Ricoh A318 Bedienungsanleitung

DOCUMENT FEEDER

1. SPECIFICATIONS

Original Size and Weight: – Thin original mode –

Maximum A3/11" x 17"

Minimum B6/51/2" x 81/2"

Weight 41 to 128 g/m2(11 to 34 lb)

– Thick original mode –

Maximum A3 / 11" x 17"

Minimum B6 / 51/2" x 81/2"

Weight 52 to 128 g/m2(14 to 34 lb)

– Auto reverse mode –

Maximum A3 / 11" x 17"

Minimum B6 lengthwise /

51/2" x 81/2" lengthwise

Weight 53 to 105 g/m2(14 to 28 lb)

Original Feed: Automatic feed — ADF mode

Manual feed one by one — SADF mode

Original Table Capacity: 35 sheets / 64 g/m2(17 lb)

Original Set: Face up. First sheet on top

Original Transport: One flat belt

Copy Speed: 20 copies/minute for A4/81/2" x 11" sideways

Power Consumption: 20 W

Dimensions (W x D x H): 670 x 460 x 103 mm (26.4" x 18.1" x 4.1")

Weight: Approximately 9.0 kg (19.916 lb)

Document

Feeder

1 May 1993 SPECIFICATIONS

2.COMPONENT LAYOUT

– Mechanical Components –

1.PulseGenerator Disk 6. Inverter Pawl

2. Friction Belt 7. Inverter Roller

3.Pick-upLever8. Transport Belt

4. Original Table 9. Pick-up Roller

5. Exit Roller 10. Feed Roller

– Electrical Components –

1. Original Set Sensor 9. DF Main Board

2.RegistrationSensor 10. Feed-outMotor

3.PulseGenerator Sensor 11. Inverter Solenoid

4.Original Width Sensor 12. Feed-outSensor

5.Pick-upSolenoid 13. Original Select Switch

6.BeltDriveMotor 14. Feed-inSolenoid

7.Indicator Panel 15. DF PositionSensor

8. Lift Switch (A054, A072, A111 copiers only)

123 456

789

34567

14 12

COMPONENTLAYOUT 1 May1993

3. ELECTRICAL COMPONENT DESCRIPTIONS

Symbol Name Function Index No.

Motors

M1 Belt Drive Motor DC servomotor that drives to the transport belt

and feed-in system (pick-up roller, feed roller,

pull-out roller and relay roller).

M2 Feed-out Motor DC servomotor that drives the feed-out unit of

the DF. 10

Solenoids

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

the stack of originals in preparation for original

feed-in.

SOL2 Feed-in Solenoid Turns on to engage the feed-in clutch so

rotation is transmitted to the feed roller,

pull-out rollers, and relay rollers.

SOL3 Inverter Solenoid Energizes to invert the original when copying

two sided originals. 11

Switches

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

also serves as the jam reset switch for the DF. 8

SW2 Original Select

Switch Selects thick original mode or thin original

mode. 13

Sensors

S1 Original Set

Sensor Informs copier CPU that originals have been

placed and causes the Insert Original

indicator to go out.

S2 Registration

Sensor Sets original stop timing and measures

original length. 2

S3 Original Width

Sensor Determines the width of the originals. 4

S4 Pulse Generator

Sensor Generates pulses used to measure the

original length. 3

S5 Feed-out Sensor Checks for original misfeeds and sets original

stop timing when in auto reverse mode. 12

S6 DF Position Sensor Detects when the document feeder is

positioned about 10 cm above exposure

glass. (A111 copier only)

Printed Circuit Boards

PCB1 DF Main Board Controls all DF functions. 9

PCB2 Indicator Panel

Board Contains operator indicators. 7

Document

Feeder

1 May 1993 ELECTRICAL COMPONENT DESCRIPTIONS

4. OVERALL MACHINE CONTROL

The DF CPU monitors the input signals from the sensors and switches, and

energizes the solenoids and the indicator LEDs directly. The belt drive motor

and the inverter motor are controlled by the DF CPU through their respective

driver ICs. The exchanged signals are shown in the tables on the next page.

DF Main Board (PCB1)

RXD

TXD

Copier Main Board (PCB1)

CPU

ROM

Driver

TXD

RXD

Feed-out

Motor

Belt Drive

Motor

Solenoids

Indicators

Sensors

Switches

OVERALL MACHINE CONTROL 1 May 1993

1. DF →Copier

No.Signal Name Definition

1Original Set Originals have been set on the original table

2Copy Start Allowsthe copierto start the copysequence

3Lift Up The DFhas been lifted

4DF Misfeed A misfeed has occurred in the DF

2. Copier →DF

No.Signal Name Definition

1Feed-in Requeststhe DF to feed in the original

2Feed-out Requeststhe DF to feed out the original

3Invert Original Requeststhe DF to invert the original

4Auto Feed Shiftsthe DF to the auto feed mode

5Original Stay The machine attempted to use the DFbut an original from

the previous copy run remainson the exposure glass

31 October1995 OVERALL MACHINE CONTROL

5. BASIC OPERATION

1. One-sided Original Feed

When an original is inserted face up into the DF, the Insert Original indicator

light goes out and the DF informs the copier CPU that originals have been set.

When the Start key is pressed, the copier CPU sends the feed-in signal to

the DF. On receipt of this signal, the DF energizes the pick-up solenoid, the

feed-in solenoid, and the belt drive motor in order to feed-in the bottom sheet

of the original stack onto the exposure glass. The pick-up solenoid and the

feed-in solenoid remain energized until the original leading edge reaches the

DF registration sensor. The belt drive motor turns off shortly after the

original’s trailing edge passes the DF registration sensor.

While feeding the original, the DF registration sensor and the paper width

sensor check the original size.

Just when the original trailing edge has passed the DF registration sensor,

the DF CPU sends the copy start signal to the copier.

When the scanner reaches the return position, the copier CPU sends the

feed-out and the feed-in signals to the DF CPU in order to exchange the

original with the next original. At this time, the scanner begins returning to the

home position.

When the scanner comes to the return position after scanning the last

original, the copier CPU only sends the feed-out signal in order to feed-out

the last original.

BASIC OPERATION 1 May 1993

2. Two-sided Original Feed

Unlike one-sided original feed, the back side of the original must be copied

first to keep the originals and copies in the correct order.

During original feed-in, the sequence is the same as for one-sided feed;

however, the DF CPU also energizes the inverter motor and the inverter

solenoid a short time after the original trailing edge has passed the DF

registration sensor. The belt drive motor continues to feed the original until

the original leading edge passes the feed-out sensor. At this point the inverter

mechanism inverts the original, in preparation for copying the back side.

Then the belt drive motor reverses and the original is fed towards the left

scale and is aligned against the scale. The DF CPU sends the copy start

signal a short time after the original trailing edge has passed the feed-out

sensor.

When the scanner reaches the return position, the copier CPU sends the

invert original signal to the DF CPU in order to make a copy of the front side.

The original is inverted in the same way as for back side copying.

3. Semi-automatic Document Feed

If a single original is inserted into the original table and copied, the DF shifts

to the semi-automatic feed mode and lights the Auto Feed indicator. The

Auto Feed indicator remains on for five seconds after the copier main motor

stops. If another original is inserted within that five-second period, it is

automatically fed and copied.

Document

Feeder

1 May 1993 BASIC OPERATION

6.POWER DISTRIBUTION

6.1A110/A054 COPIERS

The DF uses threeDC power levels: +24volts,+12 volts, and +5 volts.

When the main switch is turned on, the option transformer receives the wall

outletacpower through the ac driveboard and outputs 10 volts acand26

volts ac totheoptiondcpower supply board.The option dc power supply

board thenconverts the 10volts ac inputto +5 volts dcandthe26 volts ac

input to+24 volts. Then,those twodc voltages are supplied totheDF main

board.

The regulator IC on the DF main boardfurther steps downthe+24 volts to

+12 volts.

115Vac 26Vac

10Vac

220/230/240Vac 5V

+12V+24V

+24V (VA)

+5V (VC)

Regulator

DF Main Board

(PCB1)

AC Drive

Board

(PCB2)

Option

Transformer

(TR2)

Option DC

Power Supply

Board

(PCB6)

POWER DISTRIBUTION1 May1993

6.2 A111 COPIER

The DF uses three dc power levels: +24 volts, +12 volts, and +5 volts.

When the main switch is turned on, the main transformer receives the wall

outlet ac power through 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

then converts the 10 volts ac input to +5 volts dc and the 31 volts ac input to

+24 volts. Then, those two dc voltages are supplied to the DF main board

through the copier main board.

The regulator IC on the DF main board further steps down the 24 volts to +12

volts.

115Vac

220/230/240Vac

AC Drive

Board

(PCB2)

31Vac

10Vac

+12V

+24V

+24V (VA)

+5V (VC)

Regulator

DF Main Board

(PCB1)

Main

Transformer

(TR1)

+24V (VA)

+5V (VC)

Main DC

Power

Supply

Board

(PCB3)

Copier

Main

Board

(PCB1)

Document

Feeder

1 May 1993 POWER DISTRIBUTION

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