Ricoh ps440 SPECIFICATIONS

PAPER TRAY UNIT

(Machine Code: A860)

20 September 1998 SPECIFICATIONS

1. OVERALL MACHINE INFORMATION

1.1 SPECIFICATIONS

Paper Size

Paper Weight: 60 ~ 105 g/m2, 16 ~ 28 lbs. Tray Capacity: 500 sheets (80 g/m2, 20 lbs.) x 2 trays Paper Feed System: Feed roller and friction pad Paper Height Detection: 4 steps (100%, 70%, 30%, Near end) Power Source: 24 VDC, 5 VDC (from the copier)

Power Consumption: Max:30 W (Copying)

Weight: 25 kg (55 lbs)

A5 to A3 HLT lengthwise to DLT

120 Vac:

120 V version, from the copier when the optional tray heater is installed

220 ~ 240 Vac:

230 V version, from the copier when the optional tray heater is installed

23 W (Optional Tray Heater On)

Average:17 W (Copying)

15 W (Optional Tray Heater On)

Size (W x D x H): 550 mm x 520 mm x 271 mm

Options

A860-1

MECHANICAL COMPONENT LAYOUT 20 September 1998

1.2 MECHANICAL COMPONENT LAYOUT

A860V101.WMF

1. Upper paper feed roller

2. Lower paper feed roller

3. Upper tray

4. Lower tray

5. Upper bottom plate

6. Lower bottom plate

7. Optional tray heater

A860-2

20 September 1998 ELECTRICAL COMPONENT LAYOUT

1.3 ELECTRICAL COMPONENT LAYOUT

6 7

A860V102.WMF

1. Tray main board

2. Upper lift sensor

3. Upper lift motor

4. Upper paper height 2 sensor

5. Upper paper height 1 sensor

6. Upper paper feed clutch

7. Relay clutch

8. Tray cover switch

9. Lower paper feed clutch

10. Lower paper height 2 sensor

11. Lower paper height 1 sensor

12. Vertical transport sensor

13. Upper paper end sensor

14. Lower paper end sensor

15. Lower paper size switch

16. Upper paper size switch

17. Optional tray heater

18. Lower lift motor

19. Lower lift sensor

20. Tray motor

Options

A860-3

ELECTRICAL COMPONENT DESCRIPTION 20 September 1998

1.4 ELECTRICAL COMPONENT DESCRIPTION

Symbol Name Function Index No.

Motors

M1 Tray Drives all rollers. 20 M2 Upper Lift Lifts the upper tray bottom plate. 3 M3 Lower Lift Lifts the lower tray bottom plate. 18

Sensors

S1 S2 S3 S4

S5 Vertical Transport Detects misfeeds. 12 S6

S7 S8 S9

Upper Lift Detects when the paper in the upper tray is at

the correct feed height.

Lower Lift Detects when the paper in the lower tray is at

the correct feed height.

Upper Paper End Informs the copier when the upper tray runs out

of paper.

Lower Paper End

Upper Paper Height 1

Upper Paper Height 2

Lower Paper Height 1

Lower Paper Height 2

Informs the copier when the lower tray runs out of paper.

Detects the amount of paper in the upper tray. Detects the amount of paper in the upper tray. Detects the amount of paper in the lower tray. Detects the amount of paper in the lower tray.

2 19 13 14

4 11 10

Switches

SW1 Tray Cover Detects whether the tray cover is opened or not. 8 SW2 Upper Paper Size Determines what paper size is in the upper tray. 15 SW3 Lower Paper Size Determines what paper size is in the lower tray. 16

Magnetic Clutches

MC1 MC2

MC3 Relay Drives the relay rollers. 7

PCBs

PCB1

Others

Upper Paper Feed

Lower Paper Feed

Tray Main Controls the paper tray unit and communicates

Optional Tray Heater

Starts paper feed from the upper tray. Starts paper feed from the lower tray.

with the copier.

Removes humidity from the paper in the trays.

A860-4

20 September 1998 DRIVE LAYOUT

1.5 DRIVE LAYOUT

1. Tray motor

2. Drive belt

3. Upper paper feed clutch

4. Relay clutch

A860V103.WMF

5. Lower paper feed clutch

6. Relay roller

7. Lower paper feed roller

8. Upper paper feed roller

A860-5

Options

PAPER FEED AND SEPARATION MECHANISM 20 September 1998

2. DETAILED DESCRIPTIONS

2.1 PAPER FEED AND SEPARATION MECHANISM

[A]

The paper tray holds 500 sheets. The paper feed roller [A] drives the top sheet of paper from the paper tray to the copier. The friction pad [B] allows only one sheet to feed at a time. The friction pad applies pressure to the feed roller with a spring [C].

[B]

[C]

A860D104.WMF

A860-6

20 September 1998 PAPER LIFT MECHANISM

2.2 PAPER LIFT MECHANISM

[B]

[A]

[D] [C]

[F]

[K] [G]

[H]

[A]

A860D106.WMF

[E]

[I]

[J]

[C]

[D]

[E]

A860D107.WMF

The SP modes mentioned in this section apply to A265/A267 only, and not to G038.

[B]

The paper size switch detects when the tray is pushed in. When the pa per tray is pushe d into the machine, the pin [A] for the lift motor

pressure shaft engages the lift motor coupling [B] and the pin [C] for the bottom plate lift shaft in the tray engages the bottom plate pressure lever coupling [D]. The pin [E] on the rear of the tray pushes the lock lever so that the lift motor can lift the bottom plate pressure lev er .

The lift motor turns on, and turns clockwise as viewed on the diagram. The main pressure spring [K] pulls the bottom plate pressure lever, and this lifts the tray bottom plate.

When the top of the stack touches the feed roller, the motor cannot pull up the plate any more, so it pulls the actuator [G] into the lift sensor [F].

The pressure of the feed roller on the paper is now too high, so the lift motor reverses to reduce this pressure. It reverses for 300 ms or 600 ms, depending on the paper size. For smaller paper, it reverses the larger amount (600 ms) to reduce the pressure more.

A860-7

Options

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