Ricoh M379 Manuale utente

Buffer Pass Unit

Machine Code: M379

Service Manual

31 March, 2009

Subject to change

Safety, Conventions, Trademarks

Conventions

Symbol What it means

Core Tech Manual

Screw

Connector

E-ring

C-ring

Harness clamp

FFC Flexible Film Cable

The notations "SEF" and "LEF" describe the direction of paper feed. The arrows indicate the direction of

paper feed.

Warnings, Cautions, Notes

In this manual, the following important symbols and notations are used.

• A Warning indicates a potentially hazardous situation. Failure to obey a Warning could result in

death or serious injury.

• A Caution indicates a potentially hazardous situation. Failure to obey a Caution could result in minor

or moderate injury or damage to the machine or other property.

• Obey these guidelines to avoid problems such as misfeeds, damage to originals, loss of valuable

data and to prevent damage to the machine

• This information provides tips and advice about how to best service the machine.

General Safety Instructions

For your safety, please read this manual carefully before you use this product. Keep this manual handy for

future reference.

Safety Information

Always obey the following safety precautions when using this product.

Safety During Operation

In this manual, the following important symbols and notations are used.

Switches and Symbols

Where symbols are used on or near switches on machines for Europe and other areas, the meaning of

each symbol conforms with IEC60417.

Responsibilities of the Customer Engineer

Customer Engineer

Maintenance shall be done only by trained customer engineers who have completed service training for

the machine and all optional devices designed for use with the machine.

Reference Material for Maintenance

• Maintenance shall be done using the special tools and procedures prescribed for maintenance of the

machine described in the reference materials (service manuals, technical bulletins, operating

instructions, and safety guidelines for customer engineers).

• In regard to other safety issues not described in this document, all customer engineers shall strictly

obey procedures and recommendations described the “CE Safety Guide”.

• Use only consumable supplies and replacement parts designed for use of the machine.

Before Installation, Maintenance

Shipping and Moving the Machine

• Work carefully when lifting or moving the machine. If the machine is heavy, two or more customer

engineers may be required to prevent injuries (muscle strains, spinal injuries, etc.) or damage to the

machine if it is dropped or tipped over.

• Personnel moving or working around the machine should always wear proper clothing and footwear.

Never wear loose fitting clothing or accessories (neckties, loose sweaters, bracelets, etc. ) or casual

footwear (slippers, sandals, etc.) when lifting or moving the machine.

• Always unplug the power cord from the power source before you move the product. Before you move

the product, arrange the power cord so it will not fall under the product.

Power

• Always disconnect the power cord from the inlet of the buffer pass unit and unplug the mainframe

before doing any maintenance procedure.

• After switching off the machine, power is still supplied to the main machine and other devices. To

prevent electrical shock, switch the machine off, wait for a few seconds, then unplug the machine from

the power source.

• Before you do any checks or adjustments after turning the machine off, work carefully to avoid injury.

After removing covers or opening the machine to do checks or adjustments, never touch electrical

components or moving parts (gears, timing belts, etc.).

• After turning the machine on with any cover removed, keep your hands away from electrical

components and moving parts. Never touch the cover of the fusing unit, gears, timing belts, etc.

Installation, Disassembly, and Adjustments

• After installation, maintenance, or adjustment, always check the operation of the machine to make

sure that it is operating normally. This ensures that all shipping materials, protective materials, wires

and tags, metal brackets, etc., removed for installation, have been removed and that no tools remain

inside the machine. This also ensures that all release interlock switches have been restored to normal

operation.

• Never use your fingers to check moving parts causing spurious noise. Never use your fingers to

lubricate moving parts while the machine is operating.

Special Tool

• Use only standard tools approved for machine maintenance.

• For special adjustments, use only the special tools and lubricants described in the service manual.

Using tools incorrectly, or using tools that could damage parts, could damage the machine or cause

injuries.

During Maintenance

General

• Before you begin a maintenance procedure: 1) Switch the machine off, 2) Disconnect the power plug

from the power source, 3) Allow the machine to cool for at least 10 minutes.

• Avoid touching the components inside the machine that are labeled as hot surfaces.

Safety Devices

• Never remove any safety device unless it requires replacement. Always replace safety devices

immediately.

• Never do any procedure that defeats the function of any safety device. Modification or removal of a

safety device (fuse, switch, etc.) could lead to a fire and personal injury. Always test the operation of

the machine to ensure that it is operating normally and safely after removal and replacement of any

safety device.

• For replacements use only the correct fuses or circuit breakers rated for use with the machine. Using

replacement devices not designed for use with the machine could lead to a fire and personal injuries.

Organic Cleaners

• During preventive maintenance, never use any organic cleaners (alcohol, etc.) other than those

described in the service manual.

• Make sure the room is well ventilated before using any organic cleaner. Use organic solvents in small

amounts to avoid breathing the fumes and becoming nauseous.

• Switch the machine off, unplug it, and allow it to cool before doing preventive maintenance. To avoid

fire or explosion, never use an organic cleaner near any part that generates heat.

• Wash your hands thoroughly after cleaning parts with an organic cleaner to contamination of food,

drinks, etc. which could cause illness.

• Clean the floor completely after accidental spillage of silicone oil or other materials to prevent slippery

surfaces that could cause accidents leading to hand or leg injuries. Use “My Ace” Silicone Oil

Remover (or dry rags) to soak up spills. For more details, please refer to Technical Bulletin “Silicone

Oil Removal” (A024-50).

Power Plug and Power Cord

• Before serving the machine (especially when responding to a service call), always make sure that the

power plug has been inserted completely into the power source. A partially inserted plug could lead

to heat generation (due to a power surge caused by high resistance) and cause a fire or other

problems.

• Always check the power plug and make sure that it is free of dust and lint. Clean it if necessary. A

dirty plug can generate heat which could cause a fire.

• Inspect the length of the power cord for cuts or other damage. Replace the power cord if necessary.

A frayed or otherwise damaged power cord can cause a short circuit which could lead to a fire or

personal injury from electrical shock.

• Check the length of the power cord between the machine and power supply. Make sure the power

cord is not coiled or wrapped around any object such as a table leg. Coiling the power cord can

cause excessive heat to build up and could cause a fire.

• Make sure that the area around the power source is free of obstacles so the power cord can be

removed quickly in case of an emergency.

• Make sure that the power cord is grounded (earthed) at the power source with the ground wire on

the plug.

• Connect the power cord directly into the power source. Never use an extension cord.

• When you disconnect the power plug from the power source, always pull on the plug, not the cable.

After Installation, Servicing

Disposal of Used Items

• Never incinerate used toner or toner cartridges.

• Toner or toner cartridges thrown into a fire can ignite or explode and cause serious injury. At the work

site always carefully wrap used toner and toner cartridges with plastic bags to avoid spillage before

disposal or removal.

• Always dispose of used items (developer, toner, toner cartridges, OPC drums, etc.) in accordance

with the local laws and regulations regarding the disposal of such items.

• To protect the environment, never dispose of this product or any kind of waste from consumables at

a household waste collection point. Dispose of these items at one of our dealers or at an authorized

collection site.

• Return used selenium drums to the service center for handling in accordance with company policy

regarding the recycling or disposal of such items.

Safety Instructions for this Machine

Prevention of Physical Injury

1. Before disassembling or assembling parts of the machine and peripherals, make sure that the machine

and peripheral power cords are unplugged.

2. The plug should be near the machine and easily accessible.

3. Note that some components of the machine and the paper tray unit are supplied with electrical voltage

even if the main power switch is turned off.

4. If any adjustment or operation check has to be made with exterior covers off or open while the main

switch is turned on, keep hands away from electrified or mechanically driven components.

5. If the [Start] key is pressed before the machine completes the warm-up period (the [Start] key starts

blinking red and green ), keep hands away from the mechanical and the electrical components as

the machine starts making copies as soon as the warm-up period is completed.

6. The inside and the metal parts of the fusing unit become extremely hot while the machine is operating.

Be careful to avoid touching those components with your bare hands.

7. To prevent a fire or explosion, keep the machine away from flammable liquids, gases, and aerosols.

Observance of Electrical Safety Standards

1. The machine and its peripherals must be installed and maintained by a customer service representative

who has completed the training course on those models.

2. The NVRAM on the system control board has a lithium battery which can explode if replaced

incorrectly. Replace the NVRAM only with an identical one. The manufacturer recommends replacing

the entire NVRAM. Do not recharge or burn this battery. Used NVRAM must be handled in accordance

with local regulations.

Trademarks

• Microsoft®, Windows®, and MS-DOS® are registered trademarks of Microsoft Corporation in the

United States and /or other countries.

• PostScript® is a registered trademark of Adobe Systems, Incorporated.

• PCL® is a registered trademark of Hewlett-Packard Company.

• Ethernet® is a registered trademark of Xerox Corporation.

• PowerPC® is a registered trademark of International Business Machines Corporation.

• Other product names used herein are for identification purposes only and may be trademarks of their

respective companies. We disclaim any and all rights involved with those marks.

TABLE OF CONTENTS

Safety, Conventions, Trademarks......................................................................................................................1

Conventions....................................................................................................................................................1

Warnings, Cautions, Notes...........................................................................................................................1

General Safety Instructions............................................................................................................................2

Responsibilities of the Customer Engineer....................................................................................................3

Before Installation, Maintenance..................................................................................................................3

During Maintenance......................................................................................................................................4

After Installation, Servicing............................................................................................................................6

Safety Instructions for this Machine...............................................................................................................7

1. Replacement and Adjustment

Exterior Covers.................................................................................................................................................11

Rear Cover...................................................................................................................................................11

Top Cover.....................................................................................................................................................11

Right Cover...................................................................................................................................................13

Left Cover......................................................................................................................................................13

Operation Panel...........................................................................................................................................13

Drive Components............................................................................................................................................15

Drive Motor..................................................................................................................................................15

Drive Motor Base.........................................................................................................................................15

Cooling and Exhaust Fans...............................................................................................................................17

Cooling Fans................................................................................................................................................17

Exhaust Fans.................................................................................................................................................20

Sensors and Switches......................................................................................................................................22

Transport Sensors.........................................................................................................................................22

Switches........................................................................................................................................................24

Electronic Components....................................................................................................................................27

Controller Board..........................................................................................................................................27

PSU................................................................................................................................................................28

SRB................................................................................................................................................................30

Interface Cable............................................................................................................................................30

2. Details

Overview..........................................................................................................................................................33

Components Layout.....................................................................................................................................33