change with the network supervisor To access the menu when the printer is set to Limited Operation follow this procedure 1 Verify that continuous feed paper is installed CAUTION If paper is not installed the printhead will print on the platen This could damage destroy the printhead platen and ribbon 2 Verify that the ribbon is correctly installed 3 Power off the printer 4 Press and hold FONT while powering ON the printer 5 The SELECT lamp will not be lit When in Menu Mode the functions printed below the operator panel switches are active 6 Press GROUP until General Control prints 7 Press ITEM until Operator Panel Function prints 8 Press SET until FULL OPERATION prints 9
17. Pin 11 Pin 6 to Pin 20 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 104 OKID AT A Service Guide ML380 aif Chapter 4 Failure amp Repair Analysis Procedure 1 Load continuous feed paper 2 Verify that the printer is selected SELECT lamp is lit 3 Press the FONT and PITCH buttons at the same time This places the printer in Menu Mode The SELECT lamp will go out 4 Press GROUP until you access the Serial Interface group 5 Press ITEM until you access the Diagnostic Test item 6 Press SET until YES is specified 7 Press SELECT to exit Menu Mode 8 Power OFF the printer 9 Remove the serial interface cable 10 Install the test connector 11 Power ON the printer This will start the test 12 The printer will check the memory function and the signal logic If both are functioning properly the following will be printed LOOP TEST RAM GOOD I F GOOD If either is malfunctioning the following will be printed LOOP TEST RAM BAD if the memory function is faulty I F BAD if the signal logic is faulty 13 The printer will generate a test pattern send the data through its transmit and receive circuits and write the data to its message buffer It will then print the stored data The test pattern consists of the ASCII characters equivalent to the decimal values 32 to 126
18. Press EXIT to save the change and exit Menu 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 69 an Service Guide ML380 OKIDATA Chapter 3 Maintenance amp Disassembly Menu Settings Factory default settings are printed in Bold Italic Font Print Mode LQ Courier LQ Swiss LQ Roman LQ Orator LQ Prestige LQ Gothic Utility Pitch 10 12 15 17 1 20 cpi Proportional otyle Normal Italic Size Single Double Cut Sheet Feeder Not Installed Installed General Control Graphics Uni directional bi directional No Yes Paper Out Override Print Registration O 1 2 3 4 5 5 4 3 2 1 Operator Panel Functions Full Operation Limited Operation Interface Parallel Serial Vertical Control Line Spacing 6 8 LPI Form Tear Off Off On Skip Over Perforation No Yes Auto LF No Yes 11 112 3 12 14 3 3 54 55678 8 5 Character Set Set I Set ll Epson Language Set American French German British Danish Swedish Italian Spanish Page Length oymbol Sets Japanese Norwegian Danish Il Spanish I Latin American French Canadian Zero Character Slashed Unslashed Invalid Valid Serial I F None Odd Even Ready Busy X ON X OFF Baud Rate 9600 4800 2400 1200 600 300 19200 bps DSR Signal Valid Invalid DTR Signal Ready on Power Up Ready on Select Copyright 1997 Okidata Div
19. can be removed 3 Pull the head cables under the cable guides 4 and remove the head cables P N 56725301 Connector Head Assembly RSPL B 2 06 Head Cable 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 42 OKID AT A Service Guide ML380 E Chapter 3 Maintenance amp Disassembly 3 2 08 Main Control Board UMMB 1 Perform these procedures 3 2 01 and 3 2 03 7 2 Remove the five connectors 1 connected to the control board 2 3 Remove the five screws 3 4 Release the two claws 4 and move the control board in the direction of arrow A to remove P N 55047801 PCB UMMB Main Control RSPL B 2 03 j w o ROM P N 55938501 IC EEPROM BR93CS46 Z NW RSPL B 2 03 4 P N 56304201 Fuse 125V 1 6A RSPL B 2 03 P N 56304301 Fuse 125V 2 5A 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 43 TA Service Guide ML380 OKIDATA Chapter 3 Maintenance amp Disassembly 3 2 09 Operation Panel 1 Perform these procedures 3 2 01 and 3 2 0343 2 Use a screwdriver to release the six claws 1 on the operation panel 2 and remove the operation panel from the control board 3 P N 53524301 Sheet Operation P
20. 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 Items 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 procedures while servicing the unit Be sure to read all notes cautions and warnings as they contain important information regarding disassembly assembly 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 DATA Service Guide ML380 OKI a fi Chapter 3 Maintenance amp Disassembly 3 2 01 Paper Separator 1 Raise the access cover 1 2 Move the bail lever 2 toward the front o
21. the second pin in the direction of arrow A until the switch clears the bracket 4 4 Remove the microswitch assembly P N 56211301 Microswitch Assembly SASF RSPL B 2 05 5 Enlarged View S ASPF switch Location 3 2 8a tif Pin is on back of SN the switch fy t 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 DATA Service Guide ML380 OKI p Chapter 3 Maintenance amp Disassembly 3 2 19 Microswitch Assembly Home Position Switch 1 Perform these procedures 3 2 01 and 3 2 0343 2 Open the switch clamp 1 and release the home position switch 2 from the pin 3 3 Pull the switch through the opening 4 in the printer frame 4 Release the cables from the guides on the frame 5 Remove the microswitch assembly P N 56211301 Microswitch Assembly RSPL B 2 05 Home 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 54 A a A Service Guide ML380 OKIDATA Chapter 3 Maintenance amp Disassembly 3 2 20 Printer Mechanism 1 Perform these procedures 3 2 01 7 and 3 2 03 1 2 Open the claws 1 of the lower cover assembly 2 and lift the printer mechanism 3 to remove it P N 54148708 Screw
22. 043 3762P1 Assembly 53510901 Lever Bottom RSPL 3 2 23 3PP4043 3690P1 Paper Guide 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 130 OKID AT A Service Guide ML380 Chapter B Illustrated Parts Listing B 2 06 Printer Mechanism 3 of 3 Part numbers are subject to change Refer to Okilink II for current part numbers and pricing information Okidata P N Description Comments Disassembly Oki J P N Refer to B 1 02 4 Procedure 1 50071501 Gear Ribbon Feed RSPL 4PA4043 3767G1 Assembly 51304001 Belt Mini Pitch RSPL 4PB4043 3759P 1 Space Belt 51004001 Slider RSPL 3 2 06 4PP4043 3768P 1 53330401 Plate Carriage RSPL 2PP4043 3801 P1 50704701 Clamp Belt RSPL 4PP4043 3802P 1 56725301 Connector Head RSPL 3 2 07 5 3PB4043 3766P1 Assembly Head Cable 7 50702901 Clamp Head RSPL 3 2 13 4PP4025 1048P1 53056201 Protector Ribbon RSPL 3 2 13 3PP4025 2836P 1 53330201 Frame Carriage RSPL 4PP4043 3764G1 50071901 Tractor Pin L RSPL 4PA4043 3779G1 Assembly 51003901 Guide Center RSPL 4PP4043 3741P1 50071801 Tractor Pin R RSPL 4PA4043 3778G1 Assembly 51109503 Shaft Drive RSPL 4PB4043 3865P1 4 51110601 Shaft Lock RSPL 4PP4043 3784P1 Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX fo
23. 380 7 Chapter 4 Failure amp Repair Analysis 4 4 04 Tips for Preventing Image Problems 1 Make sure that the ribbon is not dried out If the printer output is faded install a new ribbon then print another sample 2 Make sure that the paper you are using is within specifications Paper specifications can be found in Section 1 of this Service Handbook 3 Make sure that the printhead gap adjust lever is in the appropriate position for the paper being used 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 88 OKID AT A Service Guide ML380 aif Chapter 4 Failure amp Repair Analysis 4 4 05 Common Problems 1 Nothing happens at all when the operator powers ON the printer The printer may not be plugged in Check the power cord connection to the outlet If you re using a power strip make sure its turned on Check to be sure that the external line fuse hasn t blown or that the circuit breaker hasn t tripped 2 The printer doesn t print when the computer sends it data The printer may be deselected If the SELECT lamp is not lit press the SELECT button 3 The paper keeps jamming Be sure to set the top of form so that the paper is held in place by the bail If the top of the page is below the bail it will catch on the bail as it advances Don t use the FEED button to load pa
24. 6 3 2 10 3 2 12 3 2 12 3 2 12 3 2 12 3 2 12 3 2 13 3 2 13 3 2 13 3 2 13 3 2 13 19 90061305 Platen Assembly RSPL 2 14 5 3PA4025 2811G5 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 18 N A Code Earth 2 13 1 4YS4011 1607G2 Page 129 Service Guide ML380 Chapter B Illustrated Parts Listing OKIDATA B 2 05 Printer Mechanism 2 of 3 Part numbers are subject to change Refer to Okilink II for current part numbers and pricing information 5 Not Shown Disassembly Procedure Okidata P N Description Comments Oki J P N Refer to B 1 02 50071701 Chute Paper RSPL 3PA4043 3777G1 Assembly 53511201 Lever Release RSPL 3PP4043 3703P1 51219101 Gear Change RSPL 4PP4043 3705P1 50915101 Spring Change RSPL 4PP4043 3782P1 Gear 58227501 Kit Idler Change RSPL Inc 6 N A Gear ML300 51216001 Gear Idler 4PP4025 2868P 1 53511301 Link Release RSPL 3PP4043 3704P 1 50071601 Roller Pressure RSPL 3PA4043 3773G1 Assembly 50911501 Guide Paper RSPL 3PP4025 2819P1 Pressure 51216101 Gear Tractor RSPL 4PP4025 2869P 1 56211301 Microswitch RSPL 4YX4043 3780G1 Assembly SASF 56211301 Microswitch RSPL 4YX4043 3780G1 Assembly Home Position 3 2 15 NO RSPL 50071401 Chassis 2PA4043 3751G1 Mechanism Assembly 56507901 Motor Space RSPL 3PB4
25. 8 OKID AT A Service Guide ML380 Chapter 4 Failure amp Repair Analysis RAP 05 Data Receiving Failure START Is the SELECT Lamp ON NO Press the SELECT Switch YES Is the interface cable connected correctly NO Connect it correctly YES Is the serial interface module properly seated NO Properly install the serial interface module YES Are the serial interface parameters properly set in the menu Refer to the Printer Handbook Chapter Three OR Refer to Section Three of this Service Handbook YES Replace the serial interface module NO Set the serial interface parameters through the menu Refer to the Printer Handbook Chapter Three End of 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 Page 99 c Service Guide ML380 OKIDATA Chapter 4 Failure amp Repair Analysis 4 8 PRINTER TESTS 4 8 01 General Information This section covers the tests listed below Rolling ASCII Test Font Test Serial Interface Loopback Test Hexadecimal Dump Mode The Rolling ASCII and Font Tests check print operations The Serial Interface Loopback Test checks the operation of the serial interface board The Hexadecimal Dump Mode checks the data transfer between the computer and printer Copyright 1997 Okidata Division of OKI America Inc All rights reserved See th
26. 80 j Chapter 4 Failure amp Repair Analysis 4 8 05 Hexadecimal Dump Mode General Information The hexadecimal dump mode allows you to view the data sent from a computer to the printer When the printer is in hex dump mode all data received both printable characters and control codes will be printed in both hexadecimal and ASCII format NOTE In the ASCII format all non printable characters will be represented by a period Example Below is a line of BASIC code LPRINT CHR 27 0 CHR 30 This is an example of hexadecimal dump Below is the same line as it would appear in Hexadecimal Dump Mode 1B 30 1E 54 68 69 73 20 69 73 20 61 6E 20 65 78 0 This is an example of a hexadecimal dump 61 6D 70 6C 65 20 66 20 61 20 68 65 78 61 64 65 63 69 6D 61 6C 20 64 75 6D 70 2E 0D OA Procedure Follow these steps to engage the Hexadecimal Dump Mode 1 Make sure the printer is connected to a computer 2 Verify that paper is loaded 3 Verify that the ribbon and printhead are correctly installed 4 Power OFF the printer 5 Press and hold the SELECT and TOF PARK buttons while powering ON the printer 6 All data sent to the printer including text and printer commands will print in both hexadecimal and ASCII format In the ASCII format all non printable codes will be represented by a period 7 To return to normal printing power OFF the printer Then power ON Copyright 1997 Okidata Division of OKI America Inc Al
27. ATA Chapter 1 Product Specifications 1 10 OPTIONS 1 10 01 Cut Sheet Feeders CSF 3800 Single Bin with envelope capability Paper Width 7 2 to 8 5 inches 182 to 216 millimeters Paper Length 10 1 to 11 7 inches 257 to 297 millimeters Capacity 50 sheets 20 Ib 1 10 02 Pull Tractor Kit Bottom Feed Rear Feed For Push Pull Operation Paper Types Continuous Feed and Labels 1 10 03 Serial Interface Super Speed 19 2K RS 232C Ready Busy X On X Off Protocols Can be configured through the Menu When the serial interface module is installed the printers parallel interface connector is NOT accessible 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 13 an Service Guide ML380 OKIDATA Chapter 1 Product Specifications 1 11 RELIABILITY 1 11 01 Mean Time Before Failure MTBF Approximately 4 000 hours 2596 duty cycle 3596 page density 1 11 02 Mean Time To Repair MTTR Approximately 15 minutes to major sub assembly level 1 11 03 Printer Life Approximately 12 000 hours of power on time 2596 duty cycle 3596 page density 1 11 04 Printhead Life Average 200 million characters in 10 cpi utility mode normal 25 duty 35 page density 1 11 05 Ribbon Life Approximately 2 million characters in 10 cpi mode 1 11 06 Warranty Limited One year parts labor and p
28. N A N A 3 Ring Binder 15 58067201 ABCD Warranty Document N A N A Claim Forms Pkg of 20 58052401 Warranty Summary Document N A Forms Pkg of 20 17 N A Printer Drivers Refer to Okilink N A 18 N A Product Updates Document Refer to N A N A Okilink 19 N A Recommended Document Refer to N A N A Spare Parts List Okilink 20 N A Software Refer to Okilink N A N A 21 N A Technical Service Document Refer to N A N A Bulletins Okilink N A 23 N A Okidata Marketing Document N A i N A Literature Order Form To order Marketing Literature complete an Okidata Marketing Literature Order Form Fax the completed form to Okidata Marketing Communications Obtain this form by faxing a request to Okidata Marketing Communications Refer to the Service Center Reference Guide for information on contacting Okidata 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 135 OKIDATA Service Guide ML380 r a E Chapter B Illustrated Parts Listing B 2 11 Service Training Kit Revision List P N 58217701 Microline 380 Service Training Kit This kit was replaced by P N 58217702 Items in the training kit except for the Printer Handbook are NOT available separately Okidata P N Description Comments Disassembly Oki J P N Refer to B 1 02 7 Procedure 1A 58217701 Kit ML380 Service Document N A N A Training
29. No 3 x 8 MM Self Tapping RSPL B 2 02 j P N 53330101 Plate Shield RSPL B 2 02 P N 50071301 Cover Lower Assembly RSPL B 2 03 5 P N 53510601 Cover Lower RSPL B 2 02 j P N 53452701 Foot Rubber RSPL B 2 02 j P N 50071401 Chassis Mechanism Assembly 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 55 PN D AT A Service Guide ML380 OK rere Chapter 3 Maintenance amp Disassembly 3 2 21 Power Supply Unit 1 Perform these procedures 3 2 01 7 3 2 03 and 3 2 2043 2 Open the claws 1 and remove the AC power cord shock restraint 2 3 Remove the two screws 3 4 Remove the grounding cord 4 to the AC power cord 5 5 Remove the grounding cord 6 to the transformer 7 6 Remove the four screws 8 7 Remove the transformer the AC switch 9 and the AC power cord from the lower cover assembly 10 8 The power supply unit is made of the grounding cords the transformer the AC switch and the connector 11 NOTE Installation Firmly insert the AC switch into the A and B guides of the lower cover The side with the red line goes is the front Be careful not to cover the grounding mark 12 when installing the grounding cords P N 56408201 Power Supply Unit 120V RSPL B 2 03 P N 56408301 Power Supply Unit 220 240V RSPL B
30. OFF 64 qute Printing the Menu 65 Sample Menu 66 T Reset Menu to Factory Defaults 67 TR Limited Operation 68 Menu Settings 69 3 3 06 Top of Form 70 3 3 07 Paper Park 71 3 9 08 Paper Tear Off 72 3 3 09 Resets 13 3 4 Cleaning 74 3 5 Lubrication 75 3 6 Shipping Instructions 76 4 Failure amp Repair Analysis 4 1 Failure amp Repair Analysis Introduction 77 4 1 02 Printer Serial Number Identification 78 4 1 03 Firmware Revision Identification 79 4 2 Reporting Problems General Information 80 Table of Contents 4 2 02 Problem Lists 4 2 03 Reporting Methods 4 3 Troubleshooting Updates General Information 4 4 Troubleshooting Tips 4 4 02 Problem Categories 4 4 03 START HERE Flowchart 4 4 04 Tips for Preventing Image Problems 4 4 05 Common Problems 4 5 Abnormal Output 4 6 Fault Alarms General Information 4 6 02 Fault Alarm Lamp Display 4 7 Repair Analysis Procedures RAPS Using The RAPS 4 7 02 RAP Index RAP 01 No Power TEN RAP 02 Space Operation Does Not Operate Normally HERES RAP 03 Wrong Character or Missing Dots pobre RAP 04 Line Feed Trouble RAP 05 Data Receiving Failure 4 8 Printer Tests General Information 4 8 02 Rolling ASCII Test 4 8 03 Font Test 4 8 04 Serial Interface Loopback Test General Information Loopback Connector Configuration Diagram Procedure T serial Cable Information Serial Interface Signal Requi
31. OTE Using the front panel or commands sent from the computer will override the features set in the menu However when the printer is powered OFF features set by these methods will be canceled Features set in the menu will stay in effect even when the printer is powered OFF General Information Menu Select Mode allows customization of printer settings and features Selections made are stored in the printers permanent memory However they can be changed through software commands control panel settings or by resetting the menu When the printer is in Menu Select Mode the function of the control panel buttons corresponds to the label below them EXIT GROUP ITEM SET and PRINT The Menu is made up of a number of Groups Each Group has a list of Items Each Item has several Settings Refer to the Printer Handbook for a full explanation of menu selections There are two ways of entering the Menu Select Mode from the Print Mode or when the unit is powered OFF 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 63 an Service Guide ML380 OKIDATA Chapter 3 Maintenance amp Disassembly From Print Mode 1 Load continuous feed paper 2 Verify that the ribbon is correctly installed 3 Verify that the printer is powered ON and the SELECT lamp is lit 4 Press the FONT and PITCH b
32. Page 1 Service Guide ML380 Chapter 0 About This Manual OKIDATA Service Manual ML380 Dot Matrix Printer 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 ML380 0 About This Manual Front Cover 1 Manual Copyright 2 1 Product Specifications 1 1 Overview 3 1 2 Physical Specifications 4 1 3 Power Requirements s 1 4 Environmental Conditions 6 1 5 Agency Approvals 7 1 6 Operational Specifications 8 1 7 Paper Specifications 9 1 8 Memory Specifications 10 1 9 Consumables 11 1 10 Options 12 1 11 Reliability 13 2 Principles of Operation 2 1 Principles of Operation General Information 14 2 1 02 Microprocessor 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 Mechanical Operation Printhead Mechanism 24 2 2 02 S
33. RABCDEPGHE ASTUTE DL _ abodetghd Jk lmnopere tusey E LO 1B CPI ZUPER 5UESDHITT TOR bbe ea OER po PREP ELERT ARNIE aod parargyusEpril 3 RAS pte Pee ed ee ee E abudgeszahlikimsceparssgvwereyrili eC he re Pee ee Le eh EHBTU WETEL i arr mishibwimmapmrab vusphris Lg AWIS i18 CPI DOUBLE WIDTH HWEISHT 1 8 0123456789 7 78ABC HIJKLMNOPQRSTUVWXYZI I abodefghi jk parstuvwxyzt 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 102 i Service Guide ML380 OKIDATA Chapter 4 Failure amp Repair Analysis 4 8 04 Serial Interface Loopback Test General Information This test isolates the printer from the computer and monitors the operation of the serial interface In order to run this test the serial interface board must be installed with a serial loopback test connector attached to it Refer to the diagram in the next section for the connector configuration 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 103 r an Service Guide ML380 OKIDATA Chapter 4 Failure amp Repair Analysis Loopback Connector Configuration Diagram 1 Jumper the following pins together Pin 2 to Pin 3 Pin 4 to Pin 5 Pin 8 to
34. Ready Busy X ON X OFF NOTE When the serial interface module is installed the printer s parallel interface connector is NOT accessible 1 6 10 Line Feed Increments Fixed 6 lines per inch lpi 0 167 inch 4 23 millimeters 8 lines per inch lpi 0 125 inch 3 175 millimeters Variable n 60 inch n 180 inch 1 6 11 Line Feed Time 2 2 inches per second 1 6 12 Menu Mode Print Prints the entire menu Group Selects Group Function Item Selects Item Set Selects Item Value Exit Exits Menu Mode Enters Select 1 6 13 Paper Feed Methods Standard Friction Feed Top Push Tractor Rear Optional Pull Tractor Bottom Rear Single Bin Cut Sheet Feeder Top CSF 3800 1 6 14 Paper Feed Paths Top Feed Standard Rear Feed Standard Bottom Feed by using an Optional feed mechanism Special Features Paper Park Semi Automatic Sheet Feeding Paper Tear Off 1 6 15 Paper Loading Semi Automatic Sheet Feeding Opening the paper bail arm activates the semi automatic sheet feeder SASF 1 6 16 Paper Out Detection Distance from end of paper Rear Feed 2 3 inches 57 millimeters Bottom Feed 1 4 inches 36 millimeters Top Feed 1 inch 25 mm 1 6 17 Paper Tear Capabilities Paper Tear Off sharp edge on access cover 1 6 18 Print Method Printhead Type General Information Impact Dot Matrix 24 pin printhead 0079 inch 20 millimeter diameter pins Overheat Protection When printhead temperatur
35. S Remove connector CN9 Is 28 VAC output between pins 1 and 2 on CN9 Is 9 VAC output between pins 3 and 4 on CN9 NO Replace the transformer assembly YES Replace the control board End of 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 Page 95 r an Service Guide ML380 OKIDATA Chapter 4 Failure amp Repair Analysis RAP 02 Space Operation Does Not Operate Normally START Is the carriage assembly movement erratic or is the carriage jammed YES Check around the carriage assembly space belt space motor and space rack for any obstructions or mechanical problems Check ribbon drive mechanism for smooth operation NO Are 5V and 35V on the control board Refer to Appendix A of this Service Handbook NO Go to RAP 01 Item A YES Is the connector CN8 on the control board connected properly NO Connect it properly YES Replace the control board Is condition corrected YES End of procedure NO Replace the space motor End of 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 Page 96 OKIDATA Service Guide ML380 Chapter 4 Failure amp Repair Analysis RAP 03 Wrong Character or Missing Dots START Are conn
36. SU FN Chapter 4 Failure amp Repair Analysis 4 9 06 Head Cable Connection v ji ile 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 116 OKIDATA kranai A 1 OVERVIEW A 1 01 General Information This section describes the characteristics of the printed circuit boards used in the printer The following areas are covered Firmware Fuses Jumpers Sensors Switches Test Points Where an item is not applicable the word NONE will be listed 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 117 OKIDATA CGaupter A Board Diagrama A 2 INDEX TO CHARTS Description Board Designation Section Main Control Board Original UMMB A 2 01 Main Control Board Current UMMB A 2 02 RS 232C Serial Module UMRS A 2 03 Modifications to Main Control Board UMMB There are two types of UMMB boards that you might encounter when servicing the Microline 380 printer Summary UMMB Original Board The original board refer to A 2 01 contains the following PROM ROM combination Q2 contains a 256 K or a 512 K PROM in a socket This PROM contains the printer control firmware Q3 is a character generator ROM which is soldered to the p
37. These codes will override panel or menu settings Check your word processors manual to see if you can customize the initialization string If SO remove any codes that interfere with your printers settings The I Prime signal is sent over the parallel interface and will automatically override any settings you have made using the front panel buttons To eliminate this problem go into the Menu Select Mode and change the I Prime item to INVALID This will cause the printer to ignore the I Prime Signal 6 The FONT and PITCH buttons wont work The Operator Panel Functions item in the Printer Menu can be used to disable these buttons If the printer is part of a customized system or if it is used by a number of people the system manager may have used this option to make sure the printer is always set properly 7 None of the lights in the FONT indicator on the front panel are lit The lights in the FONT indicator on the front panel all go out when the printer is operating in the utility mode The lights will come on again as soon as you select an LQ font 8 You need to check the data sent by the computer to the printer Use the hexadecimal dump mode To enter this mode hold the SELECT and TOF PARK buttons down while powering ON the printer All data sent to the printer including text and printer commands will print in both hexadecimal and ASCII format In the ASCII format all non printable codes will be represented by a period To return to n
38. amp Disassembly 3 6 SHIPPING INSTRUCTIONS 3 6 01 Return for Service CAUTION When shipping the printer use the original packaging to prevent damage Be sure to secure the printhead so it will not move during shipment 1 Locate the original packaging or order replacement packaging from Okidata Refer to Appendix B 2 Make sure the printhead is secured so it will not move during shipment 3 Remove the platen knob Be sure to place it in the shipping container 4 Pack the unit using the materials from Step 1 3 6 02 All Other Returns CAUTION The product MUST be returned in the original packaging The product MUST be returned with ALL originally supplied factory items Be sure to secure the printhead so it will not move during shipment 1 Locate the original packaging or order replacement packaging from Okidata Refer to Appendix B 2 Locate the originally supplied factory items Refer to Setting Up in the Printer Handbook 3 Make sure the printhead is secured so it will not move during shipment 4 Pack the unit using the materials from Step 1 Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BP X for any updates to this material http bpx okidata com Page 77 OKIDATA Service Guide ML380 7 i Chapter 4 Failure amp Repair Analysis 4 1 OVERVIEW 4 1 01 Introduction This section is used to isolate problems to the assembl
39. anel 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 44 DATA Service Guide ML380 OKI ER Chapter 3 Maintenance amp Disassembly 3 2 10 Line Feed Motor 1 Perform these procedures 3 2 01 7 and 3 2 02 2 Use a screwdriver to open the lock levers 1 in the directions of arrows A and B and push the bracket 2 of the line feed motor 3 in the direction of arrow C 3 Pull the line feed motor out of the guide holes 4 in the direction of arrow D NOTE After installation check that the platen gear 5 engages firmly and rotates smoothly P N 56507801 Motor Line Feed RSPL B 2 04 j 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 45 Pw DATA Service Guide ML380 OK a Chapter 3 Maintenance amp Disassembly 3 2 11 Photosensor Assembly Paper End 1 Perform these procedures 3 2 0154 3 2 02 and 3 2 1043 2 Pull the paper end sensor 1 from the sensor guide 2 P N 56106901 Photosensor Assembly RSPL B 2 04 Paper End 2 Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material htt
40. aper moves the continuous sheet paper end lever to A1 and the sensor is switched ON When out of continuous sheet paper the paper end lever moves to position B1 and the sensor is switched OFF indicating a paper end condition Bottom Feed Paper End When paper is installed it moves the bottom paper end lever to position A2 and the sensor is switched ON When a paper out condition exists the bottom paper end lever moves to position B2 and the sensor is switched OFF indicating a paper end condition Cut Sheet Paper End When cut sheet paper is installed the paper moves the cut sheet paper end lever to position A3 and the sensor is ON At the end of printing the cut sheet paper end lever moves to position B3 and the sensor is switched OFF indicating a paper end condition Platen Eutiha end lewer r Cantinueus papers Paper end sensor end lever Botiom Paper end leer 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 OKIDATA Service Guide ML380 a Fa Chapter 2 Principles of Operation 2 2 06 Semi Automatic Sheet Feeder SASF The Semi Automatic Sheet Feeder SASF is used to automatically set the print start position when using cut sheet or continuous sheet paper The procedure is as follows Cut Sheet SASF 1 Push the paper release lev
41. as the ribbon been replaced as recommended 4 Has the ribbon been installed properly 5 Is an Okidata ribbon being used 6 Is the printhead gap correctly set 7 Is the firmware the latest current revision 8 Are the printer drivers being used correct for the printer 9 Is the printer driver being used the latest current release 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 85 OKIDATA Service Guide ML380 e RJ Chapter 4 Failure amp Repair Analysis 4 4 02 Problem Categories There are three categories of problems that you might encounter when servicing the printer SELECT Lamp Blinks Fatal Errors The following can cause the SELECT lamp to blink Open Bail Arm Jammed Paper Printhead Cannot Move Other Fatal Error When the SELECT Lamp is blinking check the items listed below 1 Close the bail arm 2 Check for a paper jam 3 Verify that the printhead moves freely 4 Record the status of the POWER SELECT Font Indicators and Pitch Indicator Lamps 5 Refer to the Fault Alarms Tables Section 4 6 6 Locate the error 7 Perform the designated corrective action Operational Errors An Operational Error is usually not accompanied by a fault alarm indication Refer to the Start Here Flowchart Section 4 4 03 and perform the corrective action SELECT Lam
42. ation Position the tab 12 of the paper chute firmly with the groove 13 of the main frame Engage the cut sheet paper end lever 14 attached to bottom of paper chute to the bottom paper end lever 15 under the main frame and install the paper chute The Kit ldler Change Gear ML300 includes the change and idler gears Order this kit when replacing these parts P N 50071701 Chute Paper Assembly RSPL B 2 05 P N 53511201 Lever Release RSPL B 2 05 P N 51219101 Gear Change RSPL B 2 05 4 P N 50915101 Spring Change Gear RSPL B 2 05 P N 58227501 Kit Idler Change Gear ML300 RSPL B 2 05 j P N 51216001 Gear Idler B 2 05 P N 53511301 Link Release RSPL B 2 05 7j P N 50071601 Roller Pressure Assembly 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 50 AT A Service Guide ML380 OKIDATA Chapter 3 Maintenance amp Disassembly 3 2 16 Paper Pressure Guide 1 Perform these procedures 3 2 01 7 3 2 02 7 3 2 03 7 and 3 2 05 7 2 Working from the underside of the printer mechanism and using a screwdriver detach the connection hole section 1 from the projection 2 of the main frame 3 Begin at point A and end at point B 3 Remove the paper pressure guide 4 NOTE On installation be sure to install the projections and guide plate
43. ble for for additional additional information information Internal Fault Alarm Conditions Table LED s Lighted Error Condition Recommended Action Courier 10 Memory Error MPU Internal RAM Replace the main Error control board Prestige 10 Memory Error Program ROM Error Replace the main control board Prestige 20 Memory Error EEPROM Error Replace the main control board Roman 10 Memory Error External RAM Error Replace the main control board Prestige 15 Memory Error Resident Character Replace the main Generator Error control board Prestige Roman 10 Memory Error Resident Character Replace the main Generator control board Courier Prestige 10 Spacing Error Head Homing Error 1 Check for binding by manually moving the carriage assembly 2 Replace the space motor 3 Replace the main control board Courier Prestige 20 Spacing Error Spacing Error Refer to RAP 02 Courier Prestige 15 Printhead Error Thermistor Open Error Replace the printhead Replace the main control board Courier 20 Serial Interface Serial Interface Replace the serial Error ROM RAM Error interface module The POW LED will be turned ON and the SELECT LED will be flashing 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 92 c Service Guide ML380 OKIDATA Chapter 4 Failure amp Repair Analysis
44. ce Guide ML380 ert Chapter B Illustrated Parts Listing B 2 08 Consumables Part numbers are subject to change Refer to Okilink II for current part numbers and pricing information Okidata P N Description Comments Disassembly Oki J P N Refer to B 1 02 Procedure 1 52104001 Ribbon Consumable 3 2 02 N A Cartridge 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 133 OKIDATA Service Guide ML380 r a E Chapter B Illustrated Parts Listing B 2 09 Packaging Part numbers are subject to change Refer to Okilink II for current part numbers and pricing information 2 3 Mot Shown Mot Shown Okidata P N Description Comments Disassembly Oki J P N Refer to B 1 02 Procedure 53506702 Box Graphic N N A Microline 380 2 53529702 Foam End Cap N A N A Left 3 53529701 Foam End Cap N A N A Right 4 N A Bag Printer N A N A 5 N A Bag Accessories N A N 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 Page 134 OKIDATA Service Guide ML380 r a E Chapter B Illustrated Parts Listing B 2 10 Documentation Part numbers are subject to change Refer to Okilink II for current part numbers and pricing information Okidata P N Des
45. center guide 15 the left pin tractor assembly 16 and the right pin tractor assembly 17 from the two shafts 4 and 8 NOTES Marks A 18 and B 19 of the left 20 and right pin tractors 21 must be aligned when installed Install the left pin tractor assembly to the left of the stopper on the lower cover This limits movement and correctly positions the paper against the paper end sensor P N 50071901 Tractor Pin L Assembly RSPL B 2 06 P N 51216101 Gear Tractor RSPL B 2 05 4 P N 51003901 Guide Center RSPL B 2 06 P N 50071801 Tractor Pin R Assembly RSPL B 2 06 P N 51109503 Shaft Drive RSPL B 2 06 j P N 51110601 Shaft Lock RSPL B 2 06 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 DATA Service Guide ML380 OKI p Chapter 3 Maintenance amp Disassembly 3 2 18 Microswitch Assembly SASF 1 Perform these procedures 3 2 01 and 3 2 0343 2 The microswitch assembly 1 is fastened to the frame on two pins The first pin 2 is part of the switch The second pin 3 is part of the printer mechanism The first pin must be released before the switch will pivot on the second pin 3 To release the first pin use an opened paper clip to push the pin out of the hole Access the hole from the inside of the printer frame Then pivot the switch on
46. cription Comments Disassembly Oki J P N Refer to B 1 02 Procedure 1 58217701 Kit ML380 Service Document N A N A Training 58217702 Kit ML380 Service Document N A Training 58217703 Kit ML380 Service Document N A Training 58232301 Package User s a Inc 3 45 N A Documentation 52033001 Card QA Reply Document Part of 2 N A 4 53436029 Bag Poly 9 x 12 Document Part of 2 N A 5 58052101 Guide Customer Document Part of 2 N A N A Service 59235901 Handbook Printer Document Part of 2 N A N A 59235902 Handbook Printer Document Part of 2 N A N A 59235903 Handbook Printer Document Part of 2 N A N A 7 59236401 Manual Document N A N A Maintenance 59236501 Manual Document N A N A Troubleshooting 59238401 Manual Document N A Maintenance CSF 3800 10 58054901 Product Document N A N A Specifications 11 59239101 Product Document N A Specifications ML380 Serial Interface 12 59239001 Product Document N A Specifications ML380 CSF 3800 To order Marketing Literature complete an Okidata Marketing Literature Order Form Fax the completed form to Okidata Marketing Communications Obtain this form by faxing a request to Okidata Marketing Communications Refer to the Service Center Reference Guide for information on contacting Okidata i P N Description Comments Disassembly m P N Refer to B 1 02 Procedure 13 N A Okidata Service Document N A N A Center Reference Guide 53547501 Okidata Support Document
47. d hold the TOF PARK button while powering ON the printer 4 The test will print 5 To stop the test press SELECT Sample HL3B8Q EPS A F W 80 37 YR4077 1262 RES e1 08 R4084 1035 I 45155 01234567891 32 BABCDEFGHIIKLMROPORSTUVWEYZ _ m I 546 175 7 01234567891 lt gt BABCDEFCHIJKLMNOPQRSTUVWXYZ 4 ihe erin egi ESVE 0123456789 e BABCDEFGHIJKLHNOPQRSTUVWXYZ N abcdefghijklanopg 351 amp 0123458783 lt gt BABCDEFGHIJKLHNOPQRSTUVWXYZ A abcdefghijkimnopqr 1 amp 812345657891 lt gt BABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrs 1 amp 0123456789 lt gt BABCDEFGHIJKLHNOPQRSTUVWXYZ X abcdefghijklmnopqrst amp 0123456789 27 PABCDEFGHIJKLHNOPQRSTUVWXYZ A abcdefghijklmnopqrstu Bod 3m boh do dE Ee Ro m oem 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 101 OKID AT A Service Guide ML380 aif Chapter 4 Failure amp Repair Analysis 4 8 03 Font Test General Information The Font Test gives samples of the various fonts and sizes available with the Microline 380 printer Header At the top of the test is a header This header provides the following information printer model 1 emulation 2 version 3 firmware revision number 4 firmware part number 5 character g
48. data products and services Technical Service Bulletins Recommended Spare Parts Lists Printer Drivers Product Specifications and Service Training Information are also available Refer to the Service Center Reference Guide for information on accessing Okilink Il 4 3 03 Faxable Facts Okidata s Faxable Facts is an automated fax document retrieval system It is maintained by Okidata s Customer Information Center Answers to common questions about Okidata products are available through Faxable Facts Refer to the Service Center Reference Guide for information on accessing Faxable Facts 4 3 04 Technical Service Bulletins Okidata s Technical Service Bulletins TSB s contain technical information developed after product release Firmware updates part number changes and procedural changes are some of the subjects covered by these bulletins The TSB s are distributed through Okilink II Refer to the Service Center Reference Guide for information on accessing Okilink Il 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 an Service Guide ML380 OKIDATA Chapter 4 Failure amp Repair Analysis 4 4 TROUBLESHOOTING TIPS 4 4 01 Preliminary Checks 1 Is the product being operated under the proper ambient conditions 2 Does the paper being used meet the specifications for this product 3 H
49. e OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 100 OKID AT A Service Guide ML380 aif Chapter 4 Failure amp Repair Analysis 4 8 02 Rolling ASCII Test General Information The Rolling ASCII Test gives a continuous sample of the default print style The rolling ASCII test is a continuous printout of all 96 ASCII characters This is an excellent way to check print quality across and down an entire page Use this test to check the following items 1 Print Quality Across the entire length of a line Down the entire page 2 Line Spacing 3 Left Margin Alignment Header At the top of the test is a header This header provides the following information printer model 1 emulation 2 version 3 firmware revision number 4 firmware part number 5 character generator revision number 6 and character generator part number 7 ML380 EPS A F W 03 01 YR4077 xxxx RES 01 00 YR4084 xxxx CAUTION Before running this test make sure that continuous feed paper is loaded Running the test without paper loaded or having the wrong width paper loaded will allow the printhead to print on the platen This will dirty the platen cause excessive wear on the ribbon and may damage the platen ribbon and printhead 1 2 3 4 5 76 Procedure Follow these steps to print the Rolling ASCII Test 1 Load continuous feed paper into the printer 2 Power OFF the printer 3 Press an
50. e is between 90 and 129 degrees Celsius ALARM 1 the printer stops bi directional printing Uni directional printing begins If the temperature continues to rise 130 degrees Celsius ALARM 2 printing stops Printing will resume when the printhead temperature drops below the ALARM 1 threshold NOTE Refer to Section Two for more information on printhead operation Printhead Gap Information Two items factor into printhead gap information 1 Printhead Gap Adjustment This is a SERVICE ADJUSTMENT made by a technician It is covered in Section 3 3 of this Service Handbook The Adjustment measures 0 016 0 002 inches 0 41 0 05 mm 2 Printhead Gap Adjust The printhead gap is modified by moving the printhead gap lever located on the left side of the housing To move the lever pull it towards the printer housing and push the lever towards the front of the printer The settings are 1 2 3 4 and 5 Use 1 for single sheet Use 2 for multiple sheets or forms thickness 2 sheets Use 3 for multiple sheets or forms thickness 3 sheets Use 4 for multiple sheets or forms thickness 4 sheets Use 5 for envelopes and extra thick paper 1 6 19 Print Modes Letter Quality Utility 1 6 20 Print Speed Print Character Mode Pitch Utility 150 cps 180 cps 112 5 cps 128 25 cps 150 cps Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any update
51. e of the space rack from the guide pin 6 and lift the space rack 7 Remove the C side of the space rack from guide pin 7 and remove the space rack NOTE Perform the printhead gap adjustment procedure after installing this part Refer to Section 3 3 of this Service Handbook P N 53510801 Rack Space RSPL B 2 04 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 opx okidata com Page 39 3 A AC Service Guide ML380 OKIDATA Chapter 3 Maintenance amp Disassembly 3 2 05 Ribbon Feed Gear Assembly 1 Perform this procedure 3 2 02 lt 2 Release the four claws 1 3 Insert a screwdriver into the grooves 2 and pry the claws away from the carriage plate 3 4 Lift the ribbon feed gear assembly 4 in the direction of arrow A Slide it in the direction of Arrow B and remove it P N 50071501 Gear Ribbon Feed Assembly RSPL B 2 06 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 ML380 Chapter 3 Maintenance amp Disassembly 3 2 06 Mini Pitch Space Belt 1 Perform these procedures 3 2 02 and 3 2 05 4 2 Use pliers to remove the belt tension spring 1 3 Loosen the screw 2 4 Remov
52. e paper up press and hold TOF PARK and press FEED To move the paper down press and hold TOF PARK and press FONT This moves the paper in increments of 1 180 of an inch 4 Press TOF PARK to store the top of form position in memory 5 Press the SELECT button to select the printer The SELECT lamp will light Rear Feed with Pull Tractor 1 Load paper into the printer 2 Press the SELECT button to deselect the printer The SELECT lamp will go out 3 Rotate the platen knob to move the paper to the desired position 4 Press TOF PARK to store the top of form position in memory 5 Press the SELECT button to select the printer The SELECT lamp will light Bottom Feed 1 Load paper into the printer 2 Press the SELECT button to deselect the printer The SELECT lamp will go out 3 Rotate the platen knob to move the paper to the desired position 4 Press TOF PARK to store the top of form position in memory 5 Press the SELECT button to select the printer The SELECT lamp 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 opx okidata com Page 71 ai DATA Service Guide ML380 OKI PI Chapter 3 Maintenance amp Disassembly 3 3 07 Paper Park General Information Paper park allows you to switch from continuous feed paper to single sheet paper without removing the continuous feed paper from the prin
53. e 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 printed circuit boards directly on conductive surfaces 10 Follow the recommended procedures when replacing assemblies and units 11 Perform the printhead gap adjustment procedure when any of the following occur Refer to Section 3 3 of this Service Handbook i Print Quality is darker on one side of the document Parts are replaced Printhead 3 2 02 7 Space Rack 3 2 04 Carriage Frame 3 2 13 7 12 Perform the space belt tension adjustment procedure when the following parts are installed Refer to Section 3 3 of this Service Handbook Space Belt 3 2 06 7 Space Motor Assembly 3 2 22 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 Pw DATA Service Guide ML380 OKI TER Chapter 3 Maintenance amp Disassembly 3 2 DISASSEMBLY ASSEMBLY PROCEDURES General Information This section contains the printer disassembly procedures Only the
54. e replaced Space Belt 3 2 06 i Space Motor Assembly 3 2 22 Procedure 1 Slightly loosen the screw of the idle pulley DO NOT remove the screw 2 Manually slide the carriage assembly back and forth across the entire length of the platen 3 Tighten the screw Space belt Idle pulley bracket Idle pulley u o UND SN Screw Spring 3 3 03 pox 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 an Service Guide ML380 OKIDATA Chapter 3 Maintenance amp Disassembly 3 3 04 Key Combinations FONT PITCH While ON LINE Enter Menu Mode While ON LINE FONT Hold during Power ON Enter Menu Mode From Power OFF Access Menu if Menu set to LIMITED OPERATION SEL FEED Hold during Reset Menu to Factory Defaults Power ON TOF s PARK Hold during Activate Rolling ASCII Test Power ON FEED Hold during Power ON Activate Font Test GEL IOF PARK Hold during Activate Hexadecimal Dump Test Power 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 62 ai DATA Service Guide ML380 OKI PI Chapter 3 Maintenance amp Disassembly 3 3 05 Menu Operation Menu Select Mode N
55. e the belt 3 from the idle pulley 4 5 Remove the head connector assembly 5 from the carriage plate 6 6 Remove the carriage plate 7 Detach the belt from the space motor assembly gear 7 8 Remove the belt clamp 8 mounted to bottom of the carriage plate 9 Use a screwdriver to push the claw of the belt clamp in the direction of arrow A Then remove the belt clamp and belt by lowering the claw in the direction of arrow B NOTE Perform the space belt tension adjustment procedure after installing this part Refer to Section 3 3 of this Service Handbook P N 50904801 Spring Coil RSPL B 2 04 P N 51304001 Belt Mini Pitch Space Belt RSPL B 2 06 5 P N N A Screw Self Tapping B 2 04 P N 51004001 Slider RSPL B 2 06 P N 51219201 Pulley Idle RSPL B 2 04 P N 53330401 Plate Carriage RSPL B 2 06 P N 50704701 Clamp Belt RSPL B 2 06 P N 53330301 Bracket Idle Pulley RSPL B 2 04 j 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 f i Service Guide ML380 OKIDATA Chapter 3 Maintenance amp Disassembly 3 2 07 Head Connector Assembly 1 Perform these procedures 3 2 01 7 3 2 02 3 2 03 3 2 05 7 and 3 2 06 2 Remove the two head cables 1 from the connectors 2 on the control board When cable clamp 3 is lifted the head cables
56. ectors CN6 and CN7 on the control board connected properly NO Connect them properly YES Is the head cable inserted into the printhead connector correctly NO Seat the head cable to the printhead connector correctly YES Replace the printhead Is condition corrected YES End of procedure NO Replace the control board Is condition corrected YES End of procedure NO Replace the head cable End of 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 Page 97 an Service Guide ML380 OKIDATA Chapter 4 Failure amp Repair Analysis RAP 04 Line Feed Trouble START Rotate the platen knob Does the platen rotate smoothly NO Ensure no foreign matter or dust is present on the platen gear or line feed motor gear Check for smooth meshing of the platen gear and line feed motor gear Ensure correct operation of the push tractor assemblies both right and left and the tractor drive gears YES Is connector CN4 on the control board connected properly NO Connect it properly YES Is fuse F1 on the control board open YES Replace fuse NO Replace the line feed motor End of 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 opx okidata com Page 9
57. eleases the platen assembly 2 from the main frame 3 3 Lift the A side of the platen assembly until the B side clears the release lever 4 NOTES After installation check that the platen gear engages firmly with the line feed motor gear and that the platen rotates smoothly Set the release lever to OPEN front and check that the groove 5 of the paper chute firmly engages with the groove 6 of the main frame Then lock the platen assembly P N 50061305 Platen Assembly 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 49 te Service Guide ML380 OKIDATA Chapter 3 Maintenance amp Disassembly 3 2 15 Pressure Roller Assembly 1 Perform these procedures 3 2 01 7 3 2 03 and 3 2 14 7 2 Remove the paper chute 1 Be careful not to damage the grounding strap 3 Open the claw 2 and remove the paper release lever 3 4 Remove the change gear 4 and the spring 5 5 Remove the idle gear 6 6 Remove the boss 7 from the guide hole 8 of the main frame 9 and remove the release link 10 7 Pull part A of the pressure roller assembly shaft 11 out of the main frame in the direction of arrow B 8 Pull the C part of the pressure roller assembly shaft out of the main frame in the direction of arrow D 9 Remove the shaft NOTES Install
58. enerator revision number 6 and character generator part number 7 ML380 EPS A F W 03 01 YR4077 xxxx RES 01 00 YR4084 xxxx CAUTION Running the test without paper loaded will allow the printhead to print on the platen This will dirty the platen cause excessive wear of the ribbon and may damage the platen ribbon and printhead Procedure 1 Load continuous feed paper into the printer 2 Power OFF the printer 3 Press and hold the FEED button while powering ON the printer 4 The test will print This test is two pages long 5 When the test has finished printing the SELECT lamp will light To stop printing the test before it is complete follow these steps 1 Press the SELECT button 2 The printer will finish printing the current line 3 The printer will perform a line feed and a carriage return 12345 76 Sample EFS Fea ead YRAhBa 147 RES 1 20 TE4O004 1277 Lg COURIER i CPI l adt amp 1 EELIAASETOUSrx T ARTDBFGHIJELHHCFQRATUUHZYEZ s absdefgk pqrEetuvwreyri 48 1345 4 BL213456 709 pte BADCDEFGEIJKLHH FOQRO TZVHAXT mXhcdafsghiiklmnnpqrmstuwwrzyri Pee CTs SLM Ts za THARCTEFGHI RE5TTYMXTZ X absdafghiijklunopqratuveryr ll Lj EGHAM 18 CFI a Ce PL SSA a Lc TRAEICDETGHI JKLMBOPRESTUVWEYZDS ahcdeTgt pqrzriuvwzrzyr Pa C4 PRA TA pee TARP FELMNOTTZ IRSTUVE A zxhcdsTgbki kimnapqrriusmrpzi b LR eo PL ESR ee TRACE 1 HBTUVERITZILI abrcdzd ghti kimmopqratu
59. er to the cut sheet side rear of printer 2 Insert the paper from behind the platen 3 Open the paper bail arm pull toward the front of the printer This activates the SASF switch 4 Line feed operation will feed the paper 2 76 inches If the paper does not move the SASF motion becomes invalid and is treated like an ordinary paper end 5 Once the paper bail arm is closed a reverse line feed of about 0 18 inches is performed This moves the paper to the print start position Continuous Sheet Rear Feed SASF 1 Push the paper release lever to the continuous sheet side front of the printer 2 Insert the paper into the push tractor 3 Open the paper bail arm pull toward the front of the printer This activates the SASF switch 4 Line feed operation will feed the paper 3 6 inches If the paper does not move within 2 4 inches of motion the SASF motion becomes invalid and this is treated like an ordinary paper end 5 Once the paper bail arm is closed a reverse line feed of about 0 18 inches is performed This moves the paper to the print start position Bail arm Bail arm OPEN CLOSE V V SASF Paper detection PE LF motion Reverse LF of about 0 18 LF of about 2 76 inches neh Performs a LF until paper end 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 OKIDATA S
60. ervice Guide ML380 Ww Chapter 2 Principles of Operation 2 2 07 Paper Park Paper park operates as follows 1 Press PAPER PARK 2 Reverse line feed retracts the paper until a PAPER END condition exists Or 14 inches of paper have been fed 3 When the PAPER END condition exists the printer retracts 0 49 inches of paper The paper is still installed on the push tractor but cut sheet paper may now be fed PARK Paper end detection V B E T 2277 LF mation Me ALE PHP SA MN MS i YIS L Reverse LF of about 6 49 inch Reverse LF until paper and or 14 inches max 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 31 OKID AT A Service Guide ML380 Chapter 3 Maintenance amp Disassembly 3 1 OVERVIEW 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 printer 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 consumable or parts are replaced Failure to perform these procedures could result in unnecessary service calls Pr
61. es to this material http bpx okidata com OKIDATA Serial Interface Signal Requirements Connected to the printer frame 7 8 to 10 11 12 to 19 20 21 to 25 Protective Ground PG Ground Transmit Data TD From Printer Receive Data To Printer From Printer Request to Send Not Used Data Set Ready To Printer Signal Ground Ground Not Used SSD From Printer Supervisory Send Data Not Used DTR From Printer Data Terminal Ready me Page 106 Service Guide ML380 Chapter 4 Failure amp Repair Analysis Serial data transmitted to the system Serial data received by the printer Always set to low mark Indicates that data can be sent Ground Indicates that the printer is not ready to receive data Indicates that the printer is not 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 107 OKIDATA Service Guide ML380 Chapter 4 Failure amp Repair Analysis Commonly Used Serial Cable Configurations IBM 25 Pin Cable Configuration Computer Printer Computer Printer 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 108 OKIDATA Service Guide ML3
62. essor operates by execution of this program RAM Q4 The RAM stores received data to be printed 32 Kbytes CGROM Q3 1 MBit ROM which stores the resident character fonts EEPROM Q18 This 256 bit serial Electrically Erasable and Programmable ROM stores the Menu Mode data LSI Q7 LC92018B 283 This LSI switches the phase of the space motor and generates the timing of print dots for each print density The LSI performs the following functions Space Pulse Motor Control To obtain the carriage speed instructed by the microprocessor the LSI generates the pulse switch timing and overdrive time Dot Timing generation Parallel Interface Control LF Motor Control LED Drive General Purpose Input Port Used to read Operator Board Switches LSI Q6 LC92011B 284 This LSI drives the 24 pin printhead and controls memory The following describes the function of the LSI Printhead Drive Control Head Pin Counting Function Counts the number of printwires to be driven then changes the duration of the HD ON signal accordingly Memory Control Extends the addressable memory by switching banks in out LED Drive Output Port Microline 380 Block Diagram HCHWEg PSO SWITCH Fi Se eo sai ie i tes PUES Sag DWiTZas acri Cperano Fang Curuit ee K perih ged LE BSC St i PAREA EHD T NEDH 11 Iu PARALLEL INTERFACE EPALE MTOR LNE FEET ARITHA L al 1 i i i i 7 i i i i
63. f the printer 3 Push the paper separator 3 at location A and release it from the platen shaft 4 4 Lift the paper separator to detach the guide pins 5 from the printer mechanism 6 P N N A AC Cable B 2 03 P N 53511401 Separator Paper 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 36 PN D AT A Service Guide ML380 OK rere Chapter 3 Maintenance amp Disassembly 3 2 02 Printhead 1 Move the bail lever 1 to back of the printer 2 Remove the ribbon cartridge 2 3 Grasp the tab of the head clamp 3 lift up and swing it 90 in the direction of Arrow A to unlock the printhead 4 4 Lift the printhead from the carriage frame 5 NOTE Perform the printhead gap adjustment procedure after installing this part Refer to Section 3 3 of this Service Handbook P N 52104001 Ribbon Cartridge Consumable B 2 08 P N 50079301 Printhead 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 37 OKID AT A Service Guide ML380 Chapter 3 Maintenance amp Disassembly 3 2 03 Upper Cover Assembly 1 Perform this procedure 3 2 01 7 2 Remove the platen knob 1 3 Raise the sheet sepa
64. hrough LFMO Phase 4 establish the proper phase relationship for driving the motor LECHE 1 LFO t Lo Ld L we Lief Lot UL Ss LFA Lco rd 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 21 OKIDATA Service Guide ML380 P Chapter 2 Principles of Operation 2 1 08 Alarm Circuits Fault Alarm Circuit in Power Supply Unit This protective circuit causes the AC fuse to open when a fault occurs in the printhead drive circuit or line feed drive circuit thus preventing 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 time the appropriate signal HEAD ALM LF ALM1 or LF ALM2 will be sent to the fault alarm circuit The fault alarm circuit generates the ALM signal high which switches on an SCR This causes the secondary coil 40 volts of the main transformer to short circuit causing an overcurrent to flow through the primary coil and open the AC fuse 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 Whenever printing the printhead temperature increases If the head temperature
65. ide Okidata s Faxable Facts is an automated fax document retrieval system Part numbers and pricing are available through Faxable Facts For instructions on accessing Faxable Facts refer to the Service Center Reference Guide Okidata s Technical Information Group is a telephone support line reserved for Authorized Dealers Part numbers and pricing are available through Technical Information For instructions on accessing Technical Information refer to the Service Center Reference Guide REMEMBER Current part numbers recommended stocking levels and pricing information are available through Okilink Il Faxable Facts and Technical Information Refer to the Service Center Reference Guide for information on accessing these resources 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 122 OKIDATA Service Guide ML380 P Chapter B Illustrated Parts Listing B 1 02 Definition of Terms Assemblies Assemblies are parts grouped under a single description and or part number Generally individual items in an assembly are not available from Okidata Assemblies are surrounded by broken line boxes in the diagrams Assemblies will say Includes xx xx under the Comments section of the tables Parts in assemblies will say Part of xx under the Comments section of the tables Blank Okidata does n
66. iness Partner Exchange BPX for any updates to this material http bpx okidata com Page 91 OKIDATA Service Guide ML380 lc Chapter 4 Failure amp Repair Analysis 4 6 02 Fault Alarm Lamp Display When the printer detects an alarm condition the LED s are used to display the status of the alarm The following tables show the alarm status conditions Printer Mode Display Table SELEC Printer Mode Definition Hecommended Action T LED ON Normal Operation ON LINE Printer is ready to Normal Operation Mode receive data and print Normal Operation Hex Printer is in HEX Dump Normal Operation Mode Dump Mode OFF Normal Operation OFF LINE Printer is in Local Mode Normal Operation Mode and will not accept data Normal Operation Menu Printer is in Menu Mode Normal Operation Mode see Printer Handbook Slow Operator Alarm Paper en Out of paper condition Load Paper If paper is Blink Condition d installed check for jam Operator Alarm Paper SASF Tractor Paper is Clear jam If no jam Condition Jam jammed exists check replace the sensor Operator Alarm CSF Paper is jammed when Clear jam If no jam Condition Paper the Cut Sheet Feeder is exists check replace Jam installed the sensor Operator Alarm Print Printer has received a Normal Operation Condition Suppress Stop Printing command from the Host Computer Internal Fault See Internal Fault See Internal Fault Alarm Alarm Alarm Conditions Table Conditions Ta
67. ision 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 rA Service Guide ML380 OKIDATA Chapter 3 Maintenance amp Disassembly 3 3 06 Top of Form General Information Top of Form is the distance from the top edge of the paper to the first print position on the page the highest vertical position on the page where the first line of printing will appear When setting the top of form use the lower red line on the ribbon protector as a guideline The red line shows the baseline of the current printing position The Top of Form may be set for each of the paper paths Cut Sheet single sheet Rear Feed Rear Feed With Pull Tractor Bottom Feed Cut Sheet Single Sheet 1 Load paper into the printer 2 Press the SELECT button to deselect the printer The SELECT lamp will go out 3 To move the paper do either of the following To move the paper up press and hold TOF PARK and press FEED To move the paper down press and hold TOF PARK and press FONT This moves the paper in increments of 1 180 of an inch 4 Press TOF PARK to store the top of form position in memory 5 Press the SELECT button to select the printer The SELECT lamp will light Rear Feed 1 Load paper into the printer 2 Press the SELECT button to deselect the printer The SELECT lamp will go out 3 To move the paper do either of the following To move th
68. l rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 109 te Service Guide ML380 OKIDATA Chapter 4 Failure amp Repair Analysis 4 9 RESISTANCE CHECKS 4 9 01 General Description The charts on the following pages provide information needed to determine if the printhead and motors used in the printer are defective 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 110 OKID AT A Service Guide ML380 Kw Chapter 4 Failure amp Repair Analysis 4 9 02 Main Control Board UMMB Voltage Check Points rh su 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 111 OKID AT A Service Guide ML380 Chapter 4 Failure amp Repair Analysis 4 9 03 Connectors Block Diagram Head cable 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 112 OKID ATA Service Guide ML380 A d Chapter 4 Failure amp Repair Analysis 4 9 04 Connector Location Copyright 1997 Okidata Division of OKI America Inc All rights rese
69. m p COMMON EH OGD and yer Chik Corea ret ava Toe rm 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 an Service Guide ML380 OKIDATA Chapter 2 Principles of Operation 2 1 06 Spacing Drive Circuit The space motor is driven by a two phase pulse motor The phase signals Phase 1 Phase 2 Phase 3 and Phase 4 and the basic pulse signals are output from the LSI Q7 The pulse signals are modified by the drive voltage compensation circuit and sent back to the LSI Q7 The space overdrive signals Phase 1DVOV Phase 2 DVOV Phase 3DVOV and Phase 4DVOV switch Q16 and Q17 ON setting up the proper phase relationship of analog space motor drive signals SP Phase 1 through SP Phase 4 These signals are then sent to the space motor 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 OKIDATA Service Guide ML380 SU FN Chapter 2 Principles of Operation 2 1 07 Line Feed Circuit The line feed motor shaft is held stationary by 8 vdc the holding current is approximately 30 ma whenever in a stopped position During line feed operation the line feed motor is driven in accordance with the LF OVD signal The signals LFMO Phase 1 t
70. n tractor The tractor is driven by the line 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 Pressure Roller Assembly Friction Feed When the release lever is set to the FRICTION 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 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 NOTE Drive power from the line feed motor is transferred from the platen to the idler gear and then to the change gear Centinwous form O Pull tractor s e t Sheet feeder shaft Drive gear idler gear 5 oe FJ T ER 5 Li c A Platen 4 e UE o E Palen 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 OKIDATA Service Guide ML380 e Chapter 2 Principles of Operation 2 2 05 Paper End Detection Continuous Sheet Paper End When continuous sheet paper is installed the p
71. nalysis 4 2 REPORTING PROBLEMS 4 2 01 General Information Okidata strives to provide accurate and detailed service information through its training materials The Technical Training Group realizes that service technicians have valuable experience knowledge and opinions Okidata strongly encourages you to report any problems you may encounter when using the materials of this training kit Please be as specific and detailed as possible Your comments suggestions and criticisms are used to update and revise training kits You should reference the training materials when servicing Okidata products Most problems can be solved by using the information provided in the training materials If you encounter a situation that cannot be solved please let Okidata know Refer to the Service Center Reference Guide for information on contacting Okidata 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 OKIDATA Service Guide ML380 a fers Chapter 4 Failure amp Repair Analysis 4 2 02 Problem Lists Technicians frequently request a list of common problems specific to a product Technical Training Kits are written before a product is shipped to customers Therefore such information is NOT available when a product is first released However Okidata wants to respond to these requests Okilink II p
72. nter using a 24 pin printhead It emulates the Epson LQ printer A push tractor is standard An optional pull tractor is available Font and Character Pitch selection is available through the operator panel printer menu or through software using control codes A Centronics Parallel interface is standard An RS232 C serial module is available as an option 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 te Service Guide ML380 OKIDATA Chapter 1 Product Specifications 1 2 PHYSICAL SPECIFICATIONS 1 2 01 Dimensions Width 15 67 inches 398 millimeters Depth 4 72 inches 120 millimeters Height 13 58 inches 345 millimeters NOTE Dimensions DO NOT INCLUDE the platen knob acoustic cover and paper separator 1 2 02 Weight 17 9 pounds 8 1 kilograms 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 5 te Service Guide ML380 OKIDATA Chapter 1 Product Specifications 1 3 POWER REQUIREMENTS 1 3 01 Input Power 120 VAC 5 5 15 220 240 VAC 45 5 15 Single phase AC 1 3 02 Power Consumption Operating 90 VA Idle 30 VA 1 3 03 Power Frequency 120 VAC 50 60 Hz 2 220 240 VAC 50 60 Hz 2 Copyright 1997
73. on The printhead gap adjustment should be performed when the following occur 1 Print quality is darker on one side of the document 2 Parts are replaced Printhead 3 2 02 7 Space Rack 3 2 04 7j Carriage Frame 3 2 13 The printhead gap should measure 016 inch 002 inch 0 41 0 05 millimeters Procedure 1 Move the release lever 1 to the open position front 2 Set the printhead gap adjusting lever 2 to range 1 3 Move the carriage to the left side of the platen and rotate the left adjusting collar 3 to obtain the correct gap between the platen and the printhead 4 Move the carriage to the right side of the platen and rotate the right adjusting collar to obtain the correct gap between the platen and the printhead 5 Check the gap setting at the left center and right of the platen When the gap is correct at all positions do the following check 1 Set the adjusting lever to range 5 2 Check the gap setting at the left center and right of the platen It should measure 027 inch 0 002 inch 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 Service Guide ML380 OKIDATA Chapter 3 Maintenance amp Disassembly 3 3 03 Space Belt Tension General Information The space belt tension adjustment should be performed when the following parts ar
74. oper performance of maintenance and cleaning will help to achieve the best possible print quality from the printer 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 DATA Service Guide ML380 OK Chapter 3 Maintenance amp Disassembly 3 1 02 Maintenance Tools The following tools are required to service the printer 2 Phillips Screwdriver with magnetic tip Straight slot Screwdriver Needle Nose Pliers 4 Inch Awl or large opened paper clip Wire Cutters Digital Multimeter Feeler Gauge capable of measuring 014 inches Shop Vacuum Clean soft and lint free Cloth All Purpose Cleaner Contact Kleen Okidata P N 51802301 Platen Cleaner Machine Grease Machine Oil 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 Awd itTe ar AC Service Guide ML380 OKIDATA 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 turn the AC power switch OFF and pull out the AC plug 3 Detach the interface cable if installed 4 Do not remove parts unnecessarily Try to keep disassembly to a minimum 5 Use th
75. or any updates to this material http bpx okidata com Page 8 OKID AT A Service Guide ML380 re Chapter 1 Product Specifications 1 6 OPERATIONAL SPECIFICATIONS 1 6 01 Character Matrix Sizes Table of Print Speed and Character Matrix 63 cps 12 cpi 192 cps 12 cpi 240 cps 15 cpi 1 6 02 Characters Per Line Maximum Characters Per Line Characters Per Inch _ Maximum Characters Per Line Characters Per Inch o e C ee C C e S a 20 1 6 03 Character Pitches 5 6 8 5 10 12 15 17 1 20 characters per inch Characters Per Inch cpi The character pitches are selected through the following methods Operator panel front panel controls Menu Select Mode Menu Mode Control codes in the software Special Microline 380 drivers 1 6 04 Character Sets Standard ASCII EPSON Character Set IBM Character Set and Il Foreign Language Sets 14 Line Graphics Zero Slashed Zero 1 6 05 Emulation Epson LQ 1 6 06 Fonts Letter Quality Courier Letter Gothic Prestige Orator Roman Helvette Draft Utility Special Font Effects Emphasized Enhanced Outline Shadow Double Height Double Width 1 6 07 Front Panel Switches SELECT Exit FEED Group TOF PARK Item FONT Set PITCH Print 1 6 08 Graphics Resolution Graphics Resolution Maximum 180 x 360 dpi Minimum 60 x 72 dpi 1 6 09 Interface Standard Parallel Optional RS232C Serial 19 2 Kbytes Super Speed
76. ormal printing power OFF the printer then power ON 9 Static electricity causes the paper to stick In cold dry weather static charges can build up on continuous feed paper This can make the paper cling to the paper separator If you have this problem during high volume printing jobs try moving the single sheet paper guides on the separator together so that the paper rests on the guides rather than on the separator itself 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 89 OKIDATA Service Guide ML380 lc Chapter 4 Failure amp Repair Analysis 4 5 ABNORMAL OUTPUT 4 5 01 Output Samples Uneven Print Light Print on Density the Entire Page Inconsistent Line Feed omearecd Print Drifting Margin Light Print on the Entire Page Possible Causes 1 Ribbon is dried out Replace the ribbon 2 Verify that the headgap lever setting is appropriate for the type of paper being used 3 Check perform the printhead gap adjustment 4 Paper is not within specification Refer to Section One for paper specification Uneven Print Density Possible Causes 1 Printhead gap not within specification Perform the printhead gap adjustment 2 Defective platen Replace the platen Smeared Print Possible Causes 1 Ribbon protector is missing or broken Replace the ribbon pr
77. ormation on contacting Okidata Placing a Parts Order All authorized Okidata resellers may order spare parts and consumables for Okidata products Orders are placed through Okidata s Logistics Department Please refer to your Service Center Reference Guide for details on ordering parts You should have the following information available before you place your order Okidata Dealer Authorization Number Okidata Customer Number Your Purchase Order Number Okidata Part Number s Use this Appendix Okilink Il Faxable Facts or contact Okidata Technical Support to find the correct part number Refer to the Service Center Reference Guide for information on contacting Okidata 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 124 AUF A Service Guide ML380 OKIDATA Chapter B Illustrated Parts Listing B 2 CHARTS Below is an index to the illustrated parts breakdown charts Description Printer Covers Printer Unit Printer Mechanism 1 of 3 Printer Mechanism 2 of 3 Printer Mechanism 3 of 3 Option Parts Consumables Packaging Documentation Service Training Kit Revisions 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. ot recommend stocking this item This item should be purchased on an As Required Basis only The availability of this item is NOT guaranteed by Okidata Consumable A consumable is a supply item which has a specified life and must be periodically replaced It is purchased and installed by the end user Okidata machines are designed to work exclusively with Okidata consumables By using genuine Okidata consumable products the investment made in the equipment is protected Document A document is a printed item which supports the service and marketing of a product Various documents are available from Okidata Drivers Printer drivers are updated frequently Please refer to Okilink II for the latest printer driver information Firmware Firmware is revised frequently Please refer to Okilink II for the latest firmware information Option An option is a part assembly which is added to a product The option expands the products functionality An option may or may not be installed by the end user Instructions for installation accompany each option Option RSPL Okidata recommends that this part assembly be on hand for servicing installed options RSPL Okidata recommends that this part assembly be on hand for servicing Technical Service Bulletins Technical Service Bulletins TSBs are also referred to as Okidata s monthly mail The TSBs contain the latest information on firmware revisions procedure changes and technical information u
79. otector 2 Verify that the headgap lever setting is appropriate for the type of paper being used 3 Check perform the printhead gap adjustment 4 Paper is not within specification Refer to Section One for paper specification Inconsistent Line Feed Possible Causes 1 Power OFF the printer Turn the platen knob The platen should rotate smoothly If it does not remove the cause of the binding 2 Defective line feed motor Replace the line feed motor Drifting Margin Possible Causes 1 Power OFF the printer Move the carriage assembly The carriage should move smoothly If it does not remove the cause of the binding 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 90 OKIDATA Service Guide ML380 7 Chapter 4 Failure amp Repair Analysis 4 6 FAULT ALARMS 4 6 01 General Information Follow these guidelines when using the Troubleshooting Tables 1 Record the status OFF solidly ON Flashing of the Operator Panel LED s 2 Go to the Fault Alarm Lamp Display Table Section 4 6 02 3 Look for the LED Indications you have observed 4 The Table will provide a Failure Description Probable Cause and Recommended Action 5 The Recommended Action will direct you to take action Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Bus
80. ou wish to fax your response please use the numbers listed in the Service Center Reference Guide Mailing Address If you respond by mail please use the appropriate address listed in the Service Center Reference Guide Information Provided Please provide the following information when reporting problems Okidata Dealer Number Technicians Name Company Name Company s Address Street City State Province ZIP Postal Code Country Telephone and Fax Numbers with area country access codes Product Name Units Serial Number Firmware Revision Level Description of Problem Document Name with page number or procedure with error or problem 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 OKIDATA Service Guide ML380 C BR Chapter 4 Failure amp Repair Analysis 4 3 TROUBLESHOOTING UPDATES 4 3 01 General Information Okidata distributes updated troubleshooting information in three ways Okilink Il Faxable Facts Technical Service Bulletins 4 3 02 Okilink II Okilink II is Okidata s Bulletin Board Service This service is available to all Okidata Certified Service Technicians Okilink Il provides troubleshooting and service information Technicians can download files ask questions of Okidata s technical support personnel and participate in round table discussions about Oki
81. out the dust from the sensors Platen Clean with platen cleaner 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 75 FA Service Guide ML380 OKIDATA Chapter 3 Maintenance amp Disassembly 3 5 LUBRICATION 3 5 01 General Information This equipment is designed to be maintenance free and oiling is unnecessary during operation However when assembly or cleaning of oiled parts occurs lubricant is required 1 Lubricant Grease type lubricant Machine Oil or equivalent Areas to be Lubricated Carriage Shaft Wipe the carriage shaft with a lint free cloth that has been ightly dampened with machine oil Then wipe the carriage shaft with a dry lint free cloth Space Rack Apply a small amount of grease to the space rack gear teeth CAUTION If you apply lubricant to the following areas the printer may be damaged or output quality can be degraded Carriage Drive Belt Flexible Head Cable Microswitches Platen Surface Pressure Roller Surface Pressure Rollers on Paper Bail Bar Printhead Ribbon Cartridge Tractor Pins 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 ai DATA Service Guide ML380 OKI PI Chapter 3 Maintenance
82. p bpx okidata com Page 46 OKID AT A Service Guide ML380 Chapter 3 Maintenance amp Disassembly 3 2 12 Bail Arms 1 Perform these procedures 3 2 01 3 2 0254 3 2 10 7 and 3 2 11 7 2 Use pliers to remove the left bail arm spring 1 3 Push claw 2 downward pull it out of guide hole 3 of main frame and remove the left bail arm 4 4 Remove the left bail arm from the bail bar 5 5 Use pliers to remove the right bail arm spring 6 Push claw downward pull it out of guide hole of main frame and remove the right bail arm 7 Remove the right bail arm from the bail bar P N 50911801 Spring Bail Arm L RSPL B 2 04 7 P N 53511001 Bail Arm L RSPL B 2 04 P N 50911701 Spring Bail Arm R RSPL B 2 04 P N 53511101 Bail Arm R RSPL B 2 04 7 P N 51110501 Shaft Indicator Assembly RSPL B 2 04 Bail Bar 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 47 OKID AT A Service Guide ML380 Chapter 3 Maintenance amp Disassembly 3 2 13 Carriage Frame 1 Perform these procedures 3 2 01 7 3 2 02 4 and 3 2 03 2 Open the supporting point A and remove the head clamp 1 3 Insert a screwdriver into the groove of carriage frame 2 and remove ribbon protector 3 4 Turn the white left adjust bushing 4 to the lower end and remo
83. p Blinks Slowly Paper End Jam Conditions A slowly blinking SELECT lamp usually indicates a cover open paper jam or paper end out of paper 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 86 m an Service Guide ML380 OKIDATA Chapter 4 Failure amp Repair Analysis 4 4 03 START HERE Flowchart START Power ON the unit Does the printer initialize NO Is SELECT blinking NO Refer to RAP 01 YES Refer to Section 4 6 of this Service Handbook YES Load the printer with paper Does the paper load without jamming NO Refer to RAP 04 YES Perform the Rolling ASCII test Refer to Section 4 8 of this Service Handbook Is the output satisfactory NO Refer to Section 4 5 of this Service Handbook YES Are all operator panel switches operating properly NO Replace the operator panel YES Has the problem been resolved YES End of procedure NO Does the parallel or serial interface port receive data from the host PC properly YES End of procedure NO Which port is NOT receiving data Parallel Refer to RAP 05 Serial Refer to RAP 05 End of 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 Page 87 OKIDATA Service Guide ML
84. pacing 25 2 2 03 Ribbon Drive 26 2 2 04 Paper Feed 27 2 2 05 Paper End Detection 28 2 2 06 Semi Automatic Sheet Feeder SASF 29 2 2 07 Paper Park 30 3 Maintenance amp Disassembly 3 1 Maintenance General Information 31 3 1 02 Maintenance Tools 32 3 1 03 Maintenance Precautions 33 3 2 Disassembly Assembly Procedures General Information 34 9 2 01 Paper Separator 35 3 2 02 Printhead 36 3 2 03 Upper Cover Assembly 37 3 2 04 Space Rack 38 Table of Contents Page 3 2 05 Ribbon Feed Gear Assembly 39 3 2 06 Mini Pitch Space Belt 40 9 2 07 Head Connector Assembly 41 9 2 08 Main Control Board UMMB 42 3 2 09 Operation Panel 43 3 2 10 Line Feed Motor 44 3 2 11 Photosensor Assembly Paper End 45 0 2 12 Bail Arms 46 9 2 13 Carriage Frame 47 3 2 14 Platen Assembly 48 3 2 15 Pressure Roller Assembly 49 3 2 16 Paper Pressure Guide 50 3 2 17 Tractor Assembly 51 9 2 18 Microswitch Assembly SASF 52 9 2 19 Microswitch Assembly Home Position Switch o3 3 2 20 Printer Mechanism 54 3 2 21 Power Supply Unit 55 3 2 22 Space Motor Assembly 56 9 2 23 Bottom Paper Guide Lever 57 3 3 Printer Adjustments 58 9 9 02 Gap Between Platen and Printhead 59 3 3 03 Space Belt Tension 60 3 3 04 Key Combinations 61 9 9 05 Menu Operation Menu Select Mode General 62 Information ee From Print Mode 63 From Power
85. pdates Okidata distributes the TSBs through Okilink Il The TSBs are issued monthly 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 123 OKIDATA Service Guide ML380 P Chapter B Illustrated Parts Listing B 1 03 Parts Ordering Information Service Center Reference Guide When a technician has successfully completed a Service Training Course for a product and the Dealer has become Service Authorized an information package is provided to the Dealer The Okidata Service Center Reference Guide outlines the following items Responsibilities of Okidata Service Centers Spare parts and consumables information Procedures for warranty repairs Product Training Certification and Authorization Product Support information Okidata Depot information and services Third Party Service information Information about Okidata s Customer Information Center Okidata Service and Support telephone numbers The Service Center Reference Guide contains the procedures to follow for ordering parts Please read understand and follow these procedures Service Authorization for a specific product must be obtained before a Dealer can submit warranty claims Direct questions regarding the Service Center Reference Guide to Okidata Dealer Service Refer to the Service Center Reference Guide for inf
86. per into the printer Use the bail lever If you are using continuous forms be sure that you have the paper loaded squarely onto the tractors If the sprocket holes are out of sync on either side the paper will jam If the paper does jam back it out of the printer carefully using the platen knob Be sure to remove any shreds of paper from the printer before loading the paper If you re using continuous feed paper you can do this by using the following procedure Back the paper out of the printer Fold the paper over three times to produce a page four sheets thick Load the folded sheet onto the tractor pins Turn the platen knob to bring the paper around the platen This will clear the pieces of jammed paper out of the tractor path and bring them up and out so you can dispose of them Don t forget to remove the quadruple thick sheet from the printer before you return to printing 4 Dots are missing on printouts The head gap may not be set correctly Try moving the head gap lever to a lower setting If that doesn t help the printhead may be damaged 5 Word processor files don t print the way the menu and front panel are set Before sending a file to the printer many word processors send either an initialization string or an I Prime signal to the printer The initialization string contains codes that reset the printer to a default set of features Otherwise the printer might accidentally print using features set for a previous job
87. platen and carriage shaft changes 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 26 Tw c Service Guide ML380 OKIDATA Chapter 2 Principles of Operation 2 2 03 Ribbon Drive The ribbon drive mechanism moves the ribbon in synchronization with the space motor operation The ribbon drive mechanism consists of the following items Ribbon Drive Gear assembly Space Rack Ribbon Cartridge Ribbon Cartridge An endless ribbon with a single direction feed is used Ink is Supplied from an ink tank which is built into the ribbon cartridge Ribbon Feed Operation The rotation of the space pulse motor is transmitted to the drive gear in the ribbon cartridge through the space rack and 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 uni directional ribbon movement when bi directional printing is used 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 FA Service Guide ML380 OKIDATA Chapter 2 Principles of Operation 2 2 04 Paper Feed Paper feeding is performed by turning the platen and the pi
88. 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 Paper tear off can only be used with continuous feed paper fed in from the rear on the built in push tractor It cannot be used with the optional pull tractor Procedure 1 Load continuous feed paper into the printer 2 Verify that the printer is selected SELECT lamp is lit 3 Press the FONT and PITCH buttons at the same time This places the printer in Menu Mode The SELECT lamp will go out 4 Press GROUP until the following line is printed Vertical Control Line Spacing 6 LPI 5 Press ITEM to advance the Menu to Form Tear Off 6 Press SET to change the menu setting for Form Tear Off To activate form tear off the setting must be ON To deactivate form tear off the setting must be OFF 7 Press SELECT to exit Menu 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 73 r an Service Guide ML380 OKIDATA Chapter 3 Maintenance amp Disassembly
89. printwires are activated thereby extending the printhead life to approximately 200 million characters The printhead uses 24 printwires two columns of 12 wires each Each wire is welded to an armature 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 a magnetic field which counters 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 printhead is composed of the following parts Wire Guide Print Wires Armature Assembly Yoke Spring Spacer Magnet Assembly Thermistor Printed Circuit Board 1 When printing Paper Armature assembly Thermistor Print wire Wa NE 27777 lel wie ie A Z Emil ee acer j Printed circuit Magnet assembly board 2 When not printing Copyright 1997
90. pter 4 Failure amp Repair Analysis 4 1 02 Printer Serial Number Identification To identify the revision level of a printer record the serial number from the back of the printer Refer to the following to decode the serial number Example Printer Serial Number 401A0154693 Date Code 401 4 year 01 month Revision A Serial Number 0154693 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 an Service Guide ML380 OKIDATA Chapter 4 Failure amp Repair Analysis 4 1 03 Firmware Revision Identification To identify the revision level and part number of the firmware print the Rolling ASCII Test or the Font Test Refer to Section 4 8 for information on printing the tests Header At the top of each test is a header This header provides the following information printer model 1 emulation 2 version 3 firmware revision number 4 firmware part number 5 character generator revision number 6 and character generator part number 7 ML380 EPS A F W 03 01 YRA077 xxxx RES 01 00 YR4084 xxxx12345 76 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 P an Service Guide ML380 OKIDATA Chapter 4 Failure amp Repair A
91. r any updates to this material http bpx okidata com CO 3 2 05 3 2 06 3 2 06 3 2 06 3 2 06 3 2 1353 3 2 13 3 2 1353 3 2 17 3 2 17 3 2 17 3 2 17 3 2 17 Page 131 OKID AT A service Guide ML380 eom Chapter B Illustrated Parts Listing B 2 07 Option Parts Part numbers are subject to change Refer to Okilink II for current part numbers and pricing information 1is not shown 8 Includes 9 and 10 Okidata P N Description Comments Refer to Disassembly Oki J P N B 1 02 Procedure 1 70000803 Kit IBM PC Cable Option N A Kit for Parallel Printers 2 70016001 Kit Cut Sheet Option N A Feeder 3800 Single Bin ML380 3 70016101 Kit Super Speed Option Incl 4 5 6 7 N A RS 232C ML380 4 N A Module Interface Option Inc 5 6 7 N A 4YA4042 1451G1 RS232C 5 53511601 Cover Upper Option RSPL Part of N A 2PP4043 3718P1 RS232C I F 4 N A N A N A A 55047901 PCB UMRS Option RSPL Part of N A 4YA4042 1451G11 RS232C I F w o 4 ROM 7 53511501 Cover Lower Option RSPL Part of 2PP4043 3717P1 RS232C I F 4 70015901 Kit Pull Tractor Option Inc 9 and 10 ML380 50072001 Unit Tractor Option Part of 8 3PA4025 2971G1 10 53510501 Cover Tractor Option Part of 8 N 1PP4094 1084P1 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 132 OKID ATA Servi
92. rator 2 and pull it out diagonally in the direction of Arrow A 4 Do the following to avoid interference when removing the upper cover assembly Close the covers of the tractor assemblies 3 Slide the assemblies to the center of the printer unit 5 Remove the two screws 4 The screws are at the back of printer on the bottom 6 Lift the rear part of the upper cover 5 pull it forward and remove it 7 Raise the access cover 6 90 and remove it from the upper cover P N 50071101 Separator Sheet Assembly RSPL B 2 02 7 P N 50071201 Separator Sheet B 2 02 P N 53510201 Support Sheet B 2 02 4 P N 51901101 Knob Platen RSPL B 2 03 P N 53510401 Guide Sheet L B 2 02 5 P N 53510301 Guide Sheet R B 2 02 P N 53510101 Cover Access RSPL B 2 02 P N 53510001 Cover Middle 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 opx okidata com Page 38 WAIT AT AP Service Guide ML380 OKIDATA Chapter 3 Maintenance amp Disassembly 3 2 04 Space Rack 1 Perform this procedure 3 2 02 2 Remove the two screws 1 on the carriage plate 2 Do not remove the ribbon feed gear assembly 3 Slide the carriage frame 3 in the direction of Arrow A leaving the carriage plate in place 4 Set the carriage plate under the space rack 4 5 Release the claw 5 6 Remove the B sid
93. reaches approximately 90 degrees 129 degrees Celsius a head overheat ALARM 1 is generated When ALARM 1 is detected bi directional printing stops Uni directional printing begins If the printhead temperature continues to increase 130 degrees Celsius ALARM 2 is generated Printing stops until the head temperature decreases When the head temperature drops below the ALARM 1 threshold printing resumes Low DC Voltage Detection Circuit The 35 vdc drive voltage is monitored for a low voltage condition during each print operation If the 35 vdc drops the negative terminal input voltage of the comparator Q8 decreases the comparator reverses state and the DC LOW P signal is switched ON When the signal DC LOW P is active printing is accomplished by using twelve of the twenty four printwires in a dual pass print 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 OKIDATA Service Guide ML380 1d Chapter 2 Principles of Operation 2 1 09 Paper End Detection Circuit PAPER END is detected by a photosensor When the printer detects an out of paper condition the PEN signal goes low printing is stopped and the ALARM LAMP is switched ON Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this mate
94. rements T Commonly Used Serial Cable Configurations 4 8 05 Hexadecimal Dump Mode 4 9 Resistance Checks General Information 4 9 02 Main Control Board UMMB Voltage Check Points 4 9 03 Connectors Block Diagram 4 9 04 Connector Location 4 9 05 Resistance Diagrams Printhead opace and Line Feed Motors 4 9 06 Head Cable Connection A Board Diagrams A1 Board Diagrams General Information A 2 Index To Charts 2 01 Main Control Board UMMB Original A 2 02 Main Control Board UMMB Current A 2 03 RS232 C Serial Module UMRS B Illustrated Parts Listing B 1 Overview General Information B 1 02 Definition of Terms 115 116 117 118 119 120 121 122 Table of Contents Page B 1 03 Parts Ordering Information 123 B 2 Charts 124 B 2 01 Printer 125 B 2 02 Covers 126 B 2 03 Printer Unit 127 B 2 04 Printer Mechanism 1 of 3 128 B 2 05 Printer Mechanism 2 of 3 129 B 2 06 Printer Mechanism 3 of 3 130 B 2 07 Option Parts 131 B 2 08 Consumables 132 B 2 09 Packaging 133 B2 10 Documentation 134 B 2 11 Service Training Kit Revision List 135 Page 2 OKIDATA Chapter About This Manual Manual Copyright 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
95. responsible for errors beyond its control 1994 by Okidata All rights reserved First Edition August 1989 P N 59238701 Second Edition September 1993 P N 59238702 Third Edition November 1994 P N 59238703 Written and produced by the Okidata Technical Training Group Please address any comments on this publication to Technical Training Group Okidata 532 Fellowship Road Mount Laurel NJ 08054 3499 Fax Number 609 235 2600 ext 7034 Okilink Login Name Technical Training 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 Centronics Inc PLUG n PRINT is a registered trademark of Oki America Inc marque deposee de Oki America Inc Epson is a registered trademark of Seiko Epson Corporation IBM is a registered trademark of International Business Machine 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 OKIDATA Service Guide ML380 Chapter 1 Product Specifications 1 1 OVERVIEW 1 1 01 General Information The Microline 380 is an 80 column impact dot matrix pri
96. rial http bpx okidata com Page 23 OKIDATA Service Guide ML380 V Chapter 2 Principles of Operation 2 1 10 Power Supply The power supply consists of the power transformer the filter board and the DC power supply circuit on the control board The AC input voltage is transformed into 8 6 VAC and 46 VAC by the power transformer These AC voltages are converted to 8 vdc 5 vdc and 35 vdc levels by the DC power supply circuit on the control board The 5 vdc is a regulated voltage Filter Board The filter board consists of the power switch AC fuse and AC noise filter Power Transformer If the internal temperature of the power transformer rises abnormally the built in temperature fuse will open to prevent any damage to other electrical components NOTE If the temperature fuse in the transformer opens the transformer must be replaced Power Supply Circuit Converts the AC Voltage input to 8 vdc 5 vdc and 35 vdc and supplies it to the control board This circuit also regulates the 5 vdc 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 24 rA Service Guide ML380 OKIDATA Chapter 2 Principles of Operation 2 2 MECHANICAL OPERATION 2 2 01 Printhead Mechanism The Microline 380 uses a highly efficient stored energy type printhead Power is not consumed until the
97. rinted circuit board The original board contains one jumper SP4 Refer to A 2 01 for jumper placement information Summary UMMB Current Board The current board refer to A 2 02 contains the following PROM ROM combination Q2 contains a 1 MB MASK PROM in a socket This PROM contains the printer control firmware and the character generator Q3 is an empty socket However if either the 256 K or 512 K PROMS are installed in Q2 a character generator must be installed in Q3 The current board contains three jumpers SP4 6 and 7 Refer to A 2 02 for jumper placement information 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 118 os Guide ML OKIDATA kaer io A 2 01 Main Control Board UMMB Original Firmware Q2 Control Program PROM Q3 Character Generator CG ROM soldered on the UMMB Fuses F1 2 5 Amp 125V F2 1 6 Amp 125V F1 3 15 Amp 125V Power Supply Filter Board Jumpers SP4 Place this jumper on the A Side for both 512K ROM and the 256K ROM Sensors NONE Switches LED1 Select LED2 Power LED3 Fonts LED4 Fonts LED5 Fonts LED6 Character Pitch LED7 Character Pitch LED8 Character Pitch SW1 Select SW2 Paper Feed SW3 TOF Park SW4 Fonts SW5 Character Pitch Test Points Check the voltages at the testpoints shown 8
98. rinthead 1 11 07 Service Authorized Okidata Service Centers Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BP X for any updates to this material http bpx okidata com Page 14 OKIDATA Service Guide ML380 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 DC power supply circuit and interface connector The switches and LED s of the operator panel are mounted on this board 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 Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 15 A Service Guide ML380 OKIDATA Chapter 2 Principles of Operation 2 1 02 Microprocessor and Peripheral Circuits Microprocessor Q5 83C154GS 551 V1K The microprocessor is the nucleus of the control circuit Its peripheral circuits operate under program control by this microprocessor The I O ports of the microprocessor are connected to the address bus data bus and control lines Program ROM Q2 The program ROM 256 Kbit contains the control program for the printer The microproc
99. rovides round table discussions on technical problems Errors and corrections in the training materials are listed in the Training Section of Okilink Il The Technical Service Bulletins also known as Okidata s Monthly Mail are available via Okilink Il Situations that are NOT addressed in the reference documentation technical service bulletins or round tables may be reported to the Dealer Service and Support Engineers Contact Technical Support or the Technical Training Group You will receive a response to your message within one business day The information on Okilink Il is the most accurate and up to date technical information available from Okidata This is only possible with your assistance By reporting your suggestions concerns and problems Okidata can provide the best possible information Your cooperation is greatly appreciated Thank you for your help 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 OKIDATA Service Guide ML380 e RJ Chapter 4 Failure amp Repair Analysis 4 2 03 Reporting Methods Okilink ll You may use Okilink II to report your findings Refer to the Service Center Reference Guide for information on using Okilink Il Course Critique Use the Course Critique to report any problems you find as you are completing the self paced training Fax Number If y
100. rs Thickness 0 004 inches 0 1 millimeters 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 OKIDATA Service Guide ML380 Chapter 1 Product Specifications 1 8 MEMORY SPECIFICATIONS 1 8 01 EEPROM 256 Kbit EEPROM Used to store Menu data Located at Q18 of the main control board 1 8 02 ROM Program ROM 256 Kbit Located at Q2 of the main control board Resident Character Generator ROM 1 Mbit Masked to the CPU 1 8 03 RAM 32 Kbyte Located on the main control board Used as Receive Buffer Printer Buffer Scratch Pad 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 11 OKIDATA Service Guide ML380 Chapter 1 Product Specifications 1 9 CONSUMABLES 1 9 01 Ribbon CAUTION Using a non Okidata ribbon may damage the printhead and void any warranties Material Cartridge Fabric Types Black Nylon Ribbon Life On average at 10 characters per inch Utility Mode Black Ribbon 2 million characters 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 FA Service Guide ML380 OKID
101. rved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 113 OKID AT A Service Guide ML380 Chapter 4 Failure amp Repair Analysis 4 9 05 Resistance Diagrams Printhead PRINTHEAD z rix z z z x s x f E E v s I E E Is I o me EIFE mye elu Emi EI i ala z 2 i I J be DT Septal sam am Figure Se Apra Contact on the mma 2 sm presheac ma 3 1 3 a UNE TUR REN AN CHS Cin 3 1 32 HEAD CORRAN Frant at rsen a DE NEC DENT rbn TAL Do E Doo 38 20to 1 tot primite A Jitn2 331540 iv 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 114 OKID AT A Service Guide ML380 Chapter 4 Failure amp Repair Analysis Space and Line Feed Motors Connector Mame Signal name Coil resistance Figure s ewer OM drow SPACE MOTOR Soa ofan qo M j o s mo e o eem PET LINE FEED MOTOR ha ME Approx 230 MM ns TRANSFORMER PHOTOSENS OR MECHANICAL SWITCHES 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 115 OKIDATA Service Guide ML380
102. s 5 simultaneously P N 50911501 Guide Paper Pressure RSPL B 2 05 j 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 51 im Ar A Service Guide ML380 OKIDATA Chapter 3 Maintenance amp Disassembly 3 2 17 Tractor Assembly NOTE Horizontal movement of the left tractor is restricted by a stopper on the lower cover 1 Perform these procedures 3 2 01 and 3 2 03 7 2 Remove the tractor drive shaft locking clamp 3 Open the claw 1 and remove the drive gear 2 from the groove 3 of the drive shaft 4 4 Release the right groove 5 of the drive shaft from the guide 6 of the main frame 5 Shift the groove in the direction of Arrows A and B This releases the left part of the drive shaft from the guide hole 7 of the main frame 6 Push the left part of lock shaft 8 and move the groove 9 in the direction of Arrow C to release the groove from the hole 10 in the main frame 7 Shift the lock shaft 8 to the right and move the shaft in the direction of Arrow D to remove the shaft from the larger guide hole 11 8 Push the left part of the tractor assembly in the direction of Arrow E and remove the tractor assembly 12 while pulling the drive shaft in the direction Arrow F This moves the shaft out of the guide holes 13 and 14 of the printer frame 9 Remove the
103. s to this material http opx okidata com Page 9 A Service Guide ML380 OKIDATA Chapter 1 Product Specifications 1 7 PAPER SPECIFICATIONS CAUTION Use Bottom Feed and or optional Pull Tractor for card stock and labels 1 7 01 Types Card Stock Length 3 to 14 inches 76 2 to 356 millimeters Number of Copies Original Paper Feed Path Bottom Printhead Gap Information Refer to the Printhead Gap Information Section 1 6 Thickness 008 inches 0 2 millimeters Maximum Weight 100 Ibs 375 g m 2 Maximum Width 5 to 8 inches 127 to 203 millimeters Continuous Form Length 3 to 14 inches 76 2 to 356 millimeters Number of Copies Original Original 2 Interleaf Original 2 Carbonless Paper Feed Path Rear or Bottom Printhead Gap Information Refer to the Printhead Gap Information Section 1 6 Thickness Single 0 0028 to 0 0039 inches 0 07 to 0 1 millimeters Multi 0 01 inch 25 millimeter Maximum Weight Single Part 14 22 Ib 52 5 to 82 5 to g m 2 Multi Part Carbonless 9 11 Ib 35 to 40 g m 2 Multi Part Interleaf Paper 10 12 Ib 38 to 45 g m 2 Carbon 9 Ib 35 g m 2 Width 3 5 to 10 5 inches 89 to 267 millimeters Cut Sheet Number of Copies Original Original 2 Interleaf Original 2 Carbonless Paper Feed Path Top Printhead Gap Information Refer to the Printhead Gap Information Section 1 6 Note Multi part cut sheet paper CANNOT be used Weight 14 to 22 lbs 52 5 to 82 5 g m 2
104. t 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 OKIDATA Service Guide ML380 Chapter 3 Maintenance amp Disassembly Page 66 Sample Menu sample Menu Manu Moda Fant font Font Font general Gane ral General BGenerasl General General Generel General Baeneral Control Control Control Control Control Control Control Control Control wWerctieoal Cantral Vertical Contral Vertical Control Vertical Cantrsl Vertical Control Wertioal Cantral Symbol Sete Symbol Sete Symbol Sete Parallel Interface Parallel Interface Parallel Interface Serial Interface Serial Interface serial Interface Serial Interface Serial Interface Serial Interface Serial Interface Serial Interface Serial Interface Font Print Made Pitch Style Sire Cut Sheet Feeder Graphics Max Receive Buffer Paper Qut Override Print Registration Operator Panel Functions Reset Inhibit Print Suppress Effective Interface Line Spacing Farm Tear T Skip Over Perforation Aute LF Page Length Cut Sheet Page Length Character Set Language Set zera Character I Prime Signal Auto Fagd XT Fin 16 Qutput Parity Serial Data 7 or B Bilts Protocol Diagnostic Test Buey Line Baud Rate DSR Signal OTR Signal Busy Time Print Hade L Courier 18 CPI Hermal single Not Installed
105. t Document N A N A 59238703 Handbook Service N A N A 5B 59235903 Handbook Printer N A N 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
106. ter 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 the 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 Press TOF 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 paper To return to continuous feed printing perform the following 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 72 Tw c Service Guide ML380 OKIDATA Chapter 3 Maintenance amp Disassembly 3 3 08 Paper Tear Off General Information This feature when activated will automatically advance continuous feed paper to the tear off position after it finishes
107. ts reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com Page 128 Service Guide ML380 Chapter B Illustrated Parts Listing OKIDATA B 2 04 Printer Mechanism 1 of 3 Part numbers are subject to change Refer to Okilink II for current part numbers and pricing information Okidata P N Description Comments Disassembly Oki J P N Refer to B 1 02 Procedure a 1 53510801 Rack Space RSPL 3PP4043 3755P 1 50904801 Spring Coil RSPL LB 193000 1 N A Screw Self Tapping 4PP4050 2621P1 51219201 Pulley Idle RSPL 3PP4043 3683P 1 53330301 Bracket Idle Pulley RSPL 4PP4043 3756G1 56507801 Motor Line Feed RSPL 3PB4043 3772P1 56106901 Photosensor RSPL 3 2 11 ii 4YX4043 3781G1 Assembly Paper End 50911801 Spring Bail Arm L RSPL 4PB4025 2843P1 53511001 Bail Arm L RSPL 2PP4043 3696P 1 0 50911701 Spring Bail Arm R RSPL 4PB4025 2842P1 53511101 Bail Arm R RSPL 3PP4043 3697P1 2 51110501 Shaft Indicator HSPL 4PB4043 3809P 1 Assembly Bail Bar CO 51606501 Bushing Adjust L RSPL 4PP4043 3684P 1 51606601 Bushing Adjust R RSPL 4PP4043 3685P 1 53510701 Lever Adjust RSPL 3PP4043 3687P1 51110401 Shaft Carriage RSPL 4PP4043 3769P 1 7 50704601 Collar Eccentric RSPL 4PP4043 3686P 1 NN N C A CO NO O O1 L a a 2 ET 2 a 2 a 2 a 2 3 2 04 3 2 06 3 2 06 3 2 06 3 2 0
108. ures 3 2 01 7 3 2 03 7 and 3 2 20 2 Push the pin 1 of the bottom paper guide lever 2 and remove the pin from the guide hole 3 of the main frame 3 Remove the pin 4 from the guide hole 5 of the main frame and remove the bottom paper guide lever NOTE When the paper chute 6 is installed the cut sheet paper end lever 7 must engage firmly with the bottom paper guide lever P N 53510901 Lever Bottom Paper Guide 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 58 an Service Guide ML380 OKIDATA Chapter 3 Maintenance amp Disassembly 3 3 PRINTER ADJUSTMENTS 3 3 01 General Information This section contains the procedures for performing adjustments on the printer These procedures may be required when replacing either consumables or parts The disassembly assembly procedures list the required adjustments and refer you to this section Failure to perform these procedures may result in unnecessary service calls 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 TA Service Guide ML380 OKIDATA Chapter 3 Maintenance amp Disassembly 3 3 02 Gap Between Platen and Printhead General Informati
109. uttons at the same time 5 he SELECT lamp will go out and MENU MODE will print on the paper 6 Use the control panel to make menu changes Press GROUP to move to the next group in the menu Press ITEM to move to the next item within a group Press SET to move to the next setting of an item 7 Press EXIT to save the change s and return to Print Mode The SELECT lamp 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 64 an Service Guide ML380 OKIDATA Chapter 3 Maintenance amp Disassembly From Power OFF CAUTION Make sure that paper is installed or the printhead will print on the platen This could damage destroy the printhead platen and ribbon 1 Verify that continuous feed paper is installed 2 Verify that the ribbon is correctly installed 3 Verify that the printer is powered OFF 4 Press and hold FONT while powering ON the printer 5 The POWER lamp will light The SELECT lamp will not light MENU MODE will print on the paper 6 Use the control panel to make menu changes Press GROUP to move to the next group in the menu Press ITEM to move to the next item within a group Press SET to move to the next setting of an item 7 Press EXIT to save the change s and return to Print Mode 8 The SELECT lamp will light Copyright 1997 Okidata Di
110. vdc Line Feed Space Motor Printer Alarm Circuitry 35 vdc Print Wire Drive 5 vdc Printer Logic Main Control Board UMMB Original Jumper Location T Lu o d AI JF Sess F San LILIST TT Lu LEDI Sw zl Swe is Test Points SWI El Fe m LEDY En mow BB iby LEBj uM i E BV An Cul 2 MV 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 119 OKIDATA now A NA DOEA A 2 02 Main Control Board UMMB Current Firmware Q2 Control Program PROM Fuses F1 2 5 Amp 125V F2 1 6 Amp 125V F1 3 15 Amp 125V Power Supply Filter Board Jumpers SP4 A Side 1MB 512K ROM in Q2 B Side 256K ROM in Q2 SP6 A Side 256K 512K ROM in Q2 B Side 1 MB Mask ROM in Q2 SP7 A Side 256K 512K ROM in Q2 B Side 1 MB Mask ROM in Q2 Sensors NONE Switches LED1 Select LED2 Power LED3 Fonts LED4 Fonts LED5 Fonts LED6 Character Pitch LED7 Character Pitch LED8 Character Pitch SW1 Select SW2 Paper Feed SW3 TOF Park SW4 Fonts SW5 Character Pitch Test Points Check the voltages at the testpoints shown 8 vdc Line Feed Space Motor Printer Alarm Circuitry 35 vdc Print Wire Drive 5 vdc Printer Logic Main Control Board UMMB Current Jumper Location
111. ve it 5 Turn the black right adjust bushing 5 to the lower end and remove it 6 Turn the blue adjusting lever 6 to the lower end 7 Slide the carriage shaft 7 to the right 8 Remove the shaft and the adjusting lever 9 Pull the carriage shaft in the direction of arrow B and remove it from the carriage frame 8 Be careful not to lose the eccentric collar 9 When installing the eccentric collar place notched section 10 toward the carriage shaft NOTE Perform the printhead gap adjustment procedure after installing this part Refer to Section 3 3 of this Service Handbook P N 50702901 Clamp Head RSPL B 2 06 P N 53056201 Protector Ribbon RSPL B 2 06 j P N 53330201 Frame Carriage RSPL B 2 06 P N 51606501 Bushing Adjust L RSPL B 2 04 P N 51606601 Bushing Adjust R RSPL B 2 04 j P N 53510701 Lever Adjust RSPL B 2 04 43 P N 51110401 Shaft Carriage RSPL B 2 04 j P N 50704601 Collar Eccentric RSPL B 2 04 5 P N N A Code Earth B 2 04 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 opx okidata com Page 48 WT iA Tt A Service Guide ML380 OKIDATA Chapter 3 Maintenance amp Disassembly 3 2 14 Platen Assembly 1 Perform these procedures 3 2 01 and 3 2 03 7 2 Pull lock levers 1 in the direction of arrow A and raising them at an angle of 90 This r
112. vision 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 Tw FA Service Guide ML380 OKIDATA Chapter 3 Maintenance amp Disassembly Printing the Menu Printing the Menu provides a reference of current menu settings This will help you move through the menu Okidata STRONGLY RECOMMENDS printing the Menu before resetting the Menu to factory defaults Once the Menu is reset all customized settings are LOST To print the Menu follow this procedure CAUTION Make sure that paper is installed or the printhead will print on the platen This could damage destroy the printhead platen and ribbon 1 Verify that continuous feed paper is installed 2 Verify that the ribbon is correctly installed 3 Enter Menu Select Mode either from Print Mode or Power OFF From Print Mode Verify that the printer is powered ON and the SELECT lamp is lit Press the FONT and PITCH buttons at the same time The SELECT lamp will go out and MENU MODE will print on the paper From Power OFF Verify that the printer is powered OFF Press and hold FONT while powering ON the printer The POWER lamp will light The SELECT lamp will not light MENU MODE will print on the paper 4 Press PRINT 5 The Menu will print 6 Press EXIT to exit Menu Mode For more information regarding the menu please refer to the Printer Handbook Copyrigh
113. y level Application problems and detection of faulty components on the printed circuit boards are NOT addressed When troubleshooting a defective unit follow these steps 1 Refer to Section 4 34 which explains where to check for updates to the troubleshooting information 2 Section 4 44 contains tips on preventing problems as well as a list of common problems 3 Section 4 5 shows samples of abnormal outputs 4 Section 4 6 provides tables of error messages 5 Section 4 7 7 contains the Repair Analysis Procedures RAPs Each RAP will ask you questions or require you to make observations The answers to these questions and the results of your observations determine your next course of action Use the RAP Index to identify which RAP should be used to resolve the problem with the machine 6 Section 4 8 7 provides the procedures for various printer tests 7 Section 4 9 7 lists the resistance check points 8 Section 4 24 lists methods for reporting problems If you encounter a situation that is NOT addressed by the documentation in this kit please report the problem to Okidata using one of the methods listed Refer to the Service Center Reference Guide for information on contacting Okidata 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 c Service Guide ML380 OKIDATA Cha
114. ywezyri l LO SWIss i CPI Le 11 2 es 2 5 TRABCDEFGHI UR LEOP ORS TUVERY EE 1 DI abedefgl parztuwaryri 178845 4 1234 5TBR rc zum TRARCDEFGH UE LMNOPORETUVNES mEcdmafgkijkimncgpgrat varyri b 7485 amp 3A amp tee Bi 234 EB TH ou mE TE POH RZTUVNAYZII abcdefghi jk m5aparmgtuswexyzi EQ FREZSTIBE 18 CFI I 7B IL 1 79 812315 557291 TRAECDEFSGHIJEEHSOPQSRSTUSWEYZ N abedetgl pqrskEuwwxyr4i R 17434 amp j 0 12349 57002 g xe HAB CUB FPGHIJELHNOFPORSTUVEE mab dafghijrimnepgrmtuveskykpLlb ERXRti1 91234567H09 c2 TBPABCDEFGHE BXTUVMETZ Vi abodefgh klanopqarnruvuxyzi i LQ ORATOR 15 CF eRe 11 9 78123858 OG pp co TRAREDEZGE JELRNOUFSESTEVNXTZINIT ARCDEFG FUuzrfpvMEITID D RATA h e n B12355878EDi j m T BABCOEF GHI JKLRR PQRE TU WE XS aRcCUF EHTLJELNAM PUR amp TUSWETIL IT ITBERR i j BiA Si Pe pees BABEDETGHI RSTHWWXTYIIXI AREDEFGRI JELNNOPORSTEVMATZI IT Lg OGTHIC 18 CPI AStA C44 BLZAASETUS 422 7NABCDEFGEIJKLMHOPORSTUVMEWI X abodafgh purstuvwrayri l j L BENR p 5 Bl1z23 458 B rtx T PBABCTEF HEJKLBMHDPGRESTUNYBX EkbrdaFghijkimsnpgritu wwxyzi b 1 AR3 30 95 BEESASATHHLa I7MABCDEFGHI RETWWWXTZ V ampdafghijaTunoparstuvwryz l UTL i18 EFT 4E Cpt PRAIA GT pas 7HEBEUEFBHIJELHNDPQRE TUVLIE VZ n abedef gl pureTusuxyzq h Pa Cpe 4223488789 c PACE BHT IE LARP ORS TO sbedefgh il kdanagqeabeve gee PPO Le pte PIP 05 S T

ML380 Dot Matrix Printer

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