Mita-Kyocera FS5900C SERVICE MANUAL [UK]

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WARNING

CLASS KLASSE CLASSE CLASE

1 LASER PRODUCT 1 LASER PRODUKT 1 LASER PRODUIT 1 LÁSER PRODUCTO

ATTENTION: Rayonnement laser invisible dangereux en cas d'ouverture. EXPOSITION DANGEREUSE AU FAISCEAU.

VARNING: Osynlig laserstrålning när denna del är öppnad. STRÅLEN ÄR FARLIG.

VARO!: Näkymätöntä avattaessa olet alttiina lasersäteilylle. ÄLÄ KATSO SÄTEESEN.

VARNING: Osynlig laserstrålning när denna del är öppnad. BETRAKTA EJ STRÅLEN.

ADVARSEL: Usynlig laserstråling ved åbning. UNDGÅ UDSÆTTELSE FOR STRÅLING.

PELIGRO: Cuando se abre, se producen radiaciones invisibles de láser. EVÍTESE LA EXPOSICIÓN A TALES RAYOS.

DANGER: Invisible laser radiation when open. AVOID DIRECT EXPOSURE TO BEAM.

CAUTION: Invisible laser radiation when open. AVOID EXPOSURE TO BEAM.

VORSICHT: Unsichtbare Laserstrahlung, wenn Abdeckung geöffnet. NICHT DEM STRAHL AUSSETZEN.

ADVARSEL: Usynlig laserstråling når deksel åpnes. UNNGÅ EKSPONERING FOR STRÅLEN.

PJQTA0325ZA

This service information is designed for experienced repair technicians only and is not designed for use by the general public. It does not contai n w arnings o r caut ions to adv ise n on-tech nical indi vi duals of pot ential dange rs in att emptin g to s ervice a product. Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to service or repair the product or products dealt with in this service information by anyone else could result in serious injury or death.

DANGER: Invisible laser radiation when open and interlock defeated. AVOID DIRECT EXPOSURE TO BEAM.

PELIGRO: Cuando se abre y se invalida el bloqueo, se producen radiaciones invisibles de láser. EVÍTESE LA EXPOSICIÓN A TALES RAYOS.

CAUTION: Invisible laser radiation when open and interlocks defeated. AVOID EXPOSURE TO BEAM.

VARNING: Osynlig laserstrålning när denna del är öppnad och spärrar är urkopplade. STRÅLEN ÄR FARLIG.

VORSICHT: Unsichtbare Laserstrahlung, wenn Abdeckung geöffnet und Sicherheitsverriegelung überbrückt. NICHT DEM STRAHL AUSSETZEN.

VARO!: Näkymätöntä avattaessa ja suojalukitus ohitettaessa olet alttiina lasersäteilylle. ÄLÄ KATSO SÄTEESEEN.

ATTENTION: Rayonnement laser invisible dangereux en cas d'ouverture et lorsque la sécurité est neutralisée. EXPOSITION DANGEREUSE AU FAISCEAU.

VARNING: Osynlig laserstrålning när denna del är öppnad och spärren är urkopplad. BETRAKTA EJ STRÅLEN.

ADVARSEL: Usynlig laserstråling ved åbning når sikkerhedsafbrydere er ude af funktion. UNDGÅ UDSÆTTELSE FOR STRÅLING.

Laser diode properties

Laser output : 5 mW max Wavelength : 780 nm Emission duration : Continuous

Class 3B

ADVARSEL: Usynlig laserstråling når deksel åpnes og sikkerhedslås brytes. UNNGÅ EKSPONERING FOR STRÅLEN.

(220-240 VAC equipment)

CAUTION:

HOT SURFACE INSIDE

CAUTION:

HOT SURFACE INSIDE

ATTENTION:

SURFACE CHAUDE CI-INTERIEUR

VORSICHT:

HEISSE FLÄCHE INTERN

ATENCION:

SUPERFICIE CALIENTE EN EL INTERNO

Laser Scanning Unit (LSU)

CAUTION:HOT SURFACE BELOW ATTENTION:SURFACE CHAUDE CI-DESSOUS VORSICHT:HEIßE OBERFLÄCHE DARUNTER ATENCION:SUPERFICIE CALIENTE ABAJO

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FS-5900C Service Manual

1. Introduction

1.1 Specifications ................................................................................................................. .................... 1

1.2 Options, Accessories and Supplies...................................................................................................... 5

1.3 Control Panel Overview ...................................................................................................................... 6

1.3.1 Message Display........................................................................................................................ 6

1.4 Rear Panel........................................................................................................................................... 8

1.4.1 Connectors................................................................................................................................. 8

1.4.2 Network card............................................................................................................................. 8

1.5 Parts Identification ............................................................................................................................. 9

1.5.1 Front side view.......................................................................................................................... 9

1.5.2 Rear side view ........................................................................................................................... 9

1.6 Component Layout...........................................................................................................................10

1.7 Electrical Components......................................................................................................................11

1.8 Switches/Sensors Identification ........................................................................................................12

2. Installation , Setup, an d Repa cking

2.1 Installation Requirements................................................................................................................. 13

2.1.1 Environment............................................................................................................................ 13

2.1.2 Minimum Space Requirements .............................................................................................. 13

2.2 Setup................................................................................................................................................14

2.2.1 Removing the Packing Material............................................................................................. 14

2.2.2 Installing the Optional Paper Feeder ....................................................................................14

2.2.3 Preparing the Imaging Unit ...................................................................................................14

2.2.4 Installing the Toner Developers............................................................................................. 15

2.2.5 Adding Paper or Transparencies............................................................................................ 16

2.3 Installing RAM SIMMs (Option) ........................................................................................................16

2.4 Replacing the Fuser Unit...................................................................................................................17

2.5 Replacing the Imaging Unit.............................................................................................................. 18

2.6 Repacking.........................................................................................................................................21

3. Mode Selection

3.1 Navigating through the Menus ........................................................................................................29

3.1.1 Display Information........................................................ ...... ....... ...... ....... ...... ....... ...... .. ..... .... 29

4. Mechanical Functions

4.1 Drive Mechanism/Image Process General Description....................................................................... 30

4.2 Print Process.....................................................................................................................................32

4.2.1 Discharging and Charging...................................................................................................... 32

4.2.2 Laser Exposure and Scanning................................................................................................32

4.2.3 Developing............................................................................................................................... 34

4.2.4 Toner Transfer to the Accumulator Belt ................................................................................ 35

4.2.5 Paper Pickup ...........................................................................................................................35

4.2.6 Toner Transfer to Paper..........................................................................................................36

4.2.7 Fusing and Exiting.................................................................................................................. 36

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Table of Contents

5. Removal and Replacement Procedures

5.1 Upper Rear, Lower Rear and Top Covers............................................................................................38

5.2 Left Side Cover and Multi-purpose Tray ............................................................................................38

5.3 Operation Panel Cover and Printer LCD Board..................................................................................39

5.4 Safety Interlock Switches and Toner Empty Sensor Board (T)............................................................40

5.5 Front Cover and Bottom Front Cover................................................................................................4 1

5.6 Front Right Side, Rear Right Side and Lower Right Side Covers.........................................................42

5.7 Left Side Cover..................................................................................................................................43

5.7.1 Left Side Cover Removal .........................................................................................................43

5.7.2 Left Side Cover Sub Assembly................................................................................................43

5.8 Printer Main Control Board, HSYNC Board and Network Relay Board...............................................44

5.8.1 Printer Main Board Removal..................................................................................................44

5.8.2 Printer Main Control Board Disassembly, HSYNC Board and Network Relay Board........44

5.9 Paper Feed Unit ................................................................................................................................4 5

5.9.1 Paper Feed Unit Removal .......................................................................................................45

5.9.2 Paper Feed Unit Board and MP Tray Paper Out/Registration Sensor Board......................45

5.9.3 Transfer Roller Clutch, Transfer Roller Holder, Cleaning Roller Holder and

Registration Roller...................................................................................................................46

5.9.4 MP Tray Retard Pad................................................................................................................48

5.9.5 MP Tray Motor, MP Tray Pickup Roller and MP Tray Pickup Roller Shaft.........................49

5.9.6 Pickup Roller, Pickup Roller Shaft Assembly and Paper Empty Sensor Arm .....................51

5.9.7 Paper Feed Roller and Paper Feed Unit Frame.....................................................................52

5.10 Toner Developer Selector/Paper-eject Unit.........................................................................................53

5.10.1 Toner Developer Selector/Paper-eject Unit Removal.............................................................53

5.10.2 Covers, Sensor Boards (Paper Ejection, Paper Exit, Paper Tray Full) and

Paper Ejection Roller....... ...... ....... ...... ....... ...... ...... ....... .................................................... .. .... .54

5.10.3 Cam Motor Board, Toner Developer Movement Sensor Board and Toner Selector Cam....56

5.10.4 Joint Gear and Face Down Switch Back Solenoid.................................................................57

5.10.5 Switch Back Shaft, Switch Back Roller and Face Down Switch Gate..................................58

5.11 Engine Control Board Shield Cover...................................................................................................60

5.12 Laser Scanning Unit (LSU).................................................................................................................60

5.13 Power Supply Unit............................................................................................................................61

5.13.1 Power Supply Unit Removal ...................................................................................................61

5.13.2 Power Supply Unit Sub Assembly..........................................................................................61

5.14 Engine Control Board .......................................................................................................................6 2

5.15 Fuser/Toner Developer Fan Motor and Ozone Fan Motor ..................................................................62

5.16 Main Motor, Paper Feed Motor and Left Side Cover Switch..............................................................63

5.17 Transfer Roller Bias Terminal, FTR Bias Terminal, Home Sensor Board and Fuser Joint Connector ......63

5.18 IT Cleaning Solenoid Board and Toner Developer Drive Motor/Toner Developer Drive Unit ...............64

5.18.1 Removal (IT Cleaning Solenoid Board and Toner Developer Drive Motor/

Toner Developer Drive Unit)...................................................................................................64

5.18.2 Toner Developer Drive Unit Sub Assembly............................................................................65

5.19 Printer Main Control Board Holder, Printer Panel Relay Board and High Voltage Board ....................67

5.20 IT Belt Cleaning Drive Gears, Cleaning Clutch Shaft Assembly, Main Motor Bracket, Imaging Unit Coupling Connector, Fuser Coupling Connector and Optional 2nd Feeder

Coupling Connector..........................................................................................................................68

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FS-5900C Service Manual

5.21 Cassette Detection Sensor Board...................................................................................................... 69

5.22 Pre-Exposure Eraser and Pre-Transfer Boards.................................................................................... 69

5.23 Pre-Transfer Board Bracket and Toner Developer Guide Rails ............................................................70

5.23.1 Pre-transfer Board Bracket .................................................................................................... 70

5.23.2 Toner Developer Guide Rails.................................................................................................. 71

5.24 Cassette Guide, Fuser Guide Frame and Fuser/Paper Feed Unit Drive Gears...................................... 72

5.25 Fuser Unit Component (Heat Lamp, Thermal Fuse and Thermostat)................................................. 73

6. Electrical Circuit Description

6.1 Engine Block Diagram ......................................................................................................................75

6.2 Printer Main Control Board Block Diagram.......................................................................................76

6.3 Basic engine functions......................................................................................................................77

6.4 Engine controller system.................................................................................................................. 77

6.4.1 Configuration memory............................................................................................................ 77

6.4.2 High-voltage generator ................................ ...... ....... ...... ...... ....... ...... ....... ...... ....... ...... ....... .... 77

6.4.3 Laser scanner control.............................................................................................................. 77

6.4.4 Polygon motor control ............................................................................................................. 77

6.5 Safety interlock.................................................................................................................................77

6.5.1 The engine gate array............................................................................................................. 78

6.5.2 Power supply ............................ ....... ................................................... ....... .............................. 85

6.6 Logic controller system..................................................................................................................... 87

6.6.1 Printing data processing.........................................................................................................89

6.7 Main logic component .....................................................................................................................89

6.8 Print engine (video) interface ...........................................................................................................92

6.8.1 Physical Characteristics .........................................................................................................93

6.9 Interface Signals...............................................................................................................................94

6.9.1 Signal functions....................................................................................................................... 94

6.9.2 Serial control lines .................................................................................................................. 95

7. Setting the Colour Density

8. Preventative Maintenance

8.1 General................................................................................................................. .... ........................99

8.2 Recommended Tools.........................................................................................................................99

8.3 Recommended Cleaning...................................................................................................................99

8.4 Maintenance Tables........................................................................................................................100

8.4.1 User Maintenance.................................................................................................................100

8.4.2 Service Maintenance.......... ...... ....... ................................................... ....... ...... ...................... 10 1

9. Troubleshooti ng

9.1 Initial Troubleshooting Flowchart ................................................................................... ........... .....102

9.2 Error Messages............................................................................................................................... 103

9.2.1 Error Messages...................................................................................................................... 103

9.2.2 Call Service person Codes..................................................................................................... 105

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Table of Contents

9.3 Jam.................................................................................................................................................108

9.3.1 Print Media Problem .............................................................................................................108

9.3.2 Print Media skews. ................................................................................................................108

9.3.3 Printer cannot distinguish between paper and transparency. ............................................108

9.3.4 Paper jams at the media cassette. ........................................................................................109

9.3.5 Paper jams midway in the paper feeder. ..............................................................................109

9.3.6 Paper jams at the second bias transfer roller.......................................................................110

9.3.7 Fuser Jams.............................................................................................................................110

9.3.8 Eject Jams..............................................................................................................................111

9.3.9 Multi-purpose Tray Jams......................................................................................................111

9.4 Print Quality....................................................................................................................................112

9.4.1 Blank Print.............................................................................................................................112

9.4.2 All-black Print........................................................................................................................112

9.4.3 Missing Primary Colour ........................................................................................................113

9.4.4 Light Print..............................................................................................................................113

9.4.5 Repeated spots or lines on print in-line with each other.....................................................114

9.4.6 Dark Vertical Line in Print ...................................................................................................114

9.4.7 White horizontal line or band in all the colours of a print ..................................................115

9.4.8 Mis-transfer, missing portions of toner.................................................................................115

9.4.9 Dirty Background ..................................................................................................................115

9.4.10 Partial Black Dots..................................................................................................................115

9.4.11 Dark Irregular Streaks in All Colours...................................... ...... ....... ...... ....... ...... ....... .....116

9.4.12 Ghosting .................................................................................................................................116

9.4.13 Unfused or Partially Fused Printing....................................................................................116

9.4.14 Image is skewed on the paper. ..............................................................................................116

9.4.15 Stains on Back of Print..........................................................................................................117

9.4.16 No Printing on Edge of Print.................................................................................................117

9.4.17 Image is not centered on the print when it should be. ........................................................117

9.5 Printer Error (Call Service person) ...................................................................................................118

9.5.1 BB/B8/B9/BA..........................................................................................................................118

9.5.2 A6............................................................................................................................................119

9.5.3 E2/E3......................................................................................................................................119

9.5.4 A5............................................................................................................................................120

9.5.5 AC...........................................................................................................................................122

9.5.6 AD...........................................................................................................................................124

9.5.7 AE...........................................................................................................................................125

9.5.8 AF ...........................................................................................................................................126

9.5.9 B7............................................................................................................................................127

9.5.10 A2............................................................................................................................................128

9.5.11 E4............................................................................................................................................130

9.5.12 A7............................................................................................................................................130

9.5.13 A8............................................................................................................................................131

9.5.14 AA ...........................................................................................................................................132

9.5.15 AB ...........................................................................................................................................133

9.5.16 E1............................................................................................................................................134

9.5.17 A9............................................................................................................................................135

9.5.18 E6............................................................................................................................................135

9.5.19 BC ...........................................................................................................................................135

9.5.20 BD...........................................................................................................................................136

9.5.21 E0............................................................................................................................................136

9.5.22 BE ...........................................................................................................................................137

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FS-5900C Service Manual

9.5.23 BF...........................................................................................................................................137

9.5.24 Call Service person F0 .......................................................................................................... 137

9.5.25 Memory Overflow............................ ...... ....... ...... ....... ...... ...... ................................................ 138

9.5.26 Call Service person F2 .......................................................................................................... 138

9.5.27 Call Service person F3 .......................................................................................................... 139

9.6 No Message Section.......................................................................................................................140

Page 8

1. Introduction

1.1 Specifications

CPU PowerPC 603e (100 MHz) Printing Method Semiconductor Laser

1. Introduction

Printer

Host I/F Standard : Bidirectional Parallel, Serial (8-pin DIN)

Print Speed The speeds listed in the following table represent the time the printer pro-

Resolution 600 × 600 dpi

Paper Output Up to 500 sheets [75 g/m

Option: Network inte rface card

duces multiple prints on various media and resolution (Continuous

throughput rate). Continuous Print Speeds (ppm) Simplex

600 × 600 dpi

Plain Paper colour: 4 Legal colour: 2 Labels, Coated, Card Stock, 2nd Side colour: 2 Transparency colour: 2

1200 × 1200 dpi

Plain Paper colour: 2 Legal colour: 1 Labels, Coated, Card Stock, 2nd Side colour: 2

Duplex 600 × 600 dpi

Plain Paper colour: 2 Legal colour: 1

1200 × 1200 dpi

Plain Paper colour: 1 Legal colour: 0.5

1200 × 1200 dpi (additional RAM required)

(20 lbs.)]

mono: 16 mono: 8 mono: 8 mono: 8

mono: 8 mono: 4 mono: 8

mono: 4 mono: 2

mono: 2 mono: 1

RAM Standard 48 MB (expandable to a maximum of 112 MB with optional

Operating Environment Temperature: 10 to 32.5 °C (50 to 90.5 °F)

Storage Environment Temperature: 0 to 40 °C (32 to 104 °F)

Best Print Quality Temperature: 16 °C to 27 °C (59 °F to 77 °F)

Operating Altitude 0 to 2,500 m (8,000 ft.) Storage Altitude 0 to 4,000 m (13,125 ft.) Warm Up Time Less than 330 seconds (at 22 °C, 50 %RH) Dimensions of Standard

Unit (without Paper Feeder)

SIMMs)

Humidity: 15 to 80 % RH

Humidity: 10 to 80 % RH

Humidity: 36 to 63 % RH

Height: 462 mm (18.2") Depth: 493 mm (19.4") Width: 510 mm (20.1") [784 mm (30.9") with the output tray]

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FS-5900C Service Manual

Printer

Mass (Weight) of standard unit with all consumables

(without optional Paper Feeder)

51 Kg (112 lbs.) Voltage 120 VAC ±10 % Frequency 60 Hz Power Consumption 920 W Max.

210 W (standby)

Less than 45 W (Energy Star mode), meeting the Energy Star power conser-

vation requirements Noise Level 53 dB(A) [Printing mode]

47 dB(A) [Standby mode] Density Control Variable (through the operator panel [MODE key]) Fusing System Heat and Pressure Rollers Photoreceptor Organic Photoconductor (OPC) Belt Development Process One component non magnetic development Toner Yielding

(5% image area)

12,000 pages average (Black toner developer),

10,000 pages average (C.M.Y toner developers) Safety and EMC Standard For the 120 VAC version: UL 1950 listed

FCC Part 15, Subpart B Class B, certified Paper Weight Media cassette*

Simplex

mono: 60 to 105 g/m colour:75 to 105 g/m

(16 to 28 lbs.)

(20 to 28 lbs.)

Paper

Duplex

mono: 75 to 90 g/m colour:75 to 90 g/m

(20 to 24 lbs.)

Multi-purpose tray

Simplex only

mono: 75 to 165 g/m colour:75 to 165 g/m

(20 to 44 lbs.)

(20 to 44 lbs.) Thickness 3.7 to 7.5 mils (1 mil=1/1000") Moisture Content 4% to 6% Smoothness 100 to 300 Sheffield Acid Content 5.5 PH minimum Fusing Compatibility Must not scorch, melt, offset material or release hazard ous emissions when

heated to 200 °C (392 °F) for 0.1 second Cutting Dimensions ±0.0313 inch of normal, corners 90° ±4° Grain Long grain Cut Edge Conditions Cut with sharp blades, no paper dust Ash Content Not to exceed 10 % Curl No allowable curl toward the side to be printed Packing Polylaminated moisture proof ream wrap Paper Size A4 8.3" × 11.7" (210 × 297 mm)

Legal 8.5" × 14" (216 × 356 mm)

Letter 8.5" × 11" (216 × 279 mm) Transparency Size A4 8.3" × 11.7" (210 × 297 mm)

Letter 8.5" × 11" (216 × 279 mm)

Page 10

1. Introduction

Types of paper to avoid

1. Extremely smooth or shiny paper or paper that is highly textured

2. Letterhead imprinted with low temp erature or thermography. These materials may transfer onto the fusing roller and cause damage. Any pre-printed paper should use inks compatible with 200 °C (392 °F) for 0.1 second.

3. Damaged or wrinkled paper, or paper with irregularities such as tabs, staples, etc.

4. Multipart forms or carbonless paper

5. Paper with a 25% or more cotton and/or fiber content

6. Ink jet paper (It may transfer onto the fuser roller and cause damage.)

* We do not recommend the use of 1 05 g/m

paper feed problems may be experienced.

(28 lbs.) paper in areas of high or low humidity and temperature since

Device Cables (Not included with the Printer)

Cables Description

Parallel/Centronics

Serial Requires a Kyocera cable adaptor SA-80 which converts 8-pin DIN to 25-pin DSUB config-

36-pin high-density plug to 25-pin DSUB plug; less than 2.0 m (6.56 ft.) Connects the printer to a PC parallel port

uration.

Specifications are subject to change without notice.

Trademark Acknowledgements

Windows is a registered trademark of Microsoft Corporation in the United States and/or other countrie s. Pentium is a registered trademark of Intel Corporation. Corel is a trademark of Corel Corporation. Adaptec is a registered trademark of Adaptec, Inc. Centronics is a trademark of Centronics Data Computer Corporation. TextBridge is a registered trademark of Xerox Corporation. Adobe and Acrobat are trademarks of Adobe Systems Incorporated. All other acknowledgments are trademarks or registered trademarks of their respective holders. Acrobat Reader copyright 1987-1999 Adobe Systems Incorporated. All rights reserved.

As an Energy Star Partner, Kyocera Corporation has determined that this product meets the Energy Star g uidel ines fo r e nergy ef fici ency. The international Energy StarSM Lo go i s valid in U.S.A., Europe and Japan only.

All about media

• The recommended media is as follows: Letter/Legal: Hammermill LASERPRINT 90 g/m A4: NEUSIEDLER COLOR COPY 90 g/m

For the finest resolution and the brightest, most consistent colours, use a high grade laser paper. The weight of the paper should be 60-105 g/m

(16-28 lbs.) paper in the media cas settes; and 75-120 g/m2 (20-

32 lbs.) in multi-purpose tray.

Transparency: 3M CG3700 and 3M CG3710

(24 lbs.)

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FS-5900C Service Manual

• Labels Use only full 8.5" × 11" or A4 label sheets rath er tha n die-cut l abel sheets t hrough t he mult i-purp ose tray. Die-cut labels may peel off from their backing and stick inside the imaging unit or fuser.

• Envelopes This printer prints black text only using the following high quality #10 laser envelopes with diagonal steams. Do not insert more than one envelope at a time.

• A thin, sharply creased leading edge.

• Paper weight of 90 g /m

(24 lbs.)

• Flat and free of curls, wrinkles, nicks, etc.

• Make sure that the media cassettes are free of dust. Du st and dirt in a media cassette can be transferred to the paper or transparency, resulting in poor print quality.

• Handle paper and transparencies with both hands at the edges to avoid creases and fin gerprints, which can result in poor print quality.

• Store paper and transparencies in the original dust-free package.

• To prevent transparencies or paper from sticking together, fan them before loading into the appropriate media cassette.

• If the optional paper feeder is used: A media cassette can be installed in any of the three tray slots; however, the transparency tray should only be inserted in the upper and middle tray slots.

Margins and Print Area

When the printer places an image on media, the image (print area) is a bit smaller than the media size. Page margins adjustment may be needed in an application software to match the pr int area.

The following table lists the page sizes, the maximum print areas, and the margins for the media sizes supported in KPDL emulation, 600dpi.

Media

cm/inch Points Horizontal Vertical

A4 21.0 × 29.7 595 × 842 112 120 4736 × 6784 B5 18.2 × 25.7 516 × 729 174 97 3950 × 5875 ISO B5 17.6 × 25.0 499 × 708 99 102 3958 × 5700 Legal 8.5 × 14 inches 612 × 1008 86 136 4928 × 8128 Letter 8.5 × 11 inches 612 × 792 86 132 4928 × 6336 Executive 7.25 × 10.5 inches 522 × 756 100 100 4150 × 6100

Page Size Edge limitis (A) (dot)

Horizontal

edge limit

Printable area

Direction of paper feeding

Printable area (B) (dot)

Vertical edge limit

RAM and printer capabilities

The printer features 16 Mbytes of base RAM and a 32-Mbyte SIMM fit in the one of the three connectors that accept 4, 8, 16 and 32-Mbyte RAM SIMMs. With additional RAM memory the printer’s capabilities increase as follows:

Page 12

1. Introduction

When using the Printer Driver and Utilities

Total Memory Selectable Print Quality Mode Printable without Memory Overflow

48 MB (Stan dard)

56 MB (8MB added) 72 MB (24MB added) Letter, A4, Legal

* Documents can be printed on Legal size paper when the print style is set to Color Graphics provided the data size of the documents is small.

Fast (300 dpi) Letter, A4, Legal Standard (600 dpi) Letter, A4*

Letter, A4*

High Quality (1200 dpi)

1.2 Options, Accesso r ies and Supplies

Item Description PF-81 PF-81D HB-7SNMP

EcoLAN 2000E TD-81K TD-81C TD-81M TD-81Y

Paper Feeder Paper Feeder/Duplex Unit Network Card for Ethernet

Toner developer: Black Toner developer: Cyan Toner developer: Magenta Toner developer: Yellow

FK-81 IU-81 TR-81 OS-81 SA-80 HD-2C CP-81 MC-81

Fuser Imaging unit Transfer unit Oil Supply Roll Serial Adapter HDD unit (2GB) Cleaning pad for the fuser Main charger

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FS-5900C Service Manual

1.3 Control Panel Overview

The printer has the following displays and keys. Simple explanation the displays follows. For a full information on using them, refer to the printer’s User’s Manual (also on the CD-ROM).

1.3.1 Message Display

The message display displays the printer’s operati onal mode. Messages which are displayed and their meanings are as follows:

Message Meaning

Self test

Please wait Ready Processing Waiting

FormFeed TimeOut

Interface Indicator

The interface indicator indicates the interface over which data is currently being received or was last received. The current interface is indicated by one of the following messages:

The printer is self-testing after power-up and is not ready to print. This message appears only at power-up.

The printer is warming up and is not ready to print. The printer is ready to print. The printer is processing print data or in the middle of printing. The last page remains unprinted. The printer waits awhile and eventually generates a form

feed allowing the last page to be printed. (The length of time depends on the form feed timeout setting.) The printing will begin immediately when the card is being used this can indicate the printer is waiting for data to be written.

An automatic form feed has been generated.

Form Feed

key is pressed. If a memory

Display Description

PAR SER OPT

Note:

The display will blink while the printer is receiving data and continue blinking until the interface is

Parallel interface Serial interface Optional interface (if a network interface card is installed)

released, even after data transmission is finished.

Page 14

1. Introduction

Resolution Indicator

This shows the current printing resolution in either 1200 or 600 dpi (dot-per-inch).

Paper Size Indicator

This indicator indicates the paper size of the cassette currently selected. The following abbreviations are used to indicate the paper sizes:

Indicator Paper Size

A4 EX B5 LT LG b5

* These paper sizes can only be fed from the MP tray.

ISO A4 (21 × 29.7 cm) Executive (7-¼ × 10-½ inches)* JIS B5 (18.2 × 25.7 cm)* Letter (8-½ × 11 inches) Legal (8-½ × 14 inches) ISO B5 (17.6 × 25.0 cm)*

Copy Indicator

This indicator indicates the number of copies to print from 001 to 999. This number is reduced as printing proceeds.

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FS-5900C Service Manual

1.4 Rear Panel

1.4.1 Connectors

The rear panel is equipped with the following interface connectors:

• Parallel (high densit y conne cto r)

• Serial (8-pin mini DIN-type connector) A converter cable that allows the serial connector to a DSub connector is opt ionally available by the model number SA-80.

1.4.2 Network card

The network interface card is available in either Ethernet or TokenRing protocol as follows. See your nearest dealer of the manufacturer for availability.

Manufacturer Model Applicable country

HBM HB-7SNMP Available in UK and France

Ethernet

Token Ring SEH IC69-Token-KYO2 All countries

Two LEDs on the face of the optional network card verify LAN connection and network activity.

DPI EcoLAN 2000E Available in USA and Japan SEH IC59-ETHER-KYO2 Other countries

Installing the Network Card

Example:

HB-7SNMP EcoLAN 2000E

10BASE2

10BASE-T

Page 16

1.5 Parts Identification

1.5.1 Front side view

1. Introduction

Control panel

Right side cover

Output tray

Media cassette

Front cover

1.5.2 Rear side view

Fuser

Imaging unit

Network interface card slot

Serial interface connector

Multi-purpose (MP) tray

Power switch

AC inlet

Left side cover [Media thickness switch*]

* Accessible by opening the

left side cover Harddisk access indicator

Parallel interface co nnect or

Memory card connector

Page 17

FS-5900C Service Manual

1.6 Component Layout

Page 18

1.7 Electrical Components

Toner Cartridge Drive Unit

Toner Cartridge Motor

Power Supply Unit

1. Introduction

Polygon Motor Driver Board

Ozone Fan

High Voltage Board

Main Control Board

Engine Control Board

Fuser/Toner

Cartridge Fan

Cleaning Board

Paper Feed Motor

Main Motor

Temperature/ Humidity Sensor Board

Interconnect Board

Lower Door Open Sensor

Page 19

FS-5900C Service Manual

1.8 Switche s/Sensors Identification

Page 20

2. Installation, Setup, and Repacking

2.1 Installation Requirements

2.1.1 Environment

Temperature Range: 10°C to 32.5°C [50°F to 90.5°F] (Temperature fluctuation: ±10°C per hour or less) Humidity Range: 15% RH to 80% RH (Humidity fluctuation: ±20 °C per hour or less) Weight: 51 kg (112 lbs.)

Precautions for installation

Place the unit on a stable, level surface. Do not install the unit under the following conditions:

• Extremely high or low temperature

• Extremely high or low humidity

• Direct exposure to sunlight

• Areas of high dust concentration

• Areas of poor ventilation

• Areas exposed to chemical fumes

• Areas with extreme vibration

• Directly in air conditioning flow

2.1.2 Minimum Space Requirements

Allow air flow around the printer to prevent overheating. The following minimum spaces are required:

Rear

35 cm (13.8") Controller Board

45 cm (17.7")

Output tray

Left Right

Multi-purpose Tray

Front cover

50 cm (19.7")60 cm (23.6")

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FS-5900C Service Manual

2.2 Setup

2.2.1 Removing the Packing Material

1. Remove the plastic bag from the printer.

2. Remove any adhesive tape that holds the output tray against the printer.

Note:

Do not throw away the packing materials. They may be required to ship or transport the printer in the future. To provide optimum print quality , the unit must be kept upright and level during unpacking.

2.2.2 Installing the Optional Paper Feeder

Warning:

1. Place the paper feeder on a solid table or cart selected for the printer.

2. Place the printer on top of the paper feeder. Always keep the printer upright.

3. Make sure that the left and right alignment pins fit in the holes in the base of the printer.

The printer weighs about 51 kg (112 lbs.) and the paper feeder weighs about 14.4 kg (36.3 lbs.). Observe standard precautions for lifting heavy objects.

The printer is not permanently attached to the paper feeder. When moving the printer, turn the power off and remove the power cord, then move the pieces separately; moving the printer incorrectly may damage it and may cause personal injury.

Alignment pins

(Left door side) (Cassette slots side)

2.2.3 Preparing the Imaging Unit

1. Open the front door.

Paper Feeder

Page 22

2. Turn the upper green lever clockwise until it stops

and the arrows are aligned. (This applies tension to the internal belts).

3. Close the front cover.

2.2.4 Installi ng the Toner Developers

2. Installation, Setup, and Repacking

Note:

The toner developers shipped with the printer are starter developers. They are installed in exactly the same manner as t h e standard developers; the only difference is that the starter developers have less toner. (Page life expectancy is 5,000 pages for all toner developers except black which has a life expectancy of 6,000 pages.)

1. Remove the packaging from the toner developer.

2. Remove the shipp ing cover from the developer.

Caution:

Do not tilt the developer to avoid possible toner spillage.

3. Open the printer’s right side door.

Caution:

Do not leave the right side door open for a long time; the imaging unit inside is exposed to light and will be damaged.

4. Insert the toner developer in the appropriately

labeled slot. From top to bottom, the developer order is BLACK, CYAN, MAGENTA, and YELLOW.

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FS-5900C Service Manual

5. Repeat steps 1, 2 and 4 for each toner developer.

6. When all the toner developers have been installed,

close the right side door.

Note: Save all packing material for shipping purposes.

2.2.5 Adding Paper or Transparencies

The printer is shipped with one media cassette of either Letter or A4 paper size. The printer can also use five different cassettes as follows:

Tray Size

A4 Paper 210 × 297 mm (8.27" × 11.7") A4 Transparency 210 × 297 mm (8.27" × 11.7") Letter Paper 8.5" 11" (216 × 279 mm) Letter Transparency 8.5" × 11" (216 × 279 mm) Legal paper 8.5" × 14" (216 × 356 mm)

Notes:• Make sure that correct media is loaded. Each cassette is designed and labeled for only paper or

transparency. If the wrong media type is loaded in a tray, an error message will be displayed when printing is attempted.

• If the paper feeder is installed and the automatic tray switching feature (for example, for a large

print job) is used, make sure that all trays in the printer at any one time are the same media type and size.

• To optimize the printer’s performance, always use clean, unused media.

• Be careful not to leave fingerprints on the media, which can result in a smudged print.

• Reusing media that has been fed through the printer (for example, after jams or if the media is

ejected without being printed) can reduce the life of the consumables and paper path components.

2.3 Installing RAM SIMMs (Option)

1. Turn off the printer. Do not unplug the printer; this preserves a ground path to dissipate static charges.

2. Remove the two screws from the controller board.

3. Pull out the controller board.

Controller Board

4. When installing a single RAM SIMM:

Insert a memory module in connector YS3 or YS4 and tilt the module down until it locks in place. When the SIMM is properly inserted, a tab on each end of the connector slips into a hole on each end of the RAM SIMM. Also, a pawl on each end of the connector latches around each end of the RAM SIMM to lock it in place. Go to step 6.

~AC IN

Screws

Page 24

5. When installing two RAM SIMMs:

YS4

YS3

Controller Board

a b

HOT SURFACE INSIDE

Insert the appropriate memory module in connector YS3 and YS4 and tilt the module down until it locks in place. When the SIMM is properly inserted, a tab on each end of the connector slips into a hole on each end of the RAM SIMM. Also, a pawl on each end of the connector latches around each end of the RAM SIMM to lock it in place.

6. Reinstall the controller board.

7. Reinstall the two screws.

2.4 Replacing the Fuser Unit

1. Remove the new fuser from its packaging; keep the

fuser upright.

2. Installation, Setup, and Repacking

2. Open the front doo r. Turn the small green thumb-

screw counterclockwise to unlock the fuser.

Caution:

The fuser is hot; to avoid personal injury, wait approximately 10 minutes for the fuser to cool before touching it.

3. Grasping the green tab on the right, slide the fuser

out until the safety catch stops it. Press the green lever on the left to release the safety catch.

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FS-5900C Service Manual

4. Hold the fuser as shown and slide it out of the

printer. Dispose of the fuser as normal office waste.

Caution: The fuser weighs approximately 3.2 kg (7.11

lbs.). Take care when handling it.

5. Insert the new fuser into the printer.

6. Turn the small green thumbscrew clockwise to lock

the fuser. Close the front door.

2.5 Replacing the Imaging Unit

1. Open the front door. Loosen the two thumbscrews by

turning them counterclockwise. Turn the lower green lever 180° counterclockwise.

Page 26

2. Grasping the front gree n handle, slide the unit out

until it catches. Lift up the green handle on the left. Pull the imaging unit out of the printer.

Caution: The imaging unit weighs approximately 6.5

kg (14.3 lbs.). Always use the handles when lifting it.

3. If the imaging unit is to be reinstalled, cover it with

an empty box or place it in a dark cabinet to protect it from light exposure. If the unit is to be discarded, dispose of it as normal office waste.

Important:

Do not expose the imaging unit to light for more than approximately 45 seconds, or irreversible damage may result.

2. Installation, Setup, and Repacking

4. Remove the new imaging unit from the packaging.

The imaging unit is extremely light-sensitive. Leave the protective plastic sheet on the imaging unit immediately before installin g it.

Note:

Save all packing material for future shipping purpose.

Page 27

FS-5900C Service Manual

5. Remove the used filter by pulling it forward. Dispose

of the filter as normal office waste. Insert the new filter.

6. Turn the upper green lever clockwise until it stops.

Ozone Filter

7. Remove the protective plastic sheet.

Important:

• Do not touch the green surface. Fingerprints may a ffect the print quality.

• Do not expose the imaging unit to light for more than 45 seconds, or irreversible damage may result.

8. Grasp the green handles and i nstall the new unit into

the printer. Release the left handle and push the unit in until it stops.

Plastic Sheet

Handles

9. T urn the lower green lev er clockwise 180° to lock the

imaging unit. T ight en the t wo gree n t humbscrew s by turning them clockwise. Close the front door.

Page 28

2. Installation, Setup, and Repacking

2.6 Repacking

Should the printer need to be transported or shipped, prepare the unit in th e following manner:

Note:

It is highly recommended tha t users keep the ori ginal cart on and all packing ma terials. Observe the following instructions when moving the printer:

Use the original carton and all of the original packing material.

•

Improper repacking of the printer may result in a service charge to repair the unit or a cleaning

•

charge to remove spilled toner. Since the printer uses dry toner, extreme care must be taken when handling. The printer should

•

be handled in the upright (vertical) position.

Materials Required

Original printer, accessory cartons, and other packing materials

•

Newspaper or drop cloth

•

Shipping tape and scissors

•

1. Turn off the printer; remove the power cord and all interface cables.

2. Remove the media cassette(s) from the printer;

remove the media from the cassette(s).

3. Press down on a media cassette’s metal plate. Place the plastic shipping lock into the media cassette as

shown.

Metal Plate

Shipping Look

(3)

(1)

(2)

4. Reinsert the media cassette into the printer; use adhesive tape to secure the cassette to the printer.

5. If the other media casse ttes are in sta lle d, repa ck them for s hi pping or st orage in t heir ori gina l ship pi ng

boxes.

Page 29

FS-5900C Service Manual

6. Open the printer’s front door. Loosen the two thumb-

screws by turning them counterclockwise. Turn the lower green lever 180° counterclockwise.

7. Grasping the front green handle, sli de the unit out

until it catches. Lift up the green handle on the left. Pull the imaging unit out of the printer.

Caution: The imaging unit we igh s app rox imate ly 6.5

kg (14.3 lbs.). Always use the handles when lifting it.

8. Wrap the imaging unit with a protective black plastic

sheet.

Important:

• Do not touch the green surface. Fingerprints may a ffect print quality.

• Do not expose the imaging unit to light for more than 45 seconds, or irreversible damage may result.

9. Move the upper lever 90° counterclockwise; this is

necessary to protect the imaging unit during shipment.

Handles

Plastic Sheet

Page 30

10.Insert the imaging unit into the packaging.

Paper Feeder

Left Side Door

Cover

Tabs

Transfer Roller

2. Installation, Setup, and Repacking

11.Open the left side door. Using the green handles,

slide the paper feeder out.

12.Push in on green tabs to unlock the cover. Raise the

cover until it catches in the open position.

13.Rotate the transfer roller’s green handles up. Lift out

the transfer roller/waste bin.

Page 31

FS-5900C Service Manual

14.Rotate the handles down and wrap the transfer unit

with a piece of paper and adhesive tape.

Note: Do not touch or bump the roller as it can damage

the roller.

15. Install the plastic cover and insert the transfer unit

into a plastic bag and seal the end tightly. Install the transfer unit into the packaging.

Note: Use the plastic cover that is attached to the new

TR-81 transfer unit.

16.Remove the four toner devel opers; install the protec-

tive cover for each developers; repack them for shipping or storage in their original shipping boxes.

Plastic Cover

Plastic Bag

17.Wipe off any loose toner in and around the printer.

Note: If a toner vacuum is available, it is the best tool

for cleaning spilled toner. Do not use a standard office vacuum; the toner will not be retained by typical vacuum dust collectors.

18.Close all printer doors and secure them with adhesive tape.

19.Raise the output tray and secure it to the printer

with adhesive tape. If a paper feeder is not installed, go to Step 21.

20.If a paper feeder is installed:

Lift the printer up and away from the paper feeder.

Safety Caution:

The printer weighs approximately 41.4 kg (91.2 lbs.) and the paper feeder weighs 14.4 kg (31.5 lbs.). Observe standard precautions for lifting heavy objects.

Page 32

Repack the paper feeder in its origina l shipping box.

21.Repack any other accessories in the original shipping box.

22.Repack the printer in the original shipping box. Make

sure that the printer is upright and level when moving. See the diagram on this page.

2. Installation, Setup, and Repacking

Page 33

FS-5900C Service Manual

3. Mode Selection

This section explains the menu levels and options which can be set using the control panel MODE key. The MODE key can be used to display all of the menus in the following diagram:

Ready PAR 600 A4 001

MODE

Parallel

Serial

Option

Number of copies

PCL 5C

Emulation >

KPDL

KPDL (AUTO)

Font >

Bitmap

Scalable

Page orientation

Portrait

Landscape

Press the MODE key.

001

>Interface

>Emulation

>Parallel I/F

>Code set

ISO-6 ASCII

>Print KPDL errs Off

)

(

>Bitmap font

00001

>AudreyTwo-Regular

SWC

>Size

012.00 point (s)

>Pitch

Nibble (high)

High Speed

Normal

Auto

10.00 cpi

(

(*1)

These items will not show unless the printer is installed with the applicable option unit/kit.

>Baud rate 9600

>Data bits

>Stop bits

>Parity

None

>Protocol

DTR (pos.)&XON

>Barcode mode

Off

)

*1:

Depending on the emulation selected,

: Depending on the emulation selected,

the following code sets are available.

the following set >code sets are available.

Opt. ROM >

HARD DISK >

RAM DISK mode >

Continued on next page

>Read data

>List of partitions

>Read data

(*4)

>RAM DISK size

>Read data

>Write data

>Delete data

>Print VMB data Tray:

>List of Partitions

>List of VMB

C5LCP

dnapamtiB

stnoFelbalacS

IICSA6-OSI

nedewS11-OSI nailatI51-OSI niapS71-OSI

yawroN06-OSI

ecnarF96-OSI

8-namoRPH

lageLSU 8-CPMBI

058-CPMBI

6nitaLOSI

.K.U4-OSI

8htaM

tnofiP

ynamreG12-OSI

1nitaL49-AMCE

)N/D(8-CPMBI

ISO Latin 9

stnoFelbalacS

ylnO

htamSP

txetSP

gnihsilbupSM

swodniW

tlabniW

potkseD

2nitaLOSI 5nitaLOSI

1nitaLswodniW 2nitaLswodniW 5nitaLswodniW

577-CP

2nitaL258-CP

4001-CP

hsikruT-CP

hsotnicaM

Page 34

Continued from previous page

MEMORY CARD > >Read fonts

>Read data

>Write data

>Delete data

>Format

>List of Partitions

3. Mode Selection

Paper handling >

Colour mode >

Colour > Matching

Colour > Calibration

>MP tray mode

>MP tray size

>MP tray type

>Duplex mode

>Auto cassette

>Override A4/LT

>Monochrome

>Colour

>Quick Colour

>RGB Simulation

>Vivid mode

>Black 10

>Yellow 10

>Magenta 10

>Cyan

10 >Print Calibration Page

Life counters >

Continued on next page

>Total print 1234567

>TransferRoller > 1234567

>Imaging unit 1234567

>Fuser KIT

1234567

>Oil supply roll 1234567

>Main Charger 1234567

>Cleaning Pad > 1234567

>>Reset Transfer roller ?

>>Reset Cleaning Pad ?

Page 35

FS-5900C Service Manual

Continued from previous page

Others >

>MSG language English

>Form Feed Time out 030sec.

>Sleep timer 060 min

>Print HEX-DUMP

>List of

resident Fonts

>Printer Reset

>LF action

LF only

CR and LF

Ignore LF

>CR action

CR only

CR and LF

Ignore CR

(

(*6)

)

>Ecoprint mode

Off

>Resolution

>Resource prot.

Off

*2:

The printer can be set to print error data during KPDL em ulation. If thi s is set to 2Q, error data will be printed if trouble occurs during printing. This is set to leaving the factory.

*3:

*4:

*5:

*6: *7:

6L]H

The >

Courier

3LWFK

> fonts. The played when an optional hard disk unit is installe d. Any value from 0 to 495 [seconds] in 5second increments. (The printer does not time out with the value set to 0.) Any value from 0 to 120 [minutes] in 5-minute increments. For service purpose only.

menu is not available for the

LetterGothic

and

menu to scale these fixed

5$0#',6.#PRGH

2II

before

fonts. Use the

menu is not dis-

>Buzzer

Off

>Service >

Permanent

Perm / Temp

>>Print Test page 2

>>Print Test Page 1

>>TransferRoller ? Type X

>>Print

Status Page

(*7)

Page 36

3. Mode Selection

3.1 Nav igating through the Menus

The menus are in the hierarchy as shown in the diagram above. Use the + and – keys to move between menus in the same level (“vertically” in the table). The + key shows the next menu, while the – key shows the previous one. Change levels by using the and keys. The key moves to lower levels (sub-menus), while the key moves to higher levels.

2, 4, 6 3

5, 7 1, 8

To make change to a specific item, for example, the sleep mode timeout time, proceed as follows :

1. Press the MODE key.

The message display will show one of the first level menus (Level 1 in the table on pages 25 and 26) depending on the previous selection.

2. Press + until Others > is shown on the display.

3. Press .

The message display will show one of the second level menus (Level 2 in the table on pages 25 and 26) belonging to the Others menu above depending on the previous selection.

4. Press + until Sleep timer is shown on the display.

5. To change the timeout value, press ENTER.

If you want to abandon setting, press CANCEL, then press MODE.

6. Press + repeatedly to increase the timeout time; press – repeatedly to decrease the timeout time until

the desired timeout time (in minutes) is displayed.

7. Press ENTER to confirm the new setting.

You can abandon the new setting by pressing CANCEL, then MODE.

8. To quit the mode selection sequence, press EXIT.

3.1.1 Display Information

Life Counters

Section menu Description

Imaging unit Transfer Roller Fuser Kit Oil supply roll Total print

A count of the total number of images fed since the Imaging unit was last replaced. A count of the total number of pages fed since the Transfer Roller was last replaced. A count of the total number of pages fed since the Fuser Kit was last replaced. A count of the total number of pages fed since th e Oil supply roll was las t replaced. A count of the total number of pages fed since the product is shipped.

Page 37

FS-5900C Service Manual

4. Mechanical Functions

4.1 Drive Mechanism/Image Process General Description

Drive Mechanism

Eight DC servomotors are used to transmit drive to each mechanical block within the engine. The main motor transmits drive to the imaging unit. The paper feed motor transmits drive to the paper feed unit, fuser unit and toner developer selector/paper eject unit. The toner developer motor transmits drive to the toner developers. Four cam motors in the toner developer selector/paper eject unit mov e the toner develop er to their development position. The MP tray paper feed motor in the paper feed unit is the stepping motor and feeds the paper in the multi-purpose tray.

The paper feed unit, laser scanning unit, toner developers, fuser unit and toner developer selector/paper eject unit are designed for easy removal from the printer for ea sy maintenance.

Print Process

The laser printer creates an image on paper using a technique called laser electrophotography. The printer uses the electrog raphic process known as t he disc harged are a deve lopment, or write bla ck. In this process, a digitally modulated laser scans laterally across a rotating OPC belt that has been negatively charged. Wherever the belt is exposed by the laser beam, the image is written and toner is transferred.

To generate a color image, the OPC belt must complete four rotations, one for each primary color and black. During each successive pass, the laser exposes the portions of belt that correspond to the primary color’s component of the image. Toner is attracted to the laser-exposed portions of the belt.

As each color layer is developed on the OPC belt, they are transferred to the accumulator belt until all four color layers eventually reside one on top of the o ther on the accumulator belt . At this point, a sheet of pap er is advanced under the accumulator belt and the toner is transferred to the sheet of paper. The paper advances to the fuser, where heat and pressure permanently bond the toner to the paper. From the fuser, the paper is driven to the output tray.

A cleaning blade scrapes residual toner from the OPC belt before the next primary color toner is applied to the belt. This prevents contamination of the next color layer. The cleaning blade is in constant contact with the belt. An accumulator belt cleaner scapes residual toner from the accumulator belt. This preve nts “ghosting” of the next print. The blade only comes in contact with the belt after the accumulated toner layers are transferred to the sheet of paper.

Drive Unit Layo u t

Toner Developer Selector/ Paper-eject Unit

Cam Motor

Laser Scanning Unit (LSU)

Imaging Unit

Main Motor

Paper Feed Unit

MP Tray Paper Feed Motor Paper Feed Motor

Toner Developer Toner Developer

Drive Motor

Fuser Unit

Page 38

Print Process

4. Mechanical Functions

Laser Scanning Unit (LSU)

Multipurpose Tray Pickup Roller

Intermediate Rollers

Pickup Roller

Transfer Roller (+300 V)

Erase Lamp

OPC Belt Cleanning Blade

OPC Belt Cleaner

First Bias Transfer

Roller Accumulator Belt

Registration Rollers

Scorotron Charger

+500 ~ 700 v

Waste Toner

Bin Cleaning Roller

(+500 to 2600, depending on media and humidity)

Second Bias Transfer Roller

OPC Belt

Accumulator Belt Cleanning Blade

On-Off

Supply Roller

Toner Cartridges

Black

Cyan

Magenta

Yellow

Pre-Transfer Lamp

Fuser

Toner Cartridge Selector Cam

Take-up Roller

Heated Roller

Pressure Roller

Each block is explained in the following sections:

1. 4.2.1 Discharge and Charging

2. 4.2.2 Laser Exposure and Scanning

3. 4.2.3 Developing

4. 4.2.4 Toner Transfer to the Accumulator Belt

5. 4.2.5 Paper Pickup

6. 4.2.6 Toner Transfer to Paper

7. 4.2.7 Fusing and Exiting

Page 39

FS-5900C Service Manual

OPC Belt

Laser Beam from LSU

4.2 Print Process

4.2.1 Discharging and Charging

Discharge

The print process begins when the OPC belt passes by the erase lamp. The belt is rotating at 100 mm-per-second for 600 dpi printing or 53 mm-per-second for 1200 dpi printing. The light of the erase lamp, which is a horizontal row of red LEDs, removes random negative charges from the OPC belt. Before pre-exposure, the surface of the belt varies from -500 volts to +50 volts. After pre-exposure, the surface of the belts is 0 to -20 volts. The pre-erase lamp is called the erase lamp since it erases negative charges from the belt.

Charge

The electrostatic potential of the belt is not uniform following discharging. As the belt rotates, it passes a scorotron charger, which bombards the belt with negative charges. The scorotron charger behaves somewhat like a vacuum tube. The grid of the charger, held at a potential of between -450 volts to -600 volts and coupled with the varying voltage potential on any discrete point on the belt’s surface, determines how many electrons can flow from the corona wire onto that point of the belt’ s surface. The corona wire is charged to -5 kilovolts with a constant current of -400µA. The varying electron output from the scorotron, directly based on the varying charge of the belt surface, ensures a uniform negative potential of -440 volts or -590 volts on the belt surface, depending on the selected dot-per-inch printing and ambient temperature.

Erase Lamp

Scorotron Charger

Tungsten Wire

OPC Belt

Grid -450 ~ -600v

-5kv

4.2.2 Laser Exposure and Scanning

Laser Exposure

As the OPC belt rotates, the uniformly charged belt is exposed by the modulated laser beam. The verticallymoving belt passes in front of the horizontall y scanning laser beam, and negative charges on the belt surface are neutralized by the beam. This forms a latent image.

Laser output power is either 0.26 mW or 0.33 mW, depending on whether the printer is printing in 1200 dots per inch (dpi) mode or 600 dpi mode. The laser exposure, the negative potential on the belt varies from -440 volts or -590 volts (unexposed) to -10 or -20 volts (fully exposed).

Page 40

4. Mechanical Functions

Laser Scanning

A laser diode generates the laser beam, and lenses and mirrors in the laser scanner direct the beam at the photoconductive belt. The beam is made parallel by the collimator lens and is directed at the rotating polygonal mirror. The mirror rotates at a constant 25,197 revolutions per minute. This transforms the beam into a horizontally scanning beam, which is directed through the f-θ primary lens, altering the beam’s angular rotation motion into a constant horizontal motion. The toric correction lens corrects the beam for any vertical misregistration. Next, the beam reflects off of a mirror and passes through a window where it scans across the rotating photoconductive belt. At the beginning of e ach horizontal sweep, the horizon tal sync mirror deflects the laser beam to the horizontal sync sensor. This informs the engine control board that the laser beam is beginning its horizontal sweep and that it can begin to modulate the signal with the data to be printed on that line of the image.

Laser Diode

Collimator Lens

Horizontal-Sync Mirror

Polygon Mirror

Fθ Lens

Horizontal-Sync Sensor

Mirror

Fθ Lens

Page 41

FS-5900C Service Manual

4.2.3 Developing

Developing

As the OPC belt co nti nue s t o ro ta te, i t pa sse s b y the fou r toner developers. Each cartridge is selectively camdriven forward to bring its developer roller into direct contact with the belt at the appropriate time.

The currently activated toner developer’s developer roller is charged to a potential between -120 to -260 volts. Toner is attracted to the exposed portions of the belt in reverse proportion to the negative charge. The greatest amount of toner is transferred to the most positive potential. The developer roller rotates at 1.8 (600 dpi printi ng) or 2.13 (1200 dpi printing) times the speed of the OPC belt to ensure a constant supply of toner.

OPC Belt

Developer Roller

(-120 to -260v)

Doctor Blade

Supply Roller

Paddles

Black

Cyan

Magenta

As the belt advances, it passes the pre-transfer lamp,

Yellow

which, like the discharge lamp, removes remaining negative charges from the unexposed portions of the belt.

Inside each toner developer is a toner supply roller that rotates in the opposite direction from the developer roller. This supplies a layer of toner onto the developer

Pre-transfer Lamp

Toner Cartridges

Cartridge Selector Cam

roller. The doctor blade smooths and evenly distributes the toner on the developer roller. Gear-driven paddles churn the toner and keep it fluidized and moving towards the developer roller.

Toner Developer Drive

Drive is supplied from the toner developer drive motor. At the proper time, the clutch corresponding with the currently selected toner developer is activated by a signal from the CPU, transmitting drive to the clutch gear via idle gears. Drive is then transmitted to the developer rollers.

The toner level sensing receiver board detects whether each of the four toner developers contains sufficient toner. This board is paired with the toner level sensing transmitter board and functions as the photo sensors.

Toner Developer Drive Motor

Clutch Gear

Developer Roller

Black

Clutch Gear

Developer Roller

Clutch Gear

Developer Roller

Clutch Gear

Developer Ro ller

Cyan

Magenta

Yellow

Toner Developers

Page 42

4.2.4 Toner Transfer to the Accumulator Belt

OPC BeltCleaning Blade

OPC Belt

+500 to 700v

Accumulator Belt Home Sensor

First Bias Transfer Roller

Accumulator Belt

Multipurpose Tray Pickup Roller

Registration Roller

Registration Sensor

Intermediate Rollers

Pickup Rollers

MP Tray Paper Out Sensor

MP Tray Paper Feed Motor

Paper Empty Sensor

Paper Cassette Sensor

Terminal for detecting paper cassette

As the OPC belt rotates, it comes in contact with the accumulator belt, which is rotating at the same speed. Located under the accumulator belt at the contact point with the OPC belt, the first bias transfer roller carries a charge that varies between +500 and +700 volts (based on the sensed temperature, humidity and print speed). This strong potential attracts and holds the toner from the OPC belt to the accumulator belt. The accumulator belt makes four complete rotations, one for each of the four toner layers. The accumulator belt home-position sensor sync signal, generated from a timing mark on the accumulator belt, informs the engine control board when to begin expo sin g t he O P C be lt wi th informati on t o b ui ld the next tone r lay er. At that time, the acc umula tor bel t is rotated to the proper position to transfer the toner layer in proper registration with the previous layer(s).

Any toner remaining on the OP C belt after the transfer to the accumulator belt is scraped off by the OPC belt cleaning blade, which is always in contact with the belt. This leaves the OPC bel t cl ean f or t he next la yer of to ner to be transferred from the toner developers.

4. Mechanical Functions

4.2.5 Paper Pickup

The cam-shaped pickup rollers are driven by the paperfeed motor and force a sheet of pape r between the intermediate rollers. The pickup roller completes only one rotation to pick a sh eet of media . This will push the s heet of paper to the intermediate rollers but does not pick a second sheet. Alternately, depending on the user’s selection, media may be picked from the multi-purpose tr ay. The multi-purpose tray pickup roller is driven by the M.P.T paper feed motor and feeds a sheet of media or an envelope into the registration rollers.

The intermediate rollers advance the sheet of paper to the registration rollers. The paper is driven lightly against the stationary registration rollers to create a slight buckle in the paper, aligning the sheet of paper. At this point, the paper remains stationary (since the registration roller’s clutch is not yet energized) until the image is ready to be printed on the paper. The registration sensor detects whether the sheet of paper arrived at the aligning rollers after being p roperly picked and traveling through the intermediate rollers.

The paper feed unit has the MP tray paper out sensor, paper empty sensor and paper cassette sensor. The MP tray paper out sensor detects whet her the paper i s set on the manual feed tray. The paper empty sensor detects whether the paper is set i n the paper cass ette. The paper cassette sensor detects paper cassette presence and paper size.

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FS-5900C Service Manual

4.2.6 Toner Transfer to Paper

Once all four layers of toner reside up on the accumulator belt, the registration roller clutch is energized to advance a sheet of paper (which has alre ady been picked) to the second bias tra ns fer rolle r. The toner image on the rotating accumulator and the paper that is being fed into the image unit are synchronized for proper alignment. The leading edge of the toner image on the accumulator belt is aligned 5 mm from the leading edge of the paper. A strong positive voltage in the second bias transfer roller attracts the toner from the accumulator belt to the paper. The transfer roller voltage varies from +500 to +2600 volts based on the ambient temperature, humidity, print speed and media being prin ted upon. T he p aper (o r transparency film) advances at the same speed as the accumulator belt.

As the toner is being transferred to the paper, the accumulator belt cleaning blade is activated. This blade scrapes any remaining traces of toner from the accumulator belt prior to the next image transfer. Residual toner is removed from the second bias transfer roller by a cleaning roller that is held at a potential that is +300v higher than the second bias transfer roller. A blade scrapes the toner off the cleaning roller into the toner waste bin.

Second Bias Transfer Roller

Cleaning Roller (+300 V higher than STR)

Accumulator Belt Cleaning Blade

+500 to 2600 V

Waste Toner Bin

4.2.7 Fusing and Exiting

Fusing

After the toner image has been applied to the paper, it passes through the fuser. A heated roller melts the toner and pressure drives it into the paper. The melted toner bonds to the paper. An oil supply keeps the heated roller lubricated so that the melted toner does not adhere to the roller. After fusing, the paper advances to the output tray. When the printer is idle, the heated roller is held at a temperature of 150 °C. The heated roller is set to 156 °C for 600 dpi printing and 137 °C for 1200 dpi printing. For transparency film and other media the fuser is set to 160 °C and ran at h al f speed. The paper ejection s ensor detects the sheet of paper as it leaves the fuser.

Take-Up Roller

Supply Roller

Heated Roller

Fuser Roll

Oil (soaked)

Pressure Roller

Fuser

Page 44

4. Mechanical Functions

Reverser

The reverser allows the prints to exit to the exit tray printed side down

Output Tray Paper Full Sensor

Paper Exit Sensor

Output Tray

Paper Ejection Sensor

Fuser

Switchback Support Roller

Switchback Roller

Switchback Support Roller

Paper ejection roller #1

Switchback Gate

Switchback Roller Shaft

Switchback Solenoid

Paper Path

Eject

If face up eject is selected, the paper goes directly to the output tray unde r the switchback gate, printed side up.

Paper Ejection Sensor

Output Tray Paper Full Sensor

Paper Path

Paper Exit Sensor

Output Tray

Fuser

Or, if face down eject is selected, the switchback solenoid on the toner developer selector/paper eject unit is activated to ho ld th e s w itc hb ac k ga te in th e down position, allowing the paper to be fed to the reverser, which drives the sheet up a narrow channel. At this time, the switchback shaft linked with the switchback gate moves to posi tion A. At the proper time, the switchback solenoid is turned off, which returns the switchback gate to the up position. Also, the switchback shaft moves to position B. These movements reverse direction and routes the sheet of paper to the output tray printed side down. This is appropriate for a collated series of prints that need to remain in first-to-last order. The paper exit sensor detects the sheet of paper as it enters the exit rollers.

Switchback Gate

Position A

Switchback Gate

Switchback Shaft

Paper

Position B

Paper Path

Paper ejection roller #2

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FS-5900C Service Manual

5. Removal and Replacement Procedures

Caution:

The imaging unit (OPC belt and accumulator belt) is extremely light sensitive. Make sure that it is not exposed to li ght fo r more than 45 seconds , or it may da mage t he unit. Ne ver expose the imaging unit to direct sunlight. When servicing the printer, ensure that the imaging unit is not exposed to light. If necessary, remove it and store in a dark place.

5.1 Upper Rear, Lower Rear and Top Covers

1. Remove the upper rear cover (4 screws).

2. Remove the lower rear cover (4 screws).

3. Separate the lower rear cover from the duct tube.

4. Remove the top cover (3 screws).

The front of the top cover is held by metal tabs. Tilt the top cover up from the rear (arrow 1), slide it back slightly (arrow 2), and remove it.

Screw

Fan Cover

Screw

Upper Rear Cover

Top Cover

~ A

I N

Opening on Chassis Frame

Metal Tab

5.2 Left Side Cover and Multi-purpose Tray

1. Remove the upper rear cover and top cover (See sec-

tion 5.1).

2. Open the left side cover.

3. Pull out the paper feed unit.

4. Lower the MP tray.

5. Remove the left side cover while releasing the 4

hooks from the printer f rame.

6. Remove the multi-purpose tray by sliding part A in

the direction indicated by the arrow.

Screw

Board

Fan Cover

Left Side Cover

Part A

Multi-purpose Tray

Paper Feed Unit

Duct tube Humidity

Sensor Case

Lower Rear Cover

Hook

Left Side Cover

Page 46

7. Turn the bushing 90 degrees counterclockwise.

Tab

Bushing

Rack

Paper Support

Rack

Pinion Gear

Operation Panel Cove r

Screw

Connector

Screws Earth Lead

Board

8. Remove the 2 bushings.

9. Separate the paper support assembly from the

holder.

10.Remove the pinion gear and racks (3 screws).

5. Removal and Replacement Procedures

Turn the bushing 90 degrees clockwis e or counterclockwise.

5.3 Operation Panel Cover and Printer LCD Board

1. Remove the upper rear cover and top cover (See

section 5.1).

2. If the imaging unit is installed, remove it.

3. Open the front cover and remove the operation

panel cover assembly (3 screws).

4. Remove the 1 earth lead wires (1 screws).

5. Disconnect the connector.

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FS-5900C Service Manual

6. Remove the LCD board bracket (4

screws).

7. Remove the LCD board (6 screws).

8. Remove the operation button from the

operation panel cover.

9. Remove the lower operation panel cover

(2 screws).

Lower Operation Panel Cover

Ground Wire

LCD Board

Operation Button

Operation Panel Cover

Screw

5.4 Safety Interlock Switches and Toner Empty Sensor Board (T)

1. Remove the upper rear cover, top cover and operation panel cover (See section 5.1 and 5.3).

2. Remove the 3 screws and disconnect the connector on the toner empty sensor board.

3. Remove the toner empty sensor board.

4. Disconnect the 2 connectors from each of the 2 safety interlock switches.

5. Remove the 2 screws from each of the 2 safety interlock switches.

6. Remove the screw from each of the switch levers and switch lever.

Connector

Screw

Toner Empty Sensor Board

Screw

Switch Lever

Safety Interlock Switch

Screw

Connector

Screw

Connector

Switch Lever

Screws

Connector

Screw

Safety Inter lo c k Switch

Page 48

5. Removal and Replacement Procedures

Parts C

5.5 Front Cover and Bottom Front Cover

1. Open the front cover.

2. Remove the bottom front cover (3 screws).

3. Remove the front cover with hinges [4 screws (A)].

4. Remove the hinge assemblies from the front cover [4 screws (B)].

5. Remove the E-rings f rom the hinge shafts. The front cover hinges can now be separated from the front

cover hinge supporters.

Note:

E-ring

Hinge Shaft

E-ring

Screw (A)

E-ring

Hinge Shaft

E-ring

Screw (A)

Front Cover Hinge

Screw (B)

Front Cover Hinge Supporter

Screw (B)

Front Cover Hinge Supporter

Front Cover

The bottom front cover is latched by metal tabs (Parts C below). When removing or reinstalling this cover, it must be released from the tabs or latched with the tabs.

Screw

Bottom Front Cover

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FS-5900C Service Manual

5.6 Front Right Side, Rear Right Side and Lower Right Side Covers

1. Remove the bottom front cover (See section 5.5).

2. Remove the paper exit tray.

3. Remove the front right side cover (2 screws).

4. Remove the rear right side cover (2 screws).

5. Remove the lower right side cover (2 screws).

Rear Right Side Cover

Screw

Screws

Front Right Side Cover

Note:

The lower right side cover is latched by metal tabs (Parts A below). When removing or reinstalling this cover, it must be released from the tabs or latched with the tabs.

Lower Right Side Cover

Screws

Paper Exit Tray

Parts A

Page 50

5.7 Left Side Cover

Left Side Cover

5.7.1 Left Side Cover Removal

1. Open the left side cover.

2. Remove the black strap by releasing the hooks.

3. Remove the left side cover by sliding it in the direc-

tion of arrows 1, 2.

5. Removal and Replacement Procedures

Hook

Strap

Hook

Left Side Cover

Spring

5.7.2 Left Side Cover Sub Assembly

1. Remove the tray cover by sliding it in direction of arrow while slightly deflecting part (A) of left side

cover in the direction of arrow. Release the tray cover from the tab on the left side cover as shown in circle A below.

2. Remove the paper chute (2 screws).

3. Remove the tray cover lever (1 screw).

4. Remove the 2 E-rings and 2 door hooks.

5. Remove the left side cover shaft and shaft spring by pulling out the door shaft.

When reinstalling the tray cover and the tray spring,

Tray SpringTray Cover

AAAA

Tray Cover Lever

Left Side Cover

Tab

E-ring

install the spring as shown below.

Tray Cover Tray Spring

Tray Cover

Part (A)

E-ring

Left Side Cover Shaft

Door Hook

Paper Chute

Door Hook Shaft Spring

Screw

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FS-5900C Service Manual

5.8 Printer Main Control Board, HSYNC Board and Network Relay Board

5.8.1 Printer Main Board Removal

1. Remove the cable cover (2 screws).

2. Disconnect the connector by pulling the tab.

3. Remove the 2 screws, then pull out the printer main

board.

Note:

When replacing the printer main board, the current EEPROM (IC9) must be installed on the new board. If the EEPROM is damaged, the color density calibration must be reset. Refer to section

7.2.

Screws

Pull out

Printer Main Control Board

5.8.2 Printer Main Control Board Disassembly , HSYNC Board and Network Relay

Board

1. Remove the 3 screws from the connectors.

2. Separate the main board bracket from the printer main control board.

Main Control Board

Main Board Bracket

Screw

Screws

Page 52

5. Removal and Replacement Procedures

Screw

Green Handle

Screw

Tabs

Square Opening

Paper Feed Unit Cover

5.9 Paper Feed Unit

5.9.1 Paper Feed Unit Removal

1. Open the left side cover to access the paper feed unit.

2. Slide out the paper feed until it stops.

3. Push in on the tw o green tabs to unlock the paper

chute. Lift the paper chute until it catches, in the open position.

4. Rotate the green handles on the transfer roller. Lift

out the transfer roller/waste bin (consumable) to avoid toner spillage.

5. Remove the 2 screws.

6. Slide the paper feed unit off the rails.

5.9.2 Paper Feed Unit Board and MP Tray Paper Out/Registration Sensor Board

1. Remove the screw from t he paper feed unit

cover.

2. Remove the paper feed unit cover while releas-

ing the 3 hooks.

3. Remove the paper feed unit board (1 screw).

Registration Roller Clutch

Connector

3 Hooks

4. Disconnect the 4 connectors on the paper feed

Note:

unit board.

When reinstalling the paper feed unit cover, the tabs of the registration roller clutch must be aligned with the square opening.

Paper Feed Unit Board

Paper Feed Unit Cover Screw

Screws

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FS-5900C Service Manual

5. Remove the s e nsor case with the sensors after releas-

ing the 5 hooks in order screwdriver below.

Flat Blade Screwdriver

The MP tray paper out sensor, registration sensor and MP tray Paper Out/reg. Sensor Board can now be removed from the sensor case by releasing it from the hooks.

1 to 5 using a flat blade

Opening of Sensor Cover

Sensor Cover

Hook

Sensor Case

Sensor Board

Connector

Registration Sensor Arm

MP Tray Paper Out Sensor Arm

5.9.3 Transfer Roller Clutch, Transfer Roller Holder, Cleanin g Roller Holder and

Registration Roller

1. Pivot the paper chute to an upright position.

2. Lift and remove the paper chute.

Bushing

Paper Chute

Bushing

Page 54

5. Removal and Replacement Procedures

3. Remove the 3 E-rings and 2 springs from

the transfer roller cam shaft.

4. Remove the clutch, 2 bushings and

transfer roller cam shaft.

5. Remove the E-ring and gear from the

transfer roller holder shaft.

6. Remove the 2 E-rings, then slide out the

transfer roller holder shaft. The right and left transfer holders can be removed.

Transfer Roller Cam Shaft

E-ring

Bushing

Spring

Transfer Roller Holder

E-ring

Bushing

E-ring

Pickup Rollet

Clutch

E-ring

Pickup Rollet

7. Release the 2 springs from the spring

studs (located on back side of the paper feed unit).

8. Rotate the cleaning roller holder up.

9. Lift and remove the cleaning roller

holder. The cleaning pressure roller and 2 bushings can be removed from the holder.

Spring

Pull up

Cleaning Roller Holder

Stud

Gear

Pickup Rollet

Transfer Roller Holder Shaft

E-ring

Pull up

Direction of Rotation

Spring

Page 55

FS-5900C Service Manual

10.Remove the 2 springs and the plastic

clip.

11.Move the upper registration roller to the

right and remove.

12.Remove the 4 E-rings, 2 bushings and

registration roller clutch.

13.Remove the lower registration roller.

Upper Registration Roller

E-ring

Springs

Plastic Clip

Bushing

E-rings

Bushing

5.9.4 MP Tray Retard Pad

Open the MP tray chute assembly with the retard pad by sliding it in the direction o f arrow A.

Remove the retard pad by releasing the hooks.

Lower Registration Roller

Arrow A

Registration Roller Clutch

MP Tray Chute Assembly

Spring

E-ring

Hook

MP Tray Chute Assembly

Retard Pad

Page 56

5. Removal and Replacement Procedures

Hook

MP Tray Pickup Roller

Pickup Roller Guide

5.9.5 MP Tray Motor, MP Tray Pickup Roller and MP Tray Pickup Roller Shaft

Note:

When reinstalling the pickup roller and cam to the MP tray pickup roller shaft, the rubber side of the MP tray pickup roller, cams and STR sensor arm must be positioned as shown below.

Cams

5.9.5.1 MP Tray Pickup Roller

Release the hook of the pickup roller guide roller

from the MP tray pickup roller shaft.

2. Remove the E-ring and slide the pickup guide

roller in the direction indicated by the arrow.

Pickup Roller Rubber

STR Sensor Arm

3. Remove the MP tray pickup roller.

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FS-5900C Service Manual

5.9.5.2

Remove the motor bracket with the motor (2

screws).

MP Tray

Motor and

MP Tray

Pickup Roller Shaft

2. Remove the 2 gears and STR sensor arm after

releasing the hooks.

3. Remove the 3 E-rings and 2 bushings from the

shaft.

4. Release the hooks of the pickup roller guide roll-

ers.

5. Move the pickup roller guide rollers and MP tray

pickup roller in the direction of the arrow.

E-ring

STR Sensor Arm

Bushing

Screw

Gears

Screw

Bracket

E-ring

Bushing

6. Remove the MP tray pickup roller shaft assembly

by sliding it in the order of the arrows (If necessary, remove the M.P.T pickup roller.)

1 to 2.

E-ring

Pickup Roller Guide Rollers and Pickup Roller

MP Tray Pickup Roller Shaft

Page 58

5. Removal and Replacement Procedures

5.9.6 Pickup Roller, Pickup Roller Shaft Assembly and Paper Empty Sensor Arm

Note:

When reinstalling the pickup roller to the pickup roller shaft assembly with the clutch, the rubber side of both pickup rollers, the pawl on the clutch, and part A of the pickup roller shaft must be positioned as shown below.

Pawl

1. Place the unit face down.

2. Remove the E-ring, then remove the pickup

roller by sliding it in the direction of the arrow.

Pickup Roller Rubber

Part A (D-shape)

E-ring

3. Remove the E-ring and pickup roller shaft

assembly. If necessary, remove the pickup rollers.

4. Remove the paper empty sensor arm.

Paper Empty Sensor Arm

Pickup Roller Shaft A ssemb ly with Pickup Rollers

Pickup Rollers

Bushing

E-ring

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FS-5900C Service Manual

5.9.7 Paper Feed Roller and Paper Feed Unit Frame

Remove the following parts: a. Paper Feed Unit Cover, Paper Feed Unit Board, Sensor Case (See section 5.9.2): b. Transfer Roller Cam Shaft, Transfer Roller Holder Shaft, Cleaning

Roller Holder and Registration Roller (See section 5.9.3):

c. MP tray Motor and MP tray Pickup Roller Shaft (See section 5.9.5): d. Pickup Roller Shaft and Paper Empty Sensor Arm (See section 5.9.6):

1. Remove the E-ring and gear from the

gear shaft.

E-ring

2. Remove the 3 E-rings, gear and 2 bush-

ings from the paper feed roller shaft.

3. Remove the 4 screws from the paper feed

unit frame.

4. Remove the paper feed unit frame from

the paper feed unit base.

5. Remove the paper feed rolle r from the

paper feed unit base.

6. Remove the spring and MP tray chute assem-

bly.

Bushing Paper Feed Unit Base

Gear Shaft

Roller Shaft

Spring

Paper Feed Unit Frame

Gear

E-ring

Bushing

Gear

Screws

Paper Feed Roller

MP Tray Chute Assembly

E-rings

7. Remove the 2 springs from the MP tray chute

assembly.

8. Remove the pinch roller assembly while dis-

torting the area (A) of the MP tra y Chute using the (-) driver.

Spring

MP Tray Chute Asse mbly

Area (A)

Pinch Roller Assembly

(–) Driver

Page 60

5. Removal and Replacement Procedures

E-rings

Connector

90 to 130 mm

Toner Developer Selector/Paper-eject Unit

Spring

Spring Stoppers

Spring

E-ring

Bushing

E-ring

Bushing

Support Shaft

5.10 Tone r Developer Selector/Paper-eject Unit

5.10.1 Toner Developer Selector/Paper-eject Unit Removal

1. Remove the paper exit tray, front right side cover,

lower right side cover, rear right side cover, bottom front cover (See section 5.5 and 5.6).

2. Remove the 4 E-rings and disconnect the connector.

3. To relive spring tension open the toner developer

selector/paper-eject unit.

4. Slide the spring stoppers and springs in the direction

of the arrows to unlatch the springs from the printer frame.

5. Close the unit.

6. Remove the 2 E-rings and 2 bushings.

7. Slide the support shaft to the right or left, and

remove the unit.

Note:

When reinstalling the toner developer selector/ paper-eject unit, remove the solenoid side cover and motor side cover from the unit (See section

5.10.2.1). Reinstall the unit on the printer by per-

forming the procedure in reverse order.

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FS-5900C Service Manual

5.10.2 Covers, Sensor Boards (Paper Ejection, Paper Exit, Paper Tray Full) and

Paper Ejection Roller

5.10.2.1 Covers

Remove the spring stopper (right side) and spring (right side).

2. Remove the 12 screws from the motor side cover, solenoid side cover and unit inner cover.

3. Remove the covers, spring stopper (left side) and spring (left side) .

Screw Screw

Unit Inner Cover

Spring Stopper (right side)

Screw

Spring Stopper (left side)

Spring (left side)

Solenoid Side Cover

Spring (right side)

ScrewsMotor Side Cover

4. Remove the unit cover (4 screws).

5. Release the 2 springs from the chassis frames and screw (A), then remove the unit face down cover and

paper tray full sensor arm.

Screw (A)

Spring

Unit Face Down Cover

Note:

Before reinstalling the unit cover, the unit face down cover should be installed.

Unit Cover

Screws

Plastic Wash er

Paper Tray Full Sensor Arm

Screw

Page 62

5. Removal and Replacement Procedures

5.10.2.2 Sensor Boards (Paper Ejection, Paper Exit, Paper Tray Full) and Paper Ejection Roller

Sensor Boards (Paper Ejection, Paper Exit, Paper Tray Full)

Disconnect the connector on the paper tray full sensor board.

2. Remove the paper tray ful l sensor board (1 screw).

3. Remove the 2 screws from the paper exit sensor board.

4. Disconnect the 3 connecto rs on t he pa per exit sens or boar d. The paper ex i t sensor b oar d can now be sep-

arated from the toner developer selector/paper-eject unit.

5. Remove the paper ejection sensor board (1 screw).

Paper Exit Sensor Board

Connector

Screws

Paper Ejection Roller

Remove the 2 E-rings and 2 bushings from the paper ejection roller.

2. Remove the paper ejection roller.

Paper Tray Full Sensor Board

Connectors

Paper Ejection Roller

Page 63

FS-5900C Service Manual

5.10.3 Cam Motor Board, Toner Developer Movement Sensor Board and Toner Selector Cam

1. Remove the motor side cover, solenoid side cover and

unit inner cover (See section 5.10.2.1).

2. Disconnect the 2 connectors, then remove the 3

screws from cam motor bracket.

3. Remove the cam motor bracket with the boards.

Connectors

4. Remove the 8 screws from the bracket and 2

screws from the cam motor board.

5. Remove the cam motor board with the motors.

6. Remove the 4 nuts from the 4 cam shafts, then

pull out the 4 cam shafts.

7. Remove the 4 cam gears.

8. Remove the toner developer movement sensor

board (3 screws).

9. Remove the 3 E-rings, gear, plastic

washer and 2 bushings from each shaft. The toner selector cam and toner selector shaft can now be removed.

Cam Motor Bracket with board

Nut

Cam Gear

Cam Shaft

Cam Motor Boar d

E-ring

8 Screws

Screw

Cam Motor Bracket

Screw

Toner Developer Movement Sensor Board

Screws

Bushing

Toner Selector Cam

Spring Pin

Bushing

Gear

E-ring

Page 64

5. Removal and Replacement Procedures

Selector Cam

Shaft

Short Groove

Selector Cam Gear

Long Groove

Solenoid

Embossments

Direction of Stroke

Note: When reinstalling the toner selector cam and

toner selector cam gear, make sure that the direction of the pin grooves for the cam and gear are the same.

5.10.4 Joint Gear and Face Down Switch Back Solenoid

Note: When reinstalling the solenoid, fit the 2 holes of

the solenoid to the positioning embossments, then tighten the screws while pressing the solenoid to the arrow direction. This allows minimum stroke of the solenoid plunger.

1. Remove the motor side cover, solenoid side cover and unit inner cover (See section 5.10.2.1).

2. Remove the E-rings and spring.

3. Remove the joint gear.

4. Remove the 2 screws and face down switch back solenoid.

5. Disconnect the connector on the ADU Jam D sensor board.

Screws

Face Down Switch Back Solenoid

Spring

Joint Gear

Joint Gear Bracket

Gear

E-rings

6. Remove the 2 screws that secure the ADF gate solenoid.

7. Disconnect the connector on the paper tray full sensor board.

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FS-5900C Service Manual

5.10.5 Switch Back Shaft, Switch Back Roller and Face Down Switch Gate

1. Remove the motor side cover, solenoid side cover and unit inner cover (See section 5.10.2.1).

2. Remove the paper ejecti on roller (See sec t ion 5.10.2.2).

3. Remove the cam motor bracket with board and toner selector cam (See section 5.10.3).

4. Remove the cable bracket (2 screws).

5. Remove the E-ring from the switch back shaft.

6. Pull out the switch back shaft.

E-ring

Cable Bracket

Switch Back Shaft

Pull Out

Switch Back Shaft

7. Remove the joint gear and face down switch back solenoid (See section 5.10.4).

8. Remove the spring, plastic ring and switch back arm.

9. Remove the ADU Gate arm.

10.Remove the 4 E-rings, pin, 2 gears and 2 bushings from the right side chassis frame.

11.Remove the 2 E-rings and 2 bushings from the left side chassis frame.

Bushings

Plastic Ring

Screws

Bushing

E-rings

Spring

Switch Back Arm

E-ring

Bushing

Gear

E-ringE-ring

Gear

Page 66

5. Removal and Replacement Procedures

12.Remove the screw from the paper ejection guide.

13.Slide the paper ejection guide out in the direction of the arrow.

14.Remove the rear frame (2 screws).

15.Remove the 9 screws and 4 E-rings and release the hooks on the frame (A).

16.The switch back roller, face down switch back gate, all chassis frames, etc. can now be separated.

Upper Paper Ejection Guide

Screws

Rear Frame

Screws

E-ring

E-rings

Shafts

E-ring

Frame (A)

E-ring

Screws

Page 67

FS-5900C Service Manual

5.11 Engine Control Board Shield Cover

1. Remove the upper rear cover and top cover. (See section 5.1)

2. Remove the flat cable cover (2 screws).

3. Remove the FG plate (6 screws).

4. Remove the flat cable by disconnecting the cable connectors.

5. Remove 12 screws and the engine control board shield cover.

Screws

Engine Control Board Shield Cover

Screw

Fan Cover

Access Panel (ROM)

Screw

FG Plate

Screw

Note:

When replacing the ROM only, remove the access panel only (3 screws), then replace the ROM.

5.12 Laser Scanning Unit (LSU)

1. Remove the upper rear, lower rear and top covers (See section 5.1).

2. Remove the engine control board shield cover (See section 5.8).

3. Remove the shield cover of the polygen motor (2screw).

4. Disconnect the flat cable.

5. Disconnect the 3 connectors from the LSU.

6. Disconnect the connector CN4 on the engine control board and cut the tie.

7. Remove the LSU (3 screws).

Connector

Screw

Screws

Connector CN4

Laser Scanning Unit (LSU)

Page 68

5.13 Power Supply Unit

5.13.1 Power Supply Unit Removal

1. Remove the upper rear cov er and top cover ( See

section 5.1).

2. Remove the engine control board shield cover

and cable cover (See section 5.11).

3. Disconnect the 4 connectors on the power sup-

ply unit and 1 connector (CN30) on the engine control board.

4. The power supply unit is latched by a metal

tab. Lift the power supply as shown by arrows

1 and 2 and remove.

Connectors

Power Supply Unit

5. Removal and Replacement Procedures

Metal Tab

5.13.2 Power Supply Unit Sub Assembly

1. Remove the upper shield cover with fan

(7 screws).

2. Remove the lower shield plate from the

power supply board (6 screws).

Lower Shield Cover

Screw

Connectors

Power Supply Board

Screw

Fan

Screws

Upper Shield Cover

Page 69

FS-5900C Service Manual

5.14 Engine Control Board

When replacing the engine control board, the top and the left calibration adjustment are needed. Refer to Section 8.

1. Remove the upper rear cover and top cover

(See section 5.1).

2. Remove the engine control board shield

cover (See section 5.11).

3. Disconnect all connectors on the engine con-

trol board.

4. Remove the engine control board (6 screws).

Screws

Screw

Engine Control Board

5.15 Fuser/Toner Developer Fan Motor and Ozone Fan Motor

1. Remove the upper rear cover and top cover (See section 5.1).

2. Remove the engine control board shield cover (See section 5.11).

3. Disconnect CN24 on the engine control board.

4. Remove the fuser/toner developer fan motor (2 screws).

5. Disconnect CN23 on the engine control board, and open the clamper.

6. Remove the 2 screws from the fuser/toner developer fan motor bracket.

7. Remove the fuser/toner developer fan motor bracket while releasing the cables from the bracket.

8. Disconnect CN9 and CN12 on the engine control board.

9. Remove the 2 screws and the ozone fan motor.

10.Remove the 2 screws from the ozone fan motor bracket.

11.Remove the duct tube from the fan housing.

12.Remove the ozone fan motor bracket while releasing the cables from the bracket.

Bracket

Screw Fuser/Toner Developer Fan Motor

Screws

Ozone Fan Motor

Screw

Bracket

Screw

Page 70

5. Removal and Replacement Procedures

5.16 Main Motor, Paper Feed Motor and Left Side Cover Switch

1. Remove the upper rear cover and top cover

(See section 5.1).

2. Remove the engine control board shield

cover (See section 5.11).

3. Disconnect CN15 on the engine control

board.

4. Remove the main motor (4 screws).

5. Remove the lower rear cover (4 screws).

6. Disconnect CN22 on the engine control

board.

7. Remove the paper feed motor (4 screws).

8. Remove the left side cover switch cover by

releasing the hooks.

Lower Rear Cover

Paper Feed Motor

9. Remove the left side cover switch with the

cable (1 screw).

10.Disconnect the connector CN3 on the engine

control board.

Screws

Duct Tube

Screws

Main Motor

Left Side Cover Switch

Switch Cover

5.17 Transfer Roller Bias Terminal, FTR Bias Terminal, Home Sensor Board and Fuser Joint Connector

1. Remove the upper rear cover and top cover (See section 5.1).

2. Remove the engine control board shield cover (See section 5.11).

3. Remove the FTR bias terminal unit (2 screws).

4. Disconnect the cable from the FTR bias terminal.

5. Slide out the paper feed unit.

6. Remove the 8 screws that secure the cover plate.

7. Disconnect the cable from the transfer roller bias terminal.

8. Remove the 2 screws. The transfer roller bias terminal is disassembled and can be removed from the

chassis frame.

9. Disconnect CN13 on the engine control board.

10.Remove the home sensor case with home sensor board (2 screws).

FTR Bias Terminal Unit

Screws

Home Sensor Case with Home Sensor

Screw

Cover Plate

Transfer Roller Terminal

Paper Feed Unit

Page 71

FS-5900C Service Manual

5.18 IT Cleaning Solenoid Board and Toner Developer Drive Motor/ Toner Developer Drive Unit

5.18.1 Removal (IT Cleaning Solenoid Bo ard and Toner Developer Dr ive Motor/

Toner Developer Drive Unit)

1. Remove the upper rear cover and top cover (See

section 5.1).

2. Remove the engine control board shield cover

(See section 5.11).

3. Remove the power supply unit (Se e section

5.13.1).

4. Disconnect all connectors on the engine control

board and release the clampers, clamping the cables.

5. Remove the engine control board with the

bracket (4 screws).

6. Remove the IT cleaning solenoid board with the

bracket (2 screws).

Toner Developer Drive Motor

Screws

Screw

7. Remove the toner developer drive motor (4

screws).

8. Disconnect the connector from the developer

bias terminal.

9. Remove the toner developer drive unit (10

screws).

Engine Control Board with bracket

Screws

Bias Cable Connector

IT Cleaning Solenoid

Screws

Toner Developer Drive Unit

Board

Page 72

5. Removal and Replacement Procedures

5.18.2 Toner Developer Drive Unit Sub Assembly

1. Disconnect the 4 connectors.

2. Remove 4 E-rings, 4 gears and 4 pins from the clutches.

3. Remove 4 E-rings from clutches, then 4 bushings.

4. Remove the 2 screws from the clutch bracket.

5. Separate the clutch bracket with the clutches from the drive unit.

6. The clutch can now be removed from the clutch bracket by removing the E-ring and cutting the cable tie.

Connectors

Black Lead Wire

Screw

Bushing × 4

E-ring × 4

Cable Tie

Red Lead Wire

Clutch × 4

Clutch BracketScrew

Blue Lead Wire

7. Remove the 6 screws from the drive unit.

8. Separate the drive unit bracket from the drive unit case.

E-ring × 4

Gear × 4

E-ring × 4

Bushing × 4Yellow Lead Wire

Pin × 4

Drive Unit Bracket

Screws

Drive Unit Case

Page 73

FS-5900C Service Manual

9. Remove the E-ring from each of 6 gear shafts.

10.Each of gear can now be removed from the drive unit bracket.

E-ring

Gear

E-rings

Gears

E-ring

Drive Unit Bracket

Gear

11.Remove the toner sensor bracket with the toner sensor board (4 screws).

12.Remove the toner sensor boar d from the bracket (3 screws) .

13.Remove the developer bias, bias plate and washers (5 screws).

Drive Unit Case

E-ring

Gear

Toner Sensor Bracket

Screws

Screw

Toner Sensor Board

Screw

Screws

Washer

Bias Plate

Washer

Developer Bias Terminal

Page 74

5. Removal and Replacement Procedures

5.19 Printer Main Control Board Holder, Printer Panel Relay Board and High Voltage Board

1. Remove the upper rear cover and top cover (See section 5.1).

2. Remove the engine control board shield cover (See section 5.11).

3. Open the left side cover, then slide out the paper feed unit.

4. Remove the left side cover and multi-purpose tray (See section 5.2).

5. Remove the main control board (See section 5.8.1).

6. Remove the access plate from the printer main control board holder (3 screws).

7. Remove the cable fi xing plate (2 screws).

8. Disconnect the flat cable from the printer panel relay board.

9. Remove the 5 screws, then slide out the printer main control board holder from the printer.

Cable Fixing Plate

Printer Panel Relay Board

Screws

Flat Cable

Slide Out

Printer Main Control Board Holder

10.Remove 15 screws, then separate the board

holder cover from the board holder base.

11.Remove the printer panel relay board (2

screws).

12.Remove the retainer (2 screws).

13.Disconnect the 4 connectors on the high voltage

board.

Board Holder Base

Board Holder Cover

5 Screws

Screw

Access Plate

Retainers

Printer Panel Relay Board

Screws

Screw

14.Remove the high voltage board (4 screws).

High Voltage Board

Screw

Connectors

Connector

Page 75

FS-5900C Service Manual

5.20 IT Belt Cleaning Drive Gears, Cleaning Clutch Shaft Assembly, Main Motor Bracket, Imaging Unit Coupling Connector , Fuser Coupling Connector and Optional 2nd Feeder Coupling Connector

When removing the fuser coupling and o ptional 2nd fe ede r couplin g connect ors, the follow ing part s must be removed.

• Upper rear cover and top cover (See section 5.1)

• Engine control board shield cover and cable cover (See section 5. 11)

A. Fuser Coupling Connector

1. Disconnect the connector CN204 on the power supply unit connector CN25 on the engine control board.

2. Remove the Fuser Coupling Connector (2 screws).

B. Optional 2nd Feeder Coupling Connector

1. Disconnect the connector CN19 on the engine control board.

2. Remove the Optional 2nd Feeder Coupling Conector (2 screws).

When removing the imaging unit coupling connector, IT belt Cleaning drive gears, cleaning clutch shaft assembly and main motor bracket, further the following parts must be removed.

• Engine control board with bracket and toner developer drive (See section 5.18.1)

C. Imaging Unit Coupling Connector

1. Remove the imaging unit coupling connectors (4 screws).

2. Remove the coupling connector from the bracket (2 screws).

D. IT Belt Cleaning Drive Gears

Remove the E-ring from each of IT belt cleaning drive gears and gear.

E. Cleaning Clutch Shaft Assembly

1. Open the front cover.

2. Remove the E-ring and bushing from the cleaning clutch shaft assembly.

3. Remove the cleaning clutch shaft assembly from the printer.

F. M a in M o tor B r ac ke t

Open the front cover.

2. Remove the main motor bracket with the motor (4 screws).

Imaging Unit Coupling Connector

Connector Bracket

IT Belt Cleaning Drive Gea rs

Fuser Coupling Connector

Cleaning Clutch Shaft Assemb ly

Screw

E-rings

Screw

Bushing

E-ring

Screws

4 Screws for main motor bracket

2nd Feeder Coupling Connector

Main Motor Bracket with motor

Page 76

5.21 Cassette Detection Sensor Board

Screws

Cassette Dete ction Sensor Board

Left Side Cover

Cassette Dete ction Sensor Board Cover

1. Open the left side cover, then remove the paper

feed unit (See section 5.9.1).

2. If necessary, remove the left side cover (See sec-

tion 5.7.1).

3. Remove the cassette detection sensor board cove r

(2 screws).

4. Disconnect the connector CN634 on the sensor

board.

5. Remove the cassette detection sensor b oard.

5. Removal and Replacement Procedures

5.22 Pre-Exposure Eraser and Pre-Transfer Boards

Pre-Exposure Eraser Board

Open the front cover.

2. Remove the screw A.

3. Disconnect the connector on the eraser board.

4. Remove the eraser board with eraser board cover.

5. Remove the 2 screws from th e board.

6. The eraser board can now be removed from the cover.

Pre-Transfer Board

Open the front cover.

2. Remove the screw B.

3. Disconnect the connector on the pre-transfer board.

4. Remove the pre-transfer board with pre-transfer board cover.

5. Remove the 2 screws from th e board.

6. The pre-transfer board can now be removed from the cover.

Eraser Board Cover

Eraser Board

Screw A

Pre-Transfer Board Cover

Screws

Screw B

Connector

Screw

Pre-transfer B o ar d

Page 77

FS-5900C Service Manual

5.23 Pre-Transfer Board Bracket and Toner Developer Guide Rails

Remove the following parts.

• Upper Rear and Top Covers (See section 5.1 )

• Engine Control Board Shield Cover and Cable Cover (See section 5.11)

• Engine Control Board with Bracket and IT Cleaning Solenoid Board (See section 5.18.1)

• Power Supply Unit (See section 5.13.1)

5.23.1 Pre-transfer Board Bracket

1. Open the toner developer selector/paper-eject unit and front cover.

2. Remove the 4 screws and pre-transfer board bracket support plate with the board bracket.

3. Remove the 2 screws, then separate the pre-transfer board bracket from the support plate.

4. Remove the 2 screws and pre-transfer board from the board cover.

See Section 5.2 2

Screws

Pre-Transfer B o ar d Br acket Support

Screw

Board Cover

Pre-Transfer Board Cover Pre-Transfer Board Bracket

Screws

Screw

Page 78

5. Removal and Replacement Procedures

5.23.2 Toner Developer Guide Rails

1. Remove the pre-transfer board bracket support plate with the board bracket.

2. Remove the upper rear cover side toner developer guide rail (6 screws). See figure B below.

3. Remove the operation panel cover (See section 5.3).

4. Remove the toner empty sensor board (See section 5.4).

5. Remove the front cover side guide rail (7 screws). See figure A below.

Figure B

Figure A Figure B

Toner Developer Guide Ra il (Front cover side)

Figure A

Toner Developer Guide Rail (Upper rear cover side)

Screws

Screw

Page 79

FS-5900C Service Manual

5.24 Cassette Guide, Fuser Guide Frame and Fuser/Paper Feed Unit Drive Gears

1. Open the front cover.

2. Remove the botton Front cover (3 screws).

3. Remove the support plate (2 screws).

4. Remove the fuser guide plate (3 screws).

Screw

Fuser Guide

Screw

Support Plate

Screw

5. Remove the paper feed unit (See section 5.9.1).

6. Remove the 2 screws for each cassette guides from the bottom chassis.

7. Remove the cassette guide.

Cassette Guide

Bottom Chassis Frame

Screw

Screws

8. Remove the gear fixing plate (3 screws).

9. All gears and plastic spacer can now be removed from the chassis frame by removing the E-rings, plastic

ring, and the screw.

Plastic Ring

Plastic Spacer

Gear Fixing Plate

Screw

Screws

E-ring

Page 80

5. Removal and Replacement Procedures

Screw

Fuser Lid

Screws

Screw

Thermal Fuse

Thermostat

Screw

Screws

Knob

Knob Side Cover

Coupling Connector Side Cover

5.25 Fuser Unit Component (Heat Lamp, Thermal Fuse and Thermostat)

1. Remove the oil supply roll by pressing on the tabs to unlock the oil supply roll.

2. Place the oil supply roll on a plastic sheet to prevent oil adhesion as shown below.

Oil Supply Roll

Tab

Press Out

Fuser Unit

Plastic Sheet

Tab

Thermal Fuse and Thermostat Removal

Remove the fuser lid (1 screw).

2. Remove the thermal fuse (2 screws), then thermostat

(1 screw).

Oil Supply Roll

Heat Lamp Removal

1. Remove the knob and knob side cover (2 screws).

2. Remove the screw from the coupling connector side

cover.

3. Separate the coupling connector s ide cover by moving

up the area (A) using a flat-blade (-) driver as shown below .

Move up

Coupling Connector Side Cover

Area

(–) Driver

Page 81

FS-5900C Service Manual

4. Remove the screw from the short lead wire (See figure A below).

5. Remove the screw B.

6. Remove the E-ring and screw.

7. Remove the heat lamp with the gear bracket.

8. Separate the heat lamp from the gear bracket by extracting the lead wire from the lead wire path.

Caution: Avoid touching the heat lamp with the fingers. It may be hot and oil from your fingers will con-

taminate the surface.

Figure A

Screw B

Note 2

See

Note 1:

below.

E-ring

Screw

Heat Lamp

Gear Bracket

The long lead wire must be routed into the lead wire path on the gear bracket as shown.

Short Lead Wire

Long Lead Wire (See

Lead Wire Path

Note 1

Screw

Short Lead Wire

Note 2:

Part C must be aligned with part D on the chassis

frame as show n.

Long Lead Wire

Part C

Part D

Page 82

6. Electrical Circuit Description

6.1 Engine Block Diagram

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Page 83

FS-5900C Service Manual

6.2 Printer Main Control Board Block Diagram

Page 84

6. Electrical Circuit Descripti on

6.3 Basic engine functions

This section presents a general functional over view of the engine system of the printer. It was intended to provide a comprehensive knowledge on basic functions that the engine system performs during printing. The following printer functions are covered:

• Engine controller system

• Main logic controller system

• Paper feed system

• Power supply system

6.4 Engine controller system

The engine controller provides control over all print engine activities. It drives laser depending on the video data transmitted from the main controller, provides control over the devices for paper transportation, such as motors, clutches, solenoids, the heater lamp, the eraser, etc., and collects information given by the sensors.

The engine controller is also responsible for the following systems, explained step by step throug h the following pages:

6.4.1 Configuration memory

The engine controller us es a fl ash me mory to st ore the user-selected parameters for configuring th e print er. The flash memory is driven by +5 V power and designed to stand rewriting operations of at least 100,000 times at an identical address.

6.4.2 H igh-voltage generator

The engine controller produces clocks (HVCLK1 and HVCLK2) and apply programmed divisor to generate high-voltage outputs for main charging. The clock oscillation can be toggled on and off by the engine controller CPU.

The engine controller generates analog outputs that control the high voltage potential generated by the high voltage unit. The high voltages unit uses the combination of this analog output and an on/off control signal to control its generation of the high voltage output.

6.4.3 Laser scanner control

In order to activate the laser scanner, the engine controller does the following tasks:

• Generation of laser timing

• Polygon motor activation (start-up and stabilized states)

• Monitor ing laser bea m paths

6.4.4 Polygon motor control

The output frequency signal to the polygon motor is generated by the engine gate array as i t divides the engine system clock (18.0762 5 MHz).

The revolution of the polygon motor (N) = 10*f, where f is the clock frequency (2519.7 Hz) = 25,197 rpm. As the laser beam reaches the beam detector sensor, the sensor board generates the horizontal synchro sig-

nal (NBDLD*). This signal makes the engine gate array consequently turn the video output signal (N VIDEO*) and the APC signal (NADJUST*) low wh ich respectively activate the laser light an d the APC controller.

The engine CPU attempts to detect the horizontal synchronization signal so that the laser diode is normally triggered. If the horizontal synchronization output is not found after the laser driving current control (N ENABLE*) is set low, the engine CPU reco gni zes it as t he fail ure on the l a ser dri ve r b oard a nd gi ves t he E 3 error.

6.5 Safety interlock

For safety purpose, and in order for the product to conform to the safety standards required by the U.S. FDA and several European regulations (IEC 825), the printer is facilitated with safety interlock. Safety

Page 85

FS-5900C Service Manual

interlock is provided by microswitches that work in conjunction with the right side cover, left side cover, and front covers.

If either of these covers is open, the 24V DC input is cut off except at the following areas, ceasing the laser emission in LSU:

•PSU fan

• Fuser/toner developers fan

• IC29 (Vcc), IC30 reference voltage controller Those circuits including the fan motor drivers, high voltage controller, and the fuser controller are deacti-

vated. The laser emission is also deactivated while the imaging unit is removed from the printer for maintenance,

etc., because the 5V DC input for the la ser driver board i s cut off. If the either of the covers mentioned above is opened during the imaging unit is remov ed from the printe r, the enable signal from the laser diode driver is automatically disabled by means of software.

6.5.1 The engine gate array

The engine gate array is a supplementary device to the engine CPU. It is a 208-pin CMOS-type QFP type that has the internal blocks of functionality as shown below.

Page 86

6. Electrical Circuit Descripti on

Gate Array (IC3 )

IC3 serves in the major functions of the printer engine. Pins and their definitions for this gate array is diagrammed as follows.

Gate Arra

(IC3)

Address (Low) A7-0 VCLK16 Video Cl ock

CPU Interface

Toner Empty Sensor

Power Supply Unit

Toner Developer Drive

Motor (Sleeve Motor)

Toner Developer

Toner Developer Selector/

Paper Eject Unit

Paper

Feed Unit

Duplex

Dta/Address (Low) D7-0 VD3-0 Video Data

Address (High) A16-8 HSZ

Read RD VSZ

Write WR

Address Strobe ASTB UPSZ2-0 Cassette Detection Sensor

Vertical Interrupt INTVS UPEMP Cassette Empty

Horizontal Interrupt INTHS

SRAM Chip Selec t CSWSRAM CLBPS Cleaning Blade Positt ion

Program ROM Chip Select CSPROM

Left Side Door Open DOPNPF MMCLK Extemal Clock

Front Cover Open DOPNFR MMP/S Motor Start/Stop

Toner Empty Detection Signal B(C,M,Y)TECLK

Toner Empty Sensor Control B(C,M,Y)TECTL CHGNOT No Charger

System Clock VCLK64

Reset RST HVLD Data Load

Fuser Lamp Control FSRCTL HVDATA Data

Motor Start/Stop SLMP/S STRCTL Second Transfer Voltafe Control

Extemal Clock SLMCLK FTRCTL First Transfer Control

Main Motor Speed

Detection Signal

Drive Unit

Fuser Fan

Fuser Unit

Paper Feed Motor

M.P.T Pickup Roller Movement Sensor MPPKUP

Sleeve Clutch Control B(C,M,Y)SLVCTL HPS Transfer Roll Postition

Fuser Fan Error CFMDERR

Fuser fan Control CFMDCTL OPS OPC Postion

Thermistor Open THOPNCK ERSCTL Eraser LED Control

Temperature High THHIGHCK

No Fuser FSRNOT OZMCTL Ozon Fan Control

Motor Start/Stop FM P /S

Extemal Clock FM CLK VIDEO Video Data

Main Motor Speed

Detection Signal

Toner Developer Sensor Signal B(C,M,Y)CMPS PSEL Laser Power S elect

Cam Motor Drive Signal B(C,M,Y)CMCTL BDLD Beam Detect

Paper Ejection/Exit Sensor EXITS EN 1, 2

Output Paper Tray Sensor EXITFULL SCNC TL Control Signal

Switchback Solenoid Drive Signal FUDCTL SCNCLK Extemal Clock Signal

Duplex Solenoid Power Coltrol DPX SOL 1

Solenoid Power SOLPWR SCNLK Lock Detection Signal

Paper Detection Signal MPPSEN CFMPERR PSU Fan Error

M.P.T Paper Feed Motor MPNA PTLCTL Pre-transfer LED Con trol

Drive Signals MPB

Transfer Roller Control TRUDCTL OPSCLK Serial Clock Signal

Registration Roller Control REGCTL OPSLD Data Load Signal

Pickup Control UPUCTL OPMCTL Option Paper Feeder Motor Control

No Paper Feeder Unit PFUNOT PFMSET 1 Option Feeder Motor Speed Control

Transfer Roller Cam Sensor TRRPS 01PCTL Upper Option Cassette Pick Up Con-

Paper Empty Sensor UPNOT 02PCTL Lower Option Cassette Pick Up Con-

Registration Sensor REGSEN

Duplex Top Sensor TOPSEN Duplex JAM Sensor DJAMSEN Duplex Fan Control DPXFAN

Duplex On Control DPXUON Duplex Off Control DPXUOFF

Duplex Fan Error DPXFNS

SLMLD STRSEL Second Transfer Control Select

FMLD ENABLE Laser Enable

MPA

MPNB OPSRDD 0, 1 Serial Data Signal

CLBCTL Cleaning Blade Control

MMLD Main Motor Speed Detection Signal

HVERR High Voltage Error

HVCLK Clock

DEVCTL Developme nt Bias Control

CHGCTL Scorotron Charger Control

CIKNOT Colo r I maging Unit Detection Signal

OZMERR Ozon Fan Error

ADJUST Laser Power Adjust

Print Control

trol

Video Interface

Voltage Control

Ozon Fan

Cassette

Cleaning Blade

Erraser

Laser Scanning Unit

Polygon Motor

PTL

Main Motor

High Voltage Unit

Accumulator B el t home Detecting Signal

Option Paper Feeder

Page 87

FS-5900C Service Manual

Pin assignment

Pin assignment for the engine gate array is table on the foll owing pages. The device in Remarks column means those which the signal is forwarded to.

Note that only the pins with meaningful assignment are shown below and those for the power line and ground are excluded.

Engin Gate Array Pin Asignment

Pin No Name I/O Description Termination

1GND 2GND 3 NVCLK16 O Video Clock 4 OPIN0 I GND 5OPOUT16 O Open 6 OPIN1 I GND 7NVD0 I Video Data 0 8 OPIN2 I GND

9NVD1 I Video Data 1 10 OPIN3 I GND 11 NVD2 I Video Data 2 12 OPIN4 I GND 13 NVD3 I Video Data 3 14 UPSZ0 I Default Cassette Size Detection 15 UPSZ1 I Default Cassette Size Detection 16 UPSZ2 I Default Cassette Size Detection 17 UPEMP I GND 18 ITCM O Open 19 CLBPS I Int. Transfer Cleaning 20 NMMLD I Main Motor Lock Detection 21 MMPS O Main Motor Start Pulse 22 MMCLK O Main Motor Clock Output 23 CHGNOT I Charger Installation Detection 24 HVERR I HV e rror status 25 NHPS I Int. Transfer Home Position Detection 26 GND 27 Vdd 28 OPS I OPC Home Position Detect 29 SLSTPB I Pull-up 30 ERSCTL O Discharger Control 31 HVLD O D/A Data Load (High Voltage Unit) 32 NHVCLK O D/A Shift Clock (High Voltage Unit) 33 HVDATA O D/A Serial Data Output (High Voltage Unit)

Continued on next page

Page 88

6. Electrical Circuit Descripti on

Pin No Name I/O Description Termination

34 PSPSEL O Open 35 FTRSEL O Open 36 DEVCTL O Dev. Bias Control 37 STRCTL O Second Transfer Bias 38 FTRCTL O First Transfer Bias 39 STRSEL O Second Transfer Bias Select 40 CHGCTL O Charger Output Control 41 OPOUT1 O Open 42 NCIKNOT I CIK Installation Detect 43 OZMERR I Ozone Fan Error 44 OZMCTL O Ozone Fan Control 45 OPOUT2 O Open 46 OPOUT3 O Open 47 OPOUT0 O Open 48 OPIN5 I Duplex Top Sensor 49 OPIN6 I Duplex Jam Detect 50 NVIDEO O NVIDEO 51 GND 52 GND 53 Vdd 54 NC 55 ENABLE O Laser-on Enable 56 ADJUST O Laser APC 57 NPSEL O Laser Outpu t Select 58 OPOUT4 O Sensor Power Control 59 OPOUT5 O PSU Fan Control 60 OPOUT6 O Not Used 61 OPOUT7 O Duplex Fan Control 62 OPOUT8 O Duplex ON Control 63 OPOUT9 O Duplex OFF Control 64 OPOUT10 O Open 65 OPOUT11 O Duplex Solenoid Contr ol 66 DIPSE0 I GND 67 DIPSE1 I GND 68 OPPUT12 O Open 69 OPOUT13 O Open 70 OPOUT14 O Open 71 CFMPERR I PSU Fan Error 72 NMANUSEN I GND 73 CTECLK I Cyan Toner Gauge (Reception)

Continued on next page

Page 89

FS-5900C Service Manual

Pin No Name I/O Description Termination

74 BTECLK I Black Toner Gauge (Reception) 75 YTECLK I Yellow Toner Gauge (Reception) 76 MTECLK I Magenta Toner Gauge (Reception) 77 OPOUT15 O Not Used 78 Vdd 79 GND 80 VCLK64 I Base Oscillation Clock Input 81 OPIN7 I Du plex Fan Error 82 NCTECTL O Cyan Toner Gauge (Emitter) 83 NMTECTL O Magenta Toner Gauge (Emitter) 84 NYTECTL O Yellow Toner Gauge (Emitter) 85 NBTECTL O Black Toner Gauge (Emitter) 86 LCDE O Not Used 87 NLEDSET O Not Used 88 LCDRS O Not Used 89 NKEYRD Not Used 90 24VCTL O N o t Used 91 DOPNFR I Front Door Status Detection 92 DOPNPF I Left Door Status Detection 93 NCSPROM O Program ROM Chip Select 94 OPIN8 I CIK Charger Detection 95 NFSRCTL O Fuser Contr ol 96 OPIN9 I GND 97 NBOLD I HSYNC Detection 98 OPIN10 I GND 99 NSCNLK I Scanner Motor Lock Detection

100 SCNCTL O Scanner Motor Control 101 OPIN11 I GND 102 SCNCLK O Scanner Motor Clock Output 103 NC 104 Vdd 105 GND 106 GND 107 A0 O Address 0 108 D0 1 O Data 0 109 SLMP/S O Sleeve Motor Co ntrol 110 NSLMLD I O Sleeve Motor Lock Detection 111 SLMCLK I O Sleeve Motor Clock Output 112 CSLVCTL I O Cyan Clutch Control 113 YSLVCTL I O Yellow Clutch Control

Continued on next page

Page 90

6. Electrical Circuit Descripti on

Pin No Name I/O Description Termination

114 BSLVCTL I O Black Clutch Control 115 MSLVCTL O Magenta Clutch Control 116 NSLV2B O Open 117 A16 I Address 16 118 A15 I Address 15 119 A14 I Address 14 120 A13 I Address 13 121 A12 I Address 12 122 A11 I Address 11 123 A10 I Address 10 124 A9 I Address 9 125 A8 I Address 8 126 NCSWSRAM O SRAM Chip Select 127 CFMDERR I Fixing Fan Error 128 D1 I O Data 1 129 A1 O Addr ess 1 130 Vdd 131 GND 132 A2 O Addr ess 2 133 D2 I O Data 2 134 NPTLCTL O Pre-transfer Static Elimination Control 135 CFMDCTL O Fixing Fan Control 136 THOPNCK I Thermistor Open Detection 137 THHIGHCK I Fixing Overheat Detection 138 NFSRNOT I Fixing Unit Installation Detection H = Not

Detected 139 NOSRNOT I GND 140 NRD I Read 141 NWR I Write 142 ASTB I Address Strobe 143 INTVS O Int. Transfer Home Clutch Clear 144 NINTHS O BD Clutch Clear 145 NFMLD I Feed Motor Lock Detect 146 FMP/S O Feed Motor Control 147 FMCLK O Feed Motor Clock Output 148 MPPSEN I Multi-purpose Paper Detection 149 BCMPS I Developer Position Detection (Black) 150 YCMPS I Developer Position Detection (Yellow) 151 MCMPS I Developer Po sition Detection (Magen ta) 152 CCMPS I Developer Position Detection (Cyan) 153 D3 I Data 3

Continued on next page

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FS-5900C Service Manual

Pin No Name I/O Description Termination

154 A3 I Address 3 155 GND 156 GND 157 Vdd 158 NC 159 A4 O Address 4 160 D4 I O Data 4 161 EXITSEN1 I Fixer Outlet Paper Detection 162 EXITSEN2 I Outlet Paper Detection 163 EXITFULL I Outlet Overstack Detection 164 NYCMCTL O Cam Motor Control (Yellow) 165 NMCMCTL O Cam Motor Control (Magenta) 166 NCCMCTL O Cam Motor Control (Cyan) 167 NBCMCTL O Cam Motor Contr ol (Black) 168 NFUDCTL O Face Up/Down Control 169 NSOLPWR O FD Solenoid Power Control 170 TRUDCTL O No. 2 Transfer Roller Up/Down Control 171 REGCTL O Registration Roller Control 172 UPUCTL O Default Cassette Pickup Control 173 MPA I O Multi-purpose Motor Control (A) 174 MPNA I O Multi-purpose Motor Control (NA) 175 MPB I O Multi-purpose Motor Control (B) 176 MPNB I O Multi-purpose Motor Control (NB) 177 PFUNOT I Paper Feed Unit Installation Detect 178 D5 I O Data 5 179 A5 O Address 5 180 OPIN12 I GND 181 NRST I System Reset 182 GND 183 Vdd 184 A6 O Address 6 185 D6 I O Data 6 186 NTRRPS I Transfer Roller Position Detect 187 NUPNOT I Default Cassette Paper Detect 188 NMPPKUP I Multi-purpose Pickup Roller Position Detect 189 NREGSEN I Regis tration Position Paper Detect 190 OPSRDD1 I Option Feeder Data 191 OPSRDD0 I Option Feeder Data 192 OPMCTL O Option Feeder Motor Control 193 NO1PCTL O Option Feeder Pickup 1

Continued on next page

Page 92

6. Electrical Circuit Descripti on

Pin No Name I/O Description Termination

194 NO2PCTL O Option Feeder Pickup 2 195 NOPSCLK O Option Feeder Data Clock 196 NOPSLD O Option Feeder Data Load Pulse 197 PFMSET1 O Option Feeder Motor Speed Control 198 CLBCTL O Cleaning Blade Control 199 NVSZ O Vertical Size 200 OPIN13 I GND 201 NHSZ2 O Not Used 202 OPIN14 I GND 203 NHSZ O Horizontal Size 204 OPIN15 I GND 205 D7 I O Data 7 206 A7 O Addr ess 7 207 NC 208 Vdd

6.5.2 Power supply

The power supply contains the AC and DC power inputs and outputs. The high voltage bias generator circuit is mounted on a separate board. A simplified power distribution diagram is shown on page 86.

AC INPUT AND RECTIFIER

The primary AC input power arrives at CN201 following the power switch and fuse F201, and enters AC line filter circuit (L222, L201, C201, etc.). D203 rectifies it to DC; Q201 and Q202 provide switching on it for downverting by T201 to develop +24V and +5V DC.

24V DC POWER LINE

The 24V DC appearing at the secondary side of T201 is rectified by D302 and smoothed by C305, C306, etc., and distributed through CN301. The +24V power is regulated by means of the feedback loop using IC301 and PC202. The 24V DC line is represe nted as VDD or VDDCOM and used to fee d the foll owing engine component:

• Face-up/down stack solenoids, MP tray paper feed solenoid

• Clutches (registration, intermediate)

•Fans

• High-voltage generator (board)

• Main motor, las er polygon motor, toner motor

• Clutches, motors, solenoids wi thin the option units

• Laser APC, fuser heater control, eraser LED The 24V DC power is forcibly interrupted for safety whenever the front cover, right side cover, or left side

cover is open. For details, see the

Safety interlock

section, page 77.

5V DC POWER LINE

The +5V DC line is generated by switching (IC302 and D301) the +24V DC to develop the 5V DC which is subsequently rectified and smoothed by D40, C40, etc. It is also distributed through CN301. The main controller circuits, sensors, engine controller circuits, etc., are fed by the +5V DC line (also referred to as VCC).

The +5VDC power is downverted from the +24V power and regulat ed by IC302, Q301, et c.

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FS-5900C Service Manual

POWER PROTECTION CIRCUIT

A fraction of the +24V DC power is connected to the protection diode PC1 for provides protection action for the power supply. The output of +24V is protected from short-circuiting by F303 as well as detection in the primary circuit.

FUSER HEATER POWER CONTROL

In the primary circuit, the fuser heater lamp and the thermostat are connected parallel across CN204. The heater lamp is controlled by D205. Each is turned on when the gate are triggered, respectively energizing the appropriate heater lamp.

For details on the fuser function, refer to on page .

Power Circuit Distribution

Page 94

6. Electrical Circuit Descripti on

6.6 Logic controller system

The main logic controller has the overall specifications as tabled on next page. A simplified block diagram is shown on page 88. The logic controller system does the following:

• Communicates with the host computer to receive data at one of the printer’s interface

• Analyzes and translates the print data to be the dot data in the raster memory

• Communicates with the engine system to discern readiness for printing

• Stores fonts and macro information The main logic controller has specifications as shown in the following section. A simplified diagram is illus-

trated on page 88.

Main Logic Controller Specifications

Item Specification

CPU PowerPC740/200 MHz Co-processor Peerless QP-1800 Gate array Fujitsu MB87D129 System ROM size 8 MB (4 MB × 2 slots); flash DIMM RAM size Standard 48 MB (onboard 16 MB (2 MB × 8) + SIMM slot 32 MB)

Option 4, 8, 16, or 32 MB × 2 Status ROM 128 kB flash ROM Fonts Resident 4 MB (2 M × 16 bits)

Custom 45 Type 1, 80 PCL bitmap, TrueType rasterizer Application program interface 512 kB (256 k × 16 bits) × 1 PC card 1 slot, JEIDA4.2/PCMCIA2.1, max. 32 MB Interface Parallel High-speed bi-directional [IEEE 1284]

Serial RS-232C (8-pin DIN); barcode reader support

Option Network interface [Kuio] Harddisk (option) Onboard, 2GB [HD-2C] Engine comm u nication Serial interfac e Front panel communication Serial interface Other features Smoothing None

Toner saver EcoPrint [On/Off]

Enlarge/reduc-

tion

None

Compatibility KPDLII (PostScript compatible), PCL5C, Prescribe IIC Colour correction KC Colour Correction

Page 95

FS-5900C Service Manual

Controller block diagram

YC1

HDD

Data Bus(16D 16bit)

U11

API

FONT ROM

YC5

IC Card

DIMM 4MBx2Slot

YS1,YS2 System ROM

Address Bus(BA 32bit)

U9,U10,U12,U13

Buffer 74x244

Address Bus(MPCA 32bit)

U5,U7

Data Bus(DH32bit)

33MCLKO

Buffer 74x245

U4,U6

Buffer 74x244

G/A

MB87D129

U27

Status ROM

Video Data(Serial)

AD Bus (BAD 32bit)

Divider

YC2

KUIO

Front Panel I/F

Video Data (4bit)

Divider

Vclk16

QVCLK

Engine Command/Status

QP1800

32MH

DRAM Address Bus(DA 11bit)

DRAM Data Bus(DD32bit)

YC7

KME Printer

YS3,YS4

Option RAM SIMM 2

Standard RAM

U14,U15,U16,U17

MPU

MPC603e

(Int 100Mhz)

66MH

Y1 14.7456MHz

YC3 Serial I/F

YC6 Parallel I/F

Page 96

6. Electrical Circuit Descripti on

6.6.1 Printing data processing

The printer communicates with the host computer for receiving the print data at one of the printer’s interfaces and temporarily store them in the interface buffer. The main logic controller analyzes the data for translating them into the dot data according to the original print image. The resultant dot data are depicted in the raster memory (DRAM’s).

While data processing is in course, on the other hand, the main logic controller CPU talks to the engine CPU via the engine interface, to discern the readiness of the printer’s engine for printing.

If the engine is ready to start printing, the main controlle r issues print signal towards the engin e controller which request the paper feed. In synchronization with th e procession of the paper wi thin the printer, U2 releases video data in the raster memory. Thus the video data are transferred to the laser scanner together with the horizontal synchronization signal a n d the video clock.

On reception of the video data, the laser diode turns on and off to constitutes the print image over the drum. The image on the drum, referred to as the static latent image, is applied with toner, transferred onto the paper, and finally fused permanently on the paper by means of heat and p ressure.

6.7 Main logic component

CPU (U1)

A PowerPC740/200 MHz is used. This 64-bit processor is operated at 32-bit width. The external clock of 33 MHz is sextupled to 200 MHz by the internal PLL circuitry.

Co-processor (U3)

The Peerless QP01800 is used. This ASIC includes the following circuitries:

• Processor interface

• Interrupt controller

•ROM interface

• I/O interface

• Engine interface controller

• DRAM controller

• P1284 controller

• Serial communication controller

• Graphics execution unit

• Print engine video controller

ASIC (U4)

This ASIC implements the following functionalities by use of signals provided QP-1800:

• System DIMM control

• Memory card control

• Font ROM control

• Front panel interface control

• Harddisk interface control

• Simulated DMA access for KUIO

• Character check for parallel interface

• Video data triggering For data buses of 16 bit wide for such as memory card and fonts, 32-bit conversion for CPU is implemented

within this ASIC.

Page 97

FS-5900C Service Manual

System DIMM (YS1/YS2)

Two 72-pin DIMM with 4MB capacity are used for the system. The firmware can be up-versioned by downloading a new firmware data.

Main RAM (U14 through U24)

Eight 16Mbit DRAM’s are used in EDO mode, constituting 16 MB of base memory and a 32 MB SIMM in YS3 as the default (48 MB in total). The main RAM is expandable up to 112 MB using two open sockets on the main logic board. SIMM to be used should comply with the following specifications:

No. of SIMM sockets 2 Socket code YS4, YS5 No. of pins 72 Size 8, 16, or 32 MB Access speed <70ns

Memory card interface (YC5)

The printer supports PCM CI A 2.1- or JEI DA4.2 -comp ati ble, Type I SRAM or flash type memory cards. The maximum size is 32 MB. For SRAM cards, the printer recognizes the battery voltage and write-protection switch.

KUIO interface (YC1)

This is the interface for a slot-in option device conforming to the KUIO interface specifications. For model FS-5900C, this accepts a network interface card.

The pin assignment for the connector is given below.

Pin No. Te rminal Signal Pin No. Term i nal Signal

A1 VCC (+5V) VCC A16 CTLRDY CTLRDY B1 VCC (+5V) VCC B16 OP2DREQ OP2DREQ A2 VCC (+5V) VCC A17 GND GND B2 NC NC B17 OP2DACKN OP2DACKN A3 GND GND A18 IOR* LIORN B3 NC NC B18 IOW* LIOWN A4 NC NC A19 RESET* RESETN3 B4 A16 IOA16 B19 NC NC A5 GND GND A20 D15 LD15 B5 A15 IOA15 B20 D14 LD14 A6 A14 IOA14 A21 GND GND B6 A13 IOA13 B21 D13 LD13 A7 A12 IOA12 A22 D12 LD12 B7 A11 IOA11 B22 D11 LD11 A8 A10 IOA10 A23 D10 LD10 B8 A9 IOA9 B23 D9 LD9 A9 GND GND A24 D8 LD8

B9 A8 IOA8 B24 D7 LD7 A10 A7 IOA7 A25 GND GND B19 A6 IOA6 B25 D6 LD6 A11 A5 IOA5 A26 D5 LD5 B11 A4 IOA4 B26 D4 LD4

Page 98

6. Electrical Circuit Description

Pin No. Terminal Signal Pin No. Terminal Signal

A12 A3 IOA3 A27 D3 LD3 B12 A2 IOA2 B27 D2 LD2 A13 GND GND A28 D1 LD1 B13 NC NC B28 D0 LD0 A14 OP2CS OP2CSN A29 GND GND B14 OP2ACK OP2ACKN B29 VCC (+5V) VCC A15 OP2IRN OP2IRN A30 VCC (+5V) VCC B15 NC NC B30 VCC (+5V) VCC

Parallel interface

The printer has a port for the parallel interface that is compatible with the current line-up of the Ecosys series printers. The parallel interface supports the protocols defined by the IEEE 1284 standards. To gain conformity to these standards, the prin ter supports the ECP and nibble modes.

Details on the signals on the parallel interface are described in the appropriate appendix in this manual.

Serial interface

The printer incorporates a port for the serial interface. The serial interface controller is included within the gate array and supports RS-232C protocol. Since the RS-232C support is designed to be compatible with SNMP (Simple Network Management Protocol ), CTS and DSR signals are included.

A 8-pin mini DIN connector is used for the serial port. (See Appendix A for the interface later in this manual for details.) A conversion cable kit is available for connecting the printer’s serial interface to a D-SUB connector of the serial interface of the computer.

The serial interface has the following features:

Connector type 8-pin mini DIN Baud rates/sec. 300/600/1200/2400/4800/9600/19200/38400/57600/115200 Protocol RS-232C

Engine interface

The interface to the engine system is b ased on the serial interface, not the parallel interface that was used with the previous line-up of the Ecosys printers. For communication interface, the QP-1800’s interface is used.

Page 99

FS-5900C Service Manual

Engine interface connector assignment

Pin No. Signal Pin No. Signal Pin No . Signal

A1 GND A11 GND A21 GND

B1 VCC B11 NCCLK B21 VDAT2

A2 GND A12 GND A22 GND

B2 VCC B12 STSC B22 VDAT3

A3 GND A13 SBSY A23 FPGND

B3 VCC B13 CMDC B23 FPGND

A4 GND A14 MCPRDY A24 No connecti on

B4 VCC B14 CBSY B24 No connection

A5 GND A15 PURGE A25 No connection

B5 VCC B15 NPPRDY B25 FPDATC

A6 GND A16 GND A26 No connection

B6 VCC B16 NVSZC B26 No connection

A7 GND A17 GND A27 No connection

B7 VCC B17 NHSZC B27 FPDIRC

A8 GND A18 GND A28 No connection

B8 VCC B18 VCLK16C B28 VCC

A9 VCC A19 GND A29 FPGND

B9 VCC B19 VDAT0 B29 VCC A10 GND A20 GND A30 FPGND B10 No connection B20 VDAT1 B30 FPCLKC

6.8 Print engine (video) interface

This section defines the interface between the printer engine and the raster image pro cessor (RIP). The terms video and raster refer to the method of image data transfer. The data is synchronized to the vertical and horizontal beam scanning while printing.

The engine modulates the laser beam to print an image. The image data and printing control is through the video interference connection. General control and status information is communicated through a serial interface in the same connector.

Page 100

6. Electrical Circuit Descripti on

6.8.1 Physical Characteristics

The printer/image processor interface consists of image data and control data signal lines. Signal names with N as the first character are asserted (true) with low levels. The diagram below is a simplified block diagram for the RIP and the engine portions of the printer.

1. Printing video interface lines

VD0 through VD3 image data VCLK: video clock NVSZ: Vertical size NHSZ: horizontal size

2. Printing control lines

NCPRDY: Controller po wer ready

RASTER IMAGE PROCESSOR (RIP)

Front panel Interfaces

[Centronics, RS-232C]

Explanation to the above diagram

1. Printing video interference signal lin es

These lines are for image data transfer in bit-parallel fashion.

PURGE: Purge media NPRDY: Print engine power ready

3. Serial control lines

CMD: Command serial data CBSY: Command busy NCCLK: Communication clock

STS: Status serial data SBSY: Status busy

4. Power lines

+5V and ground

ENGINE CONTROL CPU

LASER SCANNER UNIT

2. Printing control lines Printing enable lines and control options. These lines exchange status and control information.

3. Serial control lines These lines consist of command signals employed to control the printer by the image processor. Status signals return information about the printer status. Commands and status responses are transmitted and received as clocked serial signals.

4. Power lin es

Mita-Kyocera FS5900C SERVICE MANUAL [UK]

Specifications and Main Features

Frequently Asked Questions

User Manual

1.1 Specifications

1. Introduction

1.2 Options, Accesso r ies and Supplies

1.3 Control Panel Overview

1.4 Rear Panel

1.5 Parts Identification

1.6 Component Layout

1.7 Electrical Components

1.8 Switche s/Sensors Identification

2. Installation, Setup, and Repacking

2.1 Installation Requirements

2.2 Setup

2.3 Installing RAM SIMMs (Option)

2.4 Replacing the Fuser Unit

2.5 Replacing the Imaging Unit

2.6 Repacking

3. Mode Selection

3.1 Nav igating through the Menus

4. Mechanical Functions

4.1 Drive Mechanism/Image Process General Description

4.2 Print Process

5. Removal and Replacement Procedures

5.1 Upper Rear, Lower Rear and Top Covers

5.3 Operation Panel Cover and Printer LCD Board

5.4 Safety Interlock Switches and Toner Empty Sensor Board (T)

5.5 Front Cover and Bottom Front Cover

5.6 Front Right Side, Rear Right Side and Lower Right Side Covers

5.7 Left Side Cover

5.8 Printer Main Control Board, HSYNC Board and Network Relay Board

5.9 Paper Feed Unit

5.10 Tone r Developer Selector/Paper-eject Unit

5.11 Engine Control Board Shield Cover

5.12 Laser Scanning Unit (LSU)

5.13 Power Supply Unit

5.14 Engine Control Board

5.15 Fuser/Toner Developer Fan Motor and Ozone Fan Motor

5.16 Main Motor, Paper Feed Motor and Left Side Cover Switch

5.17 Transfer Roller Bias Terminal, FTR Bias Terminal, Home Sensor Board and Fuser Joint Connector

5.18 IT Cleaning Solenoid Board and Toner Developer Drive Motor/ Toner Developer Drive Unit

5.19 Printer Main Control Board Holder, Printer Panel Relay Board and High Voltage Board

5.21 Cassette Detection Sensor Board

5.22 Pre-Exposure Eraser and Pre-Transfer Boards

5.23 Pre-Transfer Board Bracket and Toner Developer Guide Rails

5.24 Cassette Guide, Fuser Guide Frame and Fuser/Paper Feed Unit Drive Gears

6.1 Engine Block Diagram

6. Electrical Circuit Description

6.2 Printer Main Control Board Block Diagram

6.3 Basic engine functions

6.4 Engine controller system

6.5 Safety interlock

6.6 Logic controller system

6.7 Main logic component

6.8 Print engine (video) interface