Ricoh ps490 SPECIFICATIONS

PAPER TRAY UNIT

(Machine Code: A860/B390)

10 August, 2001 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/printer)

Power Consumption: Max: 30 W (Copying/printing)

Weight: 25 kg (55 lbs)

A5 to A3 HLT lengthwise to DLT

120 Vac:

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

220 ~ 240 Vac:

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

23 W (Optional Tray Heater On)

Average: 17 W (Copying/pr inting)

15 W (Optional Tray Heater On)

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

Options

B390-1

MECHANICAL COMPONENT LAYOUT 10 August, 2001

1.2 MECHANICAL COMPONENT LAYOUT

B390V101.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

B390-2

10 August, 2001 ELECTRICAL COMPONENT LAYOUT

1.3 ELECTRICAL COMPONENT LAYOUT

6 7

B390V102.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

B390-3

ELECTRICAL COMPONENT DESCRIPTION 10 August, 2001

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/printer 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/printer 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/printer.

Removes humidity from the paper in the trays.

B390-4

10 August, 2001 DRIVE LAYOUT

1.5 DRIVE LAYOUT

1. Tray motor

2. Drive belt

3. Upper paper feed clutch

4. Relay clutch

B390V103.WMF

5. Lower paper feed clutch

6. Relay roller

7. Lower paper feed roller

8. Upper paper feed roller

B390-5

Options

PAPER FEED AND SEPARATION MECHANISM 10 August, 2001

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/printer. 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]

B390D104.WMF

B390-6

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