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/minute
	(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.

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COMPONENT LAYOUT

15 January 1992

2. COMPONENT LAYOUT

2.1 MECHANICAL COMPONENTS

1

2

3

4

5

6

10		9	8		7
1.	Pulse Generator Disk			6.	Exit Roller
2.	Friction Belt			7.	Transport Belt
3.	Pick-up Lever			8.	Transport Belt Roller
4.	Pick-up Roller			9.	Feed Roller
5.	Original Table			10.	Relay Roller

2.2 ELECTRICAL COMPONENTS

4 5 6

2

3

7 8

9

1

10

11

1.	Pick-up Solenoid	7.	Insert Original Indicator
2.	Registration Sensor	8.	Original Misfeed Indicator
3.	Original Set Sensor	9.	Lift Switch
4.	Feed Clutch	10.	DF Main Board
5.	Pulse Generator Sensor	11.	DF Transformer
6.	DF Motor

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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	1
		the stack of originals in preparation for
		original feed-in.
Clutch
CL1	Feed Clutch	Turns on to transmit the main motor rotation	4
		to the feed roller.
Switch
SW1	Lift Switch	Informs the CPU when the DF is lifted and	9
		also serves as the misfeed reset switch for
		the DF.
Sensors
S1	Pulse Generator	Supplies timing pulse to the DF main board.	5
	Sensor
S2	Original Set	Informs copier CPU that originals have been	3
	Sensor	placed and causes the Insert Original
		indicator to go out.
S3	Registration	Sets original stop timing and checks for	2
	Sensor	original misfeeds.
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	Turns on when an original is misfed.	8
	Indicator
LED2	Insert Original	Turns off when the originals are inserted into	7
	Indicator	the original table.

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POWER DISTRIBUTION

15 January 1992

4. POWER DISTRIBUTION

AC Drive Board (PCB2)

				+24 V (VA)
115 Vac	DF		Rectify	Regulate
220–230 Vac	Transformer	25 Vac	&
240 Vac	(TR1)		Smooth
				+5 V (VC)
				Regulate
			DF Main Board (PCB1)

The document feeder uses two dc power levels: +24 volts, and +5 volts.

When the main switch is turned on, the DF transformer receives the wall outlet ac power through the ac drive board and outputs 25 volts ac to the DF main board. Then, the dc power supply circuit on the DF main board converts the 25 volts ac input to +24 volts and +5 volts.

+24 volts is used by the DF motor, the 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. Receiving this signal, the copier CPU recognizes that the document feeder is installed and sends the "DF confirmed" signal to the DF CPU.

When originals are placed on the original table, the Insert Original indicator turns off and the DF CPU sends the "original set" signal to the copier CPU to inform that the originals have been set.

When the Start key is pressed, the copier CPU sends the "feed-in" signal to the document feeder. On receipt of this signal, the DF CPU energizes the DF motor, the pick-up solenoid, and the feed clutch to feed-in the bottom sheet of the original stack onto the exposure glass. The pick-up solenoid, and the feed clutch remain energized until the original’s leading edge reaches the registration sensor. The DF motor turns off shortly after the original’s trailing edge passes the registration sensor. Then, the DF motor pauses and reverses for a moment to align the edge of the original with the scale.

The scanner starts, and the start timing does not depend on the progress of the original through the DF. When the scanner reaches the return position, the copier CPU sends the "original change" signal to the DF CPU in order to exchange the original with the next original.

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INTERFACE CIRCUIT

15 January 1992

6. INTERFACE CIRCUIT

Copier Main Board (PCB1)

DF Interface Board (PCB4)

DF Main Board (PCB1)

	+5V	CN120-2	CN2-1		RXD
			Fiber Optics
		CN120-5
	TXD		CN2-4
			CN1	CN118	CPU
CPU
		CN120-4	CN2-2		TXD
	RXD		Fiber Optics
		CN120-1	CN2-3

The copier CPU and the DF CPU communicate via the interface board and fiber optics. The interface board changes the optical signals to electrical signals (and vice versa).

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