Ricoh FT3113.313 OPERATING INSTRUCTIONS

DOCUMENT FEEDER

15 January 1992 SPECIFICATIONS

1. SPECIFICATIONS

Original Size: Maximum: A3 or 11" x 17"

Minimum: A5 Lengthwise or 51/2" x 81/2"
Original Weight: 53 to 105 g/m2 (14 to 28 lb)
Original Feed: Automatic Feed - ADF mode
Original Tray Capacity: 30 sheets - 80 g/m2 (20 lb)
Original Set: Face up - First sheet on top
Original Transport: One flat belt
Copying Speed: 13 copies/min ute

(A4 lengthwise or 81/2" x 11" lengthwise)
Power Consumption: 35 W
Dimensions (W x D x H): 590 x 443 x 100 mm (23.3" x 17.5" x 4.0")
Weight: Approximately 7 kg (15.5 lb)

• Specifications are subject to change without notice.

1

9

COMPONENT LAYOUT 15 January 1992

2. COMPONENT LAYOUT

2.1 MECHANICAL COMPONENTS

1

234 65

8

910

7

1. Pulse Generator Disk

2. Friction Belt

3. Pick-up Lever

4. Pick-up Roller

5. Original Table

6. Exit Roller

7. Transport Belt

8. Transport Belt Roller

9. Feed Roller

10. Relay Roller

2.2 ELECTRICAL COMPONENTS

2

1

4

3

5

6

7

8

10

11

1. Pick-up Solenoid

2. Registration Sensor

3. Original Set Sensor

4. Feed Clutch

5. Pulse Generator Sensor

6. DF Motor

7. Insert Original Indicator

8. Original Misfeed Indica to r

9. Lift Switch

10. DF Main Board

11. DF Transformer

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15 January 1992 ELECTRICAL COMPONENT DESCRIPTIONS

3. ELECTRICAL COMPONENT DESCRIPTIONS

SYMBOL NAME FUNCTION LOCATION

Motor

M1 DF Drives all the document feeder components. 6

Solenoid

SOL1 Pick-up Solenoid Energizes to press the pick-up lever against

the stack of originals in preparation for
original feed-in.

Clutch

CL1 Feed Clutch Turns on to transmit the main motor rotation

to the feed roller.

Switch

SW1 Lift Switch Informs the CPU when the DF is lifted and

also serves as the misfeed reset switch for
the DF.

1

4

9

Sensors

S1 Pulse Generator

Sensor

S2 Original Set

Sensor

S3 Registration

Sensor

Printed Circuit Board

PCB1 DF Main Board Controls all DF functions. 10

Transformer

TR1 DF Transformer Steps down the wall voltage to 25 volts ac. 11

LEDs

LED1 Original Misfeed

Indicator

LED2 Insert Original

Indicator

Supplies timing pulse to the DF main board. 5

Informs copier CPU that originals have been
placed and causes the Insert Original
indicator to go out.

Sets original stop timing and checks for
original misfeeds.

Turns on when an original is misfed. 8

Turns off when the originals are inserted into
the original table.

3

2

7

3

POWER DISTRIBUTION 15 January 1992

4. POWER DISTRIBUTION

+24 V (VA)

Regulate

+5 V (VC)

Regulate

AC Drive Board
(PCB2)

115 Vac
220–230 Vac
240 Vac

DF
Transformer
(TR1)

25 Vac

Rectify
&
Smooth

DF Main Board (PCB1)

The document feeder uses two dc powe r levels: +24 volts, and +5 volts.
When the main switch is turned on, th e DF t ran sfo rmer receives the wall

outlet ac power thro ugh the ac drive board and outputs 25 volt s a c to th e DF
main board. Then, the dc power supply circuit on the DF main board con vert s
the 25 volts ac input to +24 volts and +5 volts.

+24 volts is used by the DF moto r, th e pick-up solenoid, and the feed clutch.
+5 volts is used by other electrical components.

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15 January 1992 BASIC OPERATION

5. BASIC OPERATION

When the main switch is turned on, the DF CPU sends the "DF installed"
signal to the copier CPU. Receivin g th is sig nal, the copier CPU recognizes
that the document fee de r is inst alle d an d sen ds the "DF confirmed" signal to
the DF CPU.

When originals are placed on the origin al ta ble, the Insert Original indicat or
turns off and the DF CPU sends the "origin al set" signal to the copier CPU to
inform that the orig ina ls h ave bee n set .

When the Start key is pressed, the copier CPU sends the "feed-in" signal to
the document feeder. On rece ipt of th is signa l, th e DF CP U energizes the DF
motor, the pick-up sole no id, and the fee d clut ch to fee d-in the bottom sheet of
the original stack onto the exposu re glass. The pick-up solenoid, and the
feed clutch remain energized until t he origin al’s leading edge reaches the
registration sensor. The DF motor tu rns off shortly after the original’s trailing
edge passes the registration sensor. Then, the DF moto r pau ses an d
reverses for a moment to alig n the edge of the original with th e scale .

The scanner starts, and the start timing does not depend on the progress of
the original through the DF. When the sca nner reaches the return position,
the copier CPU sends the "origina l chan ge" sign al to the DF CPU in order to
exchange the origina l wit h th e ne xt original.

5

Fiber Optics
Fiber Optics

INTERFACE CIRCUIT 15 January 1992

6. INTERFACE CIRCUIT

Copier Main Board (PCB1) DF Interface Board (PCB4)

CPU

TXD

RXD

+5V

CN120-2

CN120-5

CN120-4

CN120-1

CN2-1

CN2-4

CN1

CN2-2

CN2-3

DF Main Board (PCB1)

RXD

CN118

TXD

The copier CPU and the DF CPU communicate via the interface board and
fiber optics. The interfa ce bo ard chan ge s the opt ical sign als to electrical
signals (and vice versa).

CPU

6