Ricoh ps400 Service Manual

PAPER TRAY UNIT

(Machine Code: A861)

17 May, 1999 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 1 tray
Paper Feed System: Feed roller and friction pad
Paper Height Detection: 4 steps (100%, 70%, 30%, Near end)
Power Source: 24 VDC and 5VDC (from the copier):

Power Consumption: Max:20 W (Copying)

Weight: 12 kg (26.4 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:13 W (Copying)

15 W (Optional Tray Heater On)

Size (W x D x H): 550 mm x 520 mm x 134 mm

Options

A861-1

MECHANICAL COMPONENT LAYOUT 17 May, 1999

1.2 MECHANICAL COMPONENT LAYOUT

2

1. Paper Feed Roller

2. Tray

3

4

A861V101.WMF

1

3. Bottom Plate

4. Optional Tray Heater

A861-2

17 May, 1999 ELECTRICAL COMPONENT LAYOUT

1.3 ELECTRICAL COMPONENT LAYOUT

1

2

3

4

5

6

7

10

8

9

A861V102.WMF

1. Tray Main Board

2. Lift Sensor

3. Lift Motor

4. Paper Height 2 Sensor

5. Paper Height 1 Sensor

6. Paper Feed Motor

7. Tray Cover Switch

8. Paper End Sensor

9. Paper Size Switch

10. Optional Tray Heater

Options

A861-3

ELECTRICAL COMPONENT DESCRIPTION 17 May, 1999

1.4 ELECTRICAL COMPONENT DESCRIPTION

Symbol Name Function Index No.

Motors

M1 Paper Feed Drives the paper feed roller. 6
M2 Lift Lifts the tray bottom plate. 3

Sensors

S1
S2

S3 Paper Height 1 Detects the amount of paper in the tray. 5
S4 Paper Height 2 Detects the amount of paper in the tray. 4

Switches

SW1 Tray Cover Detects whether the tray cover is opened. 7
SW2 Paper Size Determines what paper size is in the tray. 9

Lift Detects when the paper in the tray is at the

correct feed height.

Paper End Informs the copier when the tray runs out of

paper.

2
8

PCBs

PCB1

Others

H1

Tray Main Controls the paper tray unit and communicates

with the copier.

Optional Tray
Heater

Removes humidity from the paper in the tray.

1

10

A861-4

17 May, 1999 DRIVE LAYOUT

1.5 DRIVE LAYOUT

1

2

A861V103.WMF

1. Paper Feed Motor 2. Paper Feed Roller

Options

A861-5

PAPER FEED AND SEPARATION 17 May, 1999

2. DETAILED DESCRIPTIONS

2.1 PAPER FEED AND SEPARATION

[A]

[B]

[C]

A861D103.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].

A861-6