Ricoh RT35 SPECIFICATIONS

LCT

(A667)

25 April 1997 SPECIFICATIONS

1. SPECIFICATIONS

Copy Paper Size: A4 sideways or 11" x 8

Copy Paper Weight: 60 g/m

to 90 g/m2 (16 lb to 24 lb)

Tray Capacity: Sheets: 1500 (80 g/m

1/2

“

) or Stack height: Less than 180 mm (7")

Power Source + 24Vdc and +5Vdc from the main machine Power Consumption: 22.1 W Dimensions (W x D x H): 290 x 440 x 545 mm (11.4" x 17.3" x 21.5") Weight: 13 kg (28.6 lb)

A667-1

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COMPONENT LAYOUT 25 April 1997

2. COMPONENT LAYOUT

2.1 MECHANICAL COMPONENT LAYOUT

1. Relay Roller

2. Paper Feed Roller

3. Upper Limit Sensor

4. Timing Belt

5. Side Fence

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6. End Fence

7. Bottom Plate

8. Paper End Sensor

9. Relay Sensor

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25 April 1997 COMPONENT LAYOUT

2.2 ELECTRICAL COMPONENT LAYOUT

1. Relay Sensor

2. Transport Motor

3. Paper Feed Motor

4. Stack Height Sensor 3

5. Paper Size Sensor

6. Stack Height Sensor 2

7. Unit Set Switch

8. Stack Height Sensor 1

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9. LCT Drive Board

10. Lower Limit Sensor

11.Tray Lift Motor

12. LCT Cover Switch

13. Tray Down Switch

14. Paper End Sensor

15. Upper Limit Sensor

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A667-3

COMPONENT LAYOUT 25 April 1997

2.3 ELECTRICAL COMPONENT DESCRIPTIONS

Refer to the point-to-point diagram on the waterproof paper for the locations of these components.

Symbol

Printed Circuit Board

PCB 1 9

Motors

M 1 2 Transport Drives the transf er roller. M 2 3 Paper Feed Drives the paper feed roller. M 3 11 Tray Lift Lifts up and lowers the bottom plate.

Sensors

S 1 1

S 2 8 Paper Near-end 1 Detects the amount of p aper in the LCT. S 3 6 Paper Near-end 2 S 4 4

S 5 5

S 6 10 S 7 14 Paper End Detects the paper end condition.

S8 15

Index

No.

Description Notes

LCT Drive Interfaces the se nsor signals with t he

main machine, and transfers th e m ot or drive signals from the main machi ne.

Relay Detects the leadi ng edge of paper to

determine the paper feed motor stop timing. Also detects misfeeds.

Note that these sensors may not be

Paper Near-end 3 Paper Size Detects whether A4 size paper or Letter

Lower Limit Detects when the bottom plate i s at i ts

Upper Limit Detects when the paper stack in t he

used, depending on the main machi ne.

size paper is be i ng used.

lowest positi on.

paper tray is at the cor rect height to stop the tray lift motor.

Switches

SW 1 7

SW 2 12

SW 3 13 Tray Do w n Lowers th e bottom plate.

Unit Set Cuts the dc power line and detects

whether the LCT is open or not.

LCT Cover Cuts the dc power line of the lift motor and

detects whether the LCT cover is open or not.

A667-4

25 April 1997 COMPONENT LAYOUT

2.4 DRIVE LAYOUT

1. Relay Rolller

2. Transport Motor

3. Paper Feed Motor

4. Timing Belt

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5. Drive Pulley

6. Tray Lift Motor

7. Paper Feed Roller

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DETAILED SECTION DESCRIPTIONS 25 April 1997

3. DETAILED SECTION DESCRIPTIONS

3.1 PAPER LIFT MECHANISM

[C]

[A]

[I]

[D]

[J]

[F]

[H]

[E]

[H]

[B]

[G]

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The upper limit sensor [A] controls the tray lift motor [B]. The actuator [C] for the sensors on the feed roller shaft [D]. The tray lift motor drives the bottom plate [E] which is attached to the timing belts [F] through the gear [G] and drive pulleys [H].

The paper feed rollers [I] are always lowered by the weights [J]. When the LCT cover is closed, the tray lift motor starts rotating and the bottom plate starts lifting.

When the top sheet of the paper stack raises the paper feed roller, the upper limit sensor is activated and the tray lift motor stops.

During copying, when the level of the paper stack has fallen past a certain point (when the actuator [C] exits the upper limit sensor), the tray lift motor turns on to maintain the correct level for paper feed.

A667-6

25 April 1997 DETAILED SECTION DESCRIPTIONS

3.2 PAPER FEED MECHANISM

[A]

[B]

[F]

[A]

[E]

[D]

[C]

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The LCT uses the corner separator system. The paper feed rollers [A] always contact the top of the paper stack because of the weights [B] on the paper feed shaft. When the LCT receives the paper feed start command, the paper feed motor [C] and the transport motor [D] start to feed the paper. When the leading edge of the paper activates the relay sensor [E], the paper feed motor stops but the transport motor stays on to feed the paper continuously. At this time, the paper feed roller is also rotating to help feed the paper. The gear inside the one-way clutch [F] allows this movement. When the leading edge of the paper activates the registration sensor of the main machine, the transport motor stops.

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