Ricoh FT3313, FT3113, FT3013, FT3213 Service Manual

4 (1)

A151/A152

SERVICE TRAINING

MANUAL

6.MAJOR DIFFERENCE BETWEEN THE FT3013/FT3213 AND FT3113/FT3313 COPIERS

The FT3013/FT3213 (A151 and A152) are developed based on the FT3113/FT3313 (A076 and A077).

The following table lists the major differences between the FT3013/FT3213 series and the FT3113/FT3313 series.

No.

 

ITEM

FT3013/FT3213

FT3113/FT3313

Overall

 

 

 

1

 

Energy Saver Function

Newly added.

Not available.

 

 

 

 

 

2

 

Copy Paper Weight

The copy paper weight specification has been

 

 

 

 

narrowed due to the changes in the paper feed

 

 

 

 

mechanism.

 

3

 

Operation Panel

10 independent number keys for faster and

Quantity keys.

 

 

 

easier operation. The access to the SP modes

 

 

 

 

have been changed due to this reason.

 

Around the Drum

 

 

4

 

Pre-Transfer Lamp

The pre-transfer lamp has been removed. the

The PTL is installed.

 

 

 

same PTL for the FT3113/3313 series is

 

 

 

 

available for the FT3013/3213 series as

 

 

 

 

optional service equipment.

 

 

 

 

Due to this, the transfer corona adjustment

 

 

 

 

standard has been changed.

 

5

 

Cleaning Mechanism

Counter blade system.

Trailing system with brush.

 

 

 

Setting powder should be applied on the blade

 

 

 

 

and drum after servicing.

 

6

 

Drum Drive Mechanism

The main motor directly drives the drum. The

An independent drum motor

 

 

 

drum motor and the drum motor board have

drives the drum.

 

 

 

been removed.

 

7

 

Erase Mechanism

For the FT3013 copier, side erase is

 

 

 

 

performed by the platen cover. (The FT3213

 

 

 

 

copier is the same as the FT3313)

 

8

 

Development Drive Mechanism

The development clutch solenoid has been

 

 

 

 

removed.

 

Paper Feed

 

 

9

 

Paper Feed Mechanism

Semicircular feed rollers and corner separator

FTR (Feed + Torque Roller)

 

 

(Paper Tray)

system.

feed system with corner

 

 

 

 

separators.

10

 

Paper Feed Mechanism

Auto feed mechanism is newly applied.

No auto feed.

 

 

(By-Pass feed table)

 

 

11

 

Misfeed Indication

PE, J1 and J2.

J1, J2, and J3.

 

 

 

Indication change only.

 

 

 

 

The basic detection mechanism has not

 

 

 

 

changed.

 

Fusing

 

 

 

12

 

Fusing Lamp Control

Fusing lamp control mechanism has changed

 

 

 

 

to achieve stable temperature control of the

 

 

 

 

hot roller.

 

1

No.

ITEM

FT3013/FT3213

FT3113/FT3313

 

 

 

 

Copy Process Control

 

 

13

Grid Voltage for Image Density

The grid voltage does not change whether the

The grid voltage is different

 

Control

manual image density is selected or auto

depending on whether the

 

 

image density is selected (with the exception

image density is manually

 

 

of SP34 setting).

selected or the auto image

 

 

 

density mode is used.

14

Exposure Lamp Voltage for

The Vl correction method has changed to

The Vl correction is applied at

 

Image Density Control

prevent over applying of the exposure lamp

set intervals.

 

 

voltage. A white reference plate has been

 

 

 

added under the left scale supporting bracket.

 

15

Drum Temperature Correction

The drum temperature correcton has been

 

 

 

eliminated.

 

Optics

 

 

 

16

Optics Thermistor and Cooling

An optics thermistor has been added to

The optics thermistor is not

 

Fan

monitor the optics temperature for the

equipped. The optics cooling

 

 

operation of the optics cooling fan motor for

fan operates during the copy

 

 

the FT3213 copiers. Since the cooling fan is

cycle.

 

 

not installed on the FT3013 copier, the optics

 

 

 

thermistor monitors the optics temperature to

 

 

 

prevent overheating in the optics cavity.

 

 

 

However the copier may stop for some extra

 

 

 

waiting time when the thermistor detects a

 

 

 

certain high temperature condition.

 

Drum Cleaning

 

 

17

Used toner Overflow Detection

Since the elimination of the PTL and the

 

 

 

change of the QL, the used toner overflow

 

 

 

detection cycle has been changed.

 

 

 

1. When the copy quantity

 

 

 

reaches 80K copies.

 

 

 

2. When the number of toner

1. Same as the FT3013/3213.

 

 

end conditon reaches 9.

2. When the number of toner

 

 

 

 

 

 

end condition reaches 11.

Installation

 

 

18

Developer

Developer is not equipped to the copier at the

 

 

 

factory. A new pack is necessary when

 

 

 

installing the copier.

 

19

220-230V to 240V Conversion

The conversion for the exposure lamp is

The coversion for the

 

 

required. The conversion for the dc power

exposure lamp and dc power

 

 

supply board is not required.

supply board is required.

20

Key Counter

In order to install the optional key counter,

 

 

 

some service parts need to be ordered.

 

Document Feeder (A365)

 

 

21

Installation

From the May production, to install the DF to

The ADF interface unit and the

 

 

the FT3213, the ADF interface unit and the two

two stud screws are installed

 

 

stud screws are an accessory of the DF.

on the FT3313.

Service Program Mode

 

 

22

Sales Mode

The salesman mode has been eliminated.

Some SP modes can be

 

 

 

accessed by the sales

 

 

 

representatives.

Service Call

 

 

23

E40

"Optics Thermistor Error"

 

 

 

has been eliminated.

 

2

No.

ITEM

FT3013/FT3213

FT3113/FT3313

 

 

 

 

Test Points

 

 

24

Test Points

Some test points on the main control board

 

 

 

have been eliminated.

 

Replacement and Adjustment

 

 

25

Transfer Corona Current

The adjustment standard is

The adjustment standard is

 

Adjustment

DC -34.0 ± 0.5 μA

DC -20.0 ± 0.5 μA

26

Fusing Unit Removal

the fusing unit removal procedure has been

 

 

 

modified to achieve faster servicing.

 

3

7. MAJOR UNIQUE PARTS FOR THE FT3013/FT3213 (Compared with the FT3113/FT3313)

PM Parts

Parts Number

Description

Remarks

AD002044

Cleaning Blade

 

 

 

 

 

Cleaning Brush

eliminated

 

 

 

 

Paper Feed Roller

eliminated

 

 

 

 

Torque Roller

eliminated

 

 

 

Electrical Parts

 

 

 

 

 

Parts Number

Description

Remarks

A1515100

Main Board for FT3013

 

A1525100

Main Board for FT3212

 

 

 

 

AZ220019

DC Power Supply Board - 115V

 

 

 

 

A1525660

AC Drive Board - 115V

 

 

 

 

AZ320075

Power Pack - CC/G/B

 

 

 

 

AZ320076

Power Pack - T/D

 

 

 

 

A1515276

Erase Lamp for FT3013

 

 

 

 

AX640056

Optics Cooling Fan Motor for FT3213

 

 

 

 

AX640057

Exhaust Blower Motor

 

 

 

 

A1525610

Quenching Lamp - 115V

 

 

 

 

AW100028

Fusing Thermistor

 

 

 

 

A1525120

Optics Control Board (Auto ID Sensor)

 

A1525241

ID Sensor Board

 

 

 

 

AW100033

Optics Thermistor

 

 

 

 

A1535211

4th/5th Mirror Drive Motor

 

A1535213

Lens Drive Motor

 

 

 

 

AW020075

Photointerrupter

 

 

 

 

AX020078

Main Motor - 115V

 

AX520023

Exposure Lamp - 97V/220W

 

 

 

 

AG010049

Operation Panel Assembly for FT3013

 

 

 

 

AG010051

Operation Panel Assembly for FT3213

 

 

 

 

Consumables

The toner used by the FT3013/3213 is different from the FT3113/FT3313.

4

SECTION 1

OVERALL MACHINE

INFORMATION

1. SPECIFICATIONS

Configuration:

Desk top

 

Copy Process:

Dry electrostatic transfer system

Original Type:

Sheet/Book

 

Original Alignment:

Left center

 

Original Size:

Maximum:

A3/11" x 17" (lengthwise) -- FT3213

 

 

copier

 

 

B4/10" x 14" (lengthwise) -- FT3013

 

 

copier

Copy Paper Size:

Maximum:

B4/10" x 14" (lengthwise)

 

 

Minimum:

 

 

 

 

 

Paper Tray: A5/51/2" x 81/2" (lengthwise)

 

 

Bypass Feed: A6/51/2" x 81/2" (lengthwise)

Copy Paper Weight:

Paper tray feed -- 64 to 90 g/m2 (17 to 24 lb)

 

 

Bypass feed -- 52 to 105 g/m2 (14 to 28 lb)

Reproduction Ratios:

2 Enlargement and 3 Reduction (FT3213 copier

 

 

only)

 

 

 

 

 

 

 

 

 

 

 

 

A4 Version

 

Letter Version

 

 

Enlargement

141%

 

129%

 

 

122%

 

121%

 

 

 

 

 

 

Full size

100%

 

100%

 

 

 

93%

 

93%

 

 

Reduction

82%

 

74%

Zoom:

 

 

71%

 

65%

 

From 61% to

141% in 1% steps

 

 

 

 

(FT3213 copier only)

 

Copying Speed:

13 copies/minute (A4/81/2" x 11" lengthwise)

 

 

10 copies/minute (B4/81/2" x 14")

 

Warm-Up Time:

30 seconds (at 20°C/68°F)

 

First Copy Time:

9 seconds (A4/81/2" x 11" lengthwise)

Copy Number Input:

Number keys, 1 to 99

 

Manual Image Density:

7 steps

 

 

 

Toner Type:

Type 320

 

 

 

Developer Type:

Type 310

 

 

 

FT3013/3213

1-1

STM

 

Automatic Reset:

 

1 minute standard setting; can also be set to 3

 

minutes or no automatic reset.

Energy Saver Function:

Automatic

Paper Capacity:

Paper tray -- 250 sheets

 

Bypass feed table -- 1 sheet

Toner Replenishment:

Cartridge exchange (320 g/cartridge)

Copy Tray Capacity:

100 sheets (B4/10" x 14" or smaller)

Power Source:

110V/ 60Hz/ 15A (for Taiwan)

 

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

 

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

 

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

 

220V/ 50Hz/ 8A (for Asia)

 

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

determine the power source required by the machine.)

Power Consumption:

 

 

 

 

 

Copier Only

 

With DF*

 

 

Maximum

 

 

1.4 kVA

 

1.5 kVA

 

 

Warm-up

 

620 VA (average)

 

640 VA (average)

 

 

Copy cycle

 

810 VA (average)

 

860 VA (average)

 

 

Ready

 

160 VA (average)

 

180 VA (average)

Noise Emission:

 

 

 

 

 

 

 

 

 

 

 

Copier Only

 

With DF*

 

Maximum

 

 

58 db

 

60 db

 

Copy cycle

 

 

Less than 55 db

 

Less than 55 db

 

Ready

 

 

Less than 39 db

 

Less than 39 db

 

 

 

 

 

 

 

 

Dimensions:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Width

 

Depth

 

Height

Copier with platen cover and

713 mm (28.1")

 

592 mm (23.3")

 

400 mm (15.7")

copy tray

 

 

 

 

 

 

 

 

Copier with document feeder

713 mm (28.1")

 

592 mm (23.3")

 

463 mm (18.2")

and copy tray

 

 

 

 

 

 

 

 

*NOTE: The document feeder can be installed only on the FT3213 copier.

STM

1-2

FT3013/3213

Weight:

Copier only:

43 kg (94.8 lb)

 

With DF:

50 kg (110.2 lb)

Optional Equipment:

Document feeder (FT3213 copier only)

(Sales items)

Key counter

 

Optional Equipment:

Drum anti-condensation heater

(Service items)

Optics anti-condensation heater

 

Pre-transfer lamp

 

 

Optics cooling fan (for FT3013 copier only)

 

Specifications are subject to change without notice.

Model Designations:

A151 = FT3013

 

 

A152 = FT3213

 

FT3013/3213

1-3

STM

2. MECHANICAL COMPONENT LAYOUT

16

17

18

19

20

21

22 23 24

25

26

 

 

 

 

 

 

 

 

27

15

28

14

13

 

 

 

 

 

 

 

29

 

12

 

 

 

 

 

30

11

 

 

 

 

 

 

31

10

 

 

 

 

 

 

32

 

 

 

 

 

 

 

33

9

 

 

 

 

 

 

 

8

7

6

5

4

3

2

1

1.

Semicircular Feed Rollers

12.

Hot Roller Strippers

2.

Paper Tray

13.

Exhaust Blower Motor

3.

Registration Rollers

14.

3rd Mirror

4.

Transfer and Separation

15.

2nd Mirror

 

Corona Unit

16.

1st Mirror

5.

Pick-off Pawl

17.

Ozone Filter

6.

Cleaning Unit

18.

Used Toner Tank

7.

Pressure Roller

19.

Cleaning Blade

8.

Fusing Unit

20. Quenching Lamp

9.

Hot Roller

21.

Charge Corona Unit

10.

Exit Rollers

22.

Lens

11.

Copy Tray

23.

6th Mirror

 

 

24.Erase Lamp

25.Drum

26.4th Mirror

27.5th Mirror

28.Optics Cooling Fan Motor (FT3213 Copier only)

29.Toner Supply Unit

30.Development Unit

31.2nd Relay Rollers

32.By-pass Feed Table

33.1st Relay Rollers

STM

1-4

FT3013/3213

3. ELECTRICAL COMPONENT LAYOUT

 

23

24

 

22

25

 

 

 

21

 

26

 

20

 

27

28

19

 

 

18

 

 

29

30

31

17

16

15

32

14

13

 

 

 

 

 

 

33

 

 

 

 

 

 

 

34

12

 

 

 

 

 

 

 

11

 

 

 

 

 

 

 

10

 

 

 

 

 

 

35

9

8

 

 

 

 

 

 

 

7

 

 

 

 

36

 

 

6

5

4 3

38

37

 

 

 

 

 

1

 

 

 

 

 

 

 

2

 

1.Paper Tray Switch

2.Relay Sensor

3.Registration Clutch

4.Optics Cooling Fan Motor (FT3213 only)

5.Registration Sensor

6.Image Density Sensor

7.Power Pack-TC/SC

8.Operation Panel Board

9.Erase Lamp

10.Total Counter

11.Quenching Lamp

12.Fusing Lamp

13.Front Cover Safety Switch

14.Main Switch

15.Fusing Thermoswitch

16.Exit Sensor

17.Exhaust Blower Motor

18.

Optics Thermofuse

31.

4th/5th Mirror Motor

19.

Auto Image Density Sensor

(FT3213 copier only)

 

20.

Fusing Thermistor

32.

Main Motor Capacitor

33.

Main Board

21. Exposure Lamp

34.

Main Motor

22.

Lens Motor

 

 

 

(FT3213 copier only)

35.

Toner Supply Clutch

23. Scanner Home Position

36.

DC Power Supply Board

 

Sensor

37.

Relay Roller Clutch

24.

Optics Thermistor

38.

Paper Feed Clutch

 

 

25.Lens Home Position Sensor

(FT3213 copier only)

26.Power Pack-CC/Grid/Bias

27.AC Drive Board

28.Fusing Triac (115 V only)

29.Scanner Motor

30.4th/5th Mirror Home Position Sensor (FT3213 copier only)

FT3013/3213

1-5

STM

Rev. 1/95

4. ELECTRICAL COMPONENT DESCRIPTIONS

Motors

SYMBOL

NAME

FUNCTION

INDEX

NO.

 

 

 

 

 

Drives all the main unit components except for the

 

M1

Main Motor

optics unit and fans. (115/220--240 Vac [ac

34

 

 

synchronous])

 

M2

Scanner Motor

Drives the scanners (1st and 2nd). (dc stepper)

29

 

 

Positions the lens according to the selected

 

M3

Lens Motor

magnification. (dc stepper)

22

 

 

¼ FT3213 copier only

 

 

4th/5th Mirror

Positions the 4th/5th mirrors according to the

 

M4

selected magnification. (dc stepper)

31

Motor

 

¼ FT3213 copier only

 

 

 

 

 

Optics Cooling

Prevents a build up of hot air in the optics cavity.

 

M5

(24 Vdc)

4

Fan Motor

 

¼ FT3213 copier only

 

 

 

 

 

Exhaust Blower

Removes heat from around the fusing unit and

 

M6

moves the ozone built up around the charge

17

Motor

 

section to the ozone filter. (24 Vdc)

 

 

 

 

Magnetic Clutch

SYMBOL

NAME

FUNCTION

INDEX

NO.

 

 

 

MC1

Registration

Drives the registration rollers.

3

Clutch

 

 

 

Magnetic Spring Clutches

SYMBOL

NAME

FUNCTION

INDEX

NO.

 

 

 

MSC1

Toner Supply

Drives the toner supply roller.

35

Clutch

 

 

 

MSC2

Relay Roller

Drives the 1st and 2nd relay rollers.

37

Clutch

 

 

 

MSC3

Paper Feed

Starts paper feed.

38

Clutch

 

 

 

STM

1-6

FT3013/3213

Switches

SYMBOL

NAME

FUNCTION

INDEX

NO.

 

 

 

SW1

Main Switch

Supplies power to the copier.

14

SW2

Front Cover

Cuts the ac power line, when the front cover is

13

Safety Switch

open.

 

 

SW3

Paper Tray

Detects when the paper tray is set.

1

Switch

 

 

 

Sensors

SYMBOL

NAME

FUNCTION

INDEX

NO.

 

 

 

S1

Scanner Home

Informs the CPU when the 1st scanner is at the

23

Position Sensor

home position.

 

 

 

Lens Home

Informs the CPU when the lens is at the home

 

S2

position (full size position).

25

Position Sensor

 

¼ FT3213 copier only

 

 

4th/5th Mirror

Informs the CPU when 4th/5th mirrors assembly is

 

S3

Home Position

at the home position (full size position).

30

 

Sensor

¼ FT3213 copier only

 

S4

Registration

1) Detects misfeeds.

5

Sensor

2) Controls the relay roller clutch stop timing.

 

 

S5

Exit Sensor

Detects misfeeds.

16

 

 

1) Detects when copy paper is set on the

 

S6

Relay Sensor

by-pass feed table.

2

 

 

2) Detects misfeeds.

 

S7

Image Density

Detects the density of the image on the drum to

6

(ID) Sensor

control the toner density.

 

 

 

Auto Image

 

 

S8

Density Sensor

Senses the background density of the original.

19

 

(ADS)

 

 

Printed Circuit Boards

SYMBOL

NAME

FUNCTION

INDEX

NO.

 

 

 

PCB1

Main Board

Controls all copier functions both directly and

33

through the other PCBs.

 

 

 

PCB2

AC Drive Board

Drives the main motor, exposure lamp, fusing

27

lamp, and quenching lamp.

 

 

 

PCB3

DC Power

Converts the wall outlet ac power input to +5 volts,

36

Supply Board

+24 volts, and a zero cross signal.

 

 

 

Operation Panel

Informs the CPU of the selected modes and

 

PCB4

displays the copier status and condition on the

8

 

Board

panel.

 

 

 

 

FT3013/3213

1-7

STM

Lamps

SYMBOL

NAME

FUNCTION

INDEX

NO.

 

 

 

L1

Exposure Lamp

Applies high intensity light to the original for

21

exposure.

 

 

 

L2

Fusing Lamp

Provides heat to the hot roller.

12

L3

Quenching Lamp

Neutralizes any charge remaining on the drum

11

surface after cleaning.

 

 

Discharge the drum outside of the image area.

 

L4

Erase Lamp

Provides leading/trailing edge erase and side

9

 

 

erase.

 

Power Packs

SYMBOL

NAME

FUNCTION

INDEX

NO.

 

 

 

P1

Power Pack

Provides high voltage for the charge corona, grid,

26

--CC/Grid/Bias

and development roller.

 

 

P2

Power Pack

Provides high voltage for the transfer and

7

--TC/SC

separation corona.

 

 

Counter

SYMBOL

NAME

FUNCTION

INDEX

NO.

 

 

 

CO1

Total Counter

Keeps track of the total number of copies made.

10

Others

SYMBOL

NAME

FUNCTION

INDEX

NO.

 

 

 

TH1

Fusing

Monitors the fusing temperature.

20

Thermistor

 

 

 

TH2

Optics

Monitors the optics temperature.

24

Thermistor

 

 

 

TS

Fusing

Provides back-up overheat protection in the fusing

15

Thermoswitch

unit.

 

 

TF

Optics

Provides back-up overheat protection around the

18

Thermofuse

exposure lamp.

 

 

C

Main Motor

Start capacitor.

32

Capacitor

 

 

 

 

 

Switches the fusing lamp on and off. (115 V only)

 

TR

Fusing Triac

Note: In the 220V-230V/240V version, the triac

28

 

 

is built-in the ac drive board

 

STM

1-8

FT3013/3213

5. DRIVE LAYOUT

G13

BP6

BP5

G10

G14

G12 TB3

G11

G23

 

 

 

G9

 

 

 

G8

G15

 

 

G7

G16

 

 

G17

 

 

G6

 

 

 

G5

G18

G19

 

 

 

 

TB1

G4

 

 

 

 

G3

 

G20 G21 G22

BP2

 

BP1G1 G2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BP4

 

 

 

 

 

 

BP3

 

 

G26

 

 

 

G24

 

 

 

 

 

G9

 

 

G25

 

 

 

G8

 

 

TB2

 

 

 

G2

 

 

 

 

 

 

 

 

 

 

 

 

 

G1: Main Motor Gear

 

 

 

G1

 

 

 

G2: Relay Gear

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

G23: Timing Belt Drive

 

 

 

 

 

 

 

 

 

 

 

G10 Relay gear

 

 

 

G8: Relay Gear

 

 

 

 

 

 

Gear

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

G11: Timing Belt Drive Gear

 

 

 

G9: Relay Gear

BP1: Timing Belt Pulley

 

 

 

 

 

 

 

 

B

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BP5: Timing Belt Pulley

 

 

 

 

 

 

TB1: Timing Belt

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Cleaning Unit

 

 

 

 

TB3: Timing Belt

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

G3: Fusing Drive Gear

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A

Development Section

Fusing and Exit Unit

BP6: Timing Belt Pulley

G4: Hot Roller Gear

G12: Development Gear

G7: Relay Gear

Development Unit

G6: Relay Gear

G13: Relay Gear

G5: Exit Roller Gear

G14: Toner Supply CL Gear

 

 

 

 

 

Toner Supply CL

 

 

Toner Supply Unit

 

 

 

 

 

 

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STM

A

G15: Registration CL

Gear

Registration CL

Registration Rollers

G20: Relay Gear

G17: Relay Roller CL

Gear

Relay Roller CL

G16: 2nd Relay Roller Gear

2nd Relay Rollers

G18: Relay Gear

G19: 1st Relay Roller Gear

1st Relay Rollers

Paper Feed Section

BP2: Timing Belt Pulley

G22: Relay Gear

Paper Feed Section

G21: Paper Feed CL

Gear

Paper Feed CL

Feed Rollers

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1-10

B

G24: Timing Belt Drive

Gear

BP3: Timing Belt Pulley

TB2: Timing Belt

BP4: Timing Belt Pulley

G25: Relay Gear

G26: Drum Drive Gear

FT3013/3213

6.COPY PROCESSES AROUND THE DRUM

2.EXPOSURE

1.DRUM CHARGE

3.ERASE

8.QUENCHING

4.DEVELOPMENT

7.CLEANING

6. PAPER

5. IMAGE TRANSFER

SEPARATION

 

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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. The 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 friction between the carrier and toner particles.)

5. 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.

6. 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 pawl help to separate the paper from the drum.

7. CLEANING

The cleaning blade removes any toner remaining on the drum.

8. QUENCHING

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

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FT3013/3213

7. COPY PROCESS CONTROL

 

Grid Voltage

Exposure Lamp

Development Bias

Erase Lamp

 

Voltage

Voltage

 

 

 

Image

Standard image

 

 

Depends on

Base exposure lamp

Base bias voltage factor

Density

density grid voltage

voltage (Manual or ADS

(Manual or ADS mode

paper size

Control

(--680 V)

mode) (SP48)

[SP34])

and

 

 

 

 

reproduction

 

+

+

+

 

ratio

 

Drum residual voltage

VL correction factor

 

 

Image bias voltage

 

 

(Vr) correction factor

+

adjustment factor

 

 

(SP67)

Reproduction ratio

(SP37)

 

 

+

correction factor

 

 

 

 

 

 

 

(FT3213 copier only)

 

 

 

 

 

+

 

 

Auto image density

 

 

 

level factor (SP34)

 

Drum residual voltage

 

 

 

 

(Vr) correction factor

 

 

 

 

 

 

 

 

Note:

 

 

 

 

Base bias voltage at

 

 

 

 

manual ID level 7 can be

 

 

 

 

adjusted by SP50

 

 

 

 

 

 

Toner

Standard ID sensor

Same as image density

 

ID sensor

Depends on ID sensor

Density

grid voltage

control

bias setting (SP33)

pattern erase

Detection

(--460 V)

 

 

(Vsg

 

 

 

+

 

 

detection:

 

Drum wear correction

 

Note:

Full erase)

 

factor (SP57)

 

For initial 499 copies

 

 

 

 

bias voltage is increased

 

 

 

 

by --20 volts

 

Residual

Standard ID sensor

Same as image density

0 Volts (Fixed)

Full erase

Voltage

grid voltage

control

 

(All LEDs ON)

(Vr)

(--460 V)

 

 

 

Detection

+

 

 

 

 

Drum wear correction

 

 

 

 

factor (SP57)

 

 

 

Between

0 Volts (Fixed)

Exposure lamp turns off

--160 Volts (Fixed)

Full erase

Copies

 

 

+

(All LEDs ON)

 

 

 

 

 

 

 

 

Image bias voltage

 

 

 

 

adjustment factor

 

 

 

 

(SP37)

 

 

 

 

+

 

 

 

 

Drum residual voltage

 

 

 

 

(Vr) correction factor

 

 

 

 

 

 

NOTE: The boxed items can be adjusted by SP mode.

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STM

Ricoh FT3313, FT3113, FT3013, FT3213 Service Manual

8. POWER DISTRIBUTION

AC Power (115V)

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

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 dc power supply board receives wall outlet ac power through the ac drive board.

The dc power supply board converts the wall outlet ac power input to +5 volts, +24 volts, and a zero cross signal, all of which are supplied to the main board.

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FT3013/3213

The main board supplies dc power to all copier dc components. All sensors, switches, thermistors, and the DF interface board (option) operate on +5 volts. The operation panel operates on +5 volts supplied by the main board.

All other dc components including the power relay (RA401) and the main motor relay (RA402) operate on +24 volts.

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 fusing lamp drive circuit receives a trigger signal from the main board and the fusing lamp lights. The exposure lamp does not turn on until the main board sends a trigger pulse to the exposure lamp drive circuit.

When the Start key is pressed, the main board energizes the main motor relay (RA402). Then, the main motor and the quenching lamp turn on. When the main switch is turned off, power is cut off to the main board and to RA401, and the optional drum and optics anti-condensation heaters are turned on.

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SECTION 2

DETAILED SECTION

DESCRIPTIONS

1. DRUM

1.1 DRUM CHARACTERISTICS

An organic photoconductor (OPC) drum is used in this model.

The OPC drum has the characteristics of:

1.Being able to accept a high negative electrical charge in the dark. (The electrical resistance of a photoconductor is high in the absence of light.)

2.Dissipating the electrical charge when exposed to light. (Exposure to light greatly increases the conductivity of a photoconductor.)

3.Dissipating an amount of charge in direct proportion to the intensity of the light. That is, where stronger light is directed to the photoconductor surface, a smaller voltage remains on the drum.

4.Being less sensitive to changes in temperature (when compared to selenium F type drums).

5.During the drum’s life, drum residual voltage gradually increases and the photoconductive surface becomes worn.

Therefore, some compensation for these characteristics is required.

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STM

1.2 DRUM UNIT

[E]

[A]

[G]

[F]

[C]

[D]

[B]

[C] [D]

The drum unit [A] consists of an OPC drum [B], ID sensor board [C] and a pick-off pawl [D]. When the drum, the pick-off pawl, or the ID sensor is replaced or cleaned, the drum unit must be removed from the copier. Therefore, the drum has a coupling device which is connected to the drum drive gear [E]. The ID sensor connector [F] is used for the ID sensor.

The main motor provides rotation directly to the drum through a series of gears.

The pick-off pawl [D] is always in contact with the drum surface.

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FT3013/3213

2. DRUM CHARGE

2.1 OVERVIEW

[C]

 

[B]

[D]

[D]

[A]

This copier uses a double wire scorotron and a highly sensitive OPC drum [A]. The corona wires [B] generate a corona of negative ions when the CC/Grid/Bias power pack [C] applies a high voltage. The CC/Grid/Bias power pack also applies a negative high voltage to a stainless steel grid plate [D]. This insures that the drum coating receives a uniform negative charge as it rotates past the corona unit.

The exhaust fan, located above the copy exit, causes a flow of air from the upper area of the development unit through the charge corona unit. This prevents an uneven build-up of negative ions that can cause uneven image density. The exhaust fan runs at half speed when in the stand-by condition and at full speed while copying.

The exhaust fan has an ozone filter (active carbon) which adsorbs ozone (O3) generated by the charge corona. The ozone filter decreases in efficiency over time as it adsorbs ozone. The ozone filter should be replaced at every 80K copies.

The flow of air around the charge corona wires may deposit paper dust or toner particles on the corona wire. These particles may interfere with charging and cause low density bands on copies. To help prevent this, a wire cleaner cleans the corona wire when the operator slides the corona unit out and in.

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2.2 CHARGE CORONA WIRE CLEANER MECHANISM

[B]

[A]

[D] [C]

Pads [A] above and below the charge corona wires clean the wires as the charge unit is manually slid in and out.

The cleaner pad bracket [B] rotates when the charge unit is fully extended and the bracket is pulled up against the rear endblock [C]. This moves the pads against the corona wires (see illustration). If the charge unit is not fully extended, the pads do not touch the corona wires.

The pads move away from the wires when the charge unit is fully inserted and the cleaning bracket is pushed against the front endblock [D].

After copier installation the key operator should be instructed to use this mechanism when copies exhibit white streaks, (low image density bands).

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FT3013/3213

2.3 CHARGE CORONA CIRCUIT

VA [24]

CN119-7

CN1-1

C

Charge Corona

VC [5]

CN119-6

CN1-2

 

CC Trig [ 24]

CN119-5

CN1-3

Power Pack -

 

 

 

 

CC/Grid/Bias G

Grid

 

CN119-3

CN1-5

(P1)

Grid Trig (PWM) [00/5]

 

 

 

 

 

GND [0]

CN119-1

CN1-7

B

 

 

 

 

 

 

Development

 

 

 

 

 

 

 

 

Bias

Main Board (PCB 1)

 

t2

 

 

 

 

PWM Duty cycle

 

 

 

t1

 

 

 

=t2/t1 x 100 (%)

 

The main board supplies +24 volts to the CC/Grid/Bias power pack at CN1-1 as the power supply source. After the Start key is pressed the CPU drops CN1-3 from +24 volts to 0 volts. This energizes the charge corona circuit within the CC/Grid/Bias power pack, which applies a high negative voltage of approximately --7.0 K volts to the charge corona wires. The corona wires then generate a negative corona charge.

The grid plate limits the charge voltage to ensure that the charge does not fluctuate and that an even charge is applied to the drum surface.

The grid trigger pulse applied to CN1-5 is a pulse width modulated signal (PWM signal). This signal is not only a trigger signal, it also changes the voltage level of the grid. As the width of the pulse applied increases (see arrow in above illustration), the voltage of the grid also increases (becomes more negative).

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