Ricoh DF50 SPECIFICATIONS

DOCUMENT FEEDER

DF UNIT TYPE 50 (50-SHEET)

(C562)

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15 November 1995 OVERALL MACHINE INFORMATION

1.

OVERALL MACHINE INFORMATION

1.1 SPECIFICATIONS

Original Type: Sheet-feed
Original Paper Size: Maximum 307 mm x 432 mm (12.0" x 17.0")

Minimum 90 mm x 140 mm (3.6" x 5.5")
Original Weight: 40.7 g/m2 to 127.9 g/m2, 10.8 lb to 34 lb
ADF Original Capacity: 50 sheets (66 g/m2, 17.6 lb)

42 sheets (80 g/m2, 20 lb) or 4.2 mm, 0.15"

height

1.2 MECHANICAL COMPONENT LAYOUT

1

1. Original Exit Tray

2. 2nd Original Transport Roller

3. 1st Original Transport Roller

4. Separation Roller

5. Feed Roller

6. Pickup Roller

2

3

4

5

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1

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OVERALL MACHINE INFORMATION 15 November 1995

1.3 ELECTRICAL COMPONENT LAYOUT

3

2

4

5

1

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1. Original Exit Sensor 5. ADF Motor

2. Scan Line Sensor 6. ADF Interface Board

3. Original Registration Sensor 7. Original Width Sensor

4. ADF Cover Sensor 8. Original Set Sensor

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COMPONENT DESCRIPTION

Index No. Name Function

1 Original Exit Sensor Informs the CPU when the original activates the

sensor. Also detects original misfeeds.

2 Scan Line Sensor Determines the timing for scanning. Also

detects original misfeeds.

3 Original Registration

Sensor

4 ADF Cover Sensor Informs the CPU when the ADF cover is

5 ADF Motor Drives the mechanisms in the ADF.
6 ADF Interface Board Controls the ADF in response to signals from

7 Original Width Sensor Informs the CPU of the original width.
8 Original Set Sensor Informs the CPU when an original is placed in

Determines the timing for the ADF motor to
start. Also detects original misfeeds.

opened.

the main body.

the ADF.

2

[P]

15 November 1995 SECTIONAL DESCRIPTIONS

2.

SECTIONAL DESCRIPTIONS

2.1 DRIVE MECHANISM

[F]

[H]

[G]: Original Set Sensor
[H]: 1st Original Transport Roller

The ADF motor [A] is a stepper motor. The ADF motor rota te s clockwise and
then counterclockwise to fee d th e original. When the Master Makin g key is
pressed, the ADF motor rotates clockwise to drive the pick up roller [B] an d
the feed roller [C] turns clockwise to feed the top page of the original. When
the original has been fed 14.5 mm after the original registra tio n sen sor [D]
was activated, the ADF motor starts to rotate counterclockwise. This drives
the lower 1st original transport roller [E ] and the lowe r origin al exit roller [F]
counterclockwise, feeding the original.

[N] [O]

[F]

[E]

[G]

[B]

[A]

[C]

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[J]

[R]

[M]

[I]: Original Set Sensor
[J]: Feed Roller
[K]: 1st Original Transport Roller
[L]: Exposure Glass
[M]: 2nd Original Transport Roller

[L]

[K]

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[Q]

[N]: Original Exit Sensor
[O]: Scan Line Sensor
[P]: Original Registration Sensor
[Q]: Separation Roller
[R]: Original Paper Path

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[I]

SECTIONAL DESCRIPTIONS 15 November 1995

2.2 PAPER FEED AND SEPARATIO N

[G]

[B]

[F]
[E]

[D]

[A]

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[C]

[C]

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When the originals are placed on the ADF and the Master Making key is
pressed, the pickup roller [A] starts to rotate as it is lowered by the spring
clutch [B] to touch the top page of the document. The original shutter [C] is
lowered by the spring clut ch an d th e lever [D] when the ADF motor is turn ed
on. The separation roller [E] and the feed roller [ F] allo w only one page into
the scanner. The one-way clutch on the feed roller pre vents its backward
rotation when the ADF motor [G ] rot at es cou nt erclockwise.

The pick-up and the shu tter torque are adjustable by the length of the spring.
See Pick-up Torque Adjustmen t and Sh ut ter Torque Adjustment for det ails.

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15 November 1995 SECTIONAL DESCRIPTIONS

2.3 ORIGINAL SIZE DETECTION

[E]

[A]

[B]

[C]

[D]

[A]: Original Width Sensor-0
[B]: Original Width Sensor-1
[C]: Original Width Sensor-2

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[D]: Original Width Sensor-3
[E]: Front Original Guid e

There are 4 sensors (photointe rrupters) for detecting the original wid th . Whe n
the front original guide [E] is shifted to match th e orig inal width, the plate [F ]
moves with the guide. Eight actuators are installe d on the plat e, and
depending on the side guide position, the sensor status will be changed.

The following table shows the relationship between the paper size and the
sensor status.

Original Size A3 DLT B4 LT/LG A4 B5 A5

Original Size Sensor-0 O O O
Original Size Sensor-1 O O O O
Original Size Sensor-2 OOOO
Original Size Sensor-3 O O O

X= Non-blocked, O= Blocked
* : All of the above original sizes are for len gthwise feed.

2.4 ORIGINAL MISFEED DETE CTI ON

The machine indicate s an original misfeed in the followin g con ditions.

•

When the original registratio n sen sor do es not go ON within 3 seconds
after the ADF motor starts rotating (clockwise).

•

When the scan line sensor d oes n ot go ON with in 2. 5 seconds after the
original registration sensor is turned on.

•

When the original exit sensor doe s not go ON afte r t he scan line sensor is
turned on and the original has been fed 60 millimeters.

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SECTIONAL DESCRIPTIONS 15 November 1995

2.5 ADF OPEN/CLOSE DETECTION

[A]

[B]

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The ADF set sensor detects whet her t he ADF unit is opened or closed. This
sensor is a reed switch. A magnet mount ed on the ADF [A ] act ivat es th e ree d
switch [B]. When an original is pla ced in the ADF, if this re ed swit ch is not
activated, the Master Making key is disabled.

2.6 ADF POSITION DETECTIO N

[A]

[B]

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When the ADF cover [A] is opened, the plat en cover po sitio n sen sor [B ] is
deactivated. When this sensor is deactivated, the Master Making key is
disabled.

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15 November 1995 INSTALLATION PROCEDURE

3.

INSTALLATION PROCEDURE

3.1 ACCESSORY CHECK

Decal Kit
Test Chart

Thumb Screws,
Screw and
Toothed Washer

Document Feeder Unit

Make sure that you have all the accesso ries liste d be low.
(1) Document Feeder Unit

(2) Bracket (2 pcs.)
(3) Screw and a Toothed Washer
(4) Thumb Screws (4 pcs.)
(5) Test Chart
(6) Installation Procedure
(7) Decal Kit

Brackets (2 pcs)

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Pin

DF Connector

INSTALLATION PROCEDURE 15 November 1995

3.2 INSTALLATION PROCEDURE

[A]

[B]

[C]

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[D]

1. Turn off the main switch and unplug the power cord.

2. Open the Platen Cover, remove 4 screws [A] and remo ve the Platen

Cover.

3. Remove 3 screws [B] and remove the Upper Rear Cover.

4. Remove 2 screws [C] and remove the cover plate.

Pin

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5. Let the DF connector through the opening and mount the DF Unit as

shown in the diagram [D].

6. Secure the DF Unit by 4 screws that were removed in step 2.

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