Oki Microline 3390-3391 free download

File name Oki Microline 3390-3391 printer.pdf

Ў MICROLINE 3390/3391 PRINTER Maintenance Manual All specifications are subject to change without notice. PREFACE This maintenance manual describes how to maintain the Microline 3390/3391 printer in the field. This manual is for customer engineers. For further information, refer to the Users Manual for handling or operating the equipment. iii TABLE OF CONTENTS 1. CONFIGURATION 1.1 1.2 2. Standard Printer Configuration Options THEORY OF OPERATION 2.1 Electrical Operation 2.1.1 2.1.2 2.1.3 2.1.4 2.1.5 2.1.6 2.1.7 2.1.8 2.1.9 2.2 Summary Microprocessor and the Peripheral Circuit Initialization Parallel Interface Control Print Control SP/LF Motor Control Operation Panel Alarm Circuit Power Supply Circuit Mechanical Operation 2.2.1 2.2.2 2.2.3 2.2.4 2.2.5 2.2.6 2.2.7 2.2.8 Printhead Mechanism and Operation Spacing Operation Head Gap Adjusting Ribbon Drive Paper Feed Operation Paper Detection Mechanism Automatic Sheet Feed Paper Park Function 3. ASSEMBLY/DISASSEMBLY 3.1 3.2 3.3 Precautions for Parts Replacement Service Tools Disassembly/Reassembly Procedure 3.3.1 3.3.2 3.3.3 3.3.4 3.3.5 3.3.6 3.3.7 3.3.8 Printhead Ribbon Protector Pull-up Roller Assy Upper Cover Assy, Access Cover Assy and Sheet Guide Assy Gear Case Assy PC Connector Space Motor, Guide Roller Assy Space Rack i 3.3.9 Carriage Cable 3.3.10 Backup Roller Holder Assy 3.3.11 Platen Assy 3.3.12 Driver Board (SRXD) 3.3.13 LF Motor 3.3.14 Operation Panel PCB (LEOP) 3.3.15 Control/Power Supply Board (SRXC) 3.3.16 Transformer Assy 3.3.17 Change Lever and Gears 3.3.18 Carriage Shaft 3.3.19 Paper Pan 3.3.20 Rear Tractor Assy 3.3.21 Rear Pressure Assy 3.3.22 Switch Lever 4. 5. ADJUSTMENT CLEANING AND LUBRICATION 5.1 5.2 6. Cleaning Lubrication TROUBLESHOOTING AND REPAIR 6.1 6.2 6.3 6.4 6.5 Items to Check Before Repair Troubleshooting Table Lamp Display Connection Circuit Check for Printhead and SP/LF Motor Troubleshooting Flow Chart APPENDIX A. B. C. PCB LAYOUT SPARE PARTS LIST RS-232C Serial Interface Board (OPTION) ii 1. CONFIGURATION 1. CONFIGURATION 1.1. Standard Printer Configuration This printer consists of the following assemblies: Sheet guide assy Platen knob Access cover assy Upper cover Transformer assy Pull-up roller assy Control/Power supply assy Driver board Operation panel assy Main frame Figure 1-1 Configuration 1­1 1.2 Options (1) Cut sheet feeder unit (CSF) (Narrow and wide versions available) Dual-bin CSF Single-bin CSF Attachment assy (2) Pull-tractor assy 1­2 (3) Bottom push tractor unit (4) Roll paper stand (Narrow only) (5) Serial I/F · RS232C · RS422A · Current Loop 1­3 2. THEORY OF OPERATION 2. 2.1 THEORY OF OPERATION Electrical Operation The electrical operation of the printer circuit is described in this section. 2.1.1 Summary Fig. 2-1 shows the block diagram of the printer. The control board is made up of the microprocessors, peripheral circuits, drive circuits, sensors and interface connectors. The power to the control board i