Oki MB760 Manuale utente

MB760 / MB760+ / MB770 / MB770+

MPS5502 / MPS5502+

2nd Tray Maintenance Manual

80113A

Disclaimer

Every effort has been made to ensure that the information in this document is complete, accurate, and up-to-

date. The manufacturer assumes no responsibility for the results of errors beyond its control. The

manufacturer also cannot guarantee that changes in software and equipment made by other manufacturers and

referred to in this guide will not affect the applicability of the information in it. Mention of software products

manufactured by other companies does not necessarily constitute endorsement by the manufacturer.

While all reasonable efforts have been made to make this document as accurate and helpful as possible, we

make no warranty of any kind, expressed or implied, as to the accuracy or completeness of the information

contained herein.

The most up-to-date drivers and manuals are available from the web site:

http://www.okiprintingsolutions.com

45479001TH Rev.1 3 /

Oki Data CONFIDENTIAL

This manual explains the maintenance methods of OptionTray unit optionally In-

stalled in the MB760/MB770.

This manual is prepared for the maintenance person. In regard to the handling

methods of MB760/MB770, please refer to the User’s Manual.

Note! • The descriptions in this manual are subject to change without prior notice.

• While all reasonable efforts have been made to make this document

as accurate and helpful as possible, we make no warranty of any kind,

expressed or implied, as to the accuracy of the information contained

herein. Oki Data assumes no responsibility to the damages caused or

claimed to have been caused by the user as a result of repair, adjust-

ment and/or change using this manual.

• Parts of this product are delicate and can be damaged unless properly

handled. We strongly recommend the user to maintain the product at the

hand of the registered maintenance person of our company

• Before starting the maintenance work, please neutralize the static elec-

tricity.

PREFACE

Oki Data CONFIDENTIAL

REPLACEMENT OF PARTS

This chapter describes the procedures of the ﬁeld replacement of parts, assemblies and units. The procedures are to

detach them. Reverse the procedures to attach them.

The reference part numbers used in this manual (such as ①and ②) do not identical to the part numbers in the

maintenance disassembly conﬁguration diagram (45479001TL) and RSPL (45479001TR) for the manual.

1.1 Notes on replacement of parts ......................................................5

1.2 Part replacement procedure..........................................................7

45479001TH Rev.1 5 /

Oki Data CONFIDENTIAL 1. REPLACEMENT OF PARTS

1.1 Notes for Replacing of Parts

(1) Prior to replacing a part, unplug the AC cord and the interface cable.

(a) Be sure to use the following procedure to unplug the AC cord:

Turn off the printer, then the LED indicator goes out.

Pull out the AC plug of the AC cord from the AC power source.

Unplug the AC cord and the interface cable.

(2) Do not disassemble it if the printer works normally.

(3) Disassemble it as required. Do not remove the part that is not shown in

the replacement procedure.

(4) Please use the speciﬁed maintenance tool.

(5) Disassemble it according to the proper procedure. It may cause

damageto the parts if disassemble it without following the proper

procedure.

(6) As the small parts such as the screws are lost easily, please ﬁx them to

the original position temporarily.

(7) Do not use gloves that may cause static electricity easily when handling

IC and the circuit board such as microprocessor, ROM, and RAM.

(8) Do not put the PCB on the device and the ﬂoor directly.

(9) Do not work for a long time with the printer with the top cover open, and

an image drum unit installed in it.

Electric shock hazard.

(b) Always use the following procedure to reconnect the printer:

Connect the AC cord and the interface cable to the printer.

Connect the AC power cord insertion plug to the AC power source outlet.

Turn on the printer, then the LED indicator lights up.

There is a risk of electric shock during replacement of the low voltage power supply.

Use insulating gloves or avoid direct contact with any conducting part of the power

supply, and caution should be exercised during replacement.

The capacitor may take one minute to complete discharge after the AC cord is

unplugged. Also, there is a possibility that the capacitor doesn’t discharge because

of a breakage of the PCB, etc., so remember the possibility of electric shock to avoid

electric shock.

Remove

Install

45479001TH Rev.1 6 /

Oki Data CONFIDENTIAL 1. REPLACEMENT OF PARTS

Maintenance Tools:

Table 1-1-1 shows the tools necessary to replace printed-circuit boards and units:

Table 1-1-1: Maintenance Tools

No. Maintenance Tool Q'ty Use Remarks

No. 2-200

screwdriver with

magnetic tip

13 to 5mm

Screws

2Screwdriver No.

3-100 1

3Digital multimater 1

4Pliers 1

5E-ring pliers 1 E-shaped ring

removal

Screws in use:

Shape Designation

Screw(silver)

Screw(silver/8mm)

Screw(black)

Screw(shoulder)

45479001TH Rev.1 7 /

Oki Data CONFIDENTIAL 1. REPLACEMENT OF PARTS

1.2.1 Board-GOH-12 etc

(1) Remove the two screws (Silver,No:41723901) ①and remove the

Joint ②,and remove the Option Tray from MFP.

(2) Remove the cassette ③from Option Tray Unit.

1.2 Parts Replacement procedure

This Section contains the parts replacement for parts and assemblies.

⑩

⑪⑪

⑪

⑧

⑯

⑮×4

⑭

㉓×2

㉔

⑩

⑰×2

⑱

⑳⑲×2

⑬×2

㉑

⑨

㉒

⑫

⑦

④×2

⑤×3

⑥

⑤×3

②

①

③

(3) Remove the two screws(Black,No:42932708) ④,and six

screws(Silver,No:42920406) ⑤,and remove the Cover-Side-L ⑥and Cover-

Side-R ⑦.

(4) Remove the three screws (silver) ⑧and the two screws(black) ⑨, and remove

the Plate-Joint ⑩.

(5) Remove the four screws (silver) ⑪and remove the Plate-Top ⑫.

(6) Remove the two screws (black) ⑬, and remove the Cover-Front ⑭.

(7) Remove the four screws (black) ⑮, and remove the Hopping-Assy ⑯.

(8) Remove the two screws (silver) ⑰, and remove the Board-GOH-12 ⑱.

(9) Remove the two screws (shoulder) ⑲, and remove the Connector ⑳.

(10)Remove the screw (black) 󰼼, and remove the Switch 󰽇.

(11)Remove the two screws (black) 󰽈, and remove the Connector 󰽉.

45479001TH Rev.1 8 /

Oki Data CONFIDENTIAL

1. REPLACEMENT OF PARTS

1.2.2 Paper Feed Roller

In the hopping jam occures frequently, to change the pickup roller and the separation roller.

feed roller

(with gear)

pickup roller

(without gear)

Note! Change all rollers at once.

(1) Pull out the cassette after turning off the printer.

(2) Remove the rollers ①, ②while warping each latch.

(3) Set the new roller (with gear) ①to the shaft.

①

Cassette

②

①

45479001TH Rev.1 9 / 9

Oki Data CONFIDENTIAL

1. REPLACEMENT OF PARTS

②

(4) Set the new roller (without gear) ②to the shaft.

Note! Check that the two rollers do not come off.

(5) Return the cassette to the main body.

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