Ricoh Aficio350, Aficio450 Service Manual s af350e

Adonis-C1b/C1c

(Machine Code: A283 and A284)

SERVICE MANUAL

IMPORTANT SAFETY NOTICES

PREVENTION OF PHYSICAL INJURY

1. Before disassembling or assembling parts of the copier and peripherals, make sure that the copier power cord is unplugged.

2. The wall outlet should be near the copier and easily accessible.

3. Note that some components of the copier and the paper tray unit are supplied with electrical voltage even if the main power switch is turned off.

4. If any adjustment or operation check has to be made with exterior covers off or open while the main switch is turned on, keep hands away from electrified or mechanically driven components.

5. If the Start key is pressed before the copier completes the warm-up period (the Start key starts blinking red and green alternatively), keep hands away from the mechanical and the electrical components as the copier starts making copies as soon as the warm-up period is completed.

6. The inside and the metal parts of the fusing unit become extremely hot while the copier is operating. Be careful to avoid touching those components with your bare hands.

HEALTH SAFETY CONDITIONS

1. Never operate the copier without the ozone filters installed.

2. Always replace the ozone filters with the specified ones at the specified intervals.

3. Toner and developer are non-toxic, but if you get either of them in your eyes by accident, it may cause temporary eye discomfort. Try to remove with eye drops or flush with water as first aid. If unsuccessful, get medical attention.

OBSERVANCE OF ELECTRICAL SAFETY STANDARDS

1. The copier and its peripherals must be installed and maintained by a customer service representative who has completed the training course on those models.

2. The NVRAM on the system control board has a lithium battery which can explode if replaced incorrectly. Replace the NVRAM only with an identical one. The manufacturer recommends replacing the entire NVRAM. Do not recharge or burn this battery. Used NVRAM must be handled in accordance with local regulations.

SAFETY AND ECOLOGICAL

1. Do not incinerate toner bottles or used toner. Toner dust may ignite suddenly when exposed to an open flame.

2. Dispose of used toner, developer, and organic photoconductors in accordance with local regulations. (These are non-toxic supplies.)

3. Dispose of replaced parts in accordance with local regulations.

4. When keeping used lithium batteries in or der to dispos e of them later, do not put more than 100 batteries per sealed box. Storing larger numbers or not sealing them apart may lead to chemical reactions and heat build-up.

NOTES

FOR DISPOSAL

LASER SAFETY

The Center for Devices and Radiological Health (CDRH) prohibits the repair of laser-based optical units in the field. The optical housing unit can only be repaired in a factory or at a location with the requisite equipment. The laser subsystem is replaceable in the field by a qualified Customer Engineer. The laser chassis is not repairable in the field. Customer engineers are therefore directed to return all chassis and laser subsystems to the factory or service depot when replacement of the optical subsystem is required.

WARNING

Use of controls, or adjustment, or performance of procedures other than those specified in this manual may result in hazardous radiation exposure.

WARNING

WARNING: Turn off the main switch before attempting any of the

procedures in the Laser Unit section. Laser beams can seriously damage your eyes.

CAUTION MARKING:

1. OVERALL MACHINE INFORMAT ION........................................1-1

1.1 SPECIFICATIONS.................................................................................... 1-1

1.2 PAPER EXIT TRAY SELECTION............................................................. 1-4

1.3 MACHINE CONFIGURATION.................................................................. 1-5

1.3.1 SYSTEM COMPONENTS ............................................................... 1-5

1.3.2 INSTALLABLE OPTION TABLE...................................................... 1-7

1.4 MECHANICAL COMPONENT LAYOUT................................................... 1-8

1.5 PAPER PATH........................................................................................... 1-9

1.6 DRIVE LAYOUT ....................................................................................... 1-9

1.7 ELECTRICAL COMPONENT DESCRIPTIONS...................................... 1-10

1.8 BOARD STRUCTURE............................................................................ 1-14

1.8.1 BLOCK DIAGRAM......................................................................... 1-14

1.8.2 DESCRIPTIONS............................................................................ 1-15

2. DETAILED DESCRIPTIONS .......................................................2-1

2.1 SCANNING............................................................................................... 2-1

2.1.1 OVERVIEW ..................................................................................... 2-1

2.2 IMAGE PROCESSING .............................................................................2-2

2.2.1 OVERVIEW ..................................................................................... 2-2

2.2.2 SBU ................................................................................................. 2 -3

2.2.3 IMAGE PROCESSING .................................................................... 2-4

3. INSTALLATION PROCEDURE...................................................3-1

3.1 INSTALLATION REQUIREMENTS .......................................................... 3-1

3.1.1 ENVIRONMENT ..............................................................................3-1

3.1.2 MACHINE LEVEL............................................................................ 3-1

3.1.3 MINIMUM SPACE REQUIREMENTS.............................................. 3-2

3.1.4 POWER REQUIREMENTS.............................................................. 3-3

3.2 INSTALLATION FLOW CHART................................................................ 3-4

3.3 COPIER INSTALLATION.......................................................................... 3-5

3.3.1 ACCESSORY CHECK..................................................................... 3-5

3.3.2 INSTALLATION PROCEDURE........................................................ 3-6

3.4 PAPER TRAY UNIT INSTALLATION..................................................... 3-11

3.4.1 ACCESSORY CHECK................................................................... 3-11

3.4.2 INSTALLATION PROCEDURE...................................................... 3-12

3.5 1-BIN TRAY UNIT INSTALLATION ........................................................ 3-16

3.5.1 ACCESSORY CHECK................................................................... 3-16

3.5.2 INSTALLATION PROCEDURE...................................................... 3-17

3.6 BRIDGE UNIT INSTALLATION.............................................................. 3-22

3.6.1 ACCESSORY CHECK................................................................... 3-22

3.6.2 INSTALLATION PROCEDURE...................................................... 3-23

3.7 AUTO REVERSE DOCUMENT FEEDER INSTALLATION.................... 3-25

3.7.1 ACCESSORY CHECK................................................................... 3-25

3.7.2 INSTALLATION PROCEDURE...................................................... 3-26

3.8 LCT INSTALLATION .............................................................................. 3-28

3.8.1 ACCESSORY CHECK................................................................... 3-28

3.8.2 INSTALLATION PROCEDURE...................................................... 3-29

3.9 1,000-SHEET FINISHER INSTALLATION.............................................. 3-31

3.9.1 ACCESSORY CHECK................................................................... 3-31

3.9.2 INSTALLATION PROCEDURE...................................................... 3-32

3.10 3,000-SHEET FINISHER INSTALLATION............................................ 3-35

3.10.1 ACCESSORY CHECK................................................................. 3-35

3.10.2 INSTALLATION PROCEDURE.................................................... 3-36

3.11 PUNCH UNIT INSTALLATION............................................................. 3-39

3.11.1 ACCESSORY CHECK................................................................. 3-39

3.11.2 INSTALLATION PROCEDURE.................................................... 3-40

3.12 PLATEN COVER INSTALLATION........................................................ 3-43

3.13 KEY COUNTER INSTALLATION .........................................................3-44

3.14 ANTI-CONDENSATION HEATER........................................................ 3-46

3.15 TRAY HEATER..................................................................................... 3-48

3.16 TRAY HEATER (OPTIONAL PAPER TRAY UNIT).............................. 3-49

4. SERVICE TABLES......................................................................4-1

4.1 SERVICE PROGRAM MODE TABLES.................................................... 4-1

4.1.1 TEST PATTERN PRINTING (SP2-902)......................................... 4-42

4.1.2 INPUT CHECK............................................................................... 4-43

4.1.3 OUTPUT CHECK........................................................................... 4-47

4.1.4 SYSTEM PARAMETER AND DATA LISTS (SMC LISTS)............. 4-48

4.1.5 NIP BAND WIDTH ADJUSTMENT (SP1-109)............................... 4-49

4.1.6 MEMORY ALL CLEAR (SP5-801)................................................. 4-50

4.1.7 SOFTWARE RESET...................................................................... 4-51

4.1.8 SYSTEM SETTING AND COPY SETTING (UP MODE) RESET... 4-51

4.1.9 NVRAM DATA DOWNLOAD......................................................... 4-52

4.2 PROGRAM DOWNLOAD....................................................................... 4-54

4.3 USER PROGRAM MODE....................................................................... 4-58

4.3.1 HOW TO ENTER AND EXIT UP MODE........................................ 4-58

4.3.2 UP MODE TABLE.......................................................................... 4-58

4.4 TEST POINTS/DIP SWITCHES/LEDS................................................... 4-60

4.4.1 DIP SWITCHES............................................................................. 4-60

4.4.2 TEST POINTS............................................................................... 4-60

4.4.3 LEDS ............................................................................................. 4-61

4.5 SPECIAL TOOLS AND LUBRICANTS ................................................... 4-61

4.5.1 SPECIAL TOOLS........................................................................... 4-61

4.5.2 LUBRICANTS................................................................................ 4-61

5. PREVENTIVE MAINTENANCE SCHEDULE...............................5-1

5.1 PM TABLE................................................................................................ 5-1

6. REPLACEMENT AND ADJUSTMENT ........................................ 6-1

6.1 SCANNER UNIT....................................................................................... 6-1

6.1.1 EXPOSURE GLASS........................................................................ 6-1

6.1.2 SCANNER EXTERIOR/OPERATION PANEL................................. 6-2

6.1.3 LENS BLOCK/SBU ASSEMBLY...................................................... 6-3

6.1.4 SCANNER MOTOR......................................................................... 6-4

6.1.5 SIB/LAMP STABILIZER................................................................... 6-5

6.2 LASER UNIT............................................................................................. 6-6

6.2.1 CAUTION DECAL LOCATIONS...................................................... 6-6

6.2.2 LASER UNIT.................................................................................... 6-7

6.2.3 LASER BEAM PITCH ADJUSTMENT............................................. 6-8

6.3 COPY ADJUSTMENTS: PRINTING/SCANNING..................................... 6-9

6.3.1 PRINTING........................................................................................ 6-9

6.3.2 SCANNING.................................................................................... 6-12

6.3.3 ADF IMAGE ADJUSTMENT.......................................................... 6-14

7. TROUBLESHOOTING.................................................................7-1

7.1 SERVICE CALL CONDITIONS................................................................. 7-1

7.1.1 SUMMARY....................................................................................... 7-1

7.1.2 SC CODE DESCRIPTIONS............................................................. 7-2

7.2 ELECTRICAL COMPONENT DEFECTS................................................ 7-24

7.2.1 SENSORS..................................................................................... 7-24

7.2.2 SWITCHES.................................................................................... 7-25

7.3 BLOWN FUSE CONDITIONS................................................................. 7-26

iii

14 January, 2000 SPECIFICATIONS

1. OVERALL MACHINE INFORMATION

1.1 SPECIFICATIONS

The “*” mark indicates differences between these machines and the NAD machines.

Adonis-C1b (35 cpm) Adonis-C1c (45 cpm) Note

Configuration: Desktop Copy Process: Dry electrostatic transfer system Original: Sheet/Book Original Size

Copy Paper Size:

Copy Paper Weight:

Reproduction Ratios:

Zoom: Both versions:

Copying Speed 35 cpm

Resolution*: Scanning and Printing: 600 dpi Gradation: Scanning and Printing: 256 levels Warm-up Time: Less than 85 s Less than 100 s First Copy Time

(1st Tray):

Copy Number Input:

Maximum A3/11 Maximum:

A3/11

Minimum:

A5/5.5 A6/5.5" x 8.5" lengthwise (By-pass)

Paper Tray/Duplex:

64 - 105 g/m

By-pass:

52 - 157 g/m 7R5E Metric version (%):

400, 200, 141, 122, 115,

100, 93, 87, 82, 71, 65,

50, 25 Inch version (%):

400, 200, 155, 129, 121,

100, 93, 85, 78, 73, 65,

50, 25

25% to 400% in 1%

steps

(A4/11 19 cpm

(A3/11

Less than 3.9 s Less than 3.2 s

Ten-key pad, 1 to 999 Count up or

x 17

x 8.5" lengthwise (Paper tray / Duplex)

x 8.5" sideways)

x 17")

x 17

, 20 – 28 lb

, 16 – 42 lb

7R5E Metric version (%):

400, 200, 141, 122, 115, 100, 93, 87, 82, 71, 65, 50, 35

Inch version (%):

400, 200, 155, 129, 121, 100, 93, 85, 78, 73, 65, 50, 32

Metric version:

35% to 400% in 1% steps

Inch version:

32% to 400% in 1% steps

45 cpm

(A4/11

22 cpm

(A3/11

x 8.5" sideways)

x 17")

Full size Repeat copy

mode

23°C, 73°F A4/11

sideways (1st paper tray)

count down

x 8.5

Overall

Information

1-1

SPECIFICATIONS 14 January, 2000

Adonis-C1b (35 cpm) Adonis-C1c (45 cpm) Note

Manual Image Density Selection:

Automatic Reset:

Auto Shut Off: Copy Paper

Capacity:

Copy Tray Capacity:

Toner Replenishment:

Toner Yield:

Power Source: North America Dimensions

(W x D x H) Weight: 75 kg (166 lb)

5 steps

60 s is the standard setting; it can be changed with a UP mode.

60 min. is the standard setting; it can be changed with a UP mode.

Paper Tray:

500 sheets (stack thickness up to 56 mm, 2.2 By-pass Feed:

50 sheets (stack thickness up to 5.5 mm, 0.2 A4/11 A3/B4/8.5 Cartridge exchange (700 g/cartridge)

27k copies

670 x 640 x 720 mm (26.4

x 8.5": 500 sheets

x 14"/11" x 17": 250 sheets

(A4 sideways, 6% full black, 1 to 1 copying, ADS

mode)

120V/60Hz, More than 12 A

x 25.2" x 28.3")

)

) x 2

Standard copy tray

Without options

Power Consumption: Mainframe only

Adonis-C1b Adonis-C1c Note

Maximum Less than 1.44 kW Less than 1.44 kW

Copying Less than 1.05 kW Less than 1.05 kW Warm-up Less than 1.00 kW Less than 1.05 kW Stand-by Less than 200 Wh Less than 220 Wh

System

Adonis-C1b Adonis-C1c Note

Maximum Less than 1.44 kW Less than 1.44 kW

Copying Less than 1.15 kW Less than 1.15 kW Warm-up Less than 1.00 kW Less than 1.05 kW Stand-by Less than 200 Wh Less than 230 Wh

Without the optional heaters, fax unit, and printer controller.

1-2

14 January, 2000 SPECIFICATIONS

Noise Emission:

Mainframe Only Full System

Copying

Adonis-C1b Adonis-C1c

Stand-by

Adonis-C1b Adonis-C1c

52 dB(A) or less 56 dB(A) or less

27 dB(A) or less 27 dB(A) or less

60 dB(A) or less 62 dB(A) or less

28 dB(A) or less 28 dB(A) or less

Overall

Information

NOTE:

1) The above measurements were made in accordance with ISO 7779.

2) Full system measurements do not include the optional fax unit and the printer controller.

3) In the above stand-by condition, the polygon motor is not rotating.

1-3

PAPER EXIT TRAY SELECTION 14 January, 2000

1.2 PAPER EXIT TRAY SELECTION

[A] A4, LT [B] A3, LT

[C] Longer than A3, DLT

A284V508.WMF

The machine allows selection between the paper tray exit trays: Int. Tray [A] (standard output tray), Int. Tray 2 [B] (optional one-bin tray), and Ext. Tray [C] (finisher or optional external output tray). If the sub-scan length is more than 330 mm, the exit tray is as shown below, if the relevant options have been installed.

Installed options Exit tray for paper longer than 330 mm

Bridge unit & Finisher (1,000-sheet) Int. Tray [A] Bridge unit & Finisher (3,000-sheet) Ext. Tray [C]: The finisher upper tray Bridge unit & optional ext. output tray Ext. Tray [C]: Ext. output tray

1-4

14 January, 2000 MACHINE CONFIGURATION

1.3 MACHINE CONFIGURATION

1.3.1 SYSTEM COMPONENTS

Overall

Information

11 1

A284V502.WMF

1-5

MACHINE CONFIGURATION 14 January, 2000

Symbol: U: Unique option, C: Option also used with other products

Version Item Machine Code No. Note

Copier (Adonis-C1b) A283 5 Copier (Adonis-C1c) A284 5 ARDF (Option) A680 2 C: (NAD) Platen Cover (Option) A381 1 C: (NAD) Paper Tray Unit (Option) A682 6 C: (NAD) LCT (Option) A683 4 C: (NAD) 1-bin Tray (Option) A684 3 C: (NAD)

Copy

Fax

Printer

Scanner

Bridge Unit (Option) A688 10 C: (NAD) 1000-sheet Finisher (Option) A681 8 C: (NAD) 3000-sheet Finisher

(Option – Adonis-C1c only) Punch Unit

(Option for 3000-sheet Finisher) External Output Tray (Option) A825 9 C: (NAD) Key Counter Bracket (Option) A674 11 C: (NAD) Expansion Box (Option) A872 --- U Fax Unit (Option) A874 --- U ISDN Unit (Option) A816 --- C: (NAD) RAM SIMM (Option) --- --400-dpi High Resolution (Option) A892 --- C: (Russian) PC-Fax Expander B368 --- U Handset (Option) A646 --- C: (NAD) Stamp Unit (Option) A813 --- C: (NAD) Printer Controller B358 --- U PostScript Kit A854 --- C: (NAD) Hard Disk A853 --- C: (NAD) Network Interface Board A855 --- C: (NAD) Mailbox G909 --- C: (NAD) Mailbox Bridge Unit G912 --- C: (NAD) RAM SIMM --- --Scanner Kit B359 --- U RAM SIMM --- ---

A812-17 (3 holes) A812-27 (2 holes)

A697 7 C: (NAD)

--- C: (NAD)

Symbol: U: Unique options C: Option also used with other products

1-6

14 January, 2000 MACHINE CONFIGURATION

1.3.2 INSTALLABLE OPTION TABLE

Copier options

Option Adonis-C1b Adonis-C1c Note

ARDF Platen Cover Paper Tray Unit LCT 1-bin Tray Bridge Unit 1,000-sheet Finisher

3,000-sheet Finisher Punch Unit External Output Tray

Key Counter Bracket Expansion Box

Printer options

= Available,

¢¢ ¢¢ ¢¢

¢¢ ¢¢

¢¢

= Requires another option, X = Not available

D D

Requires the paper tray unit.

Requires the paper tray unit and bridge unit.

Requires the 3000-sheet finisher.

Requires the bridge unit.

It is required only when the fax option and/or printer option is installed.

Overall

Information

Option Adonis-C1b Adonis-C1c Note

PostScript Kit Hard Disk Network Interface

Board Mailbox Mailbox Bridge Unit RAM SIMM

= Available,

¢¢ ¢¢

¢¢

D D

¢¢

D D

= Requires another option

Requires the paper tray unit. Requires the mailbox.

Fax options and scanner kits

All options for the fax unit are available when the fax unit has been installed.

Relationship between main machine, mailbox, and finisher

= Available, X = Not available

Model Mailbox 1000- sheet Finisher 3000-sheet Finisher

Adonis-C1b

Adonis-C1c

Installed

Not Installed

Installed

Not Installed

¢¢

1-7

MECHANICAL COMPONENT LAYOUT 14 January, 2000

1.4 MECHANICAL COMPONENT LAYOUT

321 654 987

40 39

38 37

11 12 13 14 15 16 17 18 19 20 21

23 24 25 26

1-8

29 28

31 3033 3235 34

A284V503.WMF

14 January, 2000 PAPER PATH

1. Exposure Glass

2. 2nd Mirror

3. Original Width Sensors

4. 1st Mirror

5. Exposure Lamp

6. Original Length Sensors

7. Lens

8. SBU

9. Scanner Motor

10. Hot Roller

11. Entrance Sensor

12. Inverter Gate

13. Inverter Roller

14. Pressure Roller

15. Transfer Belt Cleaning Blade

22. By-pass Tray

23. Pick-up Roller

24. Paper End Sensor

25. Paper Feed Roller

26. Separation Roller

27. Upper Relay Roller

28. Feed Roller

29. Separation Roller

30. Pick-up Roller

31. Bottom Plate

32. Development Unit

33. Charge Roller

34. Fq Mirror

35. Barrel Toroidal Lens (BTL)

36. Polygonal Mirror Motor

Overall

Information

16. Upper Transport Roller

17. Transfer Belt

18. OPC Drum

19. Registration Roller

20. Lower Transport Roller

21. Exit Sensor

37. Laser Unit

38. Toner Supply Bottle Holder

39. Exit Junction Gate

40. Exit Roller

41. Paper Exit Sensor

42. 3rd Mirror

1.5 PAPER PATH

The paper path is the same as for NAD machines.

1.6 DRIVE LAYOUT

The drive layout is the same as for NAD machines.

1-9

ELECTRICAL COMPONENT DESCRIPTIONS 14 January, 2000

1.7 ELECTRICAL COMPONENT DESCRIPTIONS

Refer to the electrical component layout and the point-to-point diagram on the waterproof paper in the pocket for the locations of these components.

Symbol

Printed Circuit Boards

PCB1 58

PCB2 55

PCB3 61

PCB4 62 PCB5 63 PCB6 9

PCB7 7

PCB8 11 PCB9 4 Lamp Stabilizer Provides dc power to the exposure lamp.

PCB10 19 PCB11 54 PCB12 65

Index

No.

Description Note

BICU (Base Engine & Image Control Unit) PSU (Power Supply Unit)

IOB (Input/Output Board)

Paper Feed Control (PFB) High Voltage Supply Supplies high voltage to the drum charge

SBU (Sensor Board Unit) SIB (Scanner Interface Board) Operation Panel Controls the LCD and LED matrix and

LDDR (Laser Diode Driver) SIFB (Scanner Interface Board) Main (Duplex)

Controls all copier functions both directly and through other control boards. Provides dc power to the system and ac power to the fusing lamp and optional heaters. Controls the mechanical parts of the printer (excluding the paper feed section), and the fusing lamp power. Controls the mechanical parts of all paper feed sections.

roller, development roller, and transfer belt. Contains the CCD, and outputs a video signal to the BICU board. Controls the scanner carriages and passes signals from the scanner unit to the BICU board.

monitors the key matrix. Controls the laser diode. Passes signals between the SBU and BICU

boards. Controls the duplex unit and communicates with the copier.

Motors

M1 35 Main Drives the main body components. M2 8 Scanner Drive Drives the 1st and 2nd scanners. M3 45 Tray Lift Raises the bottom plate in the paper tray. M4 22 Polygonal Mirror Turns the polygonal mirror.

M5 20 M6 36 Cooling Fan Removes heat from the main PCBs.

M7 37 Exhaust Fan Removes heat from around the fusing unit. M8 34 M9 56 PSU Cooling Fan Removes heat from the PSU.

M10 64 Inverter (Duplex) Drives the duplex inverter roller. M11 66

LD Positioning

Toner Supply Rotates the toner bottle to supply toner to the

Transport (Duplex) Drives the duplex upper and lower transport

Rotates the LD unit to adjust the LD beam pitch when a different resolution is selected.

development unit.

rollers.

1-10

14 January, 2000 ELECTRICAL COMPONENT DESCRIPTIONS

Symbol

Index

No.

Description Note

Sensors

S1 2

Scanner Home Position

Informs the CPU when the 1st and 2nd scanners are at the home position.

Platen Cover Informs the CPU whether the platen cover is

S2 3

up or down (related to APS/ARE functions). ARE: Auto Reduce and Enlarge

S3 12 S4 5 S5 6 S6 21 S7 17

Original Width Detects the width of the original. This is one

of the APS (Auto Paper Select) sensors.

Original Length-1 Detects the length of the original. This is one

of the APS (Auto Paper Select) sensors.

Original Length-2 Detects the length of the original. This is one

of the APS (Auto Paper Select) sensors. LD Unit Home Position

Informs the CPU when the LD unit is at the

home positon. Toner Density (TD) Detects the amount of toner inside the

development unit.

S8 24 Paper Exit Detects misfeeds.

Registration Detects the leading edge of the copy paper

S9 27

to determine the stop timing of the paper

feed clutch, and detects misfeeds. Image Density (ID) Detect s the density of various patterns and

S10 26

the reflectivity of the drum for process

control.

S11 28 S12 30 S13 29 S14 31

Upper Paper Height Detects when the paper in the upper paper

tray is at the feed height. Lower Paper Height Detects when the paper in the lower paper

tray is at the feed height. Upper Paper End Informs the CPU when the upper paper tray

runs out of paper. Lower Paper End Informs the CPU when the lower paper tray

runs out of paper.

S15 33 Upper Relay Detects misfeeds. S16 32 Lower Relay Detects misfeeds.

S17 48 S18 46 S19 38 S20 18

S21 61

Upper Tray Informs the CPU whether the upper paper

tray is set into the machine or not. Lower Tray Informs the CPU whether the lower paper

tray is set into the machine or not. Transfer Belt Position Informs the CPU of the current position of the

transfer belt unit. Toner Overflow Detects toner overflow in the toner collection

tank. Duplex Entrance

Detects the trailing edge of the copy paper to

turn on the inverter gate solenoid and turn on

the inverter motor in reverse. Checks for

misfeeds.

S22 67 Exit (Duplex) Checks for misfeeds. S23 68

Cover Guide (Duplex) Det ects whether the cover guide is opened

or not.

Overall

Information

1-11

ELECTRICAL COMPONENT DESCRIPTIONS 14 January, 2000

Symbol

S24 69

S25 72

Switches

SW1 43

SW2 49

SW3 51

SW4 52

SW5 10 SW6 62

Index

No.

Description Note

Paper End (By-pass) Paper Size Sensor Board

Informs the copier when the by-pass tray

runs out of paper.

Detects the paper width for the by-pass tray

unit. (By-pass)

Right Lower Cover Detects whether the right lower cover is open

or closed. Right Upper Cover Cut the +5VLD and +24V dc power line and

detects whether the right upper cover is open

or closed. Main Power Switch Supplies power to the copier. If this is off,

there is no power supplied to the copier. Front Cover Safety Cuts the +5VLD and +24V dc power line and

detects whether the front cover is open or

not. Operation Switch Provides power for machine operation. The

machine still has power if this switch is off. Duplex Unit

Detects whether the duplex unit is opened or

not.

Magnetic Clutches

CL1 3 9

Transfer Belt Controls the touch and release movement of

the transfer belt unit.

CL2 40 Registration Drives the registration rollers. CL3 4 4 Relay Drives the relay rollers. CL4 41 Upper Paper Feed Starts paper feed from the upper paper tray. CL5 42 Lower Paper Feed Starts paper feed from the lower paper tray.

CL6 7 1

Paper Feed (By-pass)

Starts paper feed from the by-pass tray unit.

Solenoids

SOL1 63 SOL2 70 SOL3 73 SOL4 74

Inverter Gate (Duplex) Pick-up (By-pass) Exit Junction Gate (Interchange unit) Duplex Junction Gate (Interchange unit)

Controls the duplex inverter gate.

Moves the pick-up roller for the by-pass feed

tray to contact the paper.

Controls the exit junction gate.

Controls the duplex junction gate.

Lamps

L1 13

Exposure

Applies high intensity light to the original for

exposure.

L2 16 Fusing Provides heat to the hot roller. L3 25

Quenching Neutralizes any charge remaining on the

drum surface after cleaning.

1-12

14 January, 2000 ELECTRICAL COMPONENT DESCRIPTIONS

Symbol

Index

Heaters

H1 1

H2 47

Thermistors

TH1 14

Thermofuses

TF1 15

Counters

CO1 50

CO2 N/A

No.

Description Note

Optics Anticondensation (option) Tray (option)

Turns on when the main power switch is off

to prevent moisture from forming on the

optics.

Turns on when the main power switch is off

to keep paper dry in the paper tray.

Fusing Monitors the temperature at the central area

of the hot roller.

Fusing Provides back up overheat protection in the

fusing unit.

Total Keeps track of the total number of prints

made. Key (option)

Used for control of authorized use. If this

feature is enabled for copying, copying will

be impossible until it is installed. It can also

be enabled for fax and printer modes

separately.

Overall

Information

Others

LSD 23

Laser Synchronization Detector

Detects the laser beam at the start of the

main scan.

1-13

BOARD STRUCTURE 14 January, 2000

1.8 BOARD STRUCTURE

1.8.1 BLOCK DIAGRAM

SBU

Exposure

Lamp

Image data

Signal data

Lamp

Stabilizer

Scanner

Motor

APS

Sensors

Op.

Panel

ARDF

SIFB

SIB

BICU

Driver

Polygon

Motor

Mother

Board

PSU

HDD

LSD

Fax Controller

Printer Controller

Scanner Controller

Duplex

Unit

1-bin Tray

Finisher

Main

Bridge Unit

IOB

Counter Clutches

: Standard : Option

Fans Sensors

Motor

High

Voltage

Supply

Paper Feed

Controller

(PFB)

Paper

Tray Unit

Position

Motor

LCT

A284V501.WMF

LD H.P Sensor

Sensors

Clutches

1-14

14 January, 2000 BOARD STRUCTURE

1.8.2 DESCRIPTIONS

1. BICU (Base Engine and Image Control Unit)

This is the main board. It controls the following functions.

Engine sequence

Timing control for peripherals

Image processing, video control

Operation control

Application boards (fax, printer, scanner)

2. IOB (Input/Output Board)

The IOB handles the following functions.

Drive control for the sensors, motors, and solenoids in the printer engine

PWM control for the high voltage supply board

Serial interface with peripherals

Fusing control

Overall

Information

3. SBU (Sensor Board Unit)

The SBU receives analog signals from the CCD and converts them into digital signals.

4. SIB (Scanner Interface Board)

This board controls the scanner motor and passes signals between the BICU board and the component parts of the scanner unit.

5. SIFB (Scanner Interface Board)

This board interfaces the SBU with the BICU.

6. Mother Board (Option)

This board interfaces the BICU with the fax controller, printer controller and/or the scanner kit. The mother board is part o f the ex pansi on box option.

1-15

14 January, 2000 SCANNING

2. DETAILED DESCRIPTIONS

2.1 SCANNING

2.1.1 OVERVIEW

For NAD

A284D501.WMF A284D502.WMF

For Adonis-C1

The mechanical components of the scanner unit are the same as for the NAD. However, the following items have been changed because this machine scans at 600 dpi.

The lens is larger

Because the lens size has been changed, the drive layout has been changed as

shown in the above illustration (note the position of the scanner drive motor).

Image processing is slightly different

To reduce the electrical noise generated by the high frequency image data

signal, a shield plate has been added to the lens block unit.

Detailed

Descriptions

2-1

IMAGE PROCESSING 14 January, 2000

2.2 IMAGE PROCESSING

2.2.1 OVERVIEW

SBU

CCD

SIFB

Memory

Control

MSU

BICU

HDD

Fax Controller

Printer Controller

Scanner Controller

A284D531.WMF

Drum

LDDR

Driver

Controller

(GAVD)

FCI

IPU

The image data flows similarly to the NAD machine. The differences are the following.

The video data go to the IPU chip through only the SIFB.

The MSU circuit is on the BICU board.

The image processing is changed.

2-2

14 January, 2000 IMAGE PROCESSING

2.2.2 SBU

E O

CCD

Analo

Processing IC

D/A

P/H

SBU

A/D

Driver

SIFB

Driver

SIB

BICU

IPU

A283D500.WMF

The CCD has two output lines, one each for odd and even pixels, to the analog processing IC. The analog processing IC performs the zero clamp and signal amplification. The analog signals are then converted to 8-bit signals by the A/D converter. The digital signals go to the driver, where they are converted to serial data. Then, these go to the SIFB. In the SIFB, the data is converted to parallel signals (8-bit x 2) by the driver, and these go to the IPU chip.

Detailed

Descriptions

The SIB controls the circuits on the SBU (such as those for shading).

2-3

IMAGE PROCESSING 14 January, 2000

2.2.3 IMAGE PROCESSING

Overview

The differences in the image processing from the NAD are as follows.

600 dpi scanning and printing

Only grayscale processing mode is available.

The copy quality for the low contrast image is improved (the filters and the g table

have been modified).

To consist with gradation and resolution in the text mode, using the error

diffusion processing.

Image Processing Path

Scanning Image Processing Printing

Copy Mode

Letter Magnification

Letter/Photo Magnification

Generation Magnification

Low Density

Original

Input Correction

Auto

Shading

Auto

Shading

Auto

Shading

Auto

Shading

Auto

Shading

Magnification

Background Erase

Background/ Independent

Dot Erase

Background/ Independent

Dot Erase

Filtering

MTF

(Strong)

MTF

(Weak)

Smoothing

MTF/

Line width

correction

MTF

(Strong)

Photo mode: MTF can be used instead of smoothing (SP4-904-3).

ID Control

Corre-

ction

Corre-

ction

Corre-

ction

Corre-

ction

Corre-

ction

Gradation

Error

Diffusion

Error

Diffusion

DitheringPhoto Magnification

Error

Diffusion

Error

Diffusion

A284D533.WMF

2-4

14 January, 2000 IMAGE PROCESSING

SP modes for each image processing mode

Copy

mode

Letter

Letter/ Photo

Photo

Copied Original

Low Density Original

Background

erase

SP4903-34

Background erase level

SP4903-28

Independent dot erase level

SP4903-35

Background erase level

SP4903-30

Independent dot erase level

SP4903-36

Background erase level

SP4903-37

Background erase level

SP4903-32

Independent dot erase level

SP4903-31

Independent dot erase level

Filtering Magnification Gradation

SP4903-11~14, 41~44

SP2909-1

Main scan mag. MTF filter coefficient

SP4903-20~23, 50~53

MTF filter strength

SP4903-17, 47

MTF filter

SP2909-1

Main scan mag. coefficient

SP4903-25, 55

MTF filter strength

SP4904-3

Filter type

SP2909-1

Main scan mag.

SP4904-2

Dither matrix type (smoothing or MTF)

SP4903-16

Smoothing filter coefficient

SP4903-15, 48

MTF filter coefficient

SP4903-24, 54

MTF filter strength

SP4903-19, 46

MTF filter coefficient

SP2909-1

Main scan mag.

SP4904-6

Line width

correction type

SP4903-27, 57

MTF filter strength

SP4903-18, 45

MTF filter

SP2909-1

Main scan mag.

coefficient

SP4903-26, 56

MTF filter strength

Detailed

Descriptions

2-5

IMAGE PROCESSING 14 January, 2000

Filtering

There are two software filters: MTF and smoothing, as in the NAD. There are four MTF filter types: filter strength for main scan direction, filter strength for sub scan direction, filter coefficient for main scan direction, and filter coefficient for sub scan direction. These filters can be adjusted with SP mode.

When the filter is stronger in the main scan direction, lines parallel to the feed direction are emphasized. When the filter is stronger in the sub scan direction, lines at right angles to the feed direction are emphasized.

The relationship between the filter coefficient and the filter strength is as follows. MTF filter coefficient

(Weak) (Strong) 0 ® 1 ® 2 ® 3 ® 4 ® 5 ® 6 ® 7 ® 8 ® 9 ® 10 ® 11 ® 12 ® 13 ® 14 ® 15

MTF filter strength

(Weak) 0 ® 1 ® 2 ® 3 ® 4 ® 5 ® 6 ® 7 (Strong)

Smoothing filter coefficient

(Weak) 0 ® 1 ® 2 ® 3 ® 4 ® 5 ® 6 ® 7 (Strong)

It is difficult to explain how to use the filter coefficient and filter strengths to control MTF and smoothing. Refer to the following charts to determine how to make the filters weaker or stronger. The values in the bold columns are the default settings.

Text mode: 25 ~ 64 % MTF strength Strong

(Sharp)

Main scan: Filter coefficient (SP4903-11)

Sub scan: Filter coefficient (SP4903-41)

Main scan: Filter Strength (SP4903-20)

Sub scan: Filter Strength (SP4903-50)

9 15141210 9 9

11 13 13 12 12 12 10

3 22222 2

¬¬

Normal

®®

Weak (Soft)

2-6

14 January, 2000 IMAGE PROCESSING

Text mode: 65 ~ 154 % MTF strength

Strong

(Sharp)

¬¬

Normal

®®

Weak (Soft)

Main scan: Filter coefficient

9 9 15 14 12 10 9

(SP4903-12) Sub scan:

Filter coefficient

13 11 13 13 13 13 13

(SP4903-42) Main scan:

Filter Strength

3 32222 2

(SP4903-21) Sub scan:

Filter Strength

3 32222 2

(SP4903-51)

Text mode: 155 ~ 400 % MTF strength

Strong

(Sharp)

¬¬

Normal

®®

Weak (Soft)

Main scan: Filter coefficient

10 9 9 15 14 12 10

(SP4903-13) Sub scan:

Filter coefficient

13 13 11 13 13 13 13

(SP4903-43) Main scan:

Filter Strength

3 33222 2

(SP4903-22) Sub scan:

Filter Strength

3 33222 2

(SP4903-52)

Detailed

Descriptions

Text mode: Notch 1 (lightest image density setting), 65 ~ 154 % MTF strength

Strong

(Sharp)

¬¬

Normal

Main scan: Filter coefficient

9 9 15 14 12 10 9

(SP4903-14) Sub scan:

Filter coefficient

13 11 13 13 13 13 13

(SP4903-44) Main scan:

Filter Strength

4 43333 3

(SP4903-23) Sub scan:

Filter Strength

4 43333 3

(SP4903-53)

2-7

®®

Weak (Soft)

IMAGE PROCESSING 14 January, 2000

Photo mode: (when MTF filtering is selected with SP4903-3) MTF strength

Strong

(Sharp)

¬¬

Normal

®®

Weak (Soft)

Main scan: Filter coefficient

9 9 15 14 12 10 9

(SP4903-15) Sub scan:

Filter coefficient

13 11 13 13 13 13 13

(SP4903-48) Main scan:

Filter Strength

2 21111 1

(SP4903-24) Sub scan:

Filter Strength

2 21111 1

(SP4903-54)

Text/Photo mo de MTF strength

Strong

(Sharp)

¬¬

Normal

®®

Weak (Soft)

Main scan: Filter coefficient

9141098109

(SP4903-17) Sub scan:

Filter coefficient

10 13 13 10 9 13 10

(SP4903-47) Main scan:

Filter Strength

2 11110 0

(SP4903-25) Sub scan:

Filter Strength

2 11110 0

(SP4903-55)

2-8

14 January, 2000 IMAGE PROCESSING

Low density mode MTF strength

Strong

(Sharp)

¬¬

Normal

®®

Weak (Soft)

Main scan: Filter coefficient

14 12 10 9 9 14 10

(SP4903-18) Sub scan:

Filter coefficient

13 13 13 13 10 13 13

(SP4903-45) Main scan:

Filter Strength

3 33332 2

(SP4903-26) Sub scan:

Filter Strength

3 33332 2

(SP4903-56)

Copied original mode MTF strength

Strong

(Sharp)

¬¬

Normal

®®

Weak (Soft)

Main scan: Filter coefficient

9 9 12 10 9 9 14

(SP4903-19) Sub scan:

Filter coefficient

13 10 13 13 13 10 13

(SP4903-46) Main scan:

Filter Strength

3 32222 1

(SP4903-27) Sub scan:

Filter Strength

3 32222 1

(SP4903-57)

Detailed

Descriptions

2-9

+ 155 hidden pages

Ricoh Aficio350, Aficio450 Service Manual s af350e

IMPORTANT SAFETY NOTICES

PREVENTION OF PHYSICAL INJURY

HEALTH SAFETY CONDITIONS

OBSERVANCE OF ELECTRICAL SAFETY STANDARDS

LASER SAFETY

TABLE OF CONTENTS

1. OVERALL MACHINE INFORMATION

1.1 SPECIFICATIONS

1.2 PAPER EXIT TRAY SELECTION

1.3 MACHINE CONFIGURATION

1.3.1 SYSTEM COMPONENTS

1.3.2 INSTALLABLE OPTION TABLE

Copier options

Printer options

Fax options and scanner kits

Relationship between main machine, mailbox, and finisher

1.4 MECHANICAL COMPONENT LAYOUT

1.5 PAPER PATH

1.6 DRIVE LAYOUT

1.7 ELECTRICAL COMPONENT DESCRIPTIONS

1.8 BOARD STRUCTURE

1.8.1 BLOCK DIAGRAM

1.8.2 DESCRIPTIONS

2. DETAILED DESCRIPTIONS

2.1 SCANNING

2.1.1 OVERVIEW

2.2 IMAGE PROCESSING

2.2.1 OVERVIEW

2.2.2 SBU

2.2.3 IMAGE PROCESSING

Overview

Image Processing Path

SP modes for each image processing mode

Filtering