Ricoh af 650 Service Manual s af650

SP5

(Machine Code: A229)

SERVICE MANUAL

TS Dept. Imaging System Business Group

RICOH Co., LTD.

IIMPORTANT 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 NOTES FOR DISPOSAL

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 order to dispose 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.

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:

June 30, 1998 SPECIFICATIONS

1. OVERALL MACHINE INFORMATION

1.1 SPECIFICATIONS

1.1.1 COPIER ENGINE

Configuration: Console Copy Process: Dry electrostatic transfer system Originals: Sheet/Book Original Size: Maximum A3/11" x 17"

Minimum B6, 5½”x 8 ½” (using ADF) Original Alignment: Rear left corner Copy Paper Size: Maximum

A3/11" x 17" (1st/2nd Tray, By-pass)

B4/8 ½” x 14” (3rd Tray)

Minimum

B5/8 ½” x 11” lengthwise (1st Paper Tray)

A5/5

B5/8 ½” x 11” (3rd Paper Tray)

A6/5

Tandem Paper Tray (1st Tray)

A4/B5/8 ½” x 11” sideways only

1/2

" x 8 " x 8

" sideways (2nd Tray)

1/2

" lengthwise (By-pass)

1/2

Overall

Information

Duplex Copying: Maximum A3/11" x 17"

Minimum A5/5

1/2

" x 8

" lengthwise

1/2

Copy Paper Weight: Paper tray: 52.3 ~ 127.9 g/m2, 14 ~ 34 lb

Bypass feed table: 52.3 ~ 163 g/m2, 17 ~ 43 lb

Duplex copying: 64 ~ 104.7 g/m2, 17 ~ 28 lb Reproduction Ratios: 6 reduction and 5 enlargement

Metric Version Inch Version

Enlargement 400%

200% 141% 122%

115% Full Size 100% 100% Reduction 93%

82% 75% 71% 65% 50%

400% 200% 155% 129% 121%

93% 85% 78% 73% 65% 50%

1-1

SPECIFICATIONS June 30, 1998

Zoom: 32 ~ 400% Copy Speed: Max. 65 cpm (A4 / 8 ½” x 11” sideways) Resolution: Scanning: 400 dpi

Printing: 400 dpi

600 dpi (Printer Mode Only) Gradation: 256 levels Warm-up Time: Less than 330 s (from Off-mode)

Less than 30 s (from Low Power Mode) First Copy Time:

(1st Tray)

Less than 3.7 s (Face up mode)

Less than 5.5 s (Face down mode) Copy Number Input: Ten-key pad, 1 to 999 Copy Paper Capacity: Tray 1: 1000 sheets(when used as a tandem tray)

Tray 2: 550 sheets

Tray 3 (LCT): 1500 sheets

By-pass Tray: 50 sheets Copy Tray Capacity:

(Output Tray)

A4/8 ½” x 11” : 500 sheets (100 µm thickness paper)

A3/11" x 17" : 250 sheets Memory Capacity: RAM: 12MB

HDD: 1.7GB Toner Replenishment: Cartridge exchange (1220g/ cartridge) Toner Yield: 40k copies

(A4 sideways, 6% full black, 1 to 3 copying, including

toner recycling ratio 20%) Power Source: North America:

120V, 60Hz, 20A

Europe/Asia:

220 ~ 240 V, 50Hz/60Hz, 10A

1-2

June 30, 1998 SPECIFICATIONS

Power Consumption: A229 copier (120 V Model)

Copier only Full system*

Warm-up About 1.290 kW About 1.310 kW

Stand-by About 0.235 kW About 0.255 kW

Copying About 1.560 kW About 1.650 kW

Maximum Less than 1.75 kW Less than 1.75 kW

Energy Saver About 0.210 kW About 0.230 kW

Low Power About 0.205 kW About 0.225 kW

Off Mode About 0.017 kW About 0.017 kW

A229 copier (220 to 240 V Model)

Copier only Full system*

Warm-up About 1.250 kW About 1.270 kW

Stand-by About 0.245 kW About 0.260 kW

Copying About 1.500 kW About 1.600 kW

Maximum Less than 1.75 kW Less than 1.75 kW

Energy Saver About 0.220 kW About 0.235 kW

Low Power About 0.215 kW About 0.230 kW

Off Model About 0.017 kW About 0.017 kW

Overall

Information

Noise Emission: Sound Power Level:

Stand-by Less than 50 dB(A) Less than 50 dB(A)

Copying (ADF 1 to 1) Less than 72 dB(A) Less than 72 dB(A)

Copying (From Memory) Less than 71 dB(A) Less than 71 dB(A)

Sound Pressure Level:

Stand-by Less than 40 dB(A) Less than 40 dB(A)

Copying (ADF 1 to 1) Less than 60 dB(A) Less than 61 dB(A)

*Full System:

Mainframe with LCT and Finisher

The measurements were made in accordance with ISO 7779 at

the operator position.

Copier only Full system

The measurements were made in accordance with ISO 7779.

Copier only Full system

Copying (From Memory) Less than 59 dB(A) Less than 59 dB(A)

1-3

SPECIFICATIONS June 30, 1998

Dimensions: (W x D x H)

Weight: 188 kg (without options)

Optional Equipment:

690 x 750 x 1138 mm (27.2” x 29.5” x 44.8”)

(without ADF right exit tray, and options)

• Output tray (A814-01)

• Finisher (A697)

• Large capacity tray (A698)

• Punch unit (A812)

1.1.2 ADF

Original Size: Normal Original Mode:

A3 to B6, DLT to HLT

Thin Original Mode:

A3 to B6 sideways, DLT to HLT

Duplex Original Mode:

A3 to B5, DLT to HLT

Original Weight: Normal Original Mode: 52 ~ 128 g/m2, 14 ~ 34 lb

Thin Original Mode: 40 ~ 128 g/m2, 11 ~ 34 lb

Duplex Original Mode: 52 ~ 105 g/m2, 14 ~ 28 lb Table Capacity: 100 sheets (80 g/m2, 20 lb) Original Standard Position: Rear left corner Separation: FRR Original Transport: One flat belt Original Feed Order: From the top original Power Source: DC 24V from the copier Power Consumption: 70 W Dimensions (W x D x H): 680 x 529.5 x 150 mm

1-4

June 30, 1998 MACHINE CONFIGURATION

1.2 MACHINE CONFIGURATION

Overall

Information

Item Machine Code No.

Mainframe A229 3 Output Tray A814 - 01 2 Finisher A697 1 Large Capacity Tray A698 4

Punch Unit (Option for Finisher)

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

A229V501.WMF

1-5

MECHANICAL COMPONENT LAYOUT June 30, 1998

1.3 MECHANICAL COMPONENT LAYOUT

1.3.1 COPIER ENGINE

45 44

43 42 41

40 39

41014 15

1211

17 18 19 20 21 22

23 24

25 26 27 28 29

1-6

31 32

A229V507.WMF

343536

June 30, 1998 MECHANICAL COMPONENT LAYOUT

1. 3rd Mirror

2. 2nd Mirror

3. 1st Mirror

4. Exposure Lamps

5. LD Unit

6. Cylindrical Lens

7. Polygonal Mirror

8. Cleaning Brush

9. Quenching Lamp

10. Barrel Toroidal Lends (BTL)

11. F-theta Mirror

12. SBU

13. Charge Corona Unit

14. Shield Glass

15. Laser Synchronization Detector

16. Optics Cooling Fan Motor

31. Separation Roller

32. Tray 1 (Tandem Tray)

33. Tray 2 (550-sheet Tray)

34. Tray 3 (1500-sheet lage capacity tray)

35. Pick-up Roller

36. Duplex Feed Roller

37. Duplex Transport Rollers

38. Reverse Trigger Roller

39. Inverter Unit Paper Exit Roller

40. Inverter Feed Roller

41. Pressure Roller

42. Transport Rollers

43. Paper Exit Rollers

44. Curl Correction Roller

45. Hot Roller

Overall

Information

17. Drum Cleaning Blade

18. Drum Potential Sensor

19. Drum

20. Pick-off Pawl

21. Development Unit

22. TD Sensor

23. Pick-up Roller

24. Feed Roller (By-pass Tray)

25. Separation Roller

26. Registration Rollers

27. Transfer Belt Unit

28. Relay Roller

29. Vertical Transport Rollers

30. Feed Roller

1-7

MECHANICAL COMPONENT LAYOUT June 30, 1998

1.3.2 ADF

A229V506.WMF

1. Separation Roller

2. Feed Belt

3. Pick-up Roller

4. Bottom Plate

5. Original Tray

6. Upper Tray Exit Roller

12. Exit Gate

13. Inverter Roller

14. Exit Sensor

15. Upper Exit Tray

16. Transport Belt

17. Registration Sensor

7. Inverter Gate

8. Inverter Guide Roller

9. Inverter Sensor

10. Right Tray Exit Roller

11. Right Exit Tray

18. Lower Transport Roller

19. Width Sensor

20. Upper Transport Roller

21. Entrance Sensor

1-8

June 30, 1998 PAPER PATH

1.4 PAPER PATH

Overall

Information

1. ADF

2. By-pass Tray

3. Optional LCT

4. Tray 3 (1500-sheet LCT)

5. Tray 2 (550-sheet Tray)

6. Tray 1 (Tandem Tray)

A229V504.WMF

7. Duplex Unit

8. Finisher

9. Inverter Unit

10. Shift Tray

11. Upper Tray

1-9

COPY PROCESS June 30, 1998

1.5 COPY PROCESS

A229V508.WMF

A229V510.WMF

1. EXPOSURE

Two xenon lamps expose the original. Light reflected from the original passes to the CCD, where it is converted into an analog data signal. This data is converted to a digital signal, processed, and stored in the memory. At the time of printing ,the data is retrieved and sent to the laser diode. For multi-copy runs, the original is scanned once only and stored to the hard disk.

2. DRUM CHARGE

An OPC (organic photoconductor) drum is used in this machine. In the dark, the charge corona unit gives a negative charge to the drum. The grid plate ensures that corona charge is applied uniformly. The charge remains on the surface of the drum because the OPC layer has a high electrical resistance in the dark.

3. LASER EXPOSURE

The processed data from the scanned original is retrieved from the hard disk and transferred to the drum by two laser beams, which form an electrostatic latent image on the drum surface. The amount of charge remaining as a latent image on the drum depends on the laser beam intensity, which is controlled by the SBICU board.

1-10

June 30, 1998 COPY PROCESS

4. DRUM POTENTIAL SENSOR

The drum potential sensor detects the electric potential on the drum to correct various process control elements.

5. DEVELOPMENT

The magnetic developer br ush on the development rollers comes in contac t w i th the latent image on the drum surface. Toner particles are electrostatically attracted to the areas of the drum surface where the laser reduced the negative charge on the drum.

6. IMAGE TRANSFER

Paper is fed to the area between the drum surface and the transfer belt at the proper time to align the copy paper and the developed image on the drum. Then, the transfer bias roller applies a high positive charge to the reverse side of the paper through the transfer belt. This positive charge pulls the toner particles from the drum to the paper. At the same time, the paper is electrically attracted to the transfer belt.

7. PAPER SEPARATION

Overall

Information

Paper separates from the drum as a result of the electrical attraction between the paper and the transfer belt. The pick-off pawls also help separate the paper from the drum.

8. ID SENSOR

The laser forms a sensor pattern on the drum surface. The ID sensor measures the reflectivity of the pattern. The output signal is one of the factors used for toner supply control.

9. CLEANING

The cleaning brush removes toner remaining on the drum after image transfer and the cleaning blade scrapes off all remaining toner.

10. QUENCHING

The light from the quenching lamp electrically neutralizes the charge on the drum surface.

1-11

DRIVE LAYOUT June 30, 1998

1.6 DRIVE LAYOUT

1.6.1 COPIER ENGINE

(

)

1. Drum Motor

2. Scanner Motor

3. Fusing/Duplex Motor

4. Toner Recycling Clutch

5. Paper Feed Motor

6. Toner Collection Motor

7. Registration Motor

8. Relay Clutch

9. By-pass Feed Motor

10. By-pass Feed Clutch

11. Development Motor

1-12

Cleaning Unit

Scanner Unit

Transfer Belt Unit

Fusing Unit

Duplex Unit

Paper Feed Units

Toner Hopper

(

Development Unit

)

Drum

A229V505.WMF

June 30, 1998 DRIVE LAYOUT

1.6.2 ADF

Overall

Information

C229V511.WMF

1. Pick-up Motor

2. Bottom Plate Motor

3. Feed-in Motor

4. Transport Motor

5. Upper Exit Roller

6. Feed-out Motor

7. Right Exit Roller

8. Transport Belt

9. Lower Transport Roller

10. Upper Exit Roller

11. Separation Roller

12. Feed Belt

13. Pick-up Roller

1-13

ELECTRICAL COMPONENT DESCRIPTION June 30, 1998

1.7 ELECTRICAL COMPONENT DESCRIPTION

Refer to the electrical component layout on the reverse side of the point-to-point diagram for the location of the components using the symbols and index numbers.

1.7.1 COPIER ENGINE

Symbol Name Function

Motors

M1 Scanner Drives the 1st and 2nd. 17 M2 Polygonal Mirror Turns the polygonal mirror. 25 M3 LD Positioning

M4 Drum Drives the drum and cleaning unit. 39 M5 Development Drives the development unit. 40 M6 Toner Supply Rotates the toner bottle to supply

M7 M8 Fusing/Duplex Drives the fusing unit, duplex unit,

M9 Toner Collection Transports the collected toner to the M10 Toner Recycling M11 Paper Feed Drives all feed and transport rollers in M12 1st Tray Lift Raises and lowers the bottom plate in M13 2nd Tray Lift Raises the bottom plate in the 2nd M14 M15 By-pass Feed Drives the by-pass feed rollers. 43

M16 Registration Drives the registration rollers. 42 M17 Rear Fence Drive Moves the paper stack in the left

M18 Side Fence Drive Opens and closes the front and rear M19 Jogger M20 Optics Cooling Fan Removes heat from the optics unit. 24

M21 M22 Exhaust Fan Removes heat from around the fusing

Charge Corona Wire Cleaner

3rd Tray Lift Raises and lowers the bottom plate in

Polygonal Mirror Motor Cooling Fan

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

toner to the development unit. Drives the charge corona wire

cleaner. inverter unit, and paper exit rollers. toner collection bottle.

Drives the air pump to send recycled toner to the development unit.

the paper tray unit. the 1st paper tray. paper tray. the 3rd paper tray.

tandem tray to the right tandem tray. side fences of the tandem tray.

Drives the jogger fences to square the paper stack in the duplex unit.

Removes heat from around the polygonal mirror motor.

unit.

Index

No.

48 90 37

8 46 44 45

135

72 77 80

49 38

1-14

June 30, 1998 ELECTRICAL COMPONENT DESCRIPTION

Symbol Name Function

M23 Fusing Fan Removes heat from around the fusing

unit.

M24 Duplex Cooling Fan Removes heat from around the duplex

unit.

M25 PSU Cooling Fan Removes heat from around the PSU. 5 9

Magnetic Clutches

MC1 Toner Supply Turns the toner supply roller to supply

toner to the development unit. MC2 Toner Recycling Drives the t oner recycling unit. 2 MC3 1st Paper Feed Starts paper feed from tray 1. 112 MC4 2nd Paper Feed Starts paper feed from tray 2. 115 MC5 3rd Paper Feed Starts paper feed from tray 3. 12 MC6 By-pass Feed Starts paper feed from the by-pass

table. MC7 Duplex Transport

Drives the duplex transport rollers to

transport the paper to the duplex feed

rollers. MC8 Duplex Feed Starts paper feed out of the duplex

tray back into the machine via to the

relay rollers. MC9 1st Vertical Relay Dr ives the 1st vertical tr ansport

rollers.

MC10 2nd Vertical Relay Drives the 2nd vertical transport

rollers.

MC11 3rd Vertical Relay

Drives the 3rd vertical transport

rollers.

MC12 Relay Drives the relay rollers. 103

Index

No.

50 47

100

113 116 119

Overall

Information

Switches

SW1 Main Power

SW2 Operation

SW3 Front Door Safety

Switch 1

SW4

Front Door Safety Switch 2

SW5 Front Door Safety

Switch 3

SW6 Lower Front Door

Safety

SW7 Toner Collection

Bottle Set

SW8 Toner Overflow

Provides power to the machine. If this

11 is off, there is no power supplied to the machine.

Provides power for machine

30 operation. The machine still has power if this switch is off.

Cuts the +5 V LD dc power line. 12 Detects if the front door is open or not,

13 and cuts the +24 V dc power line.

Cuts the +5 V LD dc power line. 14 Cuts the +24 V dc power line. 10 Detects if the toner collection bottle is

set or not. Detects when the toner collection

bottle is full.

1-15

ELECTRICAL COMPONENT DESCRIPTION June 30, 1998

Symbol Name Function

SW9 Paper Size Determines the size of paper in tray 2. 3 SW10 3rd Tray Down Lowers the tray 3 (LCT) bottom plate 136 SW11 By-pass Tray Detects if the by-pass tray is open or

closed.

Solenoids

SOL1 Transfer Belt Lift Controls the up-down movement of

the transfer belt unit.

SOL2 1st Pick-up Controls the up-down movement of

the pick-up roller in tray 1.

SOL3 2nd Pick-up

Controls the up-down movement of the pick-up roller in tray 2.

SOL4 3rd Pick-up Controls the up-down movement of

the pick-up roller in tray 3.

SOL5 By-pass Pick-up Controls the up-down movement of

the pick-up roller for by-pass feed.

SOL6 1st Separation Roller

Controls the up-down movement of the separation roller in tray 1.

SOL7 2nd Separation Roller Controls the up-down movement of

the separation roller in tray 2.

SOL8 3rd Separation Roller Controls the up-down movement of

the separation roller in tray 3.

SOL9 Tandem Lock

Releases the left tandem feed tray so that it can be separated from the right tandem feed tray.

SOL10 Duplex Inverter Gate Moves the junction gate to direct

copies to the duplex tray or to the paper exit.

SOL11 Reverse Roller Controls the up-down movement of

the reverse trigger roller.

SOL12 Guide Plate Opens the guide plate when a paper

misfeed occurs around this area.

SOL13 Inverter Gate

Opens the inverter gate during a duplex job.

Index

No.

92 111 117 121

98 114 118 122

81 102

Sensors

S1 Scanner HP

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

S2 Original Width Detects original width. This is one of

APS (Auto Page Select) sensors.

S3 Original Length 1 Detects original length. This is one of

APS (Auto Page Select) sensors.

S4 Original Length 2

Detects original length. This is one of APS (Auto Page Select) sensors.

S5 LD Unit Home

Position

Informs the CPU when the LD unit is at home position.

S6 Drum Potential Detects the drum surface potential. 88

1-16

June 30, 1998 ELECTRICAL COMPONENT DESCRIPTION

Symbol Name Function

S7 Toner Density (TD) Detects the amount of toner in the

developer.

S8 Image Density (ID) Detects the density of the ID sensor

pattern on the drum.

S9 Toner End Detects toner end. 94

S10

Toner Collection

Monitors the toner collection motor. 9

Motor

S11 Toner Recycling Monitors the toner recycling and

collection unit operation.

S12 1st Paper Feed Controls the 1st paper feed clutch

off/on timing and the 1st pick-up solenoid off timing.

S13 2nd Paper Feed Contr ols the 2nd paper feed clutch

off/on timing and the 2nd pick-up solenoid off timing.

S14 3rd Paper Feed

Controls the 3rd paper feed clutch off/on timing and the 3rd pick-up solenoid off timing.

S15 1st Tray Lift Detects when the paper in tray 1 is at

the correct height for paper feed.

S16 2nd Tray Lift

Detects when the paper in tray 2 is at the correct height for paper feed.

S17 3rd Tray Lift Detects when the paper in tray 3 is at

the correct height for paper feed.

S18 1st Paper End Informs the CPU when tray 1 runs out

of paper.

S19 2nd Paper End

Informs the CPU when tray 2 runs out of paper.

S20 3rd Paper End Informs the CPU when tray 3 runs out

of paper.

S21 By-pass Paper End Informs the CPU that there is no

paper in the by-pass feed table.

S22 1st Paper Near End

Informs the CPU when the paper in tray 1 is almost finished.

S23 2nd Paper Near End Informs the CPU when the paper in

tray 2 is almost finished.

S24 3rd Paper Near End Inf orm s the CPU when the paper in

tray 3 is almost finished.

S25

Rear Fence HP Informs the CPU when the tandem

tray rear fence is in the home position.

S26 Rear Fence Return Informs the CPU when the tandem

tray rear fence is in the return position.

S27

Side Fence Close Detects whether the tandem tray side

fence is closed or not.

S28 Side Fence

Positioning

Informs the CPU when the tandem tray side fences are open.

Index

No.

129

126

125

132 128 123 130 127 124

99 110 131 133

Overall

Information

1-17

ELECTRICAL COMPONENT DESCRIPTION June 30, 1998

Symbol Name Function

S29 Base Plate Down Detects when the bottom plate is

completely lowered to stop the 1st tray lift motor.

S30

Left Tandem Paper End

Informs the CPU when the left tandem tray runs out of paper.

S31 3rd Tray Paper Detects whether there is paper or not

in tray 3.

S32 Tray Down Sensor Informs the CPU when the bottom

plate is completely lowered, to stop the 3rd tray lift motor.

S33 Duplex Entrance

Sensor

Detects the leading and trailing edges of the paper to determine the reverse roller solenoid on or off timing.

S34 Duplex Transport

Sensor 1

S35 Duplex Transport

Sensor 2

S36 Duplex Transport

Sensor 3

S37 Duplex Jogger HP

Detects the position of paper in the duplex unit.

Detects if the duplex jogger fences

are at the home position or not. S38 Relay Detects misfeeds. 104 S39 Registration Detects misfeeds and controls

registration clutch off-on timing. S40 Guide Plate Position Detects whether the registration guide

plate is closed or not. S41 Fusing Exit Detects misfeeds. 107 S42 Exit Detects misfeeds. 108 S43 Tray Paper Limit Detects paper overflow on the output

tray.

Index

No.

73 135 134

106 105

109

PCBs

PCB1 SBICU

Controls all base engine functions both directly and through other control boards.

PCB2 PSU Provides dc power to the system and

ac power to the fusing lamp and heaters.

PCB3 IOB Controls the mechanical parts of the

machine (excluding the scanner unit section), and the fusing lamp.

PCB4 SBU

Contains the CCD, and outputs a

video signal to the SBICU board. PCB5 Scanner Motor Drive Drives the scanner motor. 51 PCB6 Lamp Regu lat or Provides dc power to the exposure

lamp. PCB7 DC/ DC Convert er Generates dc voltages. 19 PCB8 LDDR Controls the laser diodes. 27

1-18

June 30, 1998 ELECTRICAL COMPONENT DESCRIPTION

Symbol Name Function

PCB9 Int erf ace Passes signals and dc supplies from

the PSU and IOB to motors and other

components.

PCB10

Paper Feed Control Board (PFB)

Controls the mechanical parts of all

paper feed sections.

PCB11 Operation Panel 1 Controls the components on the right-

hand side of the operation panel.

PCB12 Operation Panel 2 Controls the components on the left-

hand side of the operation panel.

PCB13 LCD Control Cont rols the LCD. 33 PCB14 By-pass Paper Size

Detects the paper width on the by-

pass tray.

PCB15 Mother (Option) Connects the printer control board. 54 PCB16 Printer Control

Receives print data from a PC. 55

(Option)

Lamps

L1 Exposure Lamps Apply high intensity light to the original

for exposure.

L2 Fusing Lamp 1 Provides heat to the hot roller. 86 L3 Fusing Lamp 2 Provides heat to the hot roller. 85 L4 Quenching Neutralizes any charge remaining on

the drum surface after cleaning.

Index

No.

Overall

Information

58 31 34

101

Power Packs

PP1 Charge Provides high voltage for the charge

corona wires and the grid plate.

PP2 Development

Provides high voltage for the

development unit.

PP3 Transfer Provides high voltage for the transfer

belt.

Others

TF1 Fusing Thermofuse Opens the fusing lamp circuit if the

fusing unit overheats.

TH1 Fusing Thermistor Detects the temperature of the hot

roller.

Optics AntiCondensation

Turns on when the main switch is off

to prevent moisture from forming on

the optics.

H2 Drum Turns on when the main switch is off

to prevent moisture from forming

around the drum.

H3 Tr ay Heater 1 Turns on when the main switch is off

to keep paper dry in the paper tray.

H4 Tr ay Heater 2 Turns on when the main switch is off

to keep paper dry in the paper tray.

87 56 93

84 83 16

62 60

1-19

ELECTRICAL COMPONENT DESCRIPTION June 30, 1998

Symbol Name Function

CB1 Circuit Breaker Provides back-up high current

protection for the electrical

components.

HDD 1 HDD

LCD 1 LCD Displays the operation menus and LSD 1 Laser Synchronization

Detector

TP1 Touch Panel Monitors the key matrix. (32)

Scanned image data is compressed

and held here temporarily.

messages.

Detects the laser beam at the start of

the main scan.

Index

No.

53 32 26

1-20

June 30, 1998 ELECTRICAL COMPONENT DESCRIPTION

1.7.2 ADF

Symbol Name Function Index No.

Motors

M1 Pick-up Moves the pick-up roller up and down. 2 M2

Feed-in

M3 Transport Drives the transport belt. 7 M4 Feed-out Drives the exit and invert er rollers . 11 M5 Bottom plate Moves the bottom plate up and down. 5

Sensors

APS Start Informs the CPU when the DF is opened and

S2 DF Position Detects whether the DF is lifted or not. 10 S3 Original Set Detects whether an original is on the table. 23

S4 S5 S6

Bottom Plate HP Detects whether the bottom plate is in the Bottom Plate

Position Pick-up Roller

HP Entrance Detects when to restart the pick-up motor to

Registration Detect s the leading edge of the original to

S9 Original Width 1 Detects the original width. 21 S10 Original Width 2 Detects the original width. 20 S11 Original Width 3 Detects the original width. 19

S12

Exit Inverter Detects when to turn the inverter gate and

S13

S14 S15

Feed Cover Exit Cover Detects whether the exit cover is open or

Solenoids

SOL1 Exit Gate Opens and closes the exit gate. 13 SOL2 Inverter Gate Opens and closes the inverter gate. 16

Drives the feed belt, and the separation, pick-up, and transport rollers.

closed (for platen mode) so that the original size sensors in the copier can check the original size.

down position or not. Detects when the original is at the correct

position for feeding. Detects whether the pick-up roller is up or

not. lift up the pick-up roller, detects when to

change the feed motor direction, detects the trailing edge of the original to finish checking the original length, and checks for misfeeds.

check the original length, detects when to stop the original on the exposure glass, and checks for misfeeds.

Detects when to stop the transport belt motor and checks for misfeeds.

exit gate solenoids off and checks for misfeeds.

Detects whether the feed cover is open or not.

not.

17 24

Overall

Information

1-21

ELECTRICAL COMPONENT DESCRIPTION June 30, 1998

Symbol Name Function Index No.

PCBs

PCB1

PCB2

DF Main DF Indicator Indicates whether an original has been

Controls the DF and communicates with the main copier boards.

placed in the feeder; and indicates whether SADF mode has been selected.

1-22

June 30, 1998 DOCUMENT FEEDER

2. DETAILED DESCRIPTIONS

2.1 DOCUMENT FEEDER

2.1.1 PICK-UP ROLLER RELEASE MECHANISM

[F]

[D]

[C]

[B]

[E]

Detailed

Descriptions

[A]

A229D651.WMF

When the original set sensor is off (no original on the original tray), the pick-up roller stays in the up position.

When the original set sensor turns on (or when the trailing edge of a page passes the entrance sensor while pages remain on the original tray), the pick-up motor [A] turns on. The cam [B] rotates away from the pick-up roller release lever [C]. The lever then rises and the pick-up roller [D] drops onto the original.

When the original reaches the entrance sensor, the pick-up motor turns on again. The cam pushes the lever down, and the pick-up roller rises until the pick-up roller HP sensor [E] detects the actuator [F].

2-1

DOCUMENT FEEDER June 30, 1998

2.1.2 BOTTOM PLATE LIFT MECHANISM

[F]

[B]

[A]

[F]

[E]

[C]

[D]

A229D652.WMF

When an original is placed on the original tr ay, the origin al set sensor [A] turns on , the pick-up roller [B] drops on to the original, and the bottom plate position sensor [C] turns off. Then the bottom plate motor [D] turns on and lifts the bottom plate [E] by raising the lift lever [F] until the bottom plate position sensor turns on.

When the bottom plate po sition sensor turns off du r ing original feed, the bottom plate motor turns on and lifts the bottom plate until the bottom plate position sensor turns on. This keeps the original at the correct height for feeding.

2-2

June 30, 1998 DOCUMENT FEEDER

2.1.3 PICK-UP AND SEPARATION MECHANISM

[D]

[A]

[B]

[C]

A806D105.WMF

[B]

[A]

Detailed

Descriptions

[C]

A806D106.WMF

The original separation system is an FRR system. The pick-up roller [A], feed belt [B], and separation roller [C] are driven by the feed-in motor [D].

To drive this mechanism, the feed-in motor turns in the forward direction. When two sheets of the original are fed by the pick-up roller, the separation roller

turns in the opposite direction to the feed belt and the 2nd sheet is pushed back to the original tray. When there is only one sheet between the feed belt and separation roller, the separation roller rotates in the same direction as the feed belt. This is because the separation roller contains a torque limiter.

2-3

DOCUMENT FEEDER June 30, 1998

2.1.4 ORIGINAL FEED MECHANISM

[B]

[D]

[A]

[C]

A806D107.WMF

When the leading edge of the original turns the entrance sensor [A] on, the feed - in motor [B] changes direction, and turns in reverse. However, the transport rollers [C] keep turning in the same direction because of a combination of one-way clutches (see the next page).

At the same time, the pick-up motor starts again and the pick-up roller [D] is lifted up. When the pick-up roller HP sensor turns on, the pick-up motor stops (see Pickup Roller Release Mechanism).

2-4

June 30, 1998 DOCUMENT FEEDER

[L]

2.1.5 ORIGINAL FEED DRIVE MECHANISM

[M]

[K]

[E]

[F]

[G]

[J]

Feed Start

[H]

[E]

[C]

[B]

A806D500.WMF

[I]

[D] [A]

[F]

[G]

[H]

[K]

Detailed

Descriptions

[D]

Feed

No Rotation

[M]

[L]

[J]

[I]

[A]

A806D501.WMF

The separation roller [A] and transport rollers [B] always turn in the same direction because of a combination of gears and one-way clutches, even if the feed-in motor [C] changes direction. However, the feed belt [D] stops during original feed. The gears H, L, and M each have a one-way clutch.

Original Feed Start

When the feed-in motor turns on, the drive is tr ansferred as follows:

E→H→K→Feed Belt [D]

→

Separation Roller [A]

→

I→→J

Transport Roller

Original Feed

When the leading edge of the original turns on the entrance sensor, the feed-in motor turns in reverse, and the drive is transferred as follows:

M→Separation Roller

E→F→G

→

Transport Rolle

→

2-5

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