Oki KN-2550 Maintenance Manual
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Oki KN-2550 Maintenance Manual

Oki KN-2550 Maintenance Manual

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Bridge Kit KN-2550
Maintenance Manual
060114A

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Summary of Contents for Oki KN-2550

  • Page 1 Bridge Kit KN-2550 Maintenance Manual 060114A...
  • Page 2 Trademarks • Mylar is a registered trademark of DuPont Teijin Films U.S. Limited Partnership. • Molykote is a registered trademark of Dow Corning Corporation. • Other company names and product names in this manual are the trademarks of their respective companies.
  • Page 3 GENERAL PRECAUTIONS FOR INSTALLATION/SERVICING/ MAINTENANCE The installation and service should be done by a qualified service technician. 1. When installing the Bridge Kit KN-2520/2550, be sure to follow the instructions described in the "Unpacking/Set-Up Procedure for the KN-2520/2550" booklet which comes with each unit of the KN- 2520/2550.

  • Page 5: Table Of Contents

    CONTENTS 1. SPECIFICATIONS......................1-1 2. GENERAL DESCRIPTION.................... 2-1 Sectional View........................2-1 Electric Parts Layout ......................2-2 Symbols and Functions of Various Components .............. 2-2 3. DESCRIPTION OF OPERATIONS ................3-1 General Description ......................3-1 Driving System ........................3-2 4. DISASSEMBLY AND ASSEMBLY ................4-1 Disassembly Procedure ....................
  • Page 6 KN-2520/2550 CONTENTS...

  • Page 7: Specifications

    SPECIFICATIONS Item KN-2520 KN-2550 Remarks Paper size A3, A4, A4-R, A5-R, B4, B5, B5- Follow the A3, A3 wide , SR-A3 , A4, A4-R, R, FOLIO, LD, LG, LT, LT-R, ST- paper size A5-R, B4, B5, B5-R, A6-R, R, COMPUTER, 13”LG,...
  • Page 8 KN-2520/2550 SPECIFICATIONS 1 - 2...

  • Page 9: General Description

    GENERAL DESCRIPTION Sectional View Transport rollers Transport sensor-2 Transport rollers Transport sensor-1 Gate Paper full detection sensor Fig. 2-1 KN-2520/2550 GENERAL DESCRIPTION 2 - 1...

  • Page 10: Electric Parts Layout

    Electric Parts Layout SOL1 Fig. 2-2 Symbols and Functions of Various Components Symbol Name Function Remarks Transport sensor-1 Detects paper on the transport path (entrance side) Transport sensor-2 Detects paper on the transport path (exit side) Paper full detection sensor Detects paper full on the inner tray Open/close detection Detects the open/close state of the bridge...

  • Page 11: Description Of Operations

    DESCRIPTION OF OPERATIONS General Description This unit transports paper from the exit section of the equipment to the finisher. The transport rollers which comprise the bridge unit are rotated by the drive from the host machine. This unit has a switching gate on its entrance section which decides whether the transported paper from the exit roller of the host machine is transported to the finisher or to the inner tray.

  • Page 12: Driving System

    Driving System Fig. 3-2 Symbol Function Drive gear (G24/P20) + one-way pulley (P20) Pulley (P20) + one-way pulley (P20) Drive gear (G24/P20) + pulley (P20) Timing belt KN-2520/2550 DESCRIPTION OF OPERATIONS 3 - 2...

  • Page 13: Disassembly And Assembly

    DISASSEMBLY AND ASSEMBLY Disassembly Procedure [A] Reverse guide Take off the bridge unit. Remove 2 screws and take off the reverse Reverse guide guide. Fig. 4-1 [B] Transport sensor-1 (S1) Take off the bridge unit. Take off the reverse guide. Stay ...
  • Page 14 Disconnect 1 connector [2] and release the latches to remove the transport sensor-2 (S2) [3]. Fig. 4-4 [D] Transport sensor-2 (S2) [KN-2550] Take off the bridge unit. Take off the reverse guide.  P.4-1 "[A] Reverse guide" Remove the spring [1] and take off the actuator [2].
  • Page 15 [F] Paper full detection sensor (S3) Take off the bridge unit. Remove 1 screw, and take off the sensor cover. Sensor cover Fig. 4-7 Take off the actuator [1]. Disconnect 1 connector [2] and release the latches to remove the paper full detection sensor (S3) [3].
  • Page 16 Remove 2 screws, and take off the gate Plunger solenoind and plunger from the bracket. Solenoid Bracket Fig. 4-10 KN-2520/2550 DISASSEMBLY AND ASSEMBLY 4 - 4...

  • Page 17: Lubrication

    Lubrication Applicable Items to check Lubrication/Coating Models Pulley rotating part of the stud W1: White grease (Molykote EM-30L) Gear rotating part of the stud W1: White grease (Molykote EM-30L) Pinch roller shaft W1: White grease (Molykote EM-30L) Bushing part of the transport roller shaft W1: White grease (Molykote EM-30L) (front) [A] Pulley rotating part of the stud...
  • Page 18 [C] Pinch roller shaft Apply some white grease (Molykote EM-30L) to the roller pinch roller rotating part of the pinch roller shaft, and then install the pinch roller. Wipe off the grease which comes out of the rotating part, and then install the lower guide [2]. Notes: •...

  • Page 19: Electric Circuit

    ELECTRIC CIRCUIT Harness Connection Diagram J802 Transport sensor-2 J681 BRDEEXT-1 +5V Q1 J806 J803 INOPTFUL-1 Paper full detection sensor INOPSEL-1 SG Q2 INOPSEL-2 INOPSEL-3 J801 Equipment INOPCOV-1 INOPTFED-1 Transport sensor-1 INOPTSNS INOPTSOL-0A +24V J804 Gate solenoid OFFSET1A OFFSET2A J805 Open/close detection sensor Fig.
  • Page 20 KN-2520/2550 ELECTRIC CIRCUIT 5 - 2...

This manual is also suitable for:

Kn-2520

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