Ricoh DF43 SPECIFICATIONS

DOCUMENT FEEDER (A628)

1 August 1996 SPECIFICATIONS

1. SPECIFICATIONS

Original Size: Standard Size A3 to A5

Non-standard Size
Max. width 297 mm
Min. width 105 mm
Max. length 1260 mm

Min. length 128 mm
Original Weight : 50 g to 90 g
Table Capacity : 30 sheets (70 kg)
Original Standard Position: Rear left corner
Separation: FRR
Original Transport: Roller transport
Original Feed Order: From top original
Reproduction Range: 37 to 150%
Power Source: 24 & 5 Vdc from the copier
Power Consumption: 25 W
Dimensions (W x D x H): 550 x 470 x 120 mm
Weight: 9 kg

A628-1

COMPONENT LAYOUT 1 August 1996

2. COMPONENT LAYOUT

2.1 MECHANICAL COMPONENT LAYOUT

1

10

9

87

1. Separation Roller

2. Paper Feed Belt

23

6

4

5

6. Original Exit Roller

7. 2nd Transport Roller

A628O005.wmf

3. Pick-up Roller

4. Original Entrance Guide

5. Original Table

8. DF Exposure Glass

9. Original Exposure Guide

10. 1st Transport Roller

A628-2

1 August 1996 COMPONENT LAYOUT

2.2 ELECTRICAL COMPONENT LAYOUT

12

13

11

14

10

15

1

2

3

4

5

6

7

9

8

A628O003.wmf

1. DF Feed Clutch

2. Feed Cover Open Sensor

3. DF Feed Motor

4. DF Pick-up Solenoid

5. DF Drive PCB

6. DF Position Sensor

7. APS Start Sensor

8. Original Length Sensor 2

9. Original Length Sensor 1

10. Stamper Solenoid

11. Original Width Sensor 3

12. Original Width Sensor 2

13. Original Width Sensor 1

14. Original Set Sensor

15. Registration Sensor

A628-3

COMPONENT LAYOUT 1 August 1996

2.3 ELECTRICAL COMPONENT DESCRIPTION

Symbol Name Function Index

No.

Motors

S1 DF Feed Drives all the rollers. 3

Sensors

S1 APS Start Informs the CPU when the DF is opened and

closed (for platen mode) so tha t ori gi nal size

sensors in the copi er can check the or i gi nal size.
S2 DF Position Detects whether the DF is lifted or not. 6
S3 Registration Detects the leadi ng edge of the origi nal to turn off

the transport mo t or , detects the original exposure

timing, and ch ecks for original m i sf eeds.
S4 Feed Cover Open

Sensor
S5 Original Wi dt h - 1 Detects the original width 13
S6 Original Wi dt h - 2 Detects the original width 12
S7 Original Wi dt h - 3 Detects the original width 11
S8 Original Le ngt h - 1 Detects the original length. 9
S9 Original Le ngt h - 2 Detects the original length. 8
S10 Original Set Detects if an origi nal is on the feed tabl e. 14

Detects whether the feed-in cov er is opened or
not.

7

5

2

Solenoids

SOL1 DF Pick-up Controls the up-down movement of the origina l

table.

SOL2 Stamper Energizes the stamper to mark on the original. 10

Clutches

MC1 DF Feed Transfers tr ansport motor dri ve to the pick-up

roller and feed belt.

PCBs

PCB1 DF D rive In terfaces the sensor signals with t he copier, and

transfers the magnetic clutch, solenoid and motor
drive signals from the copier.

4

1

5

A628-4

1 August 1996 COMPONENT LAYOUT

2.4 DRIVE LAYOUT

81

7

2

6

5

4

1. DF Feed Clutch

2. DF Feed Motor

3. Exit Roller

4. 2nd Transport Roller

3

A628O004.wmf

5. 1st Transport Roller

6. Separation Roller

7. Original Feed Belt

8. Pick-up Roller

A628-5

DETAILED DESCRIPTIONS 1 August 1996

3. DETAILED DESCRIPTIONS

3.1 ORIGINAL SIZE DETECTION

[D]

[E]

[C]

[B]

A628O006.wmf

[A]

The DF has three width sensors (- 1 [A], - 2 [B], and - 3[C]) to detect the
original width and two original length sensors (-1 [D] and -2 [E]) to detect the
original length. The DF detects the original size through the combination of
those five sensors as shown in the table on the next page.

When using an original of a non-standard size, the user needs to input the
original length at the operation panel.

A628-6

1 August 1996 DETAILED DESCRIPTIONS

A3 (297 x 420)
B4 (257 x 364)
A4 (Lengthwise)

(210 x 297)
A4 (297 x 210) (Si dew ays)
B5 (182 x 257)

(Lengthwis e)
B5 (257 x 182) (Si dew ays)
A5 (148 x 210)

(Lengthwis e)
A5 (210 x 148) (Si dew ays)
11" x 17" (DLT)
11" x 15"
10" x 14"

8.5" x 14" (LG)

8.5" x 13" (F4)
8" x 13" (F)

8.5" x 11" (Lengt hwi se)

8.5" x 11" (Sideways)
10" x 8" (Lengthwi se)

5.5" x 8.5" (Len gt hw ise)
(HLT)

5.5" x 8.5" (Sidew ays)
(HLT)

NA EU Original

Width-1

7m
7m

7m
7m
7m
7m
77

7m
m7
m7
m7
m7

7m
mm
m7
m7
m7

m7

m7

ON ON ON ON ON
ON ON – ON ON

ON – – ON –
ON ON ON – –

–––ON–

ON ON – – –

–––––

ON––––
ON ON ON ON ON
ON ON ON ON ON
ON ON – ON ON
ON – – ON ON
ON – – ON ON
ON – – ON ON
ON – – ON –
ON ON ON – –
ON – – ON –

–––––

ON––––

Original
Width-2

Original
Width-3

Original

Length-1

Original

Length-2

Key

7

: No, m: Yes

ON: Paper present

A628-7

DETAILED DESCRIPTIONS 1 August 1996

3.2 PICK-OFF AND SEPARATION MECHANISM

[F]

[D]

[B]

[C]

A628O008.wmf

[A]

[E]

[B]

[F]

A628O009.wmf

[G]

A628O010.wmf

When the print key is pressed, the DF pick-up solenoid [A] turns on and the
originals are lifted up to the pick-up roller [B] by the entrance guide [C]. At the
same time, the DF feed clutch [D] turns on.

At 300 ms after this, the DF feed motor turns on. The original is fed to the
paper feed belt [E] from the top page. The pages are separated by the
separation roller [F] and the top sheet of the original is fed to the 1st transport
roller [G]. The original separation system uses the FRR system.

A628-8

1 August 1996 DETAILED DESCRIPTIONS

3.3 ORIGINAL TRANSPORT AND EXIT MECHANISM

[D]

[A]

[B]

[C]

A628O011.wmf

When the leading edge of the original reaches the registration sensor [A], the
DF feed motor turns off. After a short time the DF feed motor turns on again.
The original is fed to the DF exposure glass [B] and it is scanned in this area.
The original is fed through to the 2nd transport roller [C] and fed out by the
exit roller [D].

The DF feed motor speed while feeding the original to the registration sensor
is 47.5 mm/s. However, when the motor turns on again to feed the original to
the exposure glass, the speed depends on the selected reproduction ratio. At
100%, it is 90 mm/s.

A628-9