Ricoh pfu305 Service Manual

500-SHEET PAPER TRAY UNIT

(SECOND AND THIRD TRAYS)

(Machine Code: G908)

31 March, 1999 SPECIFICATIONS

1. OVERALL MACHINE INFORMATION

1.1 SPECIFICATIONS

Paper Feed Method Friction pad
Configuration Front loading
Paper Capacity 500 sheets (80 g/m2, 20 lbs.)
Paper Size Short edge feed:

A3, 11" x 17", 8
8

" x 13", 8

1/4

Long edge feed:

A4, 8
5

1/2

1/2

" x 8

" x 11", 7

")

1/2

* The paper size should be specified with the system menu

(at the operation panel by the user).

Paper Weight 64 to 105 g/m2 (17 to 28 lbs.)

" x 14", Others* (B4 JIS, 8" x 13",

1/2

" x 13")

1/2

1/4

" x 10

", Others* (B5 JIS, A5,

1/2

Power DC 24V, DC 5V (supplied by the main unit)
Dimensions 580 x 465 x 138 mm (22.8” x 18.3” x 5.4”)
Tray Weight 6.0 kg.

G908-1

Options

PARTS LAYOUT 31 March, 1999

1.2 PARTS LAYOUT

1

6

2

G908D801.WMF

1. Pull-out sensor

2. Paper end sensor

3. Paper feed clutch

4. Paper size switch

5. Tray main motor

6. Tray control board

3

45

G908-2

31 March, 1999 OVERVIEW

2. DETAILED SECTION DESCRIPTIONS

2.1 OVERVIEW

2.1.1 MECHANICAL LAYOUT

10 9 8 7 56

4

G908D802.WMF

1. Tray bottom plate

2. Friction pad

3. Paper lift arm

4. Paper size switch

5. Pull-out roller (idler)

6. Pull-out roller (drive)

7. Pull-out sensor

8. Paper feed roller

9. Paper end sensor

3

12

10. Grounding point

Options

G908-3

OVERVIEW 31 March, 1999

2.1.2 CONFIGURATION

Function Main function Overview

Paper feed/separation Friction pad separation method
Tray bottom plate pressure

Paper feed

Drive Motor drive Stepper motor

Paper end detection Detection by actuator and photo interrupter
Paper size detection User-specified by a dial; detected by

Paper tray bottom plate pressurized by a
spring under tension

switches.

G908-4

31 March, 1999 MECHANISMS

2.2 MECHANISMS

2.2.1 DRIVE

[C]

[D]

[B]

[A]

G908D803.WMF

Gears and the paper feed clutch [A] transfer drive from the tray main motor [B] to
the paper feed roller [C].

The gear for the paper feed clutch transfers drive to the pull-out roller [D].
The MCU controls the drive motor and paper feed clutch.

G908-5

Options