Ricoh 4215 4220 stm Diagram

FT4220/4222/4215

SERVICE TRAINING 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 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. 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 filter installed.

2. Always replace the ozone filter with the specified one at the specified interval.

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 peripheral must be installed and maintained by a customer service representative who has completed the training course on those models.

-- CAUTION --

2. The RAM pack has a lithium battery which can explode if handled incorrectly, replace only with same RAM pack. Do not recharge, or burn this battery. Used RAM pack must be handled in accordance with local regulations.

SAFETY AND ECOLOGICAL NOTES FOR DISPOSAL

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

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

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

MAJOR DIFFERENCES BETWEEN THE FT4220/4222 AND FT4418/4421 SERIES

The FT4220/4222 were developed based on the FT4418/4421. The following table shows the major differences between the FT4220/4222 and the

FT4418/4421 series.

No. Section/Item FT4220/4222

(A110 and A111)

Major Features

1 Copy Speed FT4220:

20 copies/minute (A4/11" x 81/2" sideways) 10 copies/minute (A3/11" x 17")

FT4222 22 copies/minute (A4/11" x 81/2" sideways) 11 copies/minute (A3/11" x 17")

2 Energy Saver

Function

3 User Program

Mode

4 Edge Erase,

Center Erase, Edge/Center Erase

The energy saver function reduces power consumption by decreasing the fusing temperature when the copier is not in use. The energy saving ratio can be changed by SP mode. The automatic energy saver mode is selected by SP mode.

FT4220 Yes FT4222 Yes

The edge erase, center erase and edge/center erase modes are added as preset user program modes. The erase margin can be changed by SP mode.

FT4418/4421

(A048 and A054)

FT4418 18 copies/minute (A4/11" x 81/2" sideways) 10 copies/minute (A3/11" x 17")

FT4421 20 or 21 copies/minute (A4/11" x 81/2" sideways) 11 copies/minute (A3/11" x 17")

----

FT4418 No FT4421 Yes

----

Copier Installation

1 Shipping

Retainers

2 Toner Supply

Unit Initial Setting (SP63)

The following shipping retainers are removed to reduce the installation time:

• Optics Lock Pins

• Scanner Lock Plate and Plugs

• Drum Protective Sheet The toner supply unit initial

setting (SP63) is not required. For the color development unit installation, SP63 must be performed as for the FT4418 series.

----

SP63 must be performed to prevent toner end from being falsely detected because the toner supply unit is empty.

No. Section/Item FT4220/4222

(A110 and A111)

Peripheral

1 Duplex Unit The duplex unit is unique to the

Pigeon series. The differences from the FT4418 series duplex unit are as follows:

1) A projection is added to actuate all the paper size switches.

2) Duplex front cover

3) Duplex main board (Communication signal between the duplex and copier main boards is different from the FT4418 series.)

4) A ground wire is added to the duplex frame in order to absorb electrical noise.

The duplex unit for the FT4418 series cannot be installed on the Pigeon series.

2 Optional DC

Power Supply Unit

FT4220 only

The optional dc power supply unit (Model Code: A525) is unique to the FT4220. The optional dc power supply unit consists of the following parts:

• DC power supply board

• Transformer

• DF interface harness

FT4418/4421

(A048 and A054)

The duplex unit for the Pigeon series cannot be installed on the FT4418 series.

FT4418 only

The optional dc power unit (Model Code: A494) consists of the following parts:

• DC power supply board

• Transformer

• Interface board

• DF/Sorter/Duplex interface harness

The optional dc power supply unit is required when the DF and/or duplex unit is installed on the FT4220.

Peripheral Installation

The optional dc power supply unit is required when the DF, duplex, and/or sorter is installed on the FT4418.

No. Section/Item FT4220/4222

(A110 and A111)

1 Sorter

Installation

The optional dc power supply unit (A525) is not required. The interface harness is an accessory of the sorter.

2 DF Installation FT4220:

The optional dc power supply unit (A525) is required. The DF interface harness is an accessory of the optional dc power supply unit.

FT4222: The optional dc power supply unit is not required. The DF interface harness is not required either.

3 Duplex

Installation

FT4220: The optional dc power supply unit (A525) is required. The duplex harness is an accessory of the duplex unit.

FT4222: The optional dc power supply unit is not required. The duplex interface harness is an accessory of the duplex unit.

FT4418/4421

(A048 and A054)

FT4418: The optional dc power supply unit (A494) is required. The sorter interface harness is an accessory of the optional dc power supply unit.

FT4421: The optional dc power supply unit and the sorter interface harness are installed on the machine at the factory.

FT4418: The optional dc power supply unit (A494) is required. The DF interface harness is an accessory of the optional dc power supply unit.

FT4421: The optional dc power supply unit and the DF interface harness are installed on the machine at the factory.

FT4418: The optional dc power supply unit (A494) is required. The duplex interface harness is an accessory of the optional dc power supply unit.

FT4421: The optional dc power supply unit and the duplex interface harness are installed on the machine at the factory.

Drum

1 Drum The drum is common with that of

the FT5733 and FT4727 series. The expected yield is increased to 80K copies.

Drum Charge

The expected yield is 60K copies.

No. Section/Item FT4220/4222

(A110 and A111)

1 Vp Correction The interval of the grid voltage

increment is changed as the drum changes.

Drum Counter Vp Correction

Factor 0 to 1,999 copies ±0 volt Over 2,000 copies --20 volts

Optics

1 1st Scanner The configuration of the main

and sub reflectors is changed. The proportion of the light reflected from the main and sub reflectors is almost 50% each. Under this condition, both the lead and trail edges of the pasted parts of an original will not make shadows. This mechanism is the same as for the FT4727 series.

2 Dirty

Background Copy

To prevent the dirty backgrounds on copies caused by dust accumulated on optics parts, the following items are modified.

1) The toner shield glass is removed and a green color filter is installed on the lens unit.

2) VL correction is added. The exposure voltage increases at set intervals of the machine on time.

3 Drum Wear

Correction

The interval of the exposure lamp voltage increment is changed because the drum is a new type. Same as FT5733/4727.

Drum rotation Change of time exposure lamp

data 0 to 24h ±0 25 to 49h +1 50 to 74h +2 75 to 99h +3 More than 99h +4

FT4418/4421

(A048 and A054)

Drum Counter Vp Correction

Factor 0 to 999 copies ±0 volt 1,000 to 1,999 copies --20 volts Over 2,000 copies --40 volts

The light intensity reflected from the main reflector is stronger than that reflected from the sub reflector (about 65% to 35%).

----

FT5733 drum cannot be used in

FT4418 due to diffrences in

drum wear correction.

Drum rotation Change of time exposure lamp

data 0 to 9h ±0 10 to 19h +1 20 to 29h +2

: : : :

More than 80h +8

No. Section/Item FT4220/4222

(A110 and A111)

4 Green Filter A green filter has been added

before the lens, to enable red originals to be copied with greater contrast.

5 Scanner Motor

Drive Circuit

Development

1 Bias Voltage in

ADS mode

The scanner motor drive circuit is located on the ac drive board. The main board sends the control signal to the scanner motor drive circuit to regulate the scanner motor speed.

The number of base bias voltage levels corresponding to the ADS output voltage is increased (6 levels). This change will minimize the possibility of dirty background copies with the various originals. This change also helps to prevent dirty background copies caused by dust accumulated on the exposure glass, 1st, 2nd, and 3rd mirrors.

FT4418/4421

(A048 and A054)

----

The main board directly controls the scanner motor.

4 levels

2 Development

Unit Set Sensor

Toner Density Detection And Toner Supply

1 Black Toner

End Detection

2 Black Toner

End Recovery

No Yes

The ID sensor is used for black toner end detection. The black development unit for the Pigeon series cannot be used for the FT4418 series. The toner end detection for the color toner is the same as that of the FT4418 series.

If the front cover is opened and closed, or the main switch is turned off and on in the near end and toner end conditions, no copy can be made. For the color toner, only one copy can be made (same as for the FT4418 series).

The toner end sensor is used for both black and color toner end detection. The ID sensor is used as a back-up system

Only one copy can be made in black and color.

No. Section/Item FT4220/4222

(A110 and A111)

Cleaning

1 Cleaning Blade The plate on the rubber blade is

removed.

2 Toner

Overflow Sensor

Paper Feed

1 Paper Size

Detection in 2nd and 3rd Feed Station

2 2nd and 3rd

Paper Feed Roller

3 Corner

Separators on Paper Tray

4 Tray Lock

Solenoid

Same as FT4418

The paper size switches are actuated by a paper size detection block. To change the paper size, it is necessary to set the paper size detection block of the paper tray to match the paper size.

To achieve 22 CPM from the 3rd paper feed station, the stop angle of the paper feed roller is changed. To prevent the corner of the feed roller from hitting the paper stack when the paper tray is pulled out, the corner of the paper feed roller is cut.

To reduce the occurrence of dog ear and double feed, the shape of the corner separators on the paper tray is changed.

No U7 is displayed when the duplex

unit is opened during the duplex operation.

FT4418/4421

(A048 and A054)

----

When the paper end guide is pushed against the paper stack, the actuator plate slides into position and actuates the appropriate paper size switches.

----

Yes

Others

1 RAM Clear To prevent false RAM clear, the

following items are modified.

1) To minimize electrical noise, the main board is secured by four ground screws.

2) Optional equipment is on the main board.

----

MAJOR UNIQUE PARTS FOR PIGEON SERIES

(Compare with FT4418 Series)

PM Parts

Parts Number Description Remarks

A0699510 Drum Common with the FT5733 series A0063570 Cleaning Blade Common with the FT4460 A1109500 Paper Feed Roller (4 pcs/set) for

2nd and 3rd feed stations.

AA010072 Ozone Filter This ozone filter will be used for

This roller will be used for the FT4418 series.

the FT4418 series.

Electrical Parts

Parts Number Description Remarks

A1105160 Main Board for FT4220 A1115160 Main Board for FT4222

AZ230039 DC Power Supply Board for

FT4222 A1115520 AC Drive Board - 115 V A1115620 AC Drive Board - 220 V

AZ320069 Power Pack - CC/Grid/Bias AX530017 Exposure Lamp - 115 V AX530016 Exposure Lamp - 220 V

A1105235 Erase Lamp

AX440066 Fusing Lamp - 115 V AX440067 Fusing Lamp - 220 V

A1105640 Noise Filter Board (for 220 V only)

AX200095 Registration Clutch

Relay Roller Clutch A1105214 Scanner Motor A1105550 Operation Panel Ass’y

- LT, FT4220(Ricoh)

A1115551 Operation Panel Ass’y

- LT, FT4222 (Ricoh)

A1105650 Operation Panel Ass’y

- A4, FT4220(Ricoh)

A1115651 Operation Panel Ass’y

- A4, FT4222 (Ricoh)

A1106692 Operation Panel Ass’y

- FT4220(SAVIN)

A1116692 Operation Panel Ass’y

- FT4222 (SAVIN)

A1106492 Operation Panel Ass’y

- LT, FT4220(GES)

DC power supply for FT4222 same as FT4418

Electrical Spring Type Magnetic Clutch.

Parts Number Description Remarks

A1116492 Operation Panel Ass’y

- LT, FT4222 (GES)

A1106292 Operation Panel Ass’y

- A4, FT4220(GES)

A1116292 Operation Panel Ass’y

- A4, FT4222 (GES)

A1106094 Operation Panel Ass’y

- FT4220(Infotec)

A1116094 Operation Panel Ass’y

- FT4222 (Infotec)

SECTION 1

OVERALL MACHINE

INFORMATION

1. SPECIFICATIONS

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

Minimum: A6/51/2" x 81/2" (lengthwise )

..... Manual and cassette feeds

A5/11" x 81/2" (sideways)

..... Paper tray feed

(Duplex Copying) A4/11" x 81/2" (sideways) Copy Paper Weight: Cassette feed: 52 to 157 g/m2 (14 to 42 lb)

Paper tray feed: 64 to 90 g/m2 (17 to 22 lb) Manual feed: 52 to 157 g/m2 (14 to 42 lb) Duplex: 58 to 104 g/m2 (16 to 28 lb)

Reproduction Ratio: 2 Enlargement and 3 Reduction

A4/A3 version LT/LDG version

Enlargement 141%

122% Full size 100% 100% Reduction 93%

82% 71%

155% 129%

93% 74% 65%

Zoom: From 50% to 200% in 1% steps Copying Speed: (FT4220 copier)

20 copies/minute (A4/11" x 81/2" sideways) 10 copies/minute (A3/11" x 17") (FT4222 copier) 22 copies/minute (A4/11" x 81/2" sideways)

11 copies/minute (A3/11" x 17") Warm-Up Time: Less than 60 seconds (at 20°C) First Copy Time: 5.9 seconds (A4/11" x 81/2" sideways for cassette

feed) Copy Number Input: Ten keys, 1 to 99 (count up)

STM 1-1 FT4220/4222

Manual Image Density

7 steps Selection:

Automatic Reset: All input modes are reset 1 minute after the copier

is not in use; can also be set to 3 minutes or no

auto reset. Energy Saver Function: Saving the electricity consumption

(Manual or manual/auto) Paper Capacity: Cassettes: 500 sheets

Paper tray: 250 sheets

(FT4220 copier ... 1 paper tray) (FT4222 copier ... 2 paper trays)

Manual feed table: 50 sheets Toner Replenishment: Black: Cartridge exchange (370 g/car tr idge)

YIELD 9500 COPIES

Color (red, blue, & green):

Cartridge exchan ge (310 g/cartridge)

Developer

YIELD 6000 COPIES

Replenishment: Black (1KG/bag.) Yeild 60000 copies.

Color (1KG/bag.) Yeild 30000 copies. Copy Tray Capacity: 250 sheets (B4/81/2" x 14" and smaller)

100 sheets (A3/11" x 17") Power Source: 110 V/ 60 Hz/ 15 A (for Taiwan)

115 V/ 60 Hz/ 15 A (for North America)

220/230/240 V/ 50 Hz/ 8 A (for Europe)

220 V/ 60 Hz/ 8 A (for Middle East)

(Refer to the serial number plate (rating plate) to

determine the power source required by the

machine.) Power Consumptio n:

FT4220 copier FT4222 copier Maximum 1.2 kVA 1.3 kVA Warm-up 720 VA (average) 720 VA (average) Copy cycle 810 VA (average) 830 VA (average) Stand-by

(without energy saver function)

160 VA (average) 160 VA (average)

FT4220/4222 1-2 STM

Dimensions:

Width Depth Height

Copier only FT4220

copier FT4222 copier

Full system FT4220

copier FT4222

copier

( ): when the cassette and platen cover are installed and the copy tray is extended.

672 mm (1130 mm)

26.5" (44.5") 672 mm (1130 mm)

26.5" (44.5") 1149 mm

45.3" 1149 mm

45.3"

600 mm

23.7" 600 mm

23.7"

410 mm (464 mm)

16.1" (18.3") 530 mm (584 mm)

20.9" (23.0") 513 mm

20.2" 633 mm

25.0"

Noise Emissions:

Maximum Copy cycle Stand-by Copier only less than 58 dB less than 55 dB less than 40 dB Full system less than 60 dB less than 58 dB less than 40 dB

Weight:

FT4220 copier FT4222 copier

Copier only 55 kg (121.3 lb) 64 kg (141.1 lb) Full system 78 kg (172 lb) 83.5 kg (184 lb)

Optional Equipment and Machine Configuration:

( ) Machine Code

Configuration Optional dc power supply unit (A525)

Main frame Optional equipment Required Not required

FT4220

copier

(A110)

FT4222

copier

(A111)

CS110 10 bin sorter (A490) O DF57 Document feeder (A318) O AD130 Duplex unit (A491) O Color development unit (A313) O CS110 10 bin sorter (A490) O DF57 Document feeder (A318) O AD130 Duplex unit (A491) O Color development unit (A313) O

Other Optional Equipment:• Key counter

• Universal cassette • Optics anti-condensation heater

• Specifications are subject to change without notice.

STM 1-3 FT4220/4222

2. COPY PROCESSES AROUND THE DRUM

(PTL)

2. EXPOSURE

1. DRUM CHARGE

3. ERASE

9. QUENCHING

4. DEVELOPMENT

8. CLEANING

7. PAPER SEPARATION

5. PRE-TRANSFER LAMP

6. IMAGE TRANSFER

FT4220/4222 1-4 STM

1. DRUM CHARGE

In the dark, the charge corona unit gives a uniform negative charge to the organic photoconductive (OPC) drum. The charge remains on the surface of the drum because the OPC drum has a high electrical resistance in the dark.

2. EXPOSURE

An image of the original is reflected to the OPC drum surface via the optics assembly. Th e charge on the drum surface is dissipated in direct proportion to the intensity of the reflected light, thus producing an electrical latent image on the drum surface.

3. ERASE

The erase lamp illuminates the areas of the charged drum surface that will not be used for the copy image. The resistance of the drum in the illuminated areas drops and the charge on those areas dissipates.

4. DEVELOPMENT

Positively charged toner is attracted to the negatively charged areas of the drum, thus developing the latent image. (The positive triboelectric charge is caused by frict ion between the carrier and toner particles.)

5. PRE-TRANSFER LAMP (PT L)

The PTL illuminates the drum to remove all negative charge from the exposed areas of the drum. This prevents the toner particles from being reattrac ted to the drum surf ace during paper separation and makes paper separation easier.

6. IMAGE TRANSFER

Paper is fed to the drum surface at the proper time so as to align the copy paper and the developed image on the drum surface. Then, a strong negative charge is applied to the back side of the copy paper, producing an electrical force which pulls the toner particles from the drum surface to the copy paper. At the same time, the copy paper is electrically attracted to the drum surface.

7. PAPER SEPARATION

A strong ac corona discharge is applied to the back side of the copy paper, reducing the negative charge on the copy paper and breaking the electrical attraction between the paper and the drum. Then, the stiffness of the copy paper causes it to separate from the drum surface. The pick-off pawls help to separat e paper.

8. CLEANING

The cleaning brush removes most of the toner on the drum and loosens the remainder. Then the cleaning blade scrapes off the loosened toner.

9. QUENCHING

Light from the quenching lamp electrically neutralizes the surface of the drum.

STM 1-5 FT4220/4222

3. COPY PROCESS CONTROL

Image Density Control

Toner Density Detection

Residual Voltage (Vr) Detection

Between Copies (Nonimage area)

Grid Voltage E xposure Lamp

Voltage Standard image density grid voltage (–920V) + Drum residual voltage (Vr) correction factor (SP67) +

Standard ID sensor grid voltage (–560V) + Vp correction factor (SP69)

–500 bolts (Fixed)

0 volt (Fixed) Exposure lamp turns

Base exposure lamp voltage

1. Manual mode [SP48]

2. ADS mode [SP48] and [SP34]

VL correction factor [SP61] and [SP57]

+ Drum wear correction factor (SP58) + Reproduction ratio correction factor

Same as image density control

off

Development Bias

Voltage

Base bias voltage

1. Manual mode

2. ADS mode [SP34]

+ Base bias voltage

adjustment factor

[SP37].....Black

[SP79].....Color

+ Drum residual voltage (Vr) correction fac tor (SP67)

Toner density adjustment factor

[SP33].....Black

[SP75].....Color

+ Vd correction factor (Black only) (SP64) 0 volt (Fixed) Full erase

–200 volts (Fixed) +

Base bias voltage adjustment factor

[SP37].....Black

[SP79].....Color

+ Drum residual voltage (Vr) correction fac tor (SP67)

Erase Lamp

Depending on paper size and reproduction ratio

ID sensor pattern erase (Vsg detection: Full erase)

(All LEDs ON)

Full erase (All LEDs ON)

NOTE: a) Boxed items can be adjusted by SP modes surroun ded by square

brackets [ ].

b) Data which determines the corre ction facto r ca n be observed by

SP modes surrounded by parenthesis ( ).

FT4220/4222 1-6 STM

4. MECHANICAL COMPONENT LAYOUT

1 2 3 4 5 6 7 8 9 10 11 12 13 14

35 34

33 32

15 16

1. Third Mirror

2. Second Mirror

3. First Mirror

4. Exposure Lamp

5. Ozone Filter

6. Cleaning Unit

7. Lens

8. Quenching Lamp (QL)

9. Charge Corona Unit

10. Sixth Mirror

11. Erase Lamp

12. OPC Drum

13. Development Unit

14. Toner Supply Unit

15. Optics Cooling Fans

16. 1st Feed Roller

17. Manual Feed Table

18. Pick-up Roller

222324252627282930

19. Separation Roller

20. 1st Relay Rollers

21. 2nd Relay Rollers (FT4222 copier only)

22. 2nd Feed Rollers (Semi-circular)

23. 3rd Feed Rollers (Semi-circular) (FT4222 copier only)

24. Registration Rollers

25. Pre-transfer Lamp (PTL )

26. Transfer and Separation Corona Unit

27. Pick-off Pawls

28. Cleaning Brush

29. Cleaning Blade

30. Pressure Roller

31. Hot Roller

32. Duplex Turn Guide (Option)

33. Exit Rollers

34. Hot Roller Strippers

35. Exhaust Blower

STM 1-7 FT4220/4222

5. DRIVE LAYOUT

G23

Cleaning

G11

G5 G6

G10

G4 BP3 G12 BP4

G13

G14

G1: Main Motor Gear

TB2

BP5

G17 BP2 G16 TB1 G19 G18 G22

G3BP1G15G33G32G31

G20: Relay Gear

G24

G26

G27

G28

G29G25G21G20G1G2

G2: Relay Gear G18: Relay Gear

Gear

Drum Fusing and Exit Section

BP1: Timing Belt Pulley TB1: Timing Belt

Development Section

BP2: Timing Belt Pulley

G16: Development CL Gear

G17: Toner Supply CL Gear

G21: Cleaning Drive

G22: Relay GearG19: Drum Drive GearG3: Timing Belt Drive

G23: Relay Gear G24: Relay Gear G25: Hot Roller Gear G26: Relay Gear

G27: Relay Gear

G28: Exit Roller Gear

G29: Duplex Transport Gear (Option)

Development UnitDevelopment CL Solenoid

Toner Supply CL Toner Supply Unit

FT4220/4222 1-8 STM

Paper Feed Section

BP3: Timing Belt Pulley

G11: Registration CL Gear

Registration CL Registration Roller

1st Feed Station

1st Paper Feed CL Solenoid 1st Paper Feed Rollers

G4: Relay Gear G12: Relay Roller CL Gear G5: Relay Gear

G6: 1st Paper Feed CL Gear G7: Relay Gear G8: Paper Lift CL Gear Paper Lift CL G9: Paper Lift Gear G10: Sector Gear

2nd Feed Station Upper Relay Roller

G13: Upper Relay Roller Gear

Relay Roller CL

3rd Feed Station

(FT4222 copier only)

G14: Relay Gear

G15: 2nd Paper Feed CL Gear

2nd Paper Feed CL

2nd Paper Feed Roller

STM 1-9 FT4220/4222

BP4: Timing Belt Pulley TB2: Timing Belt BP5: Timing Belt Pulley Lower Relay Roller G31: Lower Relay Roller Gear G32: Relay Gear G33: 3rd Paper Feed CL Gear 3rd Paper Feed CL 3rd Paper Feed Roller

6. ELECTRICAL COMPONENT LAYOUT

567

11 12

1. Scanner H.P. Sensor

2. Lens H.P. Sensor

3. Scanner Motor

4. Main Motor

5. Development Clutch Solenoid

6. Toner Supply Clutch

7. 4th/5th Mirror H.P. Sensor

8. Color Toner End Sensor

9. 4th/5th Mirror Motor

10. Pick-up Roller Release Solenoid

11. Manual Feed Table Switch

12. Color Switch

13. Paper Lift Clutch

14. 1st Paper Feed Clutch Solenoid

15. Registration Clutch

16. Right Cover Switch

17. Relay Roller Clutch

18. 1st Paper Size Switch

19. 1st Paper End Sensor

20. Relay Sensor (FT4222 Copier Only)

21. Paper Lift Sensor

22. Registration Sensor

23. Total Counter

24. Pre-transfer Lamp (PTL)

25. ID Sensor Board

26. Erase Lamp

27. Fusing Lamp

28. Quenching Lamp (QL)

29. Auto image Density Sensor

30. Fusing Thermistor

31. Toner Overflow Sensor

32. Fusing Thermofuse

33. Exit Sensor

34. Lens Motor

FT4220/4222 1-10 STM

35 36

57 56

35. Platen Cover Closed Switch (FT4222 copier only)

36. Operation Panel Board

37. Original Length Sensor (FT4222 copier only)

38. Optics Thermoswitch

39. Exposure Lamp

40. Original Width Sensor (FT4222 copier only)

41. Cover Safety Switch

42. Main Switch

43. Exhaust Blower Motor

44. Drum Anti-condensation Heater

45. Main DC Power Supply Board

46. Option DC Power Supply Board (FT4220 copier only)

47. Option Transformer (FT4220 copier only)

48. 3rd Paper Size Switches (FT4222 copier only)

49. Noise Filter Board (220/230/240 V only)

50. 2nd Paper Size Switches

51. Main Transformer

52. 3rd Paper End Sensor (FT4222 copier only)

53. AC Drive Board

54. 3rd Paper Feed Clutch (FT4222 copier only)

55. 2nd Paper End Sensor

56. 2nd Paper Feed Clutch

57. Main Motor Capacit or

58. Main Board

59. TC/SC Power Pack

60. CC/Grid/Bias Power Pack

61. Platen Cover Position Sensor (FT4222 copier only)

62. Optics Cooling Fan Motors

STM 1-11 FT4220/4222

7. ELECTRICAL COMPONENT DESCRIPTIONS

Symbol Name Function Index No.

Motors

M1 Main Motor Drives all the main unit components except

for the optics unit and fans. (115/220/230/240 Vac)

M2 Scanner Motor Drives the scanners (1st and 2nd). (dc

stepper)

M3 Lens Motor Moves the lens posit ion according to the

selected magnification. (dc stepper)

M4 4th/5t h Mirror Mot or Move the 4th/5th mirror position according to

the selected magnification. (dc stepper)

M5 Optics Cooling Fan

Motor-1

M6 Optics Cooling Fan

Motor-2

M7 Exhaust Blower

Motor

Magnet ic Clu tch

MC1 Toner Supply Clutch Drives the toner supply roller. 6

Prevents built up of hot air in the optics cavity. (24 Vdc)

Removes heat from around the fusing unit and blower the ozone built up around the charge section to the ozone filter. (115/220/230/240 Vac)

Magnetic Sprin g Clutches

MSC1 2nd Paper Feed

Clutch MSC2 Paper Lift Clutch Lifts paper to the appropriate feed station. 13 MSC3 Registration Clutch Drives the registration rollers. 15 MSC4 Relay Roller Clutch Drives the relay rollers for the 2nd or 3rd

MSC5 3rd Paper Feed

Clutch

Solenoids

SOL1 1st Paper Feed

Clutch Solenoid

SOL2 Pick-up Roller

Release Solenoid

SOL3 Development

Clutch Solenoid

Switches

SW1 Main Switch Supplies power to the copier. 42 SW2 Cover Safety Switch Cuts the ac power line when the front cover

Starts paper feed from the 2nd paper feed station.

paper feed station. Starts paper feed from the 3rd paper feed

station. (FT4222 copier only)

Starts paper feed from the first paper station. 14

a) After the paper is fed, releases the pick-up roller from next paper. b) When the manual feed table is used, releases the pick-up roller from the table.

Drives the development unit. 5

or/and exit cover is open.

FT4220/4222 1-12 STM

Symbol Name Function Index No.

SW3 1st Paper Size

Switch

SW4 2nd Paper Size

Switch-1 (Upper)

SW5 2nd Paper Size

Switch-2 (Lower)

SW6 Color Switch Determines which color development unit is

Determines what size paper is in the cassette.

Determines what size paper is in the upper paper tray.

installed.

SW7 Manual Feed Table

Detects when the manual feed table is open. 11

Switch

SW8 Right Cover Switch Detects when the right cover is open. 16 SW9 3rd Paper Size

Switch-1 (Upper) SW10 3rd Paper Size

Switch-2 (Lower) SW11 Platen Cover

Closed Switch

Determines what size paper is in the lower tray. (FT4222 copier on ly)

Detects when the platen cover or the document feeder is closed.

(FT4222 copier only)

Sensors

S1 Scanner Home

Position Sensor

S2 Lens Home

Position Sensor

S3 4th/5th Mirror Home

Position Sensor

Informs the CPU when the 1st scanner is at the home position.

Informs the CPU when the lens is at the home position (full size position).

Informs the CPU when the 4th/5th mirrors assembly is at the home position (full size

position). S4 Registration Sensor Detects misfeeds. 22 S5 Exit Sensor Detects misfeeds. 33 S6 1st Paper End

Sensor

S7 2nd Paper End

Sensor

S8 Color Toner End

Sensor

S9 Paper Lift Sensor Detects the correct feed height of the

Informs CPU when the cassette runs out of

paper.

Informs CPU when the upper paper tray

runs out of paper.

Detects when it is time to add toner for the

color development unit.

cassette.

S10 Image Density (ID)

Sensor

S11 Auto Image Density

Sensor (ADS)

S12 3rd Paper End

Sensor

Detects the density of the image on the

drum to control the toner density.

Senses the background density of the

original.

Informs CPU when the lower paper tray runs

out of paper. (FT4222 copier only)

S13 Relay Sensor Detects misfeeds. (FT4222 copier o nly) 20 S14 Platen Cover

Position Sensor

Detects when the platen cover is positioned

about 10 cm (4") above the exposure glass.

(FT4222 copier only)

STM 1-13 FT4220/4222

Symbol Name Function Index No.

S15 Original Width

Sensor

S16 Original Length

Sensor

S17 Toner Overflow

Detects the original width. (FT 4222 copier

only)

Detects the original length.

(FT4222 copier only)

Detects when the used toner tank is full. 31

Sensor

Printed Circuit Boards

PCB1 Main Board Controls all copier functions both direct ly

and through the other PCBs.

PCB2 AC Drive Board Drives all ac motors, the exposure lamp,

53 fusing lamp, quenching lamp, exhaust blower motor.

PCB3 Main DC Power

Supply Board

PCB4 Operation Panel

Board

PCB5 Noise Filter Board Removes the electrical noise.

Rectifies 26 (31) Vac and 10 Vac input and outputs dc voltages.

Informs the CPU of the selected modes and displays the situations on the panel.

49 (220/230/240 V only)

PCB6 Option DC Power

Supply Board

Rectifies 26 and 10 Vac input and outputs dc voltages. This board is required when the

46 document feeder or/and duplex unit is

installed. (FT4220 copier on ly)

Lamps

L1 Exposure Lamp Applies high intensity light to the original for

exposure.

L2 Fusing Lamp Provides heat to the hot roller. 27 L3 Quenching Lamp Neutralizes any charge remaining on the

drum surface after cleaning.

L4 Erase Lamp Discharge the drum outside of the imag e

area. Provides leading/tr ailing edge, side and editing erases.

L5 Pre-transfer Lamp Reduces charge on the drum surface before

transfer.

Power Packs

P1 CC/Grid/Bias

Power Pack

Provides high voltage for the charge corona, grid, and the development roller bias.

P2 TC/SC Power Pack Provides high voltage for the transfer and

separation corona.

Heaters

H1 Drum

Prevents moisture around the drum. 44

Anti-condensation Heater

FT4220/4222 1-14 STM

Symbol Name Function Index No.

H2 Optics

Anti-condensation Heater (Option)

Counters

CO1 Total Counter Keeps track of the total number of copies

CO2 Key Counter

(Option)

Transformer

TR1 Main Transforme r Steps down the wall voltage to 26 (31) Vac

TR2 Option Transformer Steps down the wall voltage to 26 Vac and

Others

TH Fusing Thermistor Monitors the fusing temperature. 30

TF Fusing Thermofuse Provides back-up overheat protection in th e

TS Optics

Thermoswitch

C Main Motor

Capacitor

Prevents moisture from forming on the optics.

made. Used for control of authorized use. Copier

will not operate until installed.

and 10 Vac.

10 Vac. This transformer is required when the document feeder or/and duplex unit is installed. (FT4220 copier on ly)

fusing unit. Provides back-up overheat protection

around the exposure lamp. Start capacitor 57

N/A

STM 1-15 FT4220/4222

8. AC POWER AND DC POWER DISTRIBUTION

FT4220/4222 1-16 STM

When this copier is plugged in and the main switch is turned off, ac power is supplied via the ac drive board to the anti-condensation heater. When the front cover and/or the exit cover is open, the cover safet y switch comp letely cuts off power to all ac and dc components. The RAM board has a back up power supply (dc battery) for the service program mode and misfeed job recovery.

(FT4220) When the main switch is turned on, the ac power supply to the anti-condensation heater is cut off and ac power is supplied to the ac drive board. The main and optional tra nsformers receive wall outlet ac power through the ac drive boar d. It outpu ts 10 volts ac and 26 volts ac to the main and optional dc power supply boards.

The main dc power supply board conver ts the 10 volts ac to +5 volts and a zero cross signal. There are two 26 volts ac inputs. The main dc power supply board converts them to +24 volts and +30 volts.

The +5 volt and +24 volt currents are supplied to the copier main board and ac drive board. The +30 volt current is supplied to the ac drive board. The zero cross signal is supplied to the copier main board thr ough the ac drive board.

The copier main board supplies dc power to all copier dc components except the scanner motor and lens motor. All sensors and switches operate on +5 volts. All other dc compone nts including the power relay (RA401) and the main motor relay (RA402) operate on +24 volts. The copier main board also supplies the +5 volt and +24 volt currents to the sorter.

The ac drive board supplies +30 volts to the scanner motor and +24 volts to the lens motor. The +5 volt current is dc power for the ICs on the scanner motor drive circuit. The main board sends the control signals to the scanner motor and lens motor through the ac drive board.

The optional dc power supply board supplies +5 volts and +24 volts to the duplex unit and ARDF.

STM 1-17 FT4220/4222

(FT4222)

When the main switch is turned on, the ac power supply to the anti-condensation heater is cut off and ac power is supplied to the ac drive board. The main transfo rm er rece ives wall outlet ac power throu gh the ac drive board and outputs 10 volts ac and 31 volts ac to the main dc power supply board.

The main dc power supply board conver ts the 10 volts ac input to +5 volts and a zero cross signal. The dc power supply board converts the 31 volts ac to +24 volts.

The +5 volt and +24 volt currents are supplied to the copier main board, ac drive board. The zero cross signal is supplied to the copier main board through the ac drive board.

The copier main board supplies dc powers to all copier dc components except the scanner motor and lens motor. All sensors and switches operate on +5 volts. All other dc compone nts including the power relay (RA401) and the main motor relay (RA402) operate on +24 volts. The copier main board also supplies the +5 volt and +24 volt currents to the sorter, ARDF and duplex unit.

The ac drive board supplies +24 volts to the scanner motor and lens motor. The +5 volt current is dc power for the ICs on the scanner motor drive circuit. The main board sends the control signals to the scanner motor and lens motor through the ac drive board.

When the main board receives power, it activates the power relay (RA401 ) which then supplies ac power to the fusing lamp drive circuit, and the exposure lamp drive circuit on the ac drive board. The exhaust blower motor begins rotating at low speed. The fusing lamp drive circuit receives a trigger signal from the main board and the fusing lamp lights. T he exposur e lamp does not turn on until the main board send a trigger pulse to the exposure lamp drive circuit.

When the Start key is pressed, the main board ener gizes the main motor relay (RA402). Then, the main motor and the quenching lamp turn on and the exhaust blower starts rotating at high speed.

When the main switch is turned off, power is cut off to the main board and to RA401, and the drum and option al anticond ensat ion heaters are turned on. The exposure lamp and the fusing lamp power lines are completely disconnected from the line voltage .

FT4220/4222 1-18 STM

+ 178 hidden pages

Ricoh 4215 4220 stm Diagram

Specifications and Main Features

Frequently Asked Questions

User Manual

IMPORTANT SAFETY NOTICES