Ricoh df75 SPECIFICATIONS
AUTO REVERSE DOCUMENT FEEDER
(Machine Code: B386)
10 August, 2001 |
SPECIFICATIONS |
1. OVERALL MACHINE INFORMATION
1.1 SPECIFICATIONS
Original Size: |
Standard sizes |
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Single-sided mode: A3 to A5, DLT to HLT |
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Double-sided mode: A3 to A4, DLT to LT |
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Non-standard sizes (Single-sided mode only) |
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Max. width 297 mm |
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Min. width 105 mm |
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Max. length 1260 mm |
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Min. length 128 mm |
Original Weight: |
Single-sided mode: 52~128 g/m2,14~34 lb |
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Double-sided mode: 52~105 g/m2,14~28 lb |
Table Capacity: |
30 sheets (70 kg) |
Original Standard Position: |
Center |
Separation: |
FRR |
Original Transport: |
Roller transport |
Original Feed Order: |
From the top original |
Reproduction Range: |
25 to 200 % (Sub scan direction only) |
Power Source: |
24 & 5 Vdc from the copier |
Power Consumption: |
50 W |
Dimensions (W x D x H): |
550 x 470 x 110 mm |
Weight: |
10 kg |
Options
B386-1
MECHANICAL COMPONENT LAYOUT |
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10 August, 2001 |
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1.2 MECHANICAL COMPONENT LAYOUT |
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B386D201.WMF |
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17 |
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1. |
Separation Roller |
11. |
Reverse Roller |
2. |
Paper Feed Belt |
12. |
Junction Gate |
3. |
Pick-up Roller |
13. |
Exit Roller |
4. |
Original Set Sensor |
14. |
Original Exit Sensor |
5. |
Original Trailing Edge Sensor |
15. |
Stamp |
6. |
Original Width Sensor Board |
16. |
2nd Transport Roller |
7. |
Original Length Sensor 1 |
17. |
Original Exposure Guide |
8. |
Original Length Sensor 2 |
18. |
Registration Sensor |
9. |
Original Table |
19. |
1st Transport Roller |
10. Reverse Table
B386-2
10 August, 2001 |
ELECTRICAL COMPONENT LAYOUT |
1.3 ELECTRICAL COMPONENT LAYOUT
1
17
16
15
14
13
12
11
1.DF Feed Clutch
2.Feed Cover Sensor
3.Original Width Sensor Board
4.Original Length Sensor 1
5.DF Pick-up Solenoid
6.Original Length Sensor 2
7.Junction Gate Solenoid
8.DF Drive PCB
9.DF Position Sensor
2 3
4
5
6 7
8
9
10
B386D202.WMF
10.DF Feed Motor
11.DF Transport Motor
12.Original Exit Sensor
13.Stamp Solenoid
14.Original Trailing Edge Sensor
15.Original Set Sensor
16.Original Reverse Sensor
17.Registration Sensor
Options
B386-3
ELECTRICAL COMPONENT DESCRIPTION 10 August, 2001
1.4 ELECTRICAL COMPONENT DESCRIPTION
Symbol |
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Name |
Function |
Index |
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No. |
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Motors |
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M1 |
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DF Feed |
Drives the feed belt, separation, pick-up, and |
10 |
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reverse table rollers. |
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M2 |
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DF Transport |
Drives the transport and exit rollers |
11 |
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Sensors |
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S1 |
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DF Position |
Detects whether the DF is lifted or not. |
9 |
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S2 |
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Registration |
Detects the leading edge of the original to turn |
17 |
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off the DF feed and transport motors, detects |
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the original exposure timing, and checks for |
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original misfeeds. |
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S3 |
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Feed Cover Open |
Detects whether the feed-in cover is opened or |
2 |
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Sensor |
not. |
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S4 |
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Original Width |
Detects the original width. |
3 |
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Sensor Board |
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S5 |
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Original Length - 1 |
Detects the original length. |
4 |
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S6 |
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Original Length - 2 |
Detects the original length. |
6 |
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S7 |
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Original Set |
Detects if an original is on the feed table. |
15 |
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S8 |
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Original Exit |
Detects the leading edge of the original to turn |
12 |
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on the junction gate solenoid and checks for |
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original misfeeds. |
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Detects the trailing edge of the original to turn |
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off the transport and feed motor and junction |
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gate solenoid. |
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In single-sided mode, used to detect original |
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misfeeds. |
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S9 |
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Original Trailing |
Detects the trailing edge of the last original to |
14 |
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Edge |
stop copy paper feed and to turn off the |
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transport motor, and checks for original |
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misfeeds. |
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S10 |
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Original Reverse |
Detects when the original is fed from the |
16 |
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Sensor |
reverse area during duplex scanning. |
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Solenoids |
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SOL1 |
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DF Pick-up |
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Controls the up-down movement of the original |
5 |
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table. |
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SOL2 |
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Stamp |
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Energizes the stamper to mark the original. |
13 |
SOL3 |
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Junction Gate |
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Opens and closes the junction gate. |
7 |
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Clutches |
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MC1 |
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DF Feed |
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Transfers transport motor drive to the pick-up |
1 |
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roller and feed belt. |
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PCBs |
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PCB1 |
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DF Drive |
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Interfaces the sensor signals with the copier, |
8 |
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and transfers the magnetic clutch, solenoid and |
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motor drive signals from the copier. |
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B386-4
10 August, 2001
1.5 DRIVE LAYOUT
4
3
2
1
10
9
8
7
1.Separation Roller
2.Original Feed Belt
3.Pick-up Roller
4.DF Feed Clutch
5.DF Transport Motor
DRIVE LAYOUT
5
6
B386D203.WMF
6.DF Feed Motor
7.Reverse Table Roller
8.2nd Transport Roller
9.Exit Roller
10.1st Transport Roller
Options
B386-5
ORIGINAL SIZE DETECTION |
10 August, 2001 |
2. DETAILED SECTION DESCRIPTIONS
2.1 ORIGINAL SIZE DETECTION
[A]
[B]
[C]
B386D503.WMF
The original size detection mechanism consists of the original width sensor board [A] and two original length sensors-1 [B] and -2 [C]. Based on the combined output of the length sensors and the width sensor board, the machine can detect the size of the original. This integrated detection mechanism is detailed in the table on the next page.
Note that the width sensor’s terminal plate is attached to the original guide, so the widths of the originals must all be the same.
B386-6
10 August, 2001 |
ORIGINAL SIZE DETECTION |
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NA |
EU |
Original |
Original |
Original Width-3 |
Original |
Original |
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Width-1 |
Width-2 |
P4 |
P3 |
P2 |
P1 |
Length-1 |
Length-2 |
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A3 (297 x 420) |
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L |
L |
ON |
— |
— |
— |
ON |
ON |
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B4 (257 x 364) |
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L |
H |
— |
ON |
— |
— |
ON |
ON |
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A4 (Lengthwise) |
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H |
L |
— |
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ON |
— |
ON |
— |
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(210 x 297) |
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A4 (297 x 210) |
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L |
L |
ON |
— |
— |
— |
— |
— |
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(Sideways) |
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B5 (182 x 257) |
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H |
H |
— |
— |
— |
ON |
ON |
— |
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(Lengthwise) |
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B5 (257 x 182) |
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L |
H |
— |
ON |
— |
— |
— |
— |
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(Sideways) |
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A5 (148 x 210) |
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H |
H |
— |
— |
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ON |
— |
— |
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(Lengthwise) |
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A5 (210 x 148) |
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H |
L |
— |
— |
ON |
— |
— |
— |
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(Sideways) |
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11" x 17" (DLT) |
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L |
L |
ON |
— |
— |
— |
ON |
ON |
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11" x 15" |
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L |
L |
ON |
— |
— |
— |
ON |
ON |
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10" x 14" |
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L |
H |
— |
ON |
— |
— |
ON |
— |
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8.5" x 14" (LG) |
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H |
L |
— |
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ON |
— |
ON |
— |
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8.5" x 13" (F4) |
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H |
L |
— |
— |
ON |
— |
ON |
— |
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8" x 13" (F) |
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H |
L |
— |
— |
ON |
— |
ON |
— |
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8.5" x 11" |
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H |
L |
— |
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ON |
— |
ON |
— |
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(Lengthwise) |
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8.5" x 11" |
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L |
L |
ON |
— |
— |
— |
— |
— |
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(Sideways) |
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10" x 8" |
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L |
H |
— |
ON |
— |
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ON |
— |
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(Lengthwise) |
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5.5" x 8.5" |
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(Lengthwise) |
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H |
H |
— |
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ON |
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(HLT) |
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5.5" x 8.5" |
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H |
L |
— |
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ON |
— |
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(Sideways) (HLT) |
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Key
: No, : Yes ON: Paper present
NA: North America, EU: Europe
NOTE: 1) P1-P4 represent the four positions on the width sensor board. ON indicates the presence of the terminal plate in a given position. “Original Width-1” and “Original Width-2” are the outputs from the sensor board to the DF main board. The state of these outputs (L or H) depends on the position of the terminal plate on the sensor board (P1, P2, P3, or P4). For example, if the terminal plate is at P4, both outputs are L.
2)A reading of “L” on either of the width sensor outputs indicates that the terminal plate is connecting the GND pattern with the width sensor output signal line.
3)The machine cannot detect more than one size of originals in the same job.
Options
B386-7
ORIGINAL SIZE DETECTION |
10 August, 2001 |
Original Width Sensor Board
GND Pattern |
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Original Width 1 |
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Original Width 2 |
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Original Side |
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P4 |
P3 |
P2 |
P1 |
Guide Position |
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A3/A4S |
B4/B5S |
A4L/A5S |
B5L/A5L |
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The signal is "L" when the terminal plate is connected to the GND pattern.
B386D501.WMF
B386-8
10 August, 2001 |
MIXED ORIGINAL SIZE MODE |
2.2 MIXED ORIGINAL SIZE MODE
This section explains what happens when the user selects mixed original size mode.
Because this ADF is a sheet-through document feeder, the method for original document width detection is the same as when the originals are the same size, but the document length detection method is different. Therefore, the scanning speed is slightly slower.
Document length detection
From when the registration sensor switches on until it switches off, the CPU counts the transport motor pulses. The number of pulses determines the length of the original.
Feed-in cycle
When the original size for the copy modes listed below cannot be determined, the image cannot be correctly scaled (reduced or enlarged) or processed until the original’s length has been accurately detected. The length must be determined before the image is scanned.
Auto Reduce/Enlarge
Centering
Erase Center/Border
Booklet
Image Repeat
The originals follow this path:
1.Length detection ! Scanning glass ! Inverter table
2.Inverter table ! Scanning glass ! Inverter table (restores the original order)
3.Inverter table ! Scanning glass (image scanned) ! Exit tray
Normal feed-in
In a copy mode other than those listed above, when the reduction/enlargement ratio has been determined, the originals are scanned normally. In order to store the scanned images, a large area of memory (the detected original width x 432 mm length) is prepared. Next, only the portion of the image up to the detected original length is read from memory and printed.
Options
B386-9
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