Ricoh ps440 SPECIFICATIONS

PAPER TRAY UNIT

(Machine Code: A860)

20 September 1998

SPECIFICATIONS

1. OVERALL MACHINE INFORMATION

1.1 SPECIFICATIONS

Paper Size:	A5 to A3
	HLT lengthwise to DLT
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)
	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
Power Consumption:	Max: 30 W (Copying)
	23 W (Optional Tray Heater On)
	Average: 17 W (Copying)
	15 W (Optional Tray Heater On)
Weight:	25 kg (55 lbs)
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

	5	1
		2
3
4
7		6
		A860V101.WMF

1.	Upper paper feed roller	5.	Upper bottom plate
2.	Lower paper feed roller	6.	Lower bottom plate
3.	Upper tray	7.	Optional tray heater
4.	Lower tray

A860-2

20 September 1998

ELECTRICAL COMPONENT LAYOUT

1.3 ELECTRICAL COMPONENT LAYOUT

1

20

19

18

2

3

4

5

6

7

8

9

17	10
16	11
	12
15	13
	14
	A860V102.WMF

1.	Tray main board	11.	Lower paper height 1 sensor
2.	Upper lift sensor	12.	Vertical transport sensor
3.	Upper lift motor	13.	Upper paper end sensor
4.	Upper paper height 2 sensor	14.	Lower paper end sensor
5.	Upper paper height 1 sensor	15.	Lower paper size switch
6.	Upper paper feed clutch	16.	Upper paper size switch
7.	Relay clutch	17.	Optional tray heater
8.	Tray cover switch	18.	Lower lift motor
9.	Lower paper feed clutch	19.	Lower lift sensor
10.	Lower paper height 2 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		Upper Lift	Detects when the paper in the upper tray is at	2
			the correct feed height.
S2		Lower Lift	Detects when the paper in the lower tray is at	19
			the correct feed height.
S3		Upper Paper End	Informs the copier when the upper tray runs out	13
			of paper.
S4		Lower Paper End	Informs the copier when the lower tray runs out	14
			of paper.
S5		Vertical Transport	Detects misfeeds.	12
S6		Upper Paper	Detects the amount of paper in the upper tray.	5
		Height 1
S7		Upper Paper	Detects the amount of paper in the upper tray.	4
		Height 2
S8		Lower Paper	Detects the amount of paper in the lower tray.	11
		Height 1
S9		Lower Paper	Detects the amount of paper in the lower tray.	10
		Height 2
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		Upper Paper	Starts paper feed from the upper tray.	6
		Feed
MC2		Lower Paper	Starts paper feed from the lower tray.	9
		Feed
MC3		Relay	Drives the relay rollers.	7
PCBs
PCB1		Tray Main	Controls the paper tray unit and communicates	1
			with the copier.
Others
H1		Optional Tray	Removes humidity from the paper in the trays.	17
		Heater

A860-4

20 September 1998

DRIVE LAYOUT

1.5 DRIVE LAYOUT

1

2

3

8

4

5

6

7

A860V103.WMF

1.	Tray motor	5.	Lower paper feed clutch
2.	Drive belt	6.	Relay roller
3.	Upper paper feed clutch	7.	Lower paper feed roller
4.	Relay clutch	8.	Upper paper feed roller

Options

A860-5

PAPER FEED AND SEPARATION MECHANISM

20 September 1998

2. DETAILED DESCRIPTIONS

2.1 PAPER FEED AND SEPARATION MECHANISM

[A]

[B]

[C]

A860D104.WMF

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].

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]
	[B]

[I] [J]

[C]

[D]

[E]

A860D107.WMF

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

The paper size switch detects when the tray is pushed in.

When the paper tray is pushed 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 lever.

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.

Options

A860-7