Ricoh DS5330 DUPLEX AND LCT UNIT

DUPLEX AND LCT UNIT

Duplex and

LCT Unit

1 February 1994 OVERALL MACHINE INFORMATION

1. OVERALL MACHINE INFORMATION

1.1 SPECIFICATION

Configuration: LCT Table or Duplex and LCT Table

Copy Paper Size:

Duplex LCT Maximum 11" x 17"/A3 10" x 14"/B4 Minimum 8

Copy Paper Weight:

Paper Weight

Copy Paper Capacity:

Paper Capacity

1/2" x 51/2"/A5 sideways 81/2" x 11"/A4

Duplex LCT

∼ 28 lb/

∼ 105 g/m

Duplex LCT

50 copies (8

1/2" x 11"/A4 or smaller)

30 copies (11" x 17"/A3, 10" x 14"/B4)

17 ∼ 28 lb/

∼ 105 g/m

approximately 1,000 sheets

Paper Feeding System: FRR system Power Source: DC 24 V and 5 V from the copier Power Consumption:

Duplex and LCT LCT Maximum 79 W 17 W Average 43 W 16 W

Dimensions (W x D x H):

Duplex and LCT LCT

27.6" x 25.8" x 15.7"/700 mm x 655 mm x 400 mm

Weight:

Duplex and LCT LCT Weight Less than 127 lb/58 kg Less than 110 lb/50 kg

OVERALL MACHINE INFORMATION 1 February 1994

1.2 MECHANICAL COMPONENT LAYOUT

6 7

1. Relay Pinch Roller

2. Inverter Roller

8. Duplex Paper Feed Roller

9. Duplex Separation Roller

3. Fork Gates

4. Duplex Transport Rollers

5. Duplex Positioning Roller

6. Actuator Roller

7. Duplex Pick-up Roller

10. LCT Separation Roller

11. LCT Paper Feed Roller

12. LCT Pick-up Roller

13. Return Pinch Roller

14. Inver Entrance Gate

Duplex and

LCT Unit

1 February 1994 OVERALL MACHINE INFORMATION

1.3 ELECTRICAL COMPONENT DESCRIPTION

SYMBOL NAME FUNCTION INDEX No.

Motors

M1 Duplex/LCT Motor Drives all mechanical components in the

duplex and LCT units. M2 Tray Motor Raises and lowers the LCT bottom plate. 4 M3 Jogger Motor Drives the jogger plates to keep paper

evenly stacked on the duplex tray.

Magnetic Clutches

MC1 Duplex Drive Clutch Transmits the drive to the duplex unit. 23 MC2 Duplex Paper Feed

Clutch

MC3 LCT Paper Feed

Clutch

MC4 Relay Clutch Turns the relay rollers. 17

Feeds the paper from the duplex tray.

Feeds the paper from the LCT.

Solenoids

SOL1 Relay Pinch Roller

Solenoid

SOL2 Duplex Entrance

Gate Solenoid

SOL3 Lock Solenoid

Duplex

SOL4 Fork Gate Solenoid1Opens and closes the appropriate fork

SOL5 Fork Gate Solenoid2Opens and closes the appropriate fork

SOL6 Duplex Position

Roller Solenoid

SOL7 Duplex Pick-up

Solenoid

SOL8 Duplex Stopper

Solenoid

SOL9 LCT Pick-up

Solenoid

Switches

SW1 Right Lower Door

Switch

SW2 Lower Tray Button

Switch

SW3 Upper Limit Switch Cuts the signal line of the tray up. 2

Separates the relay pinch roller from the

inverter roller.

Energizes to direct the paper to the

duplex unit.

Prevents the duplex unit from being

pulled out in operation.

gates according to the paper size.

Lowers the positioning roller.

Controls the up-down movement of the

duplex pick-up roller.

Stops the paper in the jogger unit.

Controls the up-down movement of the

LCT pick-up roller.

Cuts the dc power when the right lower

door is opened.

Lower the LCT bottom plate.

OVERALL MACHINE INFORMATION 1 February 1994

SYMBOL NAME FUNCTION INDEX No.

Sensors

S1 Inverter Entrance

Sensor

Detects misfeed.

S2 Inverter Exit Sensor Detects misfeed. 32 S3 Left Lower Door

Safety Sensor

S4 Duplex Unit Sensor Informs the CPU when the duplex unit is

S5 Jogger Home

Position Sensor

S6 Tray Lower Limit

Sensor

S7 Tray Upper Limit

Sensor

Informs the CPU when the left lower door

is closed.

set.

Informs the CPU when the jogger plates

are at home position.

Informs the CPU when the LCT bottom

plate reaches the lower limit position.

Informs the CPU when the LCT bottom

plate reaches the upper limit position.

S8 Upper Relay Sensor Detects misfeed. 9 S9 Lower Relay Sensor Detects misfeed. 8 S10 Duplex Entrance

Sensor

S11 LCT Paper End

Sensor

S12 Duplex Paper

Sensor

Detects misfeed.

Informs the CPU that there is no paper in

the LCT.

Detects whether or not paper is in the

duplex tray.

S13 Paper Size Sensor Detects the paper size. 1

PCBs

PCB1 Tray DC Drive

Board

Controls all electrical components in the

duplex and LCT unit.

Duplex and

LCT Unit

1 February 1994 DETAILED SECTION DESCRIPTIONS

2. DETAILED SECTION DESCRIPTIONS

2.1 DUPLEX

2.1.1 Paper Inversion

[D]

[C]

[B]

[C]

[F] [E]

[B]

[A]

[F]

[E]

In the duplex mode, paper passes through the copier inverter unit and then goes into the duplex inverter section.

When the paper reaches the fusing exit sensor, the relay pinch roller solenoid [A] is de-energized. The relay pinch roller [B] is pressed against the inverter roller [C]. The paper is sent to the lower section.

When the paper passes the copier inverter entrance sensor, the duplex entrance gate solenoid [D] is energized.

The return pinch roller [E] feeds the paper back and the duplex entrance gate [F] directs the paper to the duplex unit.

DETAILED SECTION DESCRIPTIONS 1 February 1994

2.1.2 Duplex Transport

[A]

[B]

[C]

After the copy is reversed in the inverter unit, it comes to the duplex transport section. The duplex transport unit [A] carries the copy from the inverter unit to the appropriate gate in the fork gate unit [B]. The CPU opens the gate corresponding to the copy paper size. The copy paper passes through the gate and is transported to the jogger unit [C].

Duplex and

LCT Unit

1 February 1994 DETAILED SECTION DESCRIPTIONS

2.1.3 Fork Gate Mechanism

SOL 2

SOL 1

[A]

[D]

[E]

[C]

[B]

[F]

[G]

[H]

NOTE: Numbers circled within solenoid indicate sequence of solenoid

operation.

The fork gate unit has four gates [A] through which copy paper passes to the duplex tray. Two solenoids [B, C], working together, create any of five separate states for the fork gates. (See the figure.)

Sol. 1 [B] Sol. 2 [C] Paper Size [D] OFF OFF 11" x 17"/A3 [E] ON OFF 8 [F] OFF ON 8 [G]

OFF

⇒ ON

ON 11" x 8

1/2" x 14"/B4

1/2" x 11"/A4 (L)

1/2"/A4

[H]

OFF

⇒ ON

1/2" x 51/2"/A5

Black arrows indicate initial movement.

DETAILED SECTION DESCRIPTIONS 1 February 1994

2.1.4 Drive Mechanism

[J]

[H]

[A]

[C]

[G]

[B]

[D]

[I]

[E]

[F]

When the duplex unit is set, the duplex drive gear [A] engages with the duplex gear [B]. The rotation of the duplex/LCT motor is transmitted to the duplex unit through the duplex drive clutch [C].

The duplex paper feed clutch gear then turns through the idle gear. The duplex paper feed clutch [D] controls the transmission of the rotation to the duplex paper feed [E], reverse [F], and pick-up rollers[G].

This drive is also transmitted to the duplex entrance roller gear [H] through gears and timing belts. All duplex transport rollers [I] are turning.

Drive is then transmitted back to the LCT via the duplex inverter drive gear [J], and turns the inverter rollers.

Duplex and

LCT Unit

1 February 1994 DETAILED SECTION DESCRIPTIONS

2.1.5 Duplex Stacking

[E]

[C]

[D]

[G]

[B]

[F]

15 mm

[A]

Paper is stacked in the duplex tray, which consists of the duplex delivery tray [A] and the jogger unit [B].

The duplex delivery tray transports paper from the fork gate unit to the jogger unit. The duplex delivery tray is ribbed to achieve precise stacking of paper in the duplex tray.

The jogger unit consists of a drive motor [C], jogger fences [D], duplex settlers [E], a positioning roller [F], and duplex stoppers [G]. All these components work together to achieve proper stacking of paper in the duplex tray.

When the Start key is pressed, the CPU reads the cassette paper size coding and the jogger fences are positioned 15 mm from either side of the copy paper. As paper enters the duplex tray, it is positioned under the duplex settlers. The positioning roller (made of sponge) rotates and pushes the paper up against the duplex stoppers to correct paper skew. The positioning roller is then lifted, and the jogger fences move inwards to square the stack every time a sheet enters the duplex tray.

DETAILED SECTION DESCRIPTIONS 1 February 1994

2.1.6 Jogger Drive Mechanism

[B]

[D]

[E]

[F]

[C]

[A]

Both the front [A] and rear [B] fences of the jogger unit are attached to the same wire [C]. The jogger drive pulley [D] is mounted on the jogger motor shaft. When the jogger drive pulley turns, both fences move the same distance in opposite directions. The jogger home position sensor [E] informs the CPU when the jogger is at the home position.

In duplex mode, when the Start key is pressed, the jogger fences are driven outward by the stepper motor, and the sensor actuator plate [F] slides through the slot of the jogger home position sensor to the reference home position. After the home position is referenced, the jogger fences move inward and the stop position is determined by the paper size (cassette code).

Duplex and

LCT Unit

1 February 1994 DETAILED SECTION DESCRIPTIONS

2.1.7 Duplex Positioning Roller

[D]

[C]

[B]

[A]

[E]

[F]

-- Drive Mechanism -The duplex positioning roller [A] is driven by the main drive belt. Power is

transferred from the main drive belt to the positioning roller through the positioning roller pully [B], the positioning drive shaft [C], the positioning roller pulley [D], and the rubber belt.

-- Up and Down Mechanism -The positioning roller release spring [E] lifts the positioning roller 7 millimeters

(0.29") above the jogger bottom plate and holds it in this position so that it does not interfere with the lateral stacking process. When a sheet is fed into the duplex tray, the positioning roller solenoid [F] energizes, pulling the positioning roller down to fully advance the copy paper up to the duplex stopper.

DETAILED SECTION DESCRIPTIONS 1 February 1994

2.1.8 Duplex Tray Sensors

[F]

[A]

[E]

[D]

[C]

[B]

Duplex Entrance Sensor

When paper enters the duplex tray, the positioning roller bracket [A] is in the low position and the actuator roller [B] is resting on the jogger bottom plate. When the paper passes under the actuator roller, the friction of the paper turns the actuator roller. This rotation moves the entrance actuator [C] up and down, actuating the entrance sensor.

There are several slots in the entrance actuator [C] that activate the sensor [D] successively when the actuator roller rotates. If there are more than two changes (ON - OFF - ON or OFF - ON - OFF) during the checking period, the CPU determines that paper has entered the duplex tray.

Duplex Paper Sensor

When there is copy paper in the duplex tray, the paper actuator [E] is moved up and away from the duplex paper sensor [F], which activates the photointerrupter (5V

→ 0V). This informs the CPU that paper is in the duplex

tray. When the last sheet of paper has entered the duplex tray, the CPU checks the duplex paper sensor signal and lights the second original instructions in the guidance display.

Duplex and

LCT Unit

1 February 1994 DETAILED SECTION DESCRIPTIONS

2.1.9 Duplex Stopper and Pick-up Roller Mechanism

[D]

[C]

[A]

[B]

The pick-up roller bracket is lifted up by the rear most duplex stopper [A]. Both the duplex stopper and the pick-up roller [B] are moved by solenoids.

When paper is being fed, the duplex stopper solenoid [C] is energized and the stoppers are lowered. The pick-up roller bracket rotates downward and the pick-up roller drops onto the copy paper. The duplex pick-up solenoid [D] is energized 160 milliseconds after the duplex feed clutch turns on. Paper feed then begins. The pick-up roller stays in contact with the paper during paper feed.

DETAILED SECTION DESCRIPTIONS 1 February 1994

2.2 LCT (Large Capacity Tray)

2.2.1 LCT Drive Mechanism

[E]

[F]

[H]

[D]

[A]

[G]

[B]

[C]

Drive from a reversible motor [A] is transmitted through a worm gear [B] to the drive pulley [C] shaft. The tray wires have metal hooks on them. These hooks are set to the stays [D] of the bottom plate, so, when the drive pulley turns (clockwise, rear view), the hooks on the wires move the tray upward. The tray goes up until the upper limit sensor [E] is actuated by the top sheet pushing up the pick-up roller [F].

To lower the tray, the pulley turns counterclockwise until the lower limit sensor [G] is actuated by the actuator of the bottom plate [H].

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